./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d84130cab59568fb669543ac086f4847eedfc87145b3c30d32e19c1d0d03b42f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:53:29,161 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:53:29,236 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 18:53:29,241 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:53:29,241 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:53:29,270 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:53:29,270 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:53:29,271 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:53:29,271 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:53:29,272 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:53:29,273 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:53:29,273 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:53:29,274 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:53:29,275 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:53:29,275 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:53:29,276 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:53:29,276 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:53:29,277 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:53:29,277 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:53:29,278 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:53:29,279 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:53:29,281 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:53:29,282 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:53:29,282 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:53:29,283 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:53:29,283 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:53:29,284 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:53:29,284 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:53:29,285 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:53:29,285 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:53:29,286 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:53:29,286 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:53:29,287 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:53:29,287 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:53:29,287 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:53:29,287 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:53:29,288 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:53:29,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:53:29,288 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:53:29,288 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:53:29,288 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:53:29,289 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:53:29,289 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:53:29,289 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:53:29,290 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:53:29,290 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:53:29,290 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:53:29,290 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d84130cab59568fb669543ac086f4847eedfc87145b3c30d32e19c1d0d03b42f [2023-12-02 18:53:29,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:53:29,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:53:29,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:53:29,548 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:53:29,548 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:53:29,549 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c [2023-12-02 18:53:32,643 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:53:32,952 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:53:32,953 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c [2023-12-02 18:53:32,974 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/data/795fbe092/b6800079a5de495786a8a020b368987a/FLAG51ad602b6 [2023-12-02 18:53:32,988 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/data/795fbe092/b6800079a5de495786a8a020b368987a [2023-12-02 18:53:32,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:53:32,992 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:53:32,993 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:53:32,993 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:53:32,998 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:53:32,998 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:53:32" (1/1) ... [2023-12-02 18:53:32,999 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77a8d118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:32, skipping insertion in model container [2023-12-02 18:53:33,000 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:53:32" (1/1) ... [2023-12-02 18:53:33,070 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:53:33,463 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c[61393,61406] [2023-12-02 18:53:33,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:53:33,516 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:53:33,526 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [48] [2023-12-02 18:53:33,527 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [169] [2023-12-02 18:53:33,528 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification13_spec.i","") [837] [2023-12-02 18:53:33,528 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [932] [2023-12-02 18:53:33,528 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [1290] [2023-12-02 18:53:33,528 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [1382] [2023-12-02 18:53:33,529 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [2960] [2023-12-02 18:53:33,529 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [2995] [2023-12-02 18:53:33,529 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [3004] [2023-12-02 18:53:33,529 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [3019] [2023-12-02 18:53:33,601 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/sv-benchmarks/c/product-lines/elevator_spec13_product30.cil.c[61393,61406] [2023-12-02 18:53:33,615 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:53:33,644 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:53:33,644 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:33 WrapperNode [2023-12-02 18:53:33,644 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:53:33,645 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:53:33,646 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:53:33,646 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:53:33,653 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:33" (1/1) ... [2023-12-02 18:53:33,680 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:33" (1/1) ... [2023-12-02 18:53:33,723 INFO L138 Inliner]: procedures = 93, calls = 346, calls flagged for inlining = 30, calls inlined = 26, statements flattened = 882 [2023-12-02 18:53:33,723 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:53:33,724 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:53:33,724 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:53:33,724 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:53:33,734 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:33" (1/1) ... [2023-12-02 18:53:33,734 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:33" (1/1) ... [2023-12-02 18:53:33,741 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:33" (1/1) ... [2023-12-02 18:53:33,741 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:33" (1/1) ... [2023-12-02 18:53:33,761 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:33" (1/1) ... [2023-12-02 18:53:33,776 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:33" (1/1) ... [2023-12-02 18:53:33,780 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:33" (1/1) ... [2023-12-02 18:53:33,785 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:33" (1/1) ... [2023-12-02 18:53:33,791 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:53:33,792 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:53:33,792 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:53:33,792 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:53:33,793 