/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:50:06,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:50:06,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:50:06,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:50:06,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:50:06,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:50:06,322 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:50:06,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:50:06,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:50:06,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:50:06,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:50:06,336 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:50:06,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:50:06,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:50:06,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:50:06,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:50:06,339 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:50:06,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:50:06,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:50:06,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:50:06,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:50:06,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:50:06,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:50:06,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:50:06,358 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:50:06,359 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:50:06,359 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:50:06,361 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:50:06,361 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:50:06,362 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:50:06,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:50:06,362 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:50:06,363 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:50:06,364 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:50:06,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:50:06,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:50:06,365 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:50:06,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:50:06,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:50:06,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:50:06,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:50:06,368 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 [2023-04-02 23:50:06,400 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:50:06,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:50:06,401 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:50:06,401 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:50:06,402 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:50:06,402 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:50:06,402 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:50:06,402 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:50:06,402 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:50:06,402 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:50:06,403 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:50:06,403 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:50:06,403 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:50:06,404 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:50:06,404 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:50:06,404 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:50:06,404 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:50:06,404 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:50:06,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:50:06,405 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:50:06,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:50:06,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:50:06,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:50:06,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:50:06,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:50:06,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:50:06,406 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:50:06,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:50:06,406 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:50:06,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:50:06,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:50:06,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:50:06,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:50:06,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:50:06,407 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:50:06,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:50:06,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:50:06,407 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:50:06,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:50:06,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:50:06,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:50:06,408 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:50:06,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:50:06,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:50:06,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:50:06,691 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:50:06,692 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:50:06,693 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2023-04-02 23:50:07,904 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:50:08,245 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:50:08,246 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product32.cil.c [2023-04-02 23:50:08,263 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86901567c/3bf210f456e24e3eb8a5ac6ba2699302/FLAG0d6012573 [2023-04-02 23:50:08,278 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86901567c/3bf210f456e24e3eb8a5ac6ba2699302 [2023-04-02 23:50:08,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:50:08,282 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:50:08,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:50:08,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:50:08,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:50:08,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:50:08" (1/1) ... [2023-04-02 23:50:08,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d620cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:08, skipping insertion in model container [2023-04-02 23:50:08,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:50:08" (1/1) ... [2023-04-02 23:50:08,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:50:08,376 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:50:08,809 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_spec2_product32.cil.c[40079,40092] [2023-04-02 23:50:08,905 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:50:08,920 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:50:08,983 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_spec2_product32.cil.c[40079,40092] [2023-04-02 23:50:09,054 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:50:09,077 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:50:09,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:09 WrapperNode [2023-04-02 23:50:09,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:50:09,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:50:09,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:50:09,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:50:09,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:09" (1/1) ... [2023-04-02 23:50:09,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:09" (1/1) ... [2023-04-02 23:50:09,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:09" (1/1) ... [2023-04-02 23:50:09,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:09" (1/1) ... [2023-04-02 23:50:09,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:09" (1/1) ... [2023-04-02 23:50:09,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:09" (1/1) ... [2023-04-02 23:50:09,219 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:09" (1/1) ... [2023-04-02 23:50:09,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:09" (1/1) ... [2023-04-02 23:50:09,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:50:09,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:50:09,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:50:09,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:50:09,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:09" (1/1) ... [2023-04-02 23:50:09,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:50:09,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:50:09,274 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) [2023-04-02 23:50:09,291 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 [2023-04-02 23:50:09,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:50:09,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:50:09,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-02 23:50:09,308 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:50:09,308 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2023-04-02 23:50:09,308 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2023-04-02 23:50:09,308 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__3 [2023-04-02 23:50:09,308 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__4 [2023-04-02 23:50:09,308 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-02 23:50:09,309 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-02 23:50:09,309 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-02 23:50:09,309 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-02 23:50:09,309 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-02 23:50:09,309 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-02 23:50:09,309 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-02 23:50:09,309 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-02 23:50:09,309 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-02 23:50:09,309 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-02 23:50:09,309 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-02 23:50:09,310 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-02 23:50:09,310 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-02 23:50:09,310 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-02 23:50:09,310 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-02 23:50:09,310 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-02 23:50:09,310 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-02 23:50:09,310 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-02 23:50:09,310 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-02 23:50:09,310 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-02 23:50:09,310 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-02 23:50:09,310 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-02 23:50:09,310 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-02 23:50:09,310 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-02 23:50:09,311 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-02 23:50:09,311 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-02 23:50:09,311 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-02 23:50:09,311 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-02 23:50:09,311 