/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_spec3_product18.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:51:15,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:51:15,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:51:15,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:51:15,558 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:51:15,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:51:15,563 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:51:15,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:51:15,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:51:15,571 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:51:15,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:51:15,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:51:15,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:51:15,577 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:51:15,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:51:15,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:51:15,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:51:15,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:51:15,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:51:15,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:51:15,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:51:15,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:51:15,589 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:51:15,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:51:15,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:51:15,598 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:51:15,598 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:51:15,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:51:15,599 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:51:15,599 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:51:15,600 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:51:15,600 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:51:15,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:51:15,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:51:15,602 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:51:15,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:51:15,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:51:15,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:51:15,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:51:15,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:51:15,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:51:15,605 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 23:51:15,639 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:51:15,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:51:15,639 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:51:15,640 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:51:15,640 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:51:15,640 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:51:15,640 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:51:15,641 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:51:15,641 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:51:15,641 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:51:15,641 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:51:15,641 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:51:15,642 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:51:15,642 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:51:15,642 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:51:15,642 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:51:15,642 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:51:15,642 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:51:15,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:51:15,643 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:51:15,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:51:15,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:51:15,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:51:15,643 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:51:15,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:51:15,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:51:15,643 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:51:15,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:51:15,644 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:51:15,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:51:15,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:51:15,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:51:15,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:51:15,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:51:15,645 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:51:15,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:51:15,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:51:15,645 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:51:15,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:51:15,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:51:15,645 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:51:15,645 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:51:15,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:51:15,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:51:15,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:51:15,883 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:51:15,883 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:51:15,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2023-04-02 23:51:16,861 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:51:17,134 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:51:17,134 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec3_product18.cil.c [2023-04-02 23:51:17,147 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da4435001/65e95c4ac1fd48f085104c3023b1d011/FLAG73fafc98f [2023-04-02 23:51:17,158 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da4435001/65e95c4ac1fd48f085104c3023b1d011 [2023-04-02 23:51:17,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:51:17,161 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:51:17,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:51:17,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:51:17,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:51:17,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:51:17" (1/1) ... [2023-04-02 23:51:17,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13ddf92e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:51:17, skipping insertion in model container [2023-04-02 23:51:17,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:51:17" (1/1) ... [2023-04-02 23:51:17,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:51:17,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:51:17,534 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_spec3_product18.cil.c[32398,32411] [2023-04-02 23:51:17,630 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:51:17,649 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:51:17,695 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_spec3_product18.cil.c[32398,32411] [2023-04-02 23:51:17,724 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:51:17,745 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:51:17,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:51:17 WrapperNode [2023-04-02 23:51:17,745 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:51:17,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:51:17,746 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:51:17,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:51:17,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:51:17" (1/1) ... [2023-04-02 23:51:17,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:51:17" (1/1) ... [2023-04-02 23:51:17,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:51:17" (1/1) ... [2023-04-02 23:51:17,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:51:17" (1/1) ... [2023-04-02 23:51:17,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:51:17" (1/1) ... [2023-04-02 23:51:17,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:51:17" (1/1) ... [2023-04-02 23:51:17,873 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:51:17" (1/1) ... [2023-04-02 23:51:17,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:51:17" (1/1) ... [2023-04-02 23:51:17,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:51:17,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:51:17,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:51:17,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:51:17,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:51:17" (1/1) ... [2023-04-02 23:51:17,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:51:17,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:51:17,923 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 23:51:17,939 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 23:51:17,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:51:17,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:51:17,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-04-02 23:51:17,967 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:51:17,968 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-04-02 23:51:17,968 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-04-02 23:51:17,968 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-04-02 23:51:17,968 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-04-02 23:51:17,968 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-04-02 23:51:17,968 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-04-02 23:51:17,968 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-04-02 23:51:17,968 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-04-02 23:51:17,968 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-04-02 