/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 IntervalDomain -i ../sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:34:12,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:34:12,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:34:12,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:34:12,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:34:12,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:34:12,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:34:12,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:34:12,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:34:12,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:34:12,560 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:34:12,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:34:12,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:34:12,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:34:12,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:34:12,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:34:12,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:34:12,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:34:12,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:34:12,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:34:12,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:34:12,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:34:12,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:34:12,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:34:12,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:34:12,580 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:34:12,580 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:34:12,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:34:12,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:34:12,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:34:12,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:34:12,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:34:12,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:34:12,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:34:12,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:34:12,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:34:12,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:34:12,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:34:12,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:34:12,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:34:12,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:34:12,587 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 [2023-03-31 23:34:12,609 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:34:12,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:34:12,609 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:34:12,610 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:34:12,610 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:34:12,610 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:34:12,610 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:34:12,610 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:34:12,611 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:34:12,611 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:34:12,611 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:34:12,611 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:34:12,612 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:34:12,612 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:34:12,612 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:34:12,612 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:34:12,612 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:34:12,612 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:34:12,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:34:12,613 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:34:12,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:34:12,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:34:12,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:34:12,613 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:34:12,613 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:34:12,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:34:12,613 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:34:12,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:34:12,613 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:34:12,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:34:12,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:34:12,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:34:12,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:34:12,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:34:12,614 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:34:12,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:34:12,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:34:12,615 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:34:12,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:34:12,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:34:12,615 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:34:12,615 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:34:12,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:34:12,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:34:12,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:34:12,828 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:34:12,829 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:34:12,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c [2023-03-31 23:34:13,927 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:34:14,184 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:34:14,184 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c [2023-03-31 23:34:14,211 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec4875359/dc2b200eb2e5486dac62c1ad4211ca14/FLAG6ac2c00da [2023-03-31 23:34:14,224 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec4875359/dc2b200eb2e5486dac62c1ad4211ca14 [2023-03-31 23:34:14,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:34:14,227 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:34:14,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:34:14,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:34:14,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:34:14,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:34:14" (1/1) ... [2023-03-31 23:34:14,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52dc10f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:34:14, skipping insertion in model container [2023-03-31 23:34:14,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:34:14" (1/1) ... [2023-03-31 23:34:14,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:34:14,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:34:14,589 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c[40071,40084] [2023-03-31 23:34:14,634 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:34:14,643 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:34:14,719 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c[40071,40084] [2023-03-31 23:34:14,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:34:14,789 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:34:14,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:34:14 WrapperNode [2023-03-31 23:34:14,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:34:14,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:34:14,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:34:14,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:34:14,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:34:14" (1/1) ... [2023-03-31 23:34:14,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:34:14" (1/1) ... [2023-03-31 23:34:14,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:34:14" (1/1) ... [2023-03-31 23:34:14,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:34:14" (1/1) ... [2023-03-31 23:34:14,880 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:34:14" (1/1) ... [2023-03-31 23:34:14,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:34:14" (1/1) ... [2023-03-31 23:34:14,909 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:34:14" (1/1) ... [2023-03-31 23:34:14,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:34:14" (1/1) ... [2023-03-31 23:34:14,943 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:34:14,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:34:14,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:34:14,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:34:14,945 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:34:14" (1/1) ... [2023-03-31 23:34:14,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:34:14,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:34:14,984 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) [2023-03-31 23:34:15,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:34:15,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:34:15,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~X~int~TO~int [2023-03-31 23:34:15,012 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:34:15,013 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2023-03-31 23:34:15,013 INFO L138 BoogieDeclarations]: Found implementation of procedure select_features [2023-03-31 23:34:15,013 INFO L138 BoogieDeclarations]: Found implementation of procedure select_helpers [2023-03-31 23:34:15,013 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_product [2023-03-31 23:34:15,013 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_set [2023-03-31 23:34:15,013 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_free [2023-03-31 23:34:15,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__exception__cf_handler_reset [2023-03-31 23:34:15,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__error_stack_mgt [2023-03-31 23:34:15,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_arg [2023-03-31 23:34:15,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac__get_this_argtype [2023-03-31 23:34:15,014 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2023-03-31 23:34:15,014 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-03-31 23:34:15,014 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-03-31 