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:33" (1/1) ... [2023-12-02 18:53:33,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:53:33,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:53:33,826 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:53:33,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:53:33,859 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-12-02 18:53:33,859 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-12-02 18:53:33,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:53:33,860 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-12-02 18:53:33,860 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-12-02 18:53:33,860 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-12-02 18:53:33,860 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-12-02 18:53:33,860 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-12-02 18:53:33,861 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-12-02 18:53:33,861 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-12-02 18:53:33,861 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-12-02 18:53:33,861 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-12-02 18:53:33,861 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-12-02 18:53:33,861 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-12-02 18:53:33,862 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-12-02 18:53:33,862 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-12-02 18:53:33,862 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-12-02 18:53:33,862 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-12-02 18:53:33,862 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-12-02 18:53:33,862 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-12-02 18:53:33,862 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-12-02 18:53:33,863 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-12-02 18:53:33,863 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-12-02 18:53:33,863 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-12-02 18:53:33,863 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-12-02 18:53:33,863 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-12-02 18:53:33,863 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-12-02 18:53:33,864 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-12-02 18:53:33,864 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-12-02 18:53:33,864 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-12-02 18:53:33,864 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-12-02 18:53:33,864 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-12-02 18:53:33,864 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-12-02 18:53:33,864 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-12-02 18:53:33,865 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-12-02 18:53:33,865 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-12-02 18:53:33,865 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-12-02 18:53:33,865 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-12-02 18:53:33,865 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-12-02 18:53:33,865 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-12-02 18:53:33,866 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-12-02 18:53:33,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:53:33,866 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-12-02 18:53:33,866 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-12-02 18:53:33,866 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-12-02 18:53:33,866 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-12-02 18:53:33,866 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-12-02 18:53:33,866 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-12-02 18:53:33,867 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-12-02 18:53:33,867 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-12-02 18:53:33,867 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2023-12-02 18:53:33,867 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2023-12-02 18:53:33,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:53:33,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:53:33,867 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-12-02 18:53:33,868 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-12-02 18:53:34,014 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:53:34,016 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:53:35,143 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:53:36,184 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:53:36,184 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-02 18:53:36,186 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:53:36 BoogieIcfgContainer [2023-12-02 18:53:36,186 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:53:36,189 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:53:36,190 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:53:36,194 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:53:36,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:53:32" (1/3) ... [2023-12-02 18:53:36,195 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7714529e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:53:36, skipping insertion in model container [2023-12-02 18:53:36,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:33" (2/3) ... [2023-12-02 18:53:36,195 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7714529e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:53:36, skipping insertion in model container [2023-12-02 18:53:36,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:53:36" (3/3) ... [2023-12-02 18:53:36,197 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product30.cil.c [2023-12-02 18:53:36,221 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:53:36,222 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:53:36,297 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:53:36,305 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=LoopHeads, 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;@3ce8b6c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:53:36,305 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:53:36,314 INFO L276 IsEmpty]: Start isEmpty. Operand has 416 states, 286 states have (on average 1.597902097902098) internal successors, (457), 306 states have internal predecessors, (457), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2023-12-02 18:53:36,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 18:53:36,342 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:53:36,343 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:53:36,344 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:53:36,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:53:36,350 INFO L85 PathProgramCache]: Analyzing trace with hash -877894633, now seen corresponding path program 1 times [2023-12-02 18:53:36,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:53:36,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312383908] [2023-12-02 18:53:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:53:36,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:53:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:53:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 18:53:36,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:53:36,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312383908] [2023-12-02 18:53:36,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312383908] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:53:36,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72941361] [2023-12-02 18:53:36,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:53:36,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:53:36,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:53:36,792 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:53:36,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:53:37,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:53:37,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 