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-02 23:50:09,311 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-02 23:50:09,311 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-02 23:50:09,311 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-02 23:50:09,311 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-02 23:50:09,311 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-02 23:50:09,312 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-02 23:50:09,312 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-02 23:50:09,312 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-02 23:50:09,312 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-02 23:50:09,312 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-02 23:50:09,312 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-02 23:50:09,312 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:50:09,312 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-02 23:50:09,312 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-02 23:50:09,312 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-02 23:50:09,312 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-02 23:50:09,313 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-02 23:50:09,313 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-02 23:50:09,313 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-02 23:50:09,313 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__weight [2023-04-02 23:50:09,313 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-02 23:50:09,313 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-02 23:50:09,313 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-02 23:50:09,313 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-02 23:50:09,313 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-02 23:50:09,313 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-02 23:50:09,314 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-02 23:50:09,314 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-02 23:50:09,314 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-02 23:50:09,314 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-02 23:50:09,314 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-04-02 23:50:09,314 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__twothirdsfull [2023-04-02 23:50:09,314 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-02 23:50:09,314 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-02 23:50:09,314 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-02 23:50:09,314 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-02 23:50:09,314 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-04-02 23:50:09,314 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-02 23:50:09,315 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-02 23:50:09,315 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-02 23:50:09,315 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-04-02 23:50:09,315 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-02 23:50:09,315 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__executivefloor [2023-04-02 23:50:09,315 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-02 23:50:09,315 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-02 23:50:09,315 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-04-02 23:50:09,315 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloor [2023-04-02 23:50:09,315 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:50:09,316 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:50:09,316 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:50:09,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:50:09,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:50:09,316 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-02 23:50:09,316 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-02 23:50:09,316 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-02 23:50:09,316 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2023-04-02 23:50:09,316 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2023-04-02 23:50:09,316 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__3 [2023-04-02 23:50:09,316 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__4 [2023-04-02 23:50:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-02 23:50:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-02 23:50:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-02 23:50:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-02 23:50:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-02 23:50:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-02 23:50:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-02 23:50:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-02 23:50:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 23:50:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 23:50:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-02 23:50:09,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 23:50:09,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 23:50:09,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:50:09,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 23:50:09,318 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-02 23:50:09,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:50:09,318 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-02 23:50:09,318 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-02 23:50:09,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:50:09,318 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-02 23:50:09,318 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-02 23:50:09,319 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-02 23:50:09,319 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-02 23:50:09,319 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-02 23:50:09,319 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-02 23:50:09,319 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-02 23:50:09,319 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-02 23:50:09,319 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-02 23:50:09,319 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-02 23:50:09,319 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-02 23:50:09,319 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-02 23:50:09,319 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-02 23:50:09,320 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-02 23:50:09,320 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-02 23:50:09,320 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-02 23:50:09,320 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-02 23:50:09,320 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-02 23:50:09,320 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-02 23:50:09,320 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-02 23:50:09,320 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 23:50:09,320 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-02 23:50:09,320 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-02 23:50:09,320 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-02 23:50:09,320 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-02 23:50:09,321 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-02 23:50:09,321 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-02 23:50:09,321 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-02 23:50:09,321 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-02 23:50:09,321 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-02 23:50:09,321 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-02 23:50:09,321 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-02 23:50:09,321 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-02 23:50:09,321 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-02 23:50:09,321 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-02 23:50:09,321 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-02 23:50:09,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:50:09,322 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-02 23:50:09,322 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-02 23:50:09,322 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-02 23:50:09,322 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-02 23:50:09,322 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-02 23:50:09,322 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-04-02 23:50:09,322 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloor [2023-04-02 23:50:09,322 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-02 23:50:09,322 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-02 23:50:09,322 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__weight [2023-04-02 23:50:09,322 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-02 23:50:09,322 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-02 23:50:09,322 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-02 23:50:09,323 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-02 23:50:09,323 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-02 23:50:09,323 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-04-02 23:50:09,323 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__twothirdsfull [2023-04-02 23:50:09,323 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-02 23:50:09,323 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-02 23:50:09,323 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-04-02 23:50:09,323 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2023-04-02 23:50:09,323 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-02 23:50:09,323 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-02 23:50:09,323 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-02 23:50:09,323 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-04-02 23:50:09,323 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__executivefloor [2023-04-02 23:50:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-02 23:50:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:50:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:50:09,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:50:09,631 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:50:09,634 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:50:10,928 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:50:11,786 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:50:11,786 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-02 23:50:11,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:50:11 BoogieIcfgContainer [2023-04-02 23:50:11,791 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:50:11,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:50:11,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:50:11,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:50:11,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:50:08" (1/3) ... [2023-04-02 23:50:11,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e89ed6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:50:11, skipping insertion in model container [2023-04-02 23:50:11,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:50:09" (2/3) ... [2023-04-02 23:50:11,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e89ed6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:50:11, skipping insertion in model container [2023-04-02 23:50:11,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:50:11" (3/3) ... [2023-04-02 