23:34:15,015 INFO L138 BoogieDeclarations]: Found implementation of procedure callOnFloor [2023-03-31 23:34:15,015 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-03-31 23:34:15,015 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-03-31 23:34:15,015 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-03-31 23:34:15,015 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-03-31 23:34:15,015 INFO L138 BoogieDeclarations]: Found implementation of procedure spec1 [2023-03-31 23:34:15,066 INFO L138 BoogieDeclarations]: Found implementation of procedure spec14 [2023-03-31 23:34:15,066 INFO L138 BoogieDeclarations]: Found implementation of procedure get_nondetMinMax07 [2023-03-31 23:34:15,066 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-03-31 23:34:15,066 INFO L138 BoogieDeclarations]: Found implementation of procedure aliceCall [2023-03-31 23:34:15,066 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-03-31 23:34:15,066 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckCall [2023-03-31 23:34:15,066 INFO L138 BoogieDeclarations]: Found implementation of procedure monicaCall [2023-03-31 23:34:15,067 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-03-31 23:34:15,067 INFO L138 BoogieDeclarations]: Found implementation of procedure threeTS [2023-03-31 23:34:15,067 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-03-31 23:34:15,067 INFO L138 BoogieDeclarations]: Found implementation of procedure randomSequenceOfActions [2023-03-31 23:34:15,067 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest_Simple [2023-03-31 23:34:15,067 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification1 [2023-03-31 23:34:15,067 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification2 [2023-03-31 23:34:15,067 INFO L138 BoogieDeclarations]: Found implementation of procedure Specification3 [2023-03-31 23:34:15,067 INFO L138 BoogieDeclarations]: Found implementation of procedure setup [2023-03-31 23:34:15,067 INFO L138 BoogieDeclarations]: Found implementation of procedure runTest [2023-03-31 23:34:15,067 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:34:15,067 INFO L138 BoogieDeclarations]: Found implementation of procedure test [2023-03-31 23:34:15,067 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-03-31 23:34:15,068 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-03-31 23:34:15,068 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-03-31 23:34:15,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__1 [2023-03-31 23:34:15,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__2 [2023-03-31 23:34:15,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__3 [2023-03-31 23:34:15,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __utac_acc__Specification2_spec__4 [2023-03-31 23:34:15,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-03-31 23:34:15,069 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2023-03-31 23:34:15,069 INFO L138 BoogieDeclarations]: Found implementation of procedure initBottomUp [2023-03-31 23:34:15,069 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-03-31 23:34:15,069 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator__wrappee__base [2023-03-31 23:34:15,069 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-03-31 23:34:15,070 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator__wrappee__base [2023-03-31 23:34:15,070 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-03-31 23:34:15,070 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-03-31 23:34:15,070 INFO L138 BoogieDeclarations]: Found implementation of procedure resetFloorButton [2023-03-31 23:34:15,070 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-03-31 23:34:15,071 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-03-31 23:34:15,071 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-03-31 23:34:15,071 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-03-31 23:34:15,071 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-03-31 23:34:15,071 INFO L138 BoogieDeclarations]: Found implementation of procedure anyStopRequested [2023-03-31 23:34:15,071 INFO L138 BoogieDeclarations]: Found implementation of procedure isIdle [2023-03-31 23:34:15,071 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2023-03-31 23:34:15,071 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-03-31 23:34:15,071 INFO L138 BoogieDeclarations]: Found implementation of procedure isAnyLiftButtonPressed [2023-03-31 23:34:15,071 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-03-31 23:34:15,072 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-03-31 23:34:15,072 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor [2023-03-31 23:34:15,072 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-03-31 23:34:15,072 INFO L138 BoogieDeclarations]: Found implementation of procedure processWaitingOnFloor [2023-03-31 23:34:15,072 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-03-31 23:34:15,072 INFO L138 BoogieDeclarations]: Found implementation of procedure printState [2023-03-31 23:34:15,072 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-03-31 23:34:15,072 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:34:15,072 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:34:15,072 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:34:15,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:34:15,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:34:15,072 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2023-03-31 23:34:15,073 INFO L130 BoogieDeclarations]: Found specification of procedure select_features [2023-03-31 23:34:15,073 INFO L130 BoogieDeclarations]: Found specification of procedure select_helpers [2023-03-31 23:34:15,073 INFO L130 BoogieDeclarations]: Found specification of procedure valid_product [2023-03-31 23:34:15,073 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 23:34:15,073 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 23:34:15,073 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_set [2023-03-31 23:34:15,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 23:34:15,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 23:34:15,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:34:15,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 23:34:15,074 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_free [2023-03-31 23:34:15,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:34:15,074 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__exception__cf_handler_reset [2023-03-31 23:34:15,074 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~X~int~TO~int [2023-03-31 23:34:15,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:34:15,074 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__error_stack_mgt [2023-03-31 23:34:15,074 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_arg [2023-03-31 23:34:15,074 INFO L130 BoogieDeclarations]: Found specification of procedure __utac__get_this_argtype [2023-03-31 23:34:15,074 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-03-31 23:34:15,074 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-03-31 23:34:15,074 INFO L130 BoogieDeclarations]: Found specification of procedure callOnFloor [2023-03-31 23:34:15,074 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-03-31 23:34:15,074 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-03-31 23:34:15,074 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-03-31 23:34:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-03-31 23:34:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2023-03-31 23:34:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-03-31 23:34:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-03-31 23:34:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-03-31 23:34:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure printState [2023-03-31 23:34:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2023-03-31 23:34:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure initBottomUp [2023-03-31 23:34:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure spec1 [2023-03-31 23:34:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure spec14 [2023-03-31 23:34:15,076 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 23:34:15,001 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 [2023-03-31 23:34:15,076 INFO L130 BoogieDeclarations]: Found specification of procedure get_nondetMinMax07 [2023-03-31 23:34:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-03-31 23:34:15,077 INFO L130 BoogieDeclarations]: Found specification of procedure aliceCall [2023-03-31 23:34:15,078 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-03-31 23:34:15,079 INFO L130 BoogieDeclarations]: Found specification of procedure chuckCall [2023-03-31 23:34:15,079 INFO L130 BoogieDeclarations]: Found specification of procedure monicaCall [2023-03-31 23:34:15,083 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-03-31 23:34:15,083 INFO L130 BoogieDeclarations]: Found specification of procedure threeTS [2023-03-31 23:34:15,083 INFO L130 BoogieDeclarations]: Found specification of procedure isIdle [2023-03-31 23:34:15,083 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-03-31 23:34:15,083 INFO L130 BoogieDeclarations]: Found specification of procedure randomSequenceOfActions [2023-03-31 23:34:15,083 INFO L130 BoogieDeclarations]: Found specification of procedure runTest_Simple [2023-03-31 23:34:15,098 INFO L130 BoogieDeclarations]: Found specification of procedure Specification1 [2023-03-31 23:34:15,098 INFO L130 BoogieDeclarations]: Found specification of procedure Specification2 [2023-03-31 23:34:15,098 INFO L130 BoogieDeclarations]: Found specification of procedure Specification3 [2023-03-31 23:34:15,098 INFO L130 BoogieDeclarations]: Found specification of procedure setup [2023-03-31 23:34:15,098 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__1 [2023-03-31 23:34:15,098 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__4 [2023-03-31 23:34:15,098 INFO L130 BoogieDeclarations]: Found specification of procedure test [2023-03-31 23:34:15,098 INFO L130 BoogieDeclarations]: Found specification of procedure runTest [2023-03-31 23:34:15,098 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:34:15,098 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-03-31 23:34:15,099 