23:51:17,968 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-04-02 23:51:17,968 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-04-02 23:51:17,968 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-04-02 23:51:17,968 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-04-02 23:51:17,969 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-04-02 23:51:17,969 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-04-02 23:51:17,969 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-04-02 23:51:17,969 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-04-02 23:51:17,969 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-04-02 23:51:17,969 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-04-02 23:51:17,969 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-04-02 23:51:17,969 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-04-02 23:51:17,969 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-04-02 23:51:17,969 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-04-02 23:51:17,969 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-04-02 23:51:17,969 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-04-02 23:51:17,969 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-04-02 23:51:17,969 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-04-02 23:51:17,969 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-04-02 23:51:17,969 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-04-02 23:51:17,969 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-04-02 23:51:17,970 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-04-02 23:51:17,970 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-04-02 23:51:17,970 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-04-02 23:51:17,970 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-04-02 23:51:17,970 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:51:17,970 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-04-02 23:51:17,970 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-04-02 23:51:17,970 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-04-02 23:51:17,970 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-04-02 23:51:17,971 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-04-02 23:51:17,971 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-04-02 23:51:17,971 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-04-02 23:51:17,971 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-04-02 23:51:17,972 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-04-02 23:51:17,972 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-04-02 23:51:17,972 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-04-02 23:51:17,972 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-04-02 23:51:17,972 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-04-02 23:51:17,972 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-04-02 23:51:17,972 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-04-02 23:51:17,973 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-04-02 23:51:17,973 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-04-02 23:51:17,973 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-04-02 23:51:17,973 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-04-02 23:51:17,973 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-04-02 23:51:17,973 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-04-02 23:51:17,974 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-04-02 23:51:17,974 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-04-02 23:51:17,974 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__weight [2023-04-02 23:51:17,974 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-04-02 23:51:17,974 INFO L138 BoogieDeclarations]: Found implementation of procedure printState__wrappee__weight [2023-04-02 23:51:17,974 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-04-02 23:51:17,974 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-04-02 23:51:17,974 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-04-02 23:51:17,974 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-04-02 23:51:17,974 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-04-02 23:51:17,974 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__1 [2023-04-02 23:51:17,974 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification3_spec__2 [2023-04-02 23:51:17,974 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-04-02 23:51:17,975 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-04-02 23:51:17,975 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-04-02 23:51:17,975 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:51:17,975 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:51:17,975 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:51:17,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:51:17,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:51:17,975 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-04-02 23:51:17,975 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-04-02 23:51:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-04-02 23:51:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-04-02 23:51:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 23:51:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 23:51:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-04-02 23:51:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 23:51:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 23:51:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:51:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 23:51:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-04-02 23:51:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:51:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-04-02 23:51:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-04-02 23:51:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:51:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-04-02 23:51:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-04-02 23:51:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-04-02 23:51:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-04-02 23:51:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-04-02 23:51:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-04-02 23:51:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-04-02 23:51:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-04-02 23:51:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-04-02 23:51:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-04-02 23:51:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-04-02 23:51:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 23:51:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-04-02 23:51:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-04-02 23:51:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-04-02 23:51:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-04-02 23:51:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-04-02 23:51:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-04-02 23:51:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-04-02 23:51:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-04-02 23:51:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-04-02 23:51:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-04-02 23:51:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-04-02 23:51:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-04-02 23:51:17,980 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-04-02 23:51:17,980 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-04-02 23:51:17,982 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-04-02 23:51:17,982 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-04-02 23:51:17,985 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-04-02 23:51:17,985 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-04-02 23:51:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-04-02 23:51:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-04-02 23:51:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-04-02 23:51:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-04-02 23:51:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-04-02 23:51:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:51:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-04-02 23:51:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-04-02 23:51:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-04-02 23:51:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-04-02 23:51:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-04-02 23:51:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-04-02 23:51:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-04-02 23:51:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-04-02 23:51:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-04-02 23:51:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-04-02 23:51:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-04-02 23:51:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-04-02 23:51:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-04-02 23:51:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-04-02 23:51:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-04-02 23:51:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-04-02 23:51:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-04-02 23:51:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-04-02 23:51:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-04-02 23:51:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-04-02 23:51:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-04-02 23:51:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-04-02 23:51:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-04-02 23:51:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__weight [2023-04-02 23:51:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__1 [2023-04-02 23:51:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification3_spec__2 [2023-04-02 23:51:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure printState__wrappee__weight [2023-04-02 23:51:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-04-02 23:51:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-04-02 23:51:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-04-02 23:51:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:51:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:51:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:51:18,201 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:51:18,204 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:51:19,405 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:51:20,025 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:51:20,025 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-04-02 23:51:20,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:51:20 BoogieIcfgContainer [2023-04-02 23:51:20,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:51:20,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:51:20,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:51:20,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:51:20,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:51:17" (1/3) ... [2023-04-02 23:51:20,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d6e4d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:51:20, skipping insertion in model container [2023-04-02 23:51:20,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:51:17" (2/3) ... [2023-04-02 23:51:20,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d6e4d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:51:20, skipping insertion in model container [2023-04-02 23:51:20,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:51:20" (3/3) ... [2023-04-02 23:51:20,036 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product18.cil.c [2023-04-02 23:51:20,050 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:51:20,050 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:51:20,097 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:51:20,101 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;@38756947, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:51:20,101 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:51:20,107 INFO L276 IsEmpty]: Start isEmpty. Operand has 583 states, 340 states have (on average 1.488235294117647) internal successors, (506), 365 states have internal predecessors, (506), 179 states have call successors, (179), 50 states have call predecessors, (179), 50 states have return successors, (179), 172 states have call predecessors, (179), 179 states have call successors, (179) [2023-04-02 23:51:20,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-02 23:51:20,115 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:51:20,116 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 23:51:20,117 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:51:20,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:51:20,120 INFO L85 PathProgramCache]: Analyzing trace with hash -67132853, now seen corresponding path program 1 times [2023-04-02 23:51:20,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:51:20,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124084333] [2023-04-02 23:51:20,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:20,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:51:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:51:20,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:51:20,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124084333] [2023-04-02 23:51:20,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124084333] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:51:20,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:51:20,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 23:51:20,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331093591] [2023-04-02 23:51:20,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:51:20,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:51:20,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:51:20,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:51:20,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:51:20,998 INFO L87 Difference]: Start difference. First operand has 583 states, 340 states have (on average 1.488235294117647) internal successors, (506), 365 states have internal predecessors, (506), 179 states have call successors, (179), 50 states have call predecessors, (179), 50 states have return successors, (179), 172 states have call predecessors, (179), 179 states have call successors, (179) Second operand has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-04-02 23:51:23,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:51:23,033 INFO L93 Difference]: Finished difference Result 1630 states and 2514 transitions. [2023-04-02 23:51:23,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 23:51:23,040 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 80 [2023-04-02 23:51:23,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:51:23,060 INFO L225 Difference]: With dead ends: 1630 [2023-04-02 23:51:23,060 INFO L226 Difference]: Without dead ends: 1175 [2023-04-02 23:51:23,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-04-02 23:51:23,069 INFO L413 NwaCegarLoop]: 1039 mSDtfsCounter, 1220 mSDsluCounter, 3044 mSDsCounter, 0 mSdLazyCounter, 3278 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1239 SdHoareTripleChecker+Valid, 4083 SdHoareTripleChecker+Invalid, 3361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 3278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-02 23:51:23,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1239 Valid, 4083 Invalid, 3361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 3278 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-02 23:51:23,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2023-04-02 23:51:23,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1165. [2023-04-02 23:51:23,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 742 states have (on average 1.494609164420485) internal successors, (1109), 792 states have internal predecessors, (1109), 314 states have call successors, (314), 114 states have call predecessors, (314), 108 states have return successors, (327), 297 states have call predecessors, (327), 306 states have call successors, (327) [2023-04-02 23:51:23,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1750 transitions. [2023-04-02 23:51:23,211 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1750 transitions. Word has length 80 [2023-04-02 23:51:23,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:51:23,211 INFO L495 AbstractCegarLoop]: Abstraction has 1165 states and 1750 transitions. [2023-04-02 23:51:23,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-04-02 23:51:23,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1750 transitions. [2023-04-02 23:51:23,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-02 23:51:23,214 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:51:23,214 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 23:51:23,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 23:51:23,214 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:51:23,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:51:23,215 INFO L85 PathProgramCache]: Analyzing trace with hash -913864786, now seen corresponding path program 1 times [2023-04-02 23:51:23,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:51:23,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713606320] [2023-04-02 23:51:23,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:23,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:51:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:51:23,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:51:23,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713606320] [2023-04-02 23:51:23,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713606320] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:51:23,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:51:23,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 23:51:23,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31367825] [2023-04-02 23:51:23,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:51:23,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:51:23,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:51:23,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:51:23,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:51:23,619 INFO L87 Difference]: Start difference. First operand 1165 states and 1750 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-04-02 23:51:23,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:51:23,886 INFO L93 Difference]: Finished difference Result 3423 states and 5209 transitions. [2023-04-02 23:51:23,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:51:23,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 81 [2023-04-02 23:51:23,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:51:23,900 INFO L225 Difference]: With dead ends: 3423 [2023-04-02 23:51:23,900 INFO L226 Difference]: Without dead ends: 2291 [2023-04-02 23:51:23,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 23:51:23,906 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 631 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:51:23,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 1232 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:51:23,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2023-04-02 23:51:24,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2167. [2023-04-02 23:51:24,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 1430 states have (on average 