23:50:11,798 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product32.cil.c [2023-04-02 23:50:11,815 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:50:11,816 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:50:11,873 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:50:11,880 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;@2a2d4b49, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:50:11,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:50:11,889 INFO L276 IsEmpty]: Start isEmpty. Operand has 616 states, 359 states have (on average 1.467966573816156) internal successors, (527), 388 states have internal predecessors, (527), 187 states have call successors, (187), 57 states have call predecessors, (187), 57 states have return successors, (187), 177 states have call predecessors, (187), 187 states have call successors, (187) [2023-04-02 23:50:11,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-02 23:50:11,905 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:11,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:50:11,907 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:11,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:11,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1510663620, now seen corresponding path program 1 times [2023-04-02 23:50:11,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:11,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763883450] [2023-04-02 23:50:11,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:11,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:50:12,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:12,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763883450] [2023-04-02 23:50:12,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763883450] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:12,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:12,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 23:50:12,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189767320] [2023-04-02 23:50:12,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:12,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 23:50:12,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:12,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 23:50:12,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:50:12,504 INFO L87 Difference]: Start difference. First operand has 616 states, 359 states have (on average 1.467966573816156) internal successors, (527), 388 states have internal predecessors, (527), 187 states have call successors, (187), 57 states have call predecessors, (187), 57 states have return successors, (187), 177 states have call predecessors, (187), 187 states have call successors, (187) Second operand has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2023-04-02 23:50:12,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:12,624 INFO L93 Difference]: Finished difference Result 513 states and 755 transitions. [2023-04-02 23:50:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 23:50:12,634 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 74 [2023-04-02 23:50:12,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:12,655 INFO L225 Difference]: With dead ends: 513 [2023-04-02 23:50:12,656 INFO L226 Difference]: Without dead ends: 479 [2023-04-02 23:50:12,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:50:12,665 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:12,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 673 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:50:12,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2023-04-02 23:50:12,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2023-04-02 23:50:12,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 300 states have (on average 1.5066666666666666) internal successors, (452), 321 states have internal predecessors, (452), 130 states have call successors, (130), 52 states have call predecessors, (130), 48 states have return successors, (122), 118 states have call predecessors, (122), 122 states have call successors, (122) [2023-04-02 23:50:12,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 704 transitions. [2023-04-02 23:50:12,767 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 704 transitions. Word has length 74 [2023-04-02 23:50:12,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:12,769 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 704 transitions. [2023-04-02 23:50:12,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2023-04-02 23:50:12,770 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 704 transitions. [2023-04-02 23:50:12,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-02 23:50:12,780 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:12,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:50:12,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 23:50:12,785 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:12,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:12,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1994471312, now seen corresponding path program 1 times [2023-04-02 23:50:12,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:12,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998675609] [2023-04-02 23:50:12,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:12,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:50:13,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:13,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998675609] [2023-04-02 23:50:13,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998675609] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:13,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:13,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 23:50:13,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631126101] [2023-04-02 23:50:13,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:13,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:50:13,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:13,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:50:13,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:50:13,630 INFO L87 Difference]: Start difference. First operand 479 states and 704 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 6 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-04-02 23:50:15,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:15,877 INFO L93 Difference]: Finished difference Result 1457 states and 2214 transitions. [2023-04-02 23:50:15,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:50:15,878 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 6 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 75 [2023-04-02 23:50:15,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:15,886 INFO L225 Difference]: With dead ends: 1457 [2023-04-02 23:50:15,886 INFO L226 Difference]: Without dead ends: 1020 [2023-04-02 23:50:15,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:50:15,891 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 2250 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 1839 mSolverCounterSat, 1027 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2339 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 2866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1027 IncrementalHoareTripleChecker+Valid, 1839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:15,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2339 Valid, 448 Invalid, 2866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1027 Valid, 1839 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-02 23:50:15,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2023-04-02 23:50:15,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 925. [2023-04-02 23:50:15,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 608 states have (on average 1.5394736842105263) internal successors, (936), 638 states have internal predecessors, (936), 235 states have call successors, (235), 82 states have call predecessors, (235), 81 states have return successors, (237), 214 states have call predecessors, (237), 227 states have call successors, (237) [2023-04-02 23:50:15,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1408 transitions. [2023-04-02 23:50:15,957 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1408 transitions. Word has length 75 [2023-04-02 23:50:15,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:15,957 INFO L495 AbstractCegarLoop]: Abstraction has 925 states and 1408 transitions. [2023-04-02 23:50:15,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 6 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-04-02 23:50:15,958 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1408 transitions. [2023-04-02 23:50:15,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-02 23:50:15,961 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:15,962 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-02 23:50:15,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 23:50:15,962 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:15,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:15,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1744493869, now seen corresponding path program 1 times [2023-04-02 23:50:15,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:15,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502884492] [2023-04-02 23:50:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:15,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:50:16,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:16,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502884492] [2023-04-02 23:50:16,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502884492] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:16,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:16,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:50:16,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129908321] [2023-04-02 23:50:16,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:16,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:50:16,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:16,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:50:16,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:50:16,537 INFO L87 Difference]: Start difference. First operand 925 states and 1408 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 5 states have call successors, (29), 4 states have call predecessors, (29), 4 states have return successors, (25), 5 states have call predecessors, (25), 4 states have call successors, (25) [2023-04-02 23:50:18,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:18,986 INFO L93 Difference]: Finished difference Result 2719 states and 4198 transitions. [2023-04-02 23:50:18,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:50:18,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 5 states have call successors, (29), 4 states have call predecessors, (29), 4 states have return successors, (25), 5 states have call predecessors, (25), 4 states have call successors, (25) Word has length 123 [2023-04-02 23:50:18,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:19,027 INFO L225 Difference]: With dead ends: 2719 [2023-04-02 23:50:19,028 INFO L226 Difference]: Without dead ends: 1837 [2023-04-02 23:50:19,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:50:19,033 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 1305 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 