18:53:37,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:53:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:53:37,243 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:53:37,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72941361] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:53:37,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:53:37,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2023-12-02 18:53:37,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237820776] [2023-12-02 18:53:37,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:53:37,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 18:53:37,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:53:37,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 18:53:37,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 18:53:37,295 INFO L87 Difference]: Start difference. First operand has 416 states, 286 states have (on average 1.597902097902098) internal successors, (457), 306 states have internal predecessors, (457), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 18:53:37,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:53:37,504 INFO L93 Difference]: Finished difference Result 816 states and 1311 transitions. [2023-12-02 18:53:37,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 18:53:37,506 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 58 [2023-12-02 18:53:37,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:53:37,526 INFO L225 Difference]: With dead ends: 816 [2023-12-02 18:53:37,526 INFO L226 Difference]: Without dead ends: 410 [2023-12-02 18:53:37,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 18:53:37,540 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:53:37,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 616 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:53:37,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2023-12-02 18:53:37,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2023-12-02 18:53:37,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 283 states have (on average 1.5724381625441697) internal successors, (445), 301 states have internal predecessors, (445), 102 states have call successors, (102), 26 states have call predecessors, (102), 24 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2023-12-02 18:53:37,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 646 transitions. [2023-12-02 18:53:37,634 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 646 transitions. Word has length 58 [2023-12-02 18:53:37,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:53:37,636 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 646 transitions. [2023-12-02 18:53:37,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 18:53:37,636 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 646 transitions. [2023-12-02 18:53:37,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 18:53:37,643 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:53:37,643 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:53:37,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:53:37,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 18:53:37,849 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:53:37,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:53:37,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1593842826, now seen corresponding path program 1 times [2023-12-02 18:53:37,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:53:37,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953794478] [2023-12-02 18:53:37,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:53:37,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:53:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:53:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 18:53:38,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:53:38,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953794478] [2023-12-02 18:53:38,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953794478] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:53:38,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:53:38,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:53:38,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111473093] [2023-12-02 18:53:38,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:53:38,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:53:38,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:53:38,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:53:38,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:53:38,417 INFO L87 Difference]: Start difference. First operand 410 states and 646 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-12-02 18:53:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:53:41,324 INFO L93 Difference]: Finished difference Result 1706 states and 2748 transitions. [2023-12-02 18:53:41,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:53:41,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 70 [2023-12-02 18:53:41,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:53:41,341 INFO L225 Difference]: With dead ends: 1706 [2023-12-02 18:53:41,341 INFO L226 Difference]: Without dead ends: 1311 [2023-12-02 18:53:41,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:53:41,347 INFO L413 NwaCegarLoop]: 863 mSDtfsCounter, 1944 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 2002 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2089 SdHoareTripleChecker+Valid, 1402 SdHoareTripleChecker+Invalid, 2339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 2002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:53:41,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2089 Valid, 1402 Invalid, 2339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 2002 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-02 18:53:41,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2023-12-02 18:53:41,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1198. [2023-12-02 18:53:41,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 868 states have (on average 1.596774193548387) internal successors, (1386), 903 states have internal predecessors, (1386), 268 states have call successors, (268), 62 states have call predecessors, (268), 61 states have return successors, (286), 247 states have call predecessors, (286), 264 states have call successors, (286) [2023-12-02 18:53:41,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1940 transitions. [2023-12-02 18:53:41,488 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1940 transitions. Word has length 70 [2023-12-02 18:53:41,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:53:41,489 INFO L495 AbstractCegarLoop]: Abstraction has 1198 states and 1940 transitions. [2023-12-02 18:53:41,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-12-02 18:53:41,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1940 transitions. [2023-12-02 18:53:41,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-02 18:53:41,495 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:53:41,495 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:53:41,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 18:53:41,496 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:53:41,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:53:41,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1891494434, now seen corresponding path program 1 times [2023-12-02 18:53:41,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:53:41,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601096428] [2023-12-02 18:53:41,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:53:41,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:53:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:53:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:53:41,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:53:41,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601096428] [2023-12-02 18:53:41,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601096428] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:53:41,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:53:41,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:53:41,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681197042] [2023-12-02 