1.5111888111888112) internal successors, (2161), 1507 states have internal predecessors, (2161), 545 states have call successors, (545), 198 states have call predecessors, (545), 191 states have return successors, (598), 500 states have call predecessors, (598), 534 states have call successors, (598) [2023-04-02 23:51:24,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 3304 transitions. [2023-04-02 23:51:24,028 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 3304 transitions. Word has length 81 [2023-04-02 23:51:24,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:51:24,029 INFO L495 AbstractCegarLoop]: Abstraction has 2167 states and 3304 transitions. [2023-04-02 23:51:24,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-04-02 23:51:24,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 3304 transitions. [2023-04-02 23:51:24,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-02 23:51:24,033 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:51:24,033 INFO L195 NwaCegarLoop]: trace histogram [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 23:51:24,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 23:51:24,034 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:51:24,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:51:24,034 INFO L85 PathProgramCache]: Analyzing trace with hash -893000983, now seen corresponding path program 1 times [2023-04-02 23:51:24,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:51:24,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411602952] [2023-04-02 23:51:24,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:24,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:51:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:51:24,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:51:24,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411602952] [2023-04-02 23:51:24,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411602952] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:51:24,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:51:24,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-02 23:51:24,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661376490] [2023-04-02 23:51:24,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:51:24,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 23:51:24,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:51:24,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 23:51:24,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-04-02 23:51:24,551 INFO L87 Difference]: Start difference. First operand 2167 states and 3304 transitions. Second operand has 10 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 4 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-02 23:51:25,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:51:25,270 INFO L93 Difference]: Finished difference Result 4893 states and 7479 transitions. [2023-04-02 23:51:25,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 23:51:25,271 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 4 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) Word has length 112 [2023-04-02 23:51:25,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:51:25,288 INFO L225 Difference]: With dead ends: 4893 [2023-04-02 23:51:25,288 INFO L226 Difference]: Without dead ends: 2757 [2023-04-02 23:51:25,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-04-02 23:51:25,303 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 479 mSDsluCounter, 4693 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 5452 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 23:51:25,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 5452 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 23:51:25,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2023-04-02 23:51:25,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2745. [2023-04-02 23:51:25,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2745 states, 1790 states have (on average 1.4754189944134077) internal successors, (2641), 1863 states have internal predecessors, (2641), 683 states have call successors, (683), 272 states have call predecessors, (683), 271 states have return successors, (815), 650 states have call predecessors, (815), 668 states have call successors, (815) [2023-04-02 23:51:25,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2745 states to 2745 states and 4139 transitions. [2023-04-02 23:51:25,453 INFO L78 Accepts]: Start accepts. Automaton has 2745 states and 4139 transitions. Word has length 112 [2023-04-02 23:51:25,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:51:25,455 INFO L495 AbstractCegarLoop]: Abstraction has 2745 states and 4139 transitions. [2023-04-02 23:51:25,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 4 states have call successors, (30), 4 states have call predecessors, (30), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2023-04-02 23:51:25,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2745 states and 4139 transitions. [2023-04-02 23:51:25,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-02 23:51:25,457 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:51:25,458 INFO L195 NwaCegarLoop]: trace histogram [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 23:51:25,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 23:51:25,458 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:51:25,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:51:25,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1111681789, now seen corresponding path program 1 times [2023-04-02 23:51:25,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:51:25,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792918285] [2023-04-02 23:51:25,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:25,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:51:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 23:51:25,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:51:25,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792918285] [2023-04-02 23:51:25,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792918285] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:51:25,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:51:25,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 23:51:25,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003029357] [2023-04-02 23:51:25,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:51:25,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 23:51:25,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:51:25,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 23:51:25,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 23:51:25,828 INFO L87 Difference]: Start difference. First operand 2745 states and 4139 transitions. Second operand has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-02 23:51:27,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:51:27,173 INFO L93 Difference]: Finished difference Result 8108 states and 12664 transitions. [2023-04-02 23:51:27,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 23:51:27,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 113 [2023-04-02 23:51:27,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:51:27,208 INFO L225 Difference]: With dead ends: 8108 [2023-04-02 23:51:27,208 INFO L226 Difference]: Without dead ends: 5394 [2023-04-02 23:51:27,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-04-02 23:51:27,232 INFO L413 NwaCegarLoop]: 1256 mSDtfsCounter, 1251 mSDsluCounter, 3766 mSDsCounter, 0 mSdLazyCounter, 2188 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 5022 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:51:27,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1273 Valid, 5022 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2188 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 23:51:27,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5394 states. [2023-04-02 23:51:27,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5394 to 5287. [2023-04-02 23:51:27,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5287 states, 3435 states have (on average 1.4614264919941775) internal successors, (5020), 3612 states have internal predecessors, (5020), 1310 states have call successors, (1310), 533 states have call predecessors, (1310), 541 states have return successors, (1765), 1243 states have call predecessors, (1765), 1286 states have call successors, (1765) [2023-04-02 23:51:27,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5287 states to 5287 states and 8095 transitions. [2023-04-02 23:51:27,532 INFO L78 Accepts]: Start accepts. Automaton has 5287 states and 8095 transitions. Word has length 113 [2023-04-02 23:51:27,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:51:27,533 INFO L495 AbstractCegarLoop]: Abstraction has 5287 states and 8095 transitions. [2023-04-02 23:51:27,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2023-04-02 23:51:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 5287 states and 8095 transitions. [2023-04-02 23:51:27,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-02 23:51:27,534 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:51:27,534 INFO L195 NwaCegarLoop]: trace histogram [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 23:51:27,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 23:51:27,535 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:51:27,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:51:27,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1076316518, now seen corresponding path program 1 times [2023-04-02 23:51:27,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:51:27,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605306508] [2023-04-02 23:51:27,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:27,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:51:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 