3536 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1402 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 4030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 3536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:19,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1402 Valid, 559 Invalid, 4030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 3536 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-02 23:50:19,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1837 states. [2023-04-02 23:50:19,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1837 to 1800. [2023-04-02 23:50:19,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1196 states have (on average 1.5451505016722409) internal successors, (1848), 1252 states have internal predecessors, (1848), 447 states have call successors, (447), 150 states have call predecessors, (447), 156 states have return successors, (477), 417 states have call predecessors, (477), 439 states have call successors, (477) [2023-04-02 23:50:19,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2772 transitions. [2023-04-02 23:50:19,167 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2772 transitions. Word has length 123 [2023-04-02 23:50:19,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:19,168 INFO L495 AbstractCegarLoop]: Abstraction has 1800 states and 2772 transitions. [2023-04-02 23:50:19,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 5 states have call successors, (29), 4 states have call predecessors, (29), 4 states have return successors, (25), 5 states have call predecessors, (25), 4 states have call successors, (25) [2023-04-02 23:50:19,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2772 transitions. [2023-04-02 23:50:19,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-04-02 23:50:19,172 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:19,172 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-02 23:50:19,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 23:50:19,173 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:19,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:19,173 INFO L85 PathProgramCache]: Analyzing trace with hash 373027514, now seen corresponding path program 1 times [2023-04-02 23:50:19,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:19,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461598397] [2023-04-02 23:50:19,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:19,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:19,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:50:19,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:19,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461598397] [2023-04-02 23:50:19,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461598397] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:19,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:19,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 23:50:19,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072193594] [2023-04-02 23:50:19,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:19,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 23:50:19,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:19,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 23:50:19,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:50:19,463 INFO L87 Difference]: Start difference. First operand 1800 states and 2772 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (26), 4 states have call predecessors, (26), 2 states have call successors, (26) [2023-04-02 23:50:19,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:19,952 INFO L93 Difference]: Finished difference Result 1850 states and 2849 transitions. [2023-04-02 23:50:19,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:19,953 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (26), 4 states have call predecessors, (26), 2 states have call successors, (26) Word has length 127 [2023-04-02 23:50:19,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:19,964 INFO L225 Difference]: With dead ends: 1850 [2023-04-02 23:50:19,965 INFO L226 Difference]: Without dead ends: 1833 [2023-04-02 23:50:19,966 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 [2023-04-02 23:50:19,967 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 720 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 1733 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:19,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 1733 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 23:50:19,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2023-04-02 23:50:20,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1806. [2023-04-02 23:50:20,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1202 states have (on average 1.5424292845257903) internal successors, (1854), 1258 states have internal predecessors, (1854), 447 states have call successors, (447), 150 states have call predecessors, (447), 156 states have return successors, (477), 417 states have call predecessors, (477), 439 states have call successors, (477) [2023-04-02 23:50:20,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2778 transitions. [2023-04-02 23:50:20,076 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2778 transitions. Word has length 127 [2023-04-02 23:50:20,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:20,078 INFO L495 AbstractCegarLoop]: Abstraction has 1806 states and 2778 transitions. [2023-04-02 23:50:20,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (26), 4 states have call predecessors, (26), 2 states have call successors, (26) [2023-04-02 23:50:20,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2778 transitions. [2023-04-02 23:50:20,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-02 23:50:20,082 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:20,082 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-02 23:50:20,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 23:50:20,083 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:20,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:20,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1506491285, now seen corresponding path program 1 times [2023-04-02 23:50:20,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:20,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148343139] [2023-04-02 23:50:20,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:20,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:50:20,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:20,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148343139] [2023-04-02 23:50:20,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148343139] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:20,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:20,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-02 23:50:20,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305635856] [2023-04-02 23:50:20,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:20,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 23:50:20,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:20,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 23:50:20,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:50:20,515 INFO L87 Difference]: Start difference. First operand 1806 states and 2778 transitions. Second operand has 9 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (27), 5 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-02 23:50:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:21,218 INFO L93 Difference]: Finished difference Result 1964 states and 2994 transitions. [2023-04-02 23:50:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 23:50:21,219 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (27), 5 states have call predecessors, (27), 2 states have call successors, (27) Word has length 132 [2023-04-02 23:50:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:21,230 INFO L225 Difference]: With dead ends: 1964 [2023-04-02 23:50:21,230 INFO L226 Difference]: Without dead ends: 1947 [2023-04-02 23:50:21,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-04-02 23:50:21,232 INFO L413 NwaCegarLoop]: 661 mSDtfsCounter, 704 mSDsluCounter, 3836 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 4497 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:21,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [707 Valid, 4497 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 23:50:21,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2023-04-02 23:50:21,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1896. [2023-04-02 23:50:21,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1260 states have (on average 1.5317460317460319) internal successors, (1930), 1316 states have internal predecessors, (1930), 467 states have call successors, (467), 162 states have call predecessors, (467), 168 states have return successors, (505), 437 states have call predecessors, (505), 459 states have call successors, (505) [2023-04-02 23:50:21,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2902 transitions. [2023-04-02 23:50:21,390 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2902 transitions. Word has length 132 [2023-04-02 23:50:21,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:21,391 INFO L495 AbstractCegarLoop]: Abstraction has 1896 states and 2902 transitions. [2023-04-02 23:50:21,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 3 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (27), 5 states have call predecessors, (27), 2 states have call successors, (27) [2023-04-02 23:50:21,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2902 transitions. [2023-04-02 23:50:21,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-04-02 23:50:21,399 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:21,399 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-04-02 23:50:21,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 23:50:21,400 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:21,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:21,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1059536064, now seen corresponding path program 1 times [2023-04-02 23:50:21,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:21,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050936954] [2023-04-02 23:50:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:21,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:50:22,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:22,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050936954] [2023-04-02 23:50:22,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050936954] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:22,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:22,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-02 23:50:22,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739925649] [2023-04-02 23:50:22,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:22,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 23:50:22,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:22,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 23:50:22,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:50:22,139 INFO L87 Difference]: Start difference. First operand 1896 states and 2902 transitions. Second operand has 12 states, 9 states have (on average 8.222222222222221) internal successors, (74), 10 states have internal predecessors, (74), 6 