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-03-31 23:34:15,099 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-03-31 23:34:15,099 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-03-31 23:34:15,099 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-03-31 23:34:15,099 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__2 [2023-03-31 23:34:15,099 INFO L130 BoogieDeclarations]: Found specification of procedure __utac_acc__Specification2_spec__3 [2023-03-31 23:34:15,099 INFO L130 BoogieDeclarations]: Found specification of procedure printf [2023-03-31 23:34:15,099 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-03-31 23:34:15,099 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-03-31 23:34:15,099 INFO L130 BoogieDeclarations]: Found specification of procedure isAnyLiftButtonPressed [2023-03-31 23:34:15,099 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-03-31 23:34:15,099 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator__wrappee__base [2023-03-31 23:34:15,099 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator__wrappee__base [2023-03-31 23:34:15,100 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-03-31 23:34:15,100 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-03-31 23:34:15,100 INFO L130 BoogieDeclarations]: Found specification of procedure resetFloorButton [2023-03-31 23:34:15,100 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-03-31 23:34:15,100 INFO L130 BoogieDeclarations]: Found specification of procedure anyStopRequested [2023-03-31 23:34:15,100 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2023-03-31 23:34:15,100 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-03-31 23:34:15,100 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-03-31 23:34:15,100 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2023-03-31 23:34:15,100 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor [2023-03-31 23:34:15,100 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-03-31 23:34:15,100 INFO L130 BoogieDeclarations]: Found specification of procedure processWaitingOnFloor [2023-03-31 23:34:15,100 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-03-31 23:34:15,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:34:15,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:34:15,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:34:15,356 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:34:15,373 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:34:16,393 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:34:17,185 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:34:17,185 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-03-31 23:34:17,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:34:17 BoogieIcfgContainer [2023-03-31 23:34:17,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:34:17,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:34:17,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:34:17,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:34:17,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:34:14" (1/3) ... [2023-03-31 23:34:17,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3afda563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:34:17, skipping insertion in model container [2023-03-31 23:34:17,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:34:14" (2/3) ... [2023-03-31 23:34:17,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3afda563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:34:17, skipping insertion in model container [2023-03-31 23:34:17,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:34:17" (3/3) ... [2023-03-31 23:34:17,193 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product21.cil.c [2023-03-31 23:34:17,205 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:34:17,205 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:34:17,254 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:34:17,258 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;@4a781546, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:34:17,258 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:34:17,263 INFO L276 IsEmpty]: Start isEmpty. Operand has 567 states, 332 states have (on average 1.4909638554216869) internal successors, (495), 359 states have internal predecessors, (495), 172 states have call successors, (172), 50 states have call predecessors, (172), 50 states have return successors, (172), 163 states have call predecessors, (172), 172 states have call successors, (172) [2023-03-31 23:34:17,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-03-31 23:34:17,291 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:17,291 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] [2023-03-31 23:34:17,292 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:17,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:17,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1491857156, now seen corresponding path program 1 times [2023-03-31 23:34:17,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:17,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289350391] [2023-03-31 23:34:17,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:17,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:34:18,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:18,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289350391] [2023-03-31 23:34:18,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289350391] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:18,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:18,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-03-31 23:34:18,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659578931] [2023-03-31 23:34:18,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:18,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 23:34:18,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:18,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 23:34:18,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:34:18,338 INFO L87 Difference]: Start difference. First operand has 567 states, 332 states have (on average 1.4909638554216869) internal successors, (495), 359 states have internal predecessors, (495), 172 states have call successors, (172), 50 states have call predecessors, (172), 50 states have return successors, (172), 163 states have call predecessors, (172), 172 states have call successors, (172) Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (22), 7 states have call predecessors, (22), 5 states have call successors, (22) [2023-03-31 23:34:21,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:21,058 INFO L93 Difference]: Finished difference Result 1394 states and 2144 transitions. [2023-03-31 23:34:21,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-31 23:34:21,060 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (22), 7 states have call predecessors, (22), 5 states have call successors, (22) Word has length 106 [2023-03-31 23:34:21,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:21,089 INFO L225 Difference]: With dead ends: 1394 [2023-03-31 23:34:21,089 INFO L226 Difference]: Without dead ends: 975 [2023-03-31 23:34:21,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-03-31 23:34:21,096 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 1808 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 5259 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1883 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 5834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 5259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:21,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1883 Valid, 938 Invalid, 5834 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [575 Valid, 5259 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-03-31 23:34:21,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2023-03-31 23:34:21,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 943. [2023-03-31 23:34:21,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 627 states have (on average 1.5598086124401913) internal successors, (978), 658 states have internal predecessors, (978), 232 states have call successors, (232), 82 states have call predecessors, (232), 83 states have return successors, (236), 226 states have call predecessors, (236), 224 states have call successors, (236) [2023-03-31 23:34:21,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1446 transitions. [2023-03-31 23:34:21,219 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1446 transitions. Word has length 106 [2023-03-31 23:34:21,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:21,220 INFO L495 AbstractCegarLoop]: Abstraction has 943 states and 1446 transitions. [2023-03-31 23:34:21,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 6 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (22), 7 states have call predecessors, (22), 5 states have call successors, (22) [2023-03-31 23:34:21,220 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1446 transitions. [2023-03-31 23:34:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-03-31 23:34:21,225 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:21,225 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] [2023-03-31 23:34:21,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 23:34:21,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:21,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:21,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2011034527, now seen corresponding path program 1 times [2023-03-31 23:34:21,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:21,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552061675] [2023-03-31 23:34:21,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:21,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:34:21,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:21,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552061675] [2023-03-31 23:34:21,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552061675] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:21,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:21,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 23:34:21,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285583699] [2023-03-31 23:34:21,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:21,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:34:21,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:21,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:34:21,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:34:21,466 INFO L87 Difference]: Start difference. First operand 943 states and 1446 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-03-31 23:34:21,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:21,623 INFO L93 Difference]: Finished difference Result 1509 states and 2328 transitions. [2023-03-31 23:34:21,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:34:21,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 112 [2023-03-31 23:34:21,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:21,628 INFO L225 Difference]: With dead ends: 1509 [2023-03-31 23:34:21,628 INFO L226 Difference]: Without dead ends: 980 [2023-03-31 23:34:21,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:34:21,631 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 6 mSDsluCounter, 3053 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3673 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:21,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3673 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:34:21,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2023-03-31 23:34:21,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 964. [2023-03-31 23:34:21,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 642 states have (on average 1.5467289719626167) internal successors, (993), 673 states have internal predecessors, (993), 232 states have call successors, (232), 82 states have call predecessors, (232), 89 states have return successors, (251), 232 states have call predecessors, (251), 224 states have call successors, (251) [2023-03-31 23:34:21,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1476 transitions. [2023-03-31 23:34:21,673 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1476 transitions. Word has length 112 [2023-03-31 23:34:21,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:21,673 INFO L495 AbstractCegarLoop]: Abstraction has 964 states and 1476 transitions. [2023-03-31 23:34:21,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-03-31 23:34:21,673 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1476 transitions. [2023-03-31 23:34:21,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-03-31 23:34:21,676 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:21,676 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] [2023-03-31 23:34:21,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 23:34:21,676 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:21,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:21,677 INFO L85 PathProgramCache]: Analyzing trace with hash -817311297, now seen corresponding path program 1 times [2023-03-31 23:34:21,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:21,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549289320] [2023-03-31 23:34:21,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:21,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:34:21,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:21,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549289320] [2023-03-31 23:34:21,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549289320] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:21,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:21,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 23:34:21,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712909045] [2023-03-31 23:34:21,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:21,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:34:21,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:21,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:34:21,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:34:21,919 INFO L87 Difference]: Start difference. First operand 964 states and 1476 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-03-31 23:34:22,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:22,073 INFO L93 Difference]: Finished difference Result 1538 states and 2366 transitions. [2023-03-31 23:34:22,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:34:22,073 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 112 [2023-03-31 23:34:22,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:22,078 INFO L225 Difference]: With dead ends: 1538 [2023-03-31 23:34:22,078 INFO L226 Difference]: Without dead ends: 995 [2023-03-31 23:34:22,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:34:22,080 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 6 mSDsluCounter, 3053 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3673 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:22,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3673 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:34:22,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2023-03-31 23:34:22,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 967. [2023-03-31 23:34:22,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 645 states have (on average 1.544186046511628) internal successors, (996), 673 states have internal predecessors, (996), 232 states have call successors, (232), 82 states have call predecessors, (232), 89 states have return successors, (251), 235 states have call predecessors, (251), 224 states have call successors, (251) [2023-03-31 23:34:22,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1479 transitions. [2023-03-31 23:34:22,127 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1479 transitions. Word has length 112 [2023-03-31 23:34:22,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:22,127 INFO L495 AbstractCegarLoop]: Abstraction has 967 states and 1479 transitions. [2023-03-31 23:34:22,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-03-31 23:34:22,128 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1479 transitions. [2023-03-31 23:34:22,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-03-31 23:34:22,130 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:22,130 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] [2023-03-31 23:34:22,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 23:34:22,130 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:22,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:22,130 INFO L85 PathProgramCache]: Analyzing trace with hash -523679998, now seen corresponding path program 1 times [2023-03-31 23:34:22,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:22,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316917361] [2023-03-31 23:34:22,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:22,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:22,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:34:22,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:22,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316917361] [2023-03-31 23:34:22,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316917361] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:22,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:22,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 23:34:22,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027165454] [2023-03-31 23:34:22,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:22,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:34:22,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:22,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:34:22,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:34:22,333 INFO L87 Difference]: Start difference. First operand 967 states and 1479 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-03-31 23:34:22,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:22,485 INFO L93 Difference]: Finished difference Result 1543 states and 2371 transitions. [2023-03-31 23:34:22,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 23:34:22,485 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 111 [2023-03-31 23:34:22,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:22,489 INFO L225 Difference]: With dead ends: 1543 [2023-03-31 23:34:22,490 INFO L226 Difference]: Without dead ends: 998 [2023-03-31 23:34:22,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:34:22,492 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 7 mSDsluCounter, 3034 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 3649 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:22,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 3649 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:34:22,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2023-03-31 23:34:22,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 970. [2023-03-31 23:34:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 648 states have (on average 1.5416666666666667) internal successors, (999), 673 states have internal predecessors, (999), 232 states have call successors, (232), 82 states have call predecessors, (232), 89 states have return successors, (251), 238 states have call predecessors, (251), 224 states have call successors, (251) [2023-03-31 23:34:22,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1482 transitions. [2023-03-31 23:34:22,549 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1482 transitions. Word has length 111 [2023-03-31 23:34:22,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:22,549 INFO L495 AbstractCegarLoop]: Abstraction has 970 states and 1482 transitions. [2023-03-31 23:34:22,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2023-03-31 23:34:22,549 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1482 transitions. [2023-03-31 23:34:22,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-03-31 23:34:22,551 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:22,551 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, 1, 1, 1] [2023-03-31 23:34:22,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 23:34:22,551 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:22,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:22,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1680843399, now seen corresponding path program 1 times [2023-03-31 23:34:22,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:22,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385873410] [2023-03-31 23:34:22,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:22,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:34:22,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:22,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385873410] [2023-03-31 23:34:22,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385873410] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:22,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:22,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 23:34:22,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071581837] [2023-03-31 23:34:22,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:22,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 23:34:22,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:22,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 23:34:22,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:34:22,825 INFO L87 Difference]: Start difference. First operand 970 states and 1482 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 7 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (23), 8 states have call predecessors, (23), 6 states have call successors, (23) [2023-03-31 23:34:24,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:24,746 INFO L93 Difference]: Finished difference Result 2080 states and 3197 transitions. [2023-03-31 23:34:24,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:34:24,747 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 7 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (23), 8 states have call predecessors, (23), 6 states have call successors, (23) Word has length 116 [2023-03-31 23:34:24,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:24,755 INFO L225 Difference]: With dead ends: 2080 [2023-03-31 23:34:24,755 INFO L226 Difference]: Without dead ends: 1408 [2023-03-31 23:34:24,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:34:24,757 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 2566 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 2837 mSolverCounterSat, 1041 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2746 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 3878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1041 IncrementalHoareTripleChecker+Valid, 2837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:24,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2746 Valid, 370 Invalid, 3878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1041 Valid, 2837 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-03-31 23:34:24,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2023-03-31 23:34:24,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1358. [2023-03-31 23:34:24,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 890 states have (on average 1.4955056179775281) internal successors, (1331), 930 states have internal predecessors, (1331), 334 states have call successors, (334), 122 states have call predecessors, (334), 133 states have return successors, (371), 341 states have call predecessors, (371), 326 states have call successors, (371) [2023-03-31 23:34:24,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 2036 transitions. [2023-03-31 23:34:24,811 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 2036 transitions. Word has length 116 [2023-03-31 23:34:24,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:24,811 INFO L495 AbstractCegarLoop]: Abstraction has 1358 states and 2036 transitions. [2023-03-31 23:34:24,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 7 states have call successors, (27), 5 states have call predecessors, (27), 4 states have return successors, (23), 8 states have call predecessors, (23), 6 states have call successors, (23) [2023-03-31 23:34:24,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 2036 transitions. [2023-03-31 23:34:24,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-03-31 23:34:24,813 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:24,813 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, 1, 1, 1, 1, 1] [2023-03-31 23:34:24,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 23:34:24,813 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:24,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:24,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1749536806, now seen corresponding path program 1 times [2023-03-31 23:34:24,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:24,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772860491] [2023-03-31 23:34:24,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:24,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:34:25,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:25,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772860491] [2023-03-31 23:34:25,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772860491] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:25,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:25,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-03-31 23:34:25,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323770629] [2023-03-31 23:34:25,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:25,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 23:34:25,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:25,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 23:34:25,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:34:25,034 INFO L87 Difference]: Start difference. First operand 1358 states and 2036 transitions. Second operand has 9 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2023-03-31 23:34:25,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:25,354 INFO L93 Difference]: Finished difference Result 2646 states and 4067 transitions. [2023-03-31 23:34:25,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 23:34:25,354 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) Word has length 118 [2023-03-31 23:34:25,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:25,361 INFO L225 Difference]: With dead ends: 2646 [2023-03-31 23:34:25,361 INFO L226 Difference]: Without dead ends: 1562 [2023-03-31 23:34:25,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-03-31 23:34:25,367 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 246 mSDsluCounter, 4187 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 4823 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:25,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 4823 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:34:25,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2023-03-31 23:34:25,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1562. [2023-03-31 23:34:25,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1078 states have (on average 1.507421150278293) internal successors, (1625), 1124 states have internal predecessors, (1625), 339 states have call successors, (339), 127 states have call predecessors, (339), 144 states have return successors, (376), 346 states have call predecessors, (376), 331 states have call successors, (376) [2023-03-31 23:34:25,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 2340 transitions. [2023-03-31 23:34:25,483 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 2340 transitions. Word has length 118 [2023-03-31 23:34:25,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:25,483 INFO L495 AbstractCegarLoop]: Abstraction has 1562 states and 2340 transitions. [2023-03-31 23:34:25,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2023-03-31 23:34:25,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 2340 transitions. [2023-03-31 23:34:25,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-03-31 23:34:25,485 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:25,485 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, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:25,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 23:34:25,485 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:25,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:25,485 INFO L85 PathProgramCache]: Analyzing trace with hash 75638369, now seen corresponding path program 1 times [2023-03-31 23:34:25,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:25,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113604645] [2023-03-31 23:34:25,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:25,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:25,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:34:25,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:25,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113604645] [2023-03-31 23:34:25,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113604645] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:25,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:25,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 23:34:25,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639989994] [2023-03-31 23:34:25,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:25,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 23:34:25,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:25,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 23:34:25,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:34:25,768 INFO L87 Difference]: Start difference. First operand 1562 states and 2340 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2023-03-31 23:34:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:27,946 INFO L93 Difference]: Finished difference Result 6237 states and 9667 transitions. [2023-03-31 23:34:27,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:34:27,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) Word has length 119 [2023-03-31 23:34:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:27,966 INFO L225 Difference]: With dead ends: 6237 [2023-03-31 23:34:27,966 INFO L226 Difference]: Without dead ends: 4718 [2023-03-31 23:34:27,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:34:27,977 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 2191 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 3021 mSolverCounterSat, 988 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2268 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 4009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 988 IncrementalHoareTripleChecker+Valid, 3021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:27,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2268 Valid, 929 Invalid, 4009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [988 Valid, 3021 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-03-31 23:34:27,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4718 states. [2023-03-31 23:34:28,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4718 to 4421. [2023-03-31 23:34:28,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4421 states, 3101 states have (on average 1.506610770719123) internal successors, (4672), 3233 states have internal predecessors, (4672), 921 states have call successors, (921), 332 states have call predecessors, (921), 398 states have return successors, (1158), 942 states have call predecessors, (1158), 913 states have call successors, (1158) [2023-03-31 23:34:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4421 states to 4421 states and 6751 transitions. [2023-03-31 23:34:28,210 INFO L78 Accepts]: Start accepts. Automaton has 4421 states and 6751 transitions. Word has length 119 [2023-03-31 23:34:28,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:28,211 INFO L495 AbstractCegarLoop]: Abstraction has 4421 states and 6751 transitions. [2023-03-31 23:34:28,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (23), 6 states have call predecessors, (23), 4 states have call successors, (23) [2023-03-31 23:34:28,211 INFO L276 IsEmpty]: Start isEmpty. Operand 4421 states and 6751 transitions. [2023-03-31 23:34:28,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-03-31 23:34:28,213 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:28,213 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:28,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 23:34:28,213 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:28,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:28,214 INFO L85 PathProgramCache]: Analyzing trace with hash -997623116, now seen corresponding path program 1 times [2023-03-31 23:34:28,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:28,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633223339] [2023-03-31 23:34:28,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:28,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:34:28,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:28,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633223339] [2023-03-31 23:34:28,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633223339] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:28,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:28,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 23:34:28,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919448293] [2023-03-31 23:34:28,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:28,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 23:34:28,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:28,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 23:34:28,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 23:34:28,509 INFO L87 Difference]: Start difference. First operand 4421 states and 6751 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-03-31 23:34:30,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:30,045 INFO L93 Difference]: Finished difference Result 7945 states and 12198 transitions. [2023-03-31 23:34:30,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 23:34:30,046 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 121 [2023-03-31 23:34:30,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:30,067 INFO L225 Difference]: With dead ends: 7945 [2023-03-31 23:34:30,067 INFO L226 Difference]: Without dead ends: 4591 [2023-03-31 23:34:30,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-03-31 23:34:30,082 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 1047 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 3353 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 3759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 3353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:30,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1134 Valid, 519 Invalid, 3759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 3353 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 23:34:30,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4591 states. [2023-03-31 23:34:30,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4591 to 4505. [2023-03-31 23:34:30,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4505 states, 3156 states have (on average 1.5015842839036755) internal successors, (4739), 3300 states have internal predecessors, (4739), 925 states have call successors, (925), 347 states have call predecessors, (925), 423 states have return successors, (1193), 944 states have call predecessors, (1193), 917 states have call successors, (1193) [2023-03-31 23:34:30,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 6857 transitions. [2023-03-31 23:34:30,272 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 6857 transitions. Word has length 121 [2023-03-31 23:34:30,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:30,273 INFO L495 AbstractCegarLoop]: Abstraction has 4505 states and 6857 transitions. [2023-03-31 23:34:30,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 5 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2023-03-31 23:34:30,273 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 6857 transitions. [2023-03-31 23:34:30,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-03-31 23:34:30,275 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:30,275 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, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:30,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-31 23:34:30,275 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:30,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:30,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1822250551, now seen corresponding path program 1 times [2023-03-31 23:34:30,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:30,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219338246] [2023-03-31 23:34:30,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:30,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 23:34:30,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:30,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219338246] [2023-03-31 23:34:30,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219338246] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:30,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:30,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 23:34:30,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003958987] [2023-03-31 23:34:30,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:30,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 23:34:30,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:30,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 23:34:30,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 23:34:30,504 INFO L87 Difference]: Start difference. First operand 4505 states and 6857 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-03-31 23:34:31,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:31,057 INFO L93 Difference]: Finished difference Result 4560 states and 6945 transitions. [2023-03-31 23:34:31,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:34:31,058 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 125 [2023-03-31 23:34:31,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:31,078 INFO L225 Difference]: With dead ends: 4560 [2023-03-31 23:34:31,078 INFO L226 Difference]: Without dead ends: 4543 [2023-03-31 23:34:31,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:34:31,082 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 657 mSDsluCounter, 1378 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:31,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 1986 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 23:34:31,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4543 states. [2023-03-31 23:34:31,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4543 to 4511. [2023-03-31 23:34:31,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4511 states, 3162 states have (on average 1.5006325110689438) internal successors, (4745), 3306 states have internal predecessors, (4745), 925 states have call successors, (925), 347 states have call predecessors, (925), 423 states have return successors, (1193), 944 states have call predecessors, (1193), 917 states have call successors, (1193) [2023-03-31 23:34:31,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 6863 transitions. [2023-03-31 23:34:31,364 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 6863 transitions. Word has length 125 [2023-03-31 23:34:31,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:31,366 INFO L495 AbstractCegarLoop]: Abstraction has 4511 states and 6863 transitions. [2023-03-31 23:34:31,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2023-03-31 23:34:31,366 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 6863 transitions. [2023-03-31 23:34:31,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-03-31 23:34:31,368 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:31,368 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:34:31,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-03-31 23:34:31,368 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:31,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:31,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1777065935, now seen corresponding path program 1 times [2023-03-31 23:34:31,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:31,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653487367] [2023-03-31 23:34:31,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:31,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:31,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 23:34:31,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:31,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653487367] [2023-03-31 23:34:31,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653487367] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:31,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:31,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 23:34:31,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892608838] [2023-03-31 23:34:31,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:31,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 23:34:31,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:31,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 23:34:31,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 23:34:31,623 INFO L87 Difference]: Start difference. First operand 4511 states and 6863 transitions. Second operand has 8 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) [2023-03-31 23:34:31,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:31,894 INFO L93 Difference]: Finished difference Result 4534 states and 6892 transitions. [2023-03-31 23:34:31,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 23:34:31,895 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) Word has length 130 [2023-03-31 23:34:31,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:31,921 INFO L225 Difference]: With dead ends: 4534 [2023-03-31 23:34:31,921 INFO L226 Difference]: Without dead ends: 4517 [2023-03-31 23:34:31,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-03-31 23:34:31,925 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 10 mSDsluCounter, 3647 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 4258 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:31,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 4258 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:34:31,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2023-03-31 23:34:32,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 4511. [2023-03-31 23:34:32,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4511 states, 3162 states have (on average 1.4981024667931688) internal successors, (4737), 3306 states have internal predecessors, (4737), 925 states have call successors, (925), 347 states have call predecessors, (925), 423 states have return successors, (1193), 944 states have call predecessors, (1193), 917 states have call successors, (1193) [2023-03-31 23:34:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 6855 transitions. [2023-03-31 23:34:32,179 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 6855 transitions. Word has length 130 [2023-03-31 23:34:32,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:32,180 INFO L495 AbstractCegarLoop]: Abstraction has 4511 states and 6855 transitions. [2023-03-31 23:34:32,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (26), 4 states have call predecessors, (26), 1 states have call successors, (26) [2023-03-31 23:34:32,180 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 6855 transitions. [2023-03-31 23:34:32,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-03-31 23:34:32,182 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:32,183 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 23:34:32,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-03-31 23:34:32,183 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:32,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:32,183 INFO L85 PathProgramCache]: Analyzing trace with hash -649140589, now seen corresponding path program 1 times [2023-03-31 23:34:32,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:32,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698150876] [2023-03-31 23:34:32,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:32,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 23:34:32,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:32,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698150876] [2023-03-31 23:34:32,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698150876] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:32,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:32,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 23:34:32,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883037381] [2023-03-31 23:34:32,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:32,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:34:32,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:32,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:34:32,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 23:34:32,419 INFO L87 Difference]: Start difference. First operand 4511 states and 6855 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-03-31 23:34:33,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:33,811 INFO L93 Difference]: Finished difference Result 13598 states and 21008 transitions. [2023-03-31 23:34:33,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:34:33,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 144 [2023-03-31 23:34:33,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:33,850 INFO L225 Difference]: With dead ends: 13598 [2023-03-31 23:34:33,851 INFO L226 Difference]: Without dead ends: 9132 [2023-03-31 23:34:33,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:34:33,874 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1217 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1293 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:33,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1293 Valid, 507 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-03-31 23:34:33,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9132 states. [2023-03-31 23:34:34,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9132 to 8824. [2023-03-31 23:34:34,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8824 states, 6238 states have (on average 1.501763385700545) internal successors, (9368), 6531 states have internal predecessors, (9368), 1743 states have call successors, (1743), 655 states have call predecessors, (1743), 842 states have return successors, (2440), 1775 states have call predecessors, (2440), 1734 states have call successors, (2440) [2023-03-31 23:34:34,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8824 states to 8824 states and 13551 transitions. [2023-03-31 23:34:34,335 INFO L78 Accepts]: Start accepts. Automaton has 8824 states and 13551 transitions. Word has length 144 [2023-03-31 23:34:34,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:34,336 INFO L495 AbstractCegarLoop]: Abstraction has 8824 states and 13551 transitions. [2023-03-31 23:34:34,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-03-31 23:34:34,336 INFO L276 IsEmpty]: Start isEmpty. Operand 8824 states and 13551 transitions. [2023-03-31 23:34:34,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-03-31 23:34:34,339 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:34,339 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 23:34:34,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-03-31 23:34:34,339 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:34,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:34,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1349901977, now seen corresponding path program 1 times [2023-03-31 23:34:34,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:34,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123999176] [2023-03-31 23:34:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:34,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 23:34:34,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:34,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123999176] [2023-03-31 23:34:34,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123999176] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:34,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:34,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 23:34:34,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751188317] [2023-03-31 23:34:34,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:34,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:34:34,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:34,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:34:34,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 23:34:34,604 INFO L87 Difference]: Start difference. First operand 8824 states and 13551 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-03-31 23:34:36,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:36,396 INFO L93 Difference]: Finished difference Result 26525 states and 41635 transitions. [2023-03-31 23:34:36,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:34:36,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 145 [2023-03-31 23:34:36,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:36,470 INFO L225 Difference]: With dead ends: 26525 [2023-03-31 23:34:36,470 INFO L226 Difference]: Without dead ends: 17749 [2023-03-31 23:34:36,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:34:36,507 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 1213 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1289 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:36,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1289 Valid, 512 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-03-31 23:34:36,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17749 states. [2023-03-31 23:34:37,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17749 to 17354. [2023-03-31 23:34:37,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17354 states, 12339 states have (on average 1.50206661804036) internal successors, (18534), 12938 states have internal predecessors, (18534), 3310 states have call successors, (3310), 1271 states have call predecessors, (3310), 1704 states have return successors, (5138), 3390 states have call predecessors, (5138), 3299 states have call successors, (5138) [2023-03-31 23:34:37,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17354 states to 17354 states and 26982 transitions. [2023-03-31 23:34:37,573 INFO L78 Accepts]: Start accepts. Automaton has 17354 states and 26982 transitions. Word has length 145 [2023-03-31 23:34:37,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:37,573 INFO L495 AbstractCegarLoop]: Abstraction has 17354 states and 26982 transitions. [2023-03-31 23:34:37,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-03-31 23:34:37,574 INFO L276 IsEmpty]: Start isEmpty. Operand 17354 states and 26982 transitions. [2023-03-31 23:34:37,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-03-31 23:34:37,576 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:37,576 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 23:34:37,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-03-31 23:34:37,576 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:37,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:37,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1104284011, now seen corresponding path program 1 times [2023-03-31 23:34:37,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:37,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597440744] [2023-03-31 23:34:37,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:37,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 23:34:37,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:37,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597440744] [2023-03-31 23:34:37,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597440744] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:37,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:37,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 23:34:37,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911258764] [2023-03-31 23:34:37,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:37,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:34:37,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:37,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:34:37,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 23:34:37,746 INFO L87 Difference]: Start difference. First operand 17354 states and 26982 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-03-31 23:34:40,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:40,878 INFO L93 Difference]: Finished difference Result 52333 states and 84209 transitions. [2023-03-31 23:34:40,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:34:40,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 146 [2023-03-31 23:34:40,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:41,082 INFO L225 Difference]: With dead ends: 52333 [2023-03-31 23:34:41,082 INFO L226 Difference]: Without dead ends: 35033 [2023-03-31 23:34:41,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:34:41,133 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 1210 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:41,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1286 Valid, 517 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-03-31 23:34:41,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35033 states. [2023-03-31 23:34:43,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35033 to 34473. [2023-03-31 23:34:43,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34473 states, 24562 states have (on average 1.5005292728605162) internal successors, (36856), 25789 states have internal predecessors, (36856), 6430 states have call successors, (6430), 2503 states have call predecessors, (6430), 3480 states have return successors, (11426), 6642 states have call predecessors, (11426), 6415 states have call successors, (11426) [2023-03-31 23:34:43,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34473 states to 34473 states and 54712 transitions. [2023-03-31 23:34:43,984 INFO L78 Accepts]: Start accepts. Automaton has 34473 states and 54712 transitions. Word has length 146 [2023-03-31 23:34:43,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:43,985 INFO L495 AbstractCegarLoop]: Abstraction has 34473 states and 54712 transitions. [2023-03-31 23:34:43,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-03-31 23:34:43,985 INFO L276 IsEmpty]: Start isEmpty. Operand 34473 states and 54712 transitions. [2023-03-31 23:34:43,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-03-31 23:34:43,987 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:43,988 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 23:34:43,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-03-31 23:34:43,988 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:43,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:43,988 INFO L85 PathProgramCache]: Analyzing trace with hash 451540406, now seen corresponding path program 1 times [2023-03-31 23:34:43,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:43,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802537857] [2023-03-31 23:34:43,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:43,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 23:34:44,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:44,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802537857] [2023-03-31 23:34:44,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802537857] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:44,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:44,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 23:34:44,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258671707] [2023-03-31 23:34:44,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:44,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:34:44,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:44,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:34:44,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 23:34:44,188 INFO L87 Difference]: Start difference. First operand 34473 states and 54712 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-03-31 23:34:49,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:34:49,944 INFO L93 Difference]: Finished difference Result 104148 states and 174582 transitions. [2023-03-31 23:34:49,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:34:49,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 148 [2023-03-31 23:34:49,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:34:50,375 INFO L225 Difference]: With dead ends: 104148 [2023-03-31 23:34:50,375 INFO L226 Difference]: Without dead ends: 69741 [2023-03-31 23:34:50,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:34:50,644 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 1207 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1283 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:34:50,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1283 Valid, 522 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-31 23:34:50,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69741 states. [2023-03-31 23:34:55,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69741 to 68840. [2023-03-31 23:34:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68840 states, 49057 states have (on average 1.497971747151273) internal successors, (73486), 51572 states have internal predecessors, (73486), 12638 states have call successors, (12638), 4967 states have call predecessors, (12638), 7144 states have return successors, (26910), 13194 states have call predecessors, (26910), 12615 states have call successors, (26910) [2023-03-31 23:34:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68840 states to 68840 states and 113034 transitions. [2023-03-31 23:34:55,973 INFO L78 Accepts]: Start accepts. Automaton has 68840 states and 113034 transitions. Word has length 148 [2023-03-31 23:34:55,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:34:55,974 INFO L495 AbstractCegarLoop]: Abstraction has 68840 states and 113034 transitions. [2023-03-31 23:34:55,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-03-31 23:34:55,974 INFO L276 IsEmpty]: Start isEmpty. Operand 68840 states and 113034 transitions. [2023-03-31 23:34:55,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-03-31 23:34:55,977 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:34:55,977 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 23:34:55,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-03-31 23:34:55,977 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:34:55,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:34:55,977 INFO L85 PathProgramCache]: Analyzing trace with hash -410198377, now seen corresponding path program 1 times [2023-03-31 23:34:55,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:34:55,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864782103] [2023-03-31 23:34:55,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:34:55,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:34:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:34:56,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 23:34:56,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:34:56,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864782103] [2023-03-31 23:34:56,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864782103] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:34:56,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:34:56,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 23:34:56,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142365073] [2023-03-31 23:34:56,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:34:56,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:34:56,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:34:56,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:34:56,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 23:34:56,185 INFO L87 Difference]: Start difference. First operand 68840 states and 113034 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-03-31 23:35:06,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:35:06,632 INFO L93 Difference]: Finished difference Result 208275 states and 372786 transitions. [2023-03-31 23:35:06,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:35:06,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 4 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 148 [2023-03-31 23:35:06,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:35:07,445 INFO L225 Difference]: With dead ends: 208275 [2023-03-31 23:35:07,446 INFO L226 Difference]: Without dead ends: 139513 [2023-03-31 23:35:07,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:35:07,820 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 1205 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1281 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-31 23:35:07,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1281 Valid, 528 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-31 23:35:07,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139513 states.