23:51:27,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:51:27,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605306508] [2023-04-02 23:51:27,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605306508] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:51:27,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590184693] [2023-04-02 23:51:27,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:27,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:51:27,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:51:27,916 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 23:51:27,932 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 23:51:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:28,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 2893 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 23:51:28,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:51:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:51:28,502 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:51:28,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590184693] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:51:28,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:51:28,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2023-04-02 23:51:28,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367874082] [2023-04-02 23:51:28,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:51:28,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:51:28,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:51:28,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:51:28,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:51:28,503 INFO L87 Difference]: Start difference. First operand 5287 states and 8095 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-02 23:51:28,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:51:28,909 INFO L93 Difference]: Finished difference Result 14687 states and 23998 transitions. [2023-04-02 23:51:28,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:51:28,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 112 [2023-04-02 23:51:28,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:51:28,971 INFO L225 Difference]: With dead ends: 14687 [2023-04-02 23:51:28,971 INFO L226 Difference]: Without dead ends: 9431 [2023-04-02 23:51:29,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:51:29,009 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 597 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:51:29,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 1150 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:51:29,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9431 states. [2023-04-02 23:51:29,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9431 to 8931. [2023-04-02 23:51:29,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8931 states, 5838 states have (on average 1.472250770811922) internal successors, (8595), 6172 states have internal predecessors, (8595), 2163 states have call successors, (2163), 876 states have call predecessors, (2163), 929 states have return successors, (3137), 2068 states have call predecessors, (3137), 2139 states have call successors, (3137) [2023-04-02 23:51:29,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8931 states to 8931 states and 13895 transitions. [2023-04-02 23:51:29,461 INFO L78 Accepts]: Start accepts. Automaton has 8931 states and 13895 transitions. Word has length 112 [2023-04-02 23:51:29,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:51:29,461 INFO L495 AbstractCegarLoop]: Abstraction has 8931 states and 13895 transitions. [2023-04-02 23:51:29,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-02 23:51:29,461 INFO L276 IsEmpty]: Start isEmpty. Operand 8931 states and 13895 transitions. [2023-04-02 23:51:29,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-02 23:51:29,464 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:51:29,464 INFO L195 NwaCegarLoop]: trace histogram [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 23:51:29,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 23:51:29,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:51:29,673 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:51:29,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:51:29,674 INFO L85 PathProgramCache]: Analyzing trace with hash 263378799, now seen corresponding path program 1 times [2023-04-02 23:51:29,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:51:29,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345462458] [2023-04-02 23:51:29,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:29,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:51:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:30,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 23:51:30,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:51:30,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345462458] [2023-04-02 23:51:30,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345462458] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:51:30,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43864040] [2023-04-02 23:51:30,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:30,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:51:30,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:51:30,115 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 23:51:30,123 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 23:51:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:30,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 2894 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-02 23:51:30,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:51:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:51:30,640 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:51:30,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43864040] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:51:30,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:51:30,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2023-04-02 23:51:30,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363349188] [2023-04-02 23:51:30,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:51:30,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 23:51:30,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:51:30,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 23:51:30,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:51:30,641 INFO L87 Difference]: Start difference. First operand 8931 states and 13895 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-02 23:51:31,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:51:31,241 INFO L93 Difference]: Finished difference Result 19685 states and 31776 transitions. [2023-04-02 23:51:31,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 23:51:31,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 113 [2023-04-02 23:51:31,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:51:31,304 INFO L225 Difference]: With dead ends: 19685 [2023-04-02 23:51:31,305 INFO L226 Difference]: Without dead ends: 10785 [2023-04-02 23:51:31,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-04-02 23:51:31,353 INFO L413 NwaCegarLoop]: 665 mSDtfsCounter, 593 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:51:31,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 1184 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:51:31,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10785 states. [2023-04-02 23:51:31,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10785 to 10513. [2023-04-02 23:51:31,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10513 states, 6886 states have (on average 1.4692128957304675) internal successors, (10117), 7282 states have internal predecessors, (10117), 2519 states have call successors, (2519), 1029 states have call predecessors, (2519), 1107 states have return successors, (3737), 2419 states have call predecessors, (3737), 2495 states have call successors, (3737) [2023-04-02 23:51:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10513 states to 10513 states and 16373 transitions. [2023-04-02 23:51:31,870 INFO L78 Accepts]: Start accepts. Automaton has 10513 states and 16373 transitions. Word has length 113 [2023-04-02 23:51:31,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:51:31,870 INFO L495 AbstractCegarLoop]: Abstraction has 10513 states and 16373 transitions. [2023-04-02 23:51:31,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-04-02 23:51:31,871 INFO L276 IsEmpty]: Start isEmpty. Operand 10513 states and 16373 transitions. [2023-04-02 23:51:31,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-04-02 23:51:31,873 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:51:31,873 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 23:51:31,900 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 23:51:32,081 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,SelfDestructingSolverStorable5 [2023-04-02 23:51:32,084 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:51:32,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:51:32,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1871329602, now seen corresponding path program 1 times [2023-04-02 23:51:32,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:51:32,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105320714] [2023-04-02 23:51:32,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:32,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:51:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-02 23:51:32,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:51:32,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105320714] [2023-04-02 23:51:32,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105320714] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:51:32,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:51:32,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-02 