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (30), 8 states have call predecessors, (30), 5 states have call successors, (30) [2023-04-02 23:50:26,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:26,820 INFO L93 Difference]: Finished difference Result 4787 states and 7311 transitions. [2023-04-02 23:50:26,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-02 23:50:26,821 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 8.222222222222221) internal successors, (74), 10 states have internal predecessors, (74), 6 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (30), 8 states have call predecessors, (30), 5 states have call successors, (30) Word has length 146 [2023-04-02 23:50:26,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:26,838 INFO L225 Difference]: With dead ends: 4787 [2023-04-02 23:50:26,839 INFO L226 Difference]: Without dead ends: 2933 [2023-04-02 23:50:26,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2023-04-02 23:50:26,848 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 1317 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 9713 mSolverCounterSat, 644 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1369 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 10357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 644 IncrementalHoareTripleChecker+Valid, 9713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:26,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1369 Valid, 1308 Invalid, 10357 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [644 Valid, 9713 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-02 23:50:26,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2023-04-02 23:50:27,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 2884. [2023-04-02 23:50:27,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2884 states, 1918 states have (on average 1.5140771637122001) internal successors, (2904), 1992 states have internal predecessors, (2904), 695 states have call successors, (695), 249 states have call predecessors, (695), 270 states have return successors, (768), 672 states have call predecessors, (768), 687 states have call successors, (768) [2023-04-02 23:50:27,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2884 states to 2884 states and 4367 transitions. [2023-04-02 23:50:27,088 INFO L78 Accepts]: Start accepts. Automaton has 2884 states and 4367 transitions. Word has length 146 [2023-04-02 23:50:27,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:27,090 INFO L495 AbstractCegarLoop]: Abstraction has 2884 states and 4367 transitions. [2023-04-02 23:50:27,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 8.222222222222221) internal successors, (74), 10 states have internal predecessors, (74), 6 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (30), 8 states have call predecessors, (30), 5 states have call successors, (30) [2023-04-02 23:50:27,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2884 states and 4367 transitions. [2023-04-02 23:50:27,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-04-02 23:50:27,094 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:27,094 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1] [2023-04-02 23:50:27,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 23:50:27,095 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:27,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:27,096 INFO L85 PathProgramCache]: Analyzing trace with hash 846784662, now seen corresponding path program 1 times [2023-04-02 23:50:27,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:27,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613966532] [2023-04-02 23:50:27,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:27,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:50:27,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:27,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613966532] [2023-04-02 23:50:27,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613966532] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:27,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:27,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:50:27,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223940657] [2023-04-02 23:50:27,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:27,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:50:27,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:27,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:50:27,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:50:27,566 INFO L87 Difference]: Start difference. First operand 2884 states and 4367 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-04-02 23:50:29,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:29,237 INFO L93 Difference]: Finished difference Result 7464 states and 11560 transitions. [2023-04-02 23:50:29,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:29,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 147 [2023-04-02 23:50:29,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:29,267 INFO L225 Difference]: With dead ends: 7464 [2023-04-02 23:50:29,267 INFO L226 Difference]: Without dead ends: 4622 [2023-04-02 23:50:29,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:50:29,281 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 1306 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1392 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:29,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1392 Valid, 535 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 23:50:29,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4622 states. [2023-04-02 23:50:29,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4622 to 4472. [2023-04-02 23:50:29,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4472 states, 2964 states have (on average 1.5091093117408907) internal successors, (4473), 3093 states have internal predecessors, (4473), 1067 states have call successors, (1067), 381 states have call predecessors, (1067), 440 states have return successors, (1305), 1047 states have call predecessors, (1305), 1058 states have call successors, (1305) [2023-04-02 23:50:29,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4472 states to 4472 states and 6845 transitions. [2023-04-02 23:50:29,666 INFO L78 Accepts]: Start accepts. Automaton has 4472 states and 6845 transitions. Word has length 147 [2023-04-02 23:50:29,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:29,668 INFO L495 AbstractCegarLoop]: Abstraction has 4472 states and 6845 transitions. [2023-04-02 23:50:29,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-04-02 23:50:29,669 INFO L276 IsEmpty]: Start isEmpty. Operand 4472 states and 6845 transitions. [2023-04-02 23:50:29,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-04-02 23:50:29,673 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:29,673 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2023-04-02 23:50:29,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 23:50:29,673 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:29,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:29,674 INFO L85 PathProgramCache]: Analyzing trace with hash 478946533, now seen corresponding path program 1 times [2023-04-02 23:50:29,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:29,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303779991] [2023-04-02 23:50:29,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:29,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:50:30,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:30,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303779991] [2023-04-02 23:50:30,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303779991] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:30,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:30,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:50:30,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963218384] [2023-04-02 23:50:30,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:30,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:50:30,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:30,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:50:30,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:50:30,056 INFO L87 Difference]: Start difference. First operand 4472 states and 6845 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 4 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-04-02 23:50:31,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:31,884 INFO L93 Difference]: Finished difference Result 12282 states and 19506 transitions. [2023-04-02 23:50:31,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:31,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 4 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 148 [2023-04-02 23:50:31,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:31,936 INFO L225 Difference]: With dead ends: 12282 [2023-04-02 23:50:31,936 INFO L226 Difference]: Without dead ends: 7855 [2023-04-02 23:50:31,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:50:31,961 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 1303 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1389 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:31,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1389 Valid, 540 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 23:50:31,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7855 states. [2023-04-02 23:50:32,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7855 to 7642. [2023-04-02 23:50:32,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7642 states, 5060 states have (on average 1.5039525691699605) internal successors, (7610), 5306 states have internal predecessors, (7610), 1792 states have call successors, (1792), 645 states have call predecessors, (1792), 789 states have return successors, (2538), 1780 states have call predecessors, (2538), 1781 states have call successors, (2538) [2023-04-02 23:50:32,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7642 states to 7642 states and 11940 transitions. [2023-04-02 23:50:32,705 INFO L78 Accepts]: Start accepts. Automaton has 7642 states and 11940 transitions. Word has length 148 [2023-04-02 23:50:32,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:32,707 INFO L495 AbstractCegarLoop]: Abstraction has 7642 states and 11940 transitions. [2023-04-02 23:50:32,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 4 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-04-02 23:50:32,708 INFO L276 IsEmpty]: Start isEmpty. Operand 7642 states and 11940 transitions. [2023-04-02 23:50:32,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-02 23:50:32,712 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:32,712 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2023-04-02 23:50:32,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 23:50:32,713 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:32,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:32,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1960870328, now seen corresponding path program 1 times [2023-04-02 23:50:32,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:32,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715274537] [2023-04-02 23:50:32,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:32,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:50:33,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:33,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715274537] [2023-04-02 