18:53:41,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:53:41,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:53:41,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:53:41,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:53:41,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:53:41,922 INFO L87 Difference]: Start difference. First operand 1198 states and 1940 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-12-02 18:53:42,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:53:42,226 INFO L93 Difference]: Finished difference Result 2962 states and 4797 transitions. [2023-12-02 18:53:42,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:53:42,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 87 [2023-12-02 18:53:42,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:53:42,242 INFO L225 Difference]: With dead ends: 2962 [2023-12-02 18:53:42,242 INFO L226 Difference]: Without dead ends: 1779 [2023-12-02 18:53:42,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:53:42,253 INFO L413 NwaCegarLoop]: 770 mSDtfsCounter, 490 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 1915 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:53:42,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 1915 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:53:42,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2023-12-02 18:53:42,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1738. [2023-12-02 18:53:42,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1267 states have (on average 1.568271507498027) internal successors, (1987), 1300 states have internal predecessors, (1987), 378 states have call successors, (378), 88 states have call predecessors, (378), 92 states have return successors, (439), 362 states have call predecessors, (439), 372 states have call successors, (439) [2023-12-02 18:53:42,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 2804 transitions. [2023-12-02 18:53:42,411 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 2804 transitions. Word has length 87 [2023-12-02 18:53:42,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:53:42,412 INFO L495 AbstractCegarLoop]: Abstraction has 1738 states and 2804 transitions. [2023-12-02 18:53:42,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-12-02 18:53:42,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 2804 transitions. [2023-12-02 18:53:42,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-02 18:53:42,416 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:53:42,416 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:53:42,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 18:53:42,417 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:53:42,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:53:42,417 INFO L85 PathProgramCache]: Analyzing trace with hash 828889193, now seen corresponding path program 1 times [2023-12-02 18:53:42,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:53:42,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785373667] [2023-12-02 18:53:42,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:53:42,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:53:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:53:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:53:42,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:53:42,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785373667] [2023-12-02 18:53:42,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785373667] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:53:42,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:53:42,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 18:53:42,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993067603] [2023-12-02 18:53:42,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:53:42,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:53:42,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:53:42,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:53:42,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:53:42,777 INFO L87 Difference]: Start difference. First operand 1738 states and 2804 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-12-02 18:53:46,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:53:46,825 INFO L93 Difference]: Finished difference Result 5579 states and 9057 transitions. [2023-12-02 18:53:46,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 18:53:46,826 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 88 [2023-12-02 18:53:46,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:53:46,855 INFO L225 Difference]: With dead ends: 5579 [2023-12-02 18:53:46,855 INFO L226 Difference]: Without dead ends: 3858 [2023-12-02 18:53:46,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-12-02 18:53:46,870 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 1854 mSDsluCounter, 2252 mSDsCounter, 0 mSdLazyCounter, 4651 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1938 SdHoareTripleChecker+Valid, 2684 SdHoareTripleChecker+Invalid, 5214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 4651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:53:46,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1938 Valid, 2684 Invalid, 5214 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [563 Valid, 4651 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-12-02 18:53:46,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3858 states. [2023-12-02 18:53:47,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3858 to 3389. [2023-12-02 18:53:47,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3389 states, 2491 states have (on average 1.583701324769169) internal successors, (3945), 2548 states have internal predecessors, (3945), 708 states have call successors, (708), 166 states have call predecessors, (708), 189 states have return successors, (838), 698 states have call predecessors, (838), 700 states have call successors, (838) [2023-12-02 18:53:47,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3389 states to 3389 states and 5491 transitions. [2023-12-02 18:53:47,132 INFO L78 Accepts]: Start accepts. Automaton has 3389 states and 5491 transitions. Word has length 88 [2023-12-02 18:53:47,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:53:47,133 INFO L495 AbstractCegarLoop]: Abstraction has 3389 states and 5491 transitions. [2023-12-02 18:53:47,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2023-12-02 18:53:47,133 INFO L276 IsEmpty]: Start isEmpty. Operand 3389 states and 5491 transitions. [2023-12-02 18:53:47,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 18:53:47,138 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:53:47,139 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:53:47,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 18:53:47,139 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:53:47,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:53:47,140 INFO L85 PathProgramCache]: Analyzing trace with hash 35761943, now seen corresponding path program 1 times [2023-12-02 18:53:47,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:53:47,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443697016] [2023-12-02 18:53:47,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:53:47,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:53:47,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:53:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:53:47,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:53:47,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443697016] [2023-12-02 18:53:47,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443697016] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:53:47,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:53:47,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 18:53:47,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330031797] [2023-12-02 18:53:47,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:53:47,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:53:47,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:53:47,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:53:47,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:53:47,488 