23:51:32,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575136301] [2023-04-02 23:51:32,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:51:32,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 23:51:32,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:51:32,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 23:51:32,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-02 23:51:32,617 INFO L87 Difference]: Start difference. First operand 10513 states and 16373 transitions. Second operand has 10 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-02 23:51:34,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:51:34,907 INFO L93 Difference]: Finished difference Result 34014 states and 55817 transitions. [2023-04-02 23:51:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 23:51:34,908 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) Word has length 119 [2023-04-02 23:51:34,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:51:35,031 INFO L225 Difference]: With dead ends: 34014 [2023-04-02 23:51:35,031 INFO L226 Difference]: Without dead ends: 23532 [2023-04-02 23:51:35,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-04-02 23:51:35,087 INFO L413 NwaCegarLoop]: 1272 mSDtfsCounter, 1242 mSDsluCounter, 7776 mSDsCounter, 0 mSdLazyCounter, 2569 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 9048 SdHoareTripleChecker+Invalid, 2612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 23:51:35,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1265 Valid, 9048 Invalid, 2612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2569 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 23:51:35,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23532 states. [2023-04-02 23:51:36,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23532 to 23268. [2023-04-02 23:51:36,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23268 states, 15332 states have (on average 1.4670623532481086) internal successors, (22493), 16292 states have internal predecessors, (22493), 5483 states have call successors, (5483), 2259 states have call predecessors, (5483), 2452 states have return successors, (9387), 5210 states have call predecessors, (9387), 5441 states have call successors, (9387) [2023-04-02 23:51:36,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23268 states to 23268 states and 37363 transitions. [2023-04-02 23:51:36,386 INFO L78 Accepts]: Start accepts. Automaton has 23268 states and 37363 transitions. Word has length 119 [2023-04-02 23:51:36,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:51:36,387 INFO L495 AbstractCegarLoop]: Abstraction has 23268 states and 37363 transitions. [2023-04-02 23:51:36,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 3 states have call successors, (31), 3 states have call predecessors, (31), 5 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) [2023-04-02 23:51:36,387 INFO L276 IsEmpty]: Start isEmpty. Operand 23268 states and 37363 transitions. [2023-04-02 23:51:36,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-02 23:51:36,389 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:51:36,389 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-04-02 23:51:36,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 23:51:36,390 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:51:36,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:51:36,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1698146109, now seen corresponding path program 1 times [2023-04-02 23:51:36,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:51:36,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474076687] [2023-04-02 23:51:36,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:36,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:51:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 23:51:36,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:51:36,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474076687] [2023-04-02 23:51:36,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474076687] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:51:36,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:51:36,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 23:51:36,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610375326] [2023-04-02 23:51:36,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:51:36,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:51:36,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:51:36,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:51:36,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:51:36,652 INFO L87 Difference]: Start difference. First operand 23268 states and 37363 transitions. Second operand has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-02 23:51:37,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:51:37,783 INFO L93 Difference]: Finished difference Result 45965 states and 75954 transitions. [2023-04-02 23:51:37,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 23:51:37,784 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 125 [2023-04-02 23:51:37,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:51:37,940 INFO L225 Difference]: With dead ends: 45965 [2023-04-02 23:51:37,941 INFO L226 Difference]: Without dead ends: 25371 [2023-04-02 23:51:38,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 23:51:38,049 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 33 mSDsluCounter, 3778 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 4409 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:51:38,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 4409 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:51:38,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25371 states. [2023-04-02 23:51:39,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25371 to 23578. [2023-04-02 23:51:39,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23578 states, 15543 states have (on average 1.4607218683651804) internal successors, (22704), 16546 states have internal predecessors, (22704), 5483 states have call successors, (5483), 2259 states have call predecessors, (5483), 2551 states have return successors, (9486), 5266 states have call predecessors, (9486), 5441 states have call successors, (9486) [2023-04-02 23:51:39,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23578 states to 23578 states and 37673 transitions. [2023-04-02 23:51:39,410 INFO L78 Accepts]: Start accepts. Automaton has 23578 states and 37673 transitions. Word has length 125 [2023-04-02 23:51:39,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:51:39,411 INFO L495 AbstractCegarLoop]: Abstraction has 23578 states and 37673 transitions. [2023-04-02 23:51:39,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-04-02 23:51:39,411 INFO L276 IsEmpty]: Start isEmpty. Operand 23578 states and 37673 transitions. [2023-04-02 23:51:39,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-04-02 23:51:39,415 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:51:39,415 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-04-02 23:51:39,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 23:51:39,415 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:51:39,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:51:39,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1362406106, now seen corresponding path program 1 times [2023-04-02 23:51:39,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:51:39,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96375411] [2023-04-02 23:51:39,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:39,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:51:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 23:51:39,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:51:39,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96375411] [2023-04-02 23:51:39,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96375411] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:51:39,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:51:39,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-02 23:51:39,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945479199] [2023-04-02 23:51:39,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:51:39,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 23:51:39,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:51:39,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 23:51:39,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-04-02 23:51:39,852 INFO L87 Difference]: Start difference. First operand 23578 states and 37673 transitions. Second operand has 11 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 7 states have call successors, (33), 4 states have call predecessors, (33), 5 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) [2023-04-02 23:51:44,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:51:44,093 INFO L93 Difference]: Finished difference Result 50734 states and 85724 transitions. [2023-04-02 23:51:44,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 23:51:44,094 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 7 states have call successors, (33), 4 states have call predecessors, (33), 5 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) Word has length 129 [2023-04-02 23:51:44,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:51:44,248 INFO L225 Difference]: With dead ends: 50734 [2023-04-02 23:51:44,248 INFO L226 Difference]: Without dead ends: 30168 [2023-04-02 23:51:44,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-04-02 23:51:44,343 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 1811 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 5848 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1904 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 6511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 