23:50:33,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715274537] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:33,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:33,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:50:33,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361084982] [2023-04-02 23:50:33,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:33,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:50:33,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:33,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:50:33,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:50:33,130 INFO L87 Difference]: Start difference. First operand 7642 states and 11940 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 4 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-04-02 23:50:35,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:35,359 INFO L93 Difference]: Finished difference Result 21950 states and 36440 transitions. [2023-04-02 23:50:35,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:35,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 4 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 149 [2023-04-02 23:50:35,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:35,466 INFO L225 Difference]: With dead ends: 21950 [2023-04-02 23:50:35,466 INFO L226 Difference]: Without dead ends: 14359 [2023-04-02 23:50:35,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:50:35,516 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 1300 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1386 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:35,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1386 Valid, 545 Invalid, 1559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-02 23:50:35,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14359 states. [2023-04-02 23:50:36,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14359 to 14021. [2023-04-02 23:50:36,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14021 states, 9267 states have (on average 1.4977878493579369) internal successors, (13880), 9761 states have internal predecessors, (13880), 3232 states have call successors, (3232), 1173 states have call predecessors, (3232), 1521 states have return successors, (5618), 3256 states have call predecessors, (5618), 3217 states have call successors, (5618) [2023-04-02 23:50:36,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14021 states to 14021 states and 22730 transitions. [2023-04-02 23:50:36,906 INFO L78 Accepts]: Start accepts. Automaton has 14021 states and 22730 transitions. Word has length 149 [2023-04-02 23:50:36,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:36,906 INFO L495 AbstractCegarLoop]: Abstraction has 14021 states and 22730 transitions. [2023-04-02 23:50:36,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 4 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-04-02 23:50:36,907 INFO L276 IsEmpty]: Start isEmpty. Operand 14021 states and 22730 transitions. [2023-04-02 23:50:36,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-04-02 23:50:36,912 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:36,912 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1] [2023-04-02 23:50:36,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 23:50:36,912 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:36,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:36,913 INFO L85 PathProgramCache]: Analyzing trace with hash 655871623, now seen corresponding path program 1 times [2023-04-02 23:50:36,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:36,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313805890] [2023-04-02 23:50:36,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:36,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:37,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:50:37,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:37,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313805890] [2023-04-02 23:50:37,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313805890] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:37,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:37,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:50:37,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755024198] [2023-04-02 23:50:37,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:37,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:50:37,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:37,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:50:37,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:50:37,335 INFO L87 Difference]: Start difference. First operand 14021 states and 22730 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 4 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-04-02 23:50:40,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:40,230 INFO L93 Difference]: Finished difference Result 41389 states and 73869 transitions. [2023-04-02 23:50:40,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:40,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 4 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 150 [2023-04-02 23:50:40,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:40,399 INFO L225 Difference]: With dead ends: 41389 [2023-04-02 23:50:40,400 INFO L226 Difference]: Without dead ends: 27431 [2023-04-02 23:50:40,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:50:40,473 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 1297 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:40,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1383 Valid, 550 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 23:50:40,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27431 states. [2023-04-02 23:50:42,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27431 to 26844. [2023-04-02 23:50:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26844 states, 17702 states have (on average 1.4910179640718564) internal successors, (26394), 18720 states have internal predecessors, (26394), 6088 states have call successors, (6088), 2229 states have call predecessors, (6088), 3053 states have return successors, (13794), 6224 states have call predecessors, (13794), 6065 states have call successors, (13794) [2023-04-02 23:50:43,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26844 states to 26844 states and 46276 transitions. [2023-04-02 23:50:43,083 INFO L78 Accepts]: Start accepts. Automaton has 26844 states and 46276 transitions. Word has length 150 [2023-04-02 23:50:43,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:43,084 INFO L495 AbstractCegarLoop]: Abstraction has 26844 states and 46276 transitions. [2023-04-02 23:50:43,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 4 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-04-02 23:50:43,084 INFO L276 IsEmpty]: Start isEmpty. Operand 26844 states and 46276 transitions. [2023-04-02 23:50:43,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-04-02 23:50:43,088 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:43,088 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1] [2023-04-02 23:50:43,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 23:50:43,089 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:43,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:43,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1144378662, now seen corresponding path program 1 times [2023-04-02 23:50:43,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:43,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938353086] [2023-04-02 23:50:43,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:43,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:43,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:50:43,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:43,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938353086] [2023-04-02 23:50:43,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938353086] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:43,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:50:43,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:50:43,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551421553] [2023-04-02 23:50:43,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:43,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:50:43,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:43,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:50:43,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:50:43,434 INFO L87 Difference]: Start difference. First operand 26844 states and 46276 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-04-02 23:50:48,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:48,237 INFO L93 Difference]: Finished difference Result 80554 states and 160860 transitions. [2023-04-02 23:50:48,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:50:48,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 151 [2023-04-02 23:50:48,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:48,673 INFO L225 Difference]: With dead ends: 80554 [2023-04-02 23:50:48,673 INFO L226 Difference]: Without dead ends: 53785 [2023-04-02 23:50:48,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:50:48,818 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 1298 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1384 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:50:48,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1384 Valid, 553 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 23:50:48,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53785 states. [2023-04-02 23:50:54,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53785 to 52143. [2023-04-02 23:50:54,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52143 states, 34425 states have (on average 1.489121278140886) internal successors, (51263), 36437 states have internal predecessors, (51263), 11743 states have call successors, (11743), 4331 states have call predecessors, (11743), 5974 states have return successors, (33801), 12024 states have call predecessors, (33801), 11705 states have call successors, (33801) [2023-04-02 23:50:54,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52143 states to 52143 states and 96807 transitions. [2023-04-02 23:50:54,688 INFO L78 Accepts]: Start accepts. Automaton has 52143 states and 96807 transitions. Word has length 151 [2023-04-02 23:50:54,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:50:54,688 INFO L495 AbstractCegarLoop]: Abstraction has 52143 states and 96807 transitions. [2023-04-02 23:50:54,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (34), 4 states have call predecessors, (34), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-04-02 23:50:54,689 INFO L276 IsEmpty]: Start isEmpty. Operand 52143 states and 96807 transitions. [2023-04-02 23:50:54,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2023-04-02 23:50:54,702 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:50:54,703 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:50:54,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 23:50:54,703 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:50:54,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:50:54,703 INFO L85 PathProgramCache]: Analyzing trace with hash 930915371, now seen corresponding path program 1 times [2023-04-02 23:50:54,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:50:54,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245343058] [2023-04-02 23:50:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:54,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:50:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2023-04-02 23:50:55,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:50:55,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245343058] [2023-04-02 23:50:55,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245343058] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:50:55,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615277089] [2023-04-02 23:50:55,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:50:55,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:50:55,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:50:55,067 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) [2023-04-02 23:50:55,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 23:50:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:50:55,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 4442 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 23:50:55,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:50:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2023-04-02 23:50:55,872 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:50:55,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615277089] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:50:55,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:50:55,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-02 23:50:55,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600278098] [2023-04-02 23:50:55,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:50:55,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:50:55,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:50:55,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:50:55,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:50:55,874 INFO L87 Difference]: Start difference. First operand 52143 states and 96807 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (44), 2 states have call predecessors, (44), 1 states have call successors, (44) [2023-04-02 23:50:59,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:50:59,644 INFO L93 Difference]: Finished difference Result 105400 states and 205759 transitions. [2023-04-02 23:50:59,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:50:59,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (44), 2 states have call predecessors, (44), 1 states have call successors, (44) Word has length 327 [2023-04-02 23:50:59,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:50:59,963 INFO L225 Difference]: With dead ends: 105400 [2023-04-02 23:50:59,964 INFO L226 Difference]: Without dead ends: 53299 [2023-04-02 23:51:00,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:51:00,176 INFO L413 NwaCegarLoop]: 667 mSDtfsCounter, 12 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:51:00,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1309 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:51:00,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53299 states. [2023-04-02 23:51:04,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53299 to 53277. [2023-04-02 23:51:04,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53277 states, 35418 states have (on average 1.481845389350048) internal successors, (52484), 37667 states have internal predecessors, (52484), 11743 states have call successors, (11743), 4331 states have call predecessors, (11743), 6115 states have return successors, (23846), 11928 states have call predecessors, (23846), 11705 states have call successors, (23846) [2023-04-02 23:51:04,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53277 states to 53277 states and 88073 transitions. [2023-04-02 23:51:04,539 INFO L78 Accepts]: Start accepts. Automaton has 53277 states and 88073 transitions. Word has length 327 [2023-04-02 23:51:04,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:51:04,540 INFO L495 AbstractCegarLoop]: Abstraction has 53277 states and 88073 transitions. [2023-04-02 23:51:04,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (44), 2 states have call predecessors, (44), 1 states have call successors, (44) [2023-04-02 23:51:04,540 INFO L276 IsEmpty]: Start isEmpty. Operand 53277 states and 88073 transitions. [2023-04-02 23:51:04,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2023-04-02 23:51:04,552 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:51:04,552 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:51:04,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 23:51:04,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 23:51:04,768 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:51:04,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:51:04,768 INFO L85 PathProgramCache]: Analyzing trace with hash 421943510, now seen corresponding path program 1 times [2023-04-02 23:51:04,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:51:04,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989782861] [2023-04-02 23:51:04,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:04,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:51:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2023-04-02 23:51:05,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:51:05,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989782861] [2023-04-02 23:51:05,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989782861] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:51:05,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654137250] [2023-04-02 23:51:05,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:05,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:51:05,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:51:05,209 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:51:05,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 23:51:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:06,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 4595 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:51:06,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:51:06,168 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2023-04-02 23:51:06,168 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:51:06,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654137250] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:51:06,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:51:06,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-02 23:51:06,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837015728] [2023-04-02 23:51:06,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:51:06,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:51:06,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:51:06,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:51:06,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:51:06,171 INFO L87 Difference]: Start difference. First operand 53277 states and 88073 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 2 states have call successors, (62), 2 states have call predecessors, (62), 3 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2023-04-02 23:51:10,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:51:10,139 INFO L93 Difference]: Finished difference Result 109085 states and 186366 transitions. [2023-04-02 23:51:10,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:51:10,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 2 states have call successors, (62), 2 states have call predecessors, (62), 3 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) Word has length 348 [2023-04-02 23:51:10,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:51:10,431 INFO L225 Difference]: With dead ends: 109085 [2023-04-02 23:51:10,431 INFO L226 Difference]: Without dead ends: 55851 [2023-04-02 23:51:10,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:51:10,646 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 213 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1770 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:51:10,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1770 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:51:10,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55851 states. [2023-04-02 23:51:14,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55851 to 55851. [2023-04-02 23:51:14,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55851 states, 37926 states have (on average 1.510889627168697) internal successors, (57302), 40175 states have internal predecessors, (57302), 11743 states have call successors, (11743), 4397 states have call predecessors, (11743), 6181 states have return successors, (23846), 11928 states have call predecessors, (23846), 11705 states have call successors, (23846) [2023-04-02 23:51:14,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55851 states to 55851 states and 92891 transitions. [2023-04-02 23:51:14,984 INFO L78 Accepts]: Start accepts. Automaton has 55851 states and 92891 transitions. Word has length 348 [2023-04-02 23:51:14,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:51:14,985 INFO L495 AbstractCegarLoop]: Abstraction has 55851 states and 92891 transitions. [2023-04-02 23:51:14,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 2 states have call successors, (62), 2 states have call predecessors, (62), 3 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2023-04-02 23:51:14,985 INFO L276 IsEmpty]: Start isEmpty. Operand 55851 states and 92891 transitions. [2023-04-02 23:51:14,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2023-04-02 23:51:14,994 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:51:14,994 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:51:15,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 23:51:15,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 23:51:15,210 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:51:15,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:51:15,211 INFO L85 PathProgramCache]: Analyzing trace with hash -252507581, now seen corresponding path program 1 times [2023-04-02 23:51:15,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:51:15,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468372341] [2023-04-02 23:51:15,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:15,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:51:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2023-04-02 23:51:15,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:51:15,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468372341] [2023-04-02 23:51:15,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468372341] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:51:15,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834643626] [2023-04-02 23:51:15,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:15,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:51:15,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:51:15,570 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:51:15,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 23:51:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:16,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 4446 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:51:16,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:51:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2023-04-02 23:51:16,295 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:51:16,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834643626] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:51:16,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:51:16,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-02 23:51:16,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941571910] [2023-04-02 23:51:16,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:51:16,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:51:16,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:51:16,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:51:16,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:51:16,297 INFO L87 Difference]: Start difference. First operand 55851 states and 92891 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (57), 2 states have call predecessors, (57), 3 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2023-04-02 23:51:20,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:51:20,289 INFO L93 Difference]: Finished difference Result 114233 states and 195934 transitions. [2023-04-02 23:51:20,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:51:20,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (57), 2 states have call predecessors, (57), 3 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) Word has length 335 [2023-04-02 23:51:20,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:51:20,743 INFO L225 Difference]: With dead ends: 114233 [2023-04-02 23:51:20,743 INFO L226 Difference]: Without dead ends: 58425 [2023-04-02 23:51:20,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:51:20,919 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 211 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1770 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:51:20,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1770 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:51:20,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58425 states. [2023-04-02 23:51:24,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58425 to 58425. [2023-04-02 23:51:24,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58425 states, 40434 states have (on average 1.5363308107038631) internal successors, (62120), 42683 states have internal predecessors, (62120), 11743 states have call successors, (11743), 4463 states have call predecessors, (11743), 6247 states have return successors, (23846), 11928 states have call predecessors, (23846), 11705 states have call successors, (23846) [2023-04-02 23:51:24,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58425 states to 58425 states and 97709 transitions. [2023-04-02 23:51:24,963 INFO L78 Accepts]: Start accepts. Automaton has 58425 states and 97709 transitions. Word has length 335 [2023-04-02 23:51:24,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:51:24,963 INFO L495 AbstractCegarLoop]: Abstraction has 58425 states and 97709 transitions. [2023-04-02 23:51:24,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (57), 2 states have call predecessors, (57), 3 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2023-04-02 23:51:24,964 INFO L276 IsEmpty]: Start isEmpty. Operand 58425 states and 97709 transitions. [2023-04-02 23:51:24,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2023-04-02 23:51:24,973 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:51:24,973 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 8, 8, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:51:24,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-02 23:51:25,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:51:25,187 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:51:25,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:51:25,188 INFO L85 PathProgramCache]: Analyzing trace with hash 2018520922, now seen corresponding path program 1 times [2023-04-02 23:51:25,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:51:25,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205053926] [2023-04-02 23:51:25,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:25,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:51:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-04-02 23:51:25,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:51:25,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205053926] [2023-04-02 23:51:25,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205053926] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:51:25,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936167345] [2023-04-02 23:51:25,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:25,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:51:25,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:51:25,518 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:51:25,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 23:51:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:26,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 4457 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:51:26,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:51:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2023-04-02 23:51:26,410 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:51:26,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936167345] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:51:26,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:51:26,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-02 23:51:26,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031869585] [2023-04-02 23:51:26,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:51:26,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:51:26,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:51:26,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:51:26,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:51:26,412 INFO L87 Difference]: Start difference. First operand 58425 states and 97709 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 2 states have call successors, (58), 2 states have call predecessors, (58), 3 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2023-04-02 23:51:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:51:30,260 INFO L93 Difference]: Finished difference Result 119381 states and 205502 transitions. [2023-04-02 23:51:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:51:30,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 2 states have call successors, (58), 2 states have call predecessors, (58), 3 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) Word has length 344 [2023-04-02 23:51:30,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:51:30,521 INFO L225 Difference]: With dead ends: 119381 [2023-04-02 23:51:30,521 INFO L226 Difference]: Without dead ends: 60999 [2023-04-02 23:51:30,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:51:30,680 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 209 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1770 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:51:30,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1770 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:51:30,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60999 states. [2023-04-02 23:51:34,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60999 to 60999. [2023-04-02 23:51:34,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60999 states, 42942 states have (on average 1.558800242187136) internal successors, (66938), 45191 states have internal predecessors, (66938), 11743 states have call successors, (11743), 4529 states have call predecessors, (11743), 6313 states have return successors, (23846), 11928 states have call predecessors, (23846), 11705 states have call successors, (23846) [2023-04-02 23:51:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60999 states to 60999 states and 102527 transitions. [2023-04-02 23:51:34,798 INFO L78 Accepts]: Start accepts. Automaton has 60999 states and 102527 transitions. Word has length 344 [2023-04-02 23:51:34,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:51:34,798 INFO L495 AbstractCegarLoop]: Abstraction has 60999 states and 102527 transitions. [2023-04-02 23:51:34,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 2 states have call successors, (58), 2 states have call predecessors, (58), 3 states have return successors, (54), 2 states have call predecessors, (54), 2 states have call successors, (54) [2023-04-02 23:51:34,798 INFO L276 IsEmpty]: Start isEmpty. Operand 60999 states and 102527 transitions. [2023-04-02 23:51:34,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2023-04-02 23:51:34,805 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:51:34,805 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 8, 6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:51:34,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 23:51:35,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-02 23:51:35,006 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:51:35,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:51:35,007 INFO L85 PathProgramCache]: Analyzing trace with hash 460651296, now seen corresponding path program 1 times [2023-04-02 23:51:35,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:51:35,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910472838] [2023-04-02 23:51:35,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:35,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:51:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2023-04-02 23:51:35,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:51:35,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910472838] [2023-04-02 23:51:35,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910472838] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:51:35,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414471225] [2023-04-02 23:51:35,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:35,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:51:35,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:51:35,552 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:51:35,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 23:51:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:36,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 4463 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:51:36,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:51:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 300 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2023-04-02 23:51:36,289 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:51:36,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414471225] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:51:36,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:51:36,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-02 23:51:36,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631897295] [2023-04-02 23:51:36,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:51:36,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:51:36,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:51:36,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:51:36,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:51:36,291 INFO L87 Difference]: Start difference. First operand 60999 states and 102527 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 2 states have call successors, (59), 2 states have call predecessors, (59), 3 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55)