INFO L87 Difference]: Start difference. First operand 3389 states and 5491 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 18:53:47,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:53:47,913 INFO L93 Difference]: Finished difference Result 5701 states and 9283 transitions. [2023-12-02 18:53:47,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:53:47,914 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 93 [2023-12-02 18:53:47,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:53:47,952 INFO L225 Difference]: With dead ends: 5701 [2023-12-02 18:53:47,952 INFO L226 Difference]: Without dead ends: 3494 [2023-12-02 18:53:47,975 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 [2023-12-02 18:53:47,976 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 6 mSDsluCounter, 3034 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3649 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:53:47,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3649 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:53:47,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3494 states. [2023-12-02 18:53:48,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3494 to 3452. [2023-12-02 18:53:48,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3452 states, 2536 states have (on average 1.5733438485804416) internal successors, (3990), 2593 states have internal predecessors, (3990), 708 states have call successors, (708), 166 states have call predecessors, (708), 207 states have return successors, (883), 716 states have call predecessors, (883), 700 states have call successors, (883) [2023-12-02 18:53:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3452 states to 3452 states and 5581 transitions. [2023-12-02 18:53:48,273 INFO L78 Accepts]: Start accepts. Automaton has 3452 states and 5581 transitions. Word has length 93 [2023-12-02 18:53:48,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:53:48,274 INFO L495 AbstractCegarLoop]: Abstraction has 3452 states and 5581 transitions. [2023-12-02 18:53:48,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 18:53:48,274 INFO L276 IsEmpty]: Start isEmpty. Operand 3452 states and 5581 transitions. [2023-12-02 18:53:48,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-02 18:53:48,279 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:53:48,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:53:48,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 18:53:48,280 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:53:48,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:53:48,280 INFO L85 PathProgramCache]: Analyzing trace with hash 946957524, now seen corresponding path program 1 times [2023-12-02 18:53:48,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:53:48,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130248826] [2023-12-02 18:53:48,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:53:48,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:53:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:53:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:53:48,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:53:48,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130248826] [2023-12-02 18:53:48,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130248826] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:53:48,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:53:48,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 18:53:48,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706524048] [2023-12-02 18:53:48,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:53:48,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:53:48,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:53:48,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:53:48,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:53:48,621 INFO L87 Difference]: Start difference. First operand 3452 states and 5581 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 18:53:48,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:53:48,907 INFO L93 Difference]: Finished difference Result 5788 states and 9397 transitions. [2023-12-02 18:53:48,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:53:48,908 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 92 [2023-12-02 18:53:48,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:53:48,929 INFO L225 Difference]: With dead ends: 5788 [2023-12-02 18:53:48,929 INFO L226 Difference]: Without dead ends: 3539 [2023-12-02 18:53:48,943 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 [2023-12-02 18:53:48,944 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 7 mSDsluCounter, 3015 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3625 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:53:48,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3625 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:53:48,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3539 states. [2023-12-02 18:53:49,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3539 to 3461. [2023-12-02 18:53:49,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3461 states, 2545 states have (on average 1.5713163064833007) internal successors, (3999), 2593 states have internal predecessors, (3999), 708 states have call successors, (708), 166 states have call predecessors, (708), 207 states have return successors, (883), 725 states have call predecessors, (883), 700 states have call successors, (883) [2023-12-02 18:53:49,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3461 states to 3461 states and 5590 transitions. [2023-12-02 18:53:49,120 INFO L78 Accepts]: Start accepts. Automaton has 3461 states and 5590 transitions. Word has length 92 [2023-12-02 18:53:49,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:53:49,121 INFO L495 AbstractCegarLoop]: Abstraction has 3461 states and 5590 transitions. [2023-12-02 18:53:49,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 18:53:49,121 INFO L276 IsEmpty]: Start isEmpty. Operand 3461 states and 5590 transitions. [2023-12-02 18:53:49,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 18:53:49,124 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:53:49,124 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:53:49,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 18:53:49,124 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:53:49,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:53:49,125 INFO L85 PathProgramCache]: Analyzing trace with hash -827294409, now seen corresponding path program 1 times [2023-12-02 18:53:49,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:53:49,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755457410] [2023-12-02 18:53:49,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:53:49,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:53:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:53:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:53:49,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:53:49,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755457410] [2023-12-02 18:53:49,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755457410] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:53:49,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:53:49,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 18:53:49,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089596961] [2023-12-02 18:53:49,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:53:49,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:53:49,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:53:49,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:53:49,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:53:49,306 INFO L87 Difference]: Start difference. First operand 3461 states and 5590 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 18:53:49,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:53:49,646 INFO L93 Difference]: Finished difference Result 5803 states and 9412 transitions. [2023-12-02 18:53