5848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-02 23:51:44,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1904 Valid, 1380 Invalid, 6511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 5848 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-02 23:51:44,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30168 states. [2023-04-02 23:51:45,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30168 to 28246. [2023-04-02 23:51:45,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28246 states, 19121 states have (on average 1.4964175513832958) internal successors, (28613), 20288 states have internal predecessors, (28613), 6243 states have call successors, (6243), 2505 states have call predecessors, (6243), 2881 states have return successors, (10654), 5918 states have call predecessors, (10654), 6201 states have call successors, (10654) [2023-04-02 23:51:46,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28246 states to 28246 states and 45510 transitions. [2023-04-02 23:51:46,043 INFO L78 Accepts]: Start accepts. Automaton has 28246 states and 45510 transitions. Word has length 129 [2023-04-02 23:51:46,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:51:46,043 INFO L495 AbstractCegarLoop]: Abstraction has 28246 states and 45510 transitions. [2023-04-02 23:51:46,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.6) internal successors, (66), 10 states have internal predecessors, (66), 7 states have call successors, (33), 4 states have call predecessors, (33), 5 states have return successors, (26), 8 states have call predecessors, (26), 7 states have call successors, (26) [2023-04-02 23:51:46,044 INFO L276 IsEmpty]: Start isEmpty. Operand 28246 states and 45510 transitions. [2023-04-02 23:51:46,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-04-02 23:51:46,047 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:51:46,047 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-04-02 23:51:46,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 23:51:46,048 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:51:46,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:51:46,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1649499044, now seen corresponding path program 1 times [2023-04-02 23:51:46,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:51:46,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619044477] [2023-04-02 23:51:46,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:51:46,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:51:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:51:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 23:51:46,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:51:46,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619044477] [2023-04-02 23:51:46,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619044477] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:51:46,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:51:46,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-04-02 23:51:46,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010398001] [2023-04-02 23:51:46,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:51:46,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 23:51:46,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:51:46,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 23:51:46,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2023-04-02 23:51:46,637 INFO L87 Difference]: Start difference. First operand 28246 states and 45510 transitions. Second operand has 16 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 7 states have call successors, (33), 5 states have call predecessors, (33), 7 states have return successors, (26), 8 states have call predecessors, (26), 6 states have call successors, (26) [2023-04-02 23:51:56,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:51:56,495 INFO L93 Difference]: Finished difference Result 119223 states and 216982 transitions. [2023-04-02 23:51:56,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-04-02 23:51:56,496 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 7 states have call successors, (33), 5 states have call predecessors, (33), 7 states have return successors, (26), 8 states have call predecessors, (26), 6 states have call successors, (26) Word has length 132 [2023-04-02 23:51:56,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:51:57,212 INFO L225 Difference]: With dead ends: 119223 [2023-04-02 23:51:57,212 INFO L226 Difference]: Without dead ends: 94885 [2023-04-02 23:51:57,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=480, Invalid=2490, Unknown=0, NotChecked=0, Total=2970 [2023-04-02 23:51:57,448 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 4989 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 8329 mSolverCounterSat, 2605 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4995 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 10934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 2605 IncrementalHoareTripleChecker+Valid, 8329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-02 23:51:57,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4995 Valid, 1590 Invalid, 10934 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [2605 Valid, 8329 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-04-02 23:51:57,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94885 states. [2023-04-02 23:52:02,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94885 to 88978. [2023-04-02 23:52:02,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88978 states, 61309 states have (on average 1.5151282845911693) internal successors, (92891), 64654 states have internal predecessors, (92891), 18503 states have call successors, (18503), 7899 states have call predecessors, (18503), 9165 states have return successors, (41904), 17652 states have call predecessors, (41904), 18399 states have call successors, (41904) [2023-04-02 23:52:03,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88978 states to 88978 states and 153298 transitions. [2023-04-02 23:52:03,154 INFO L78 Accepts]: Start accepts. Automaton has 88978 states and 153298 transitions. Word has length 132 [2023-04-02 23:52:03,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:52:03,155 INFO L495 AbstractCegarLoop]: Abstraction has 88978 states and 153298 transitions. [2023-04-02 23:52:03,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 7 states have call successors, (33), 5 states have call predecessors, (33), 7 states have return successors, (26), 8 states have call predecessors, (26), 6 states have call successors, (26) [2023-04-02 23:52:03,155 INFO L276 IsEmpty]: Start isEmpty. Operand 88978 states and 153298 transitions. [2023-04-02 23:52:03,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-04-02 23:52:03,160 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:52:03,160 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:52:03,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 23:52:03,160 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:52:03,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:52:03,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1626554664, now seen corresponding path program 1 times [2023-04-02 23:52:03,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:52:03,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060294594] [2023-04-02 23:52:03,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:52:03,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:52:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:52:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-02 23:52:03,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:52:03,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060294594] [2023-04-02 23:52:03,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060294594] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:52:03,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814186009] [2023-04-02 23:52:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:52:03,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:52:03,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:52:03,669 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 23:52:03,712 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 23:52:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:52:04,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 3035 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:52:04,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:52:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 23:52:04,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:52:04,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814186009] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:52:04,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:52:04,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-04-02 23:52:04,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623850937] [2023-04-02 23:52:04,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:52:04,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:52:04,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:52:04,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:52:04,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-02 23:52:04,193 INFO L87 Difference]: Start difference. First operand 88978 states and 153298 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (31), 3 states have call predecessors, (31), 2 states have call successors, (31) [2023-04-02 23:52:10,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:52:10,307 INFO L93 Difference]: Finished difference Result 177238 states and 320846 transitions. [2023-04-02 23:52:10,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:52:10,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (31), 3 states have call predecessors, (31), 2 states have call successors, (31) Word has length 156 [2023-04-02 23:52:10,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:52:10,986 INFO L225 Difference]: With dead ends: 177238 [2023-04-02 23:52:10,986 INFO L226 Difference]: Without dead ends: 91032 [2023-04-02 23:52:11,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-04-02 23:52:11,593 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 2 mSDsluCounter, 1874 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2507 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:52:11,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2507 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:52:11,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91032 states. [2023-04-02 23:52:16,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91032 to 90126. [2023-04-02 23:52:16,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90126 states, 62017 states have (on average 1.5084089846332458) internal successors, (93547), 65565 states have internal predecessors, (93547), 18575 states have call successors, (18575), 7890 states have call predecessors, (18575), 9533 states have return successors, (43903), 17898 states have call predecessors, (43903), 18471 states have call successors, (43903) [2023-04-02 23:52:17,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90126 states to 90126 states and 156025 transitions. [2023-04-02 23:52:17,507 INFO L78 Accepts]: Start accepts. Automaton has 90126 states and 156025 transitions. Word has length 156 [2023-04-02 23:52:17,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:52:17,507 INFO L495 AbstractCegarLoop]: Abstraction has 90126 states and 156025 transitions. [2023-04-02 23:52:17,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (31), 3 states have call predecessors, (31), 2 states have call successors, (31) [2023-04-02 23:52:17,507 INFO L276 IsEmpty]: Start isEmpty. Operand 90126 states and 156025 transitions. [2023-04-02 23:52:17,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-04-02 23:52:17,513 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:52:17,513 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:52:17,521 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 23:52:17,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:52:17,722 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:52:17,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:52:17,722 INFO L85 PathProgramCache]: Analyzing trace with hash -301678578, now seen corresponding path program 1 times [2023-04-02 23:52:17,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:52:17,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316420195] [2023-04-02 23:52:17,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:52:17,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:52:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:52:18,077 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-02 23:52:18,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:52:18,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316420195] [2023-04-02 23:52:18,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316420195] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:52:18,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290854800] [2023-04-02 23:52:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:52:18,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:52:18,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:52:18,079 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 23:52:18,081 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 23:52:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:52:18,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 3041 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:52:18,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:52:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:52:18,543 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:52:18,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290854800] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:52:18,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:52:18,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-04-02 23:52:18,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177471821] [2023-04-02 23:52:18,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:52:18,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:52:18,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:52:18,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:52:18,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:52:18,545 INFO L87 Difference]: Start difference. First operand 90126 states and 156025 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:52:25,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:52:25,158 INFO L93 Difference]: Finished difference Result 190895 states and 342466 transitions. [2023-04-02 23:52:25,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 23:52:25,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 167 [2023-04-02 23:52:25,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:52:25,852 INFO L225 Difference]: With dead ends: 190895 [2023-04-02 23:52:25,852 INFO L226 Difference]: Without dead ends: 83909 [2023-04-02 23:52:26,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-04-02 23:52:26,438 INFO L413 NwaCegarLoop]: 677 mSDtfsCounter, 235 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 1777 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:52:26,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 1777 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:52:26,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83909 states. [2023-04-02 23:52:30,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83909 to 83885. [2023-04-02 23:52:30,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83885 states, 57075 states have (on average 1.4606745510293473) internal successors, (83368), 60550 states have internal predecessors, (83368), 17621 states have call successors, (17621), 7645 states have call predecessors, (17621), 9188 states have return successors, (39607), 16917 states have call predecessors, (39607), 17533 states have call successors, (39607) [2023-04-02 23:52:31,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83885 states to 83885 states and 140596 transitions. [2023-04-02 23:52:31,623 INFO L78 Accepts]: Start accepts. Automaton has 83885 states and 140596 transitions. Word has length 167 [2023-04-02 23:52:31,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:52:31,623 INFO L495 AbstractCegarLoop]: Abstraction has 83885 states and 140596 transitions. [2023-04-02 23:52:31,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:52:31,624 INFO L276 IsEmpty]: Start isEmpty. Operand 83885 states and 140596 transitions. [2023-04-02 23:52:31,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-04-02 23:52:31,631 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:52:31,631 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:52:31,643 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 23:52:31,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:52:31,840 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:52:31,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:52:31,840 INFO L85 PathProgramCache]: Analyzing trace with hash 45138206, now seen corresponding path program 1 times [2023-04-02 23:52:31,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:52:31,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824970779] [2023-04-02 23:52:31,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:52:31,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:52:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:52:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-02 23:52:32,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:52:32,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824970779] [2023-04-02 23:52:32,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824970779] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 23:52:32,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380291273] [2023-04-02 23:52:32,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:52:32,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:52:32,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:52:32,287 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 23:52:32,289 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 23:52:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:52:32,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 3045 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 23:52:32,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:52:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-02 23:52:32,767 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:52:32,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380291273] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:52:32,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:52:32,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-04-02 23:52:32,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629770057] [2023-04-02 23:52:32,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:52:32,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:52:32,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:52:32,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:52:32,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:52:32,769 INFO L87 Difference]: Start difference. First operand 83885 states and 140596 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-04-02 23:52:39,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:52:39,054 INFO L93 Difference]: Finished difference Result 181537 states and 317696 transitions. [2023-04-02 23:52:39,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 23:52:39,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 171 [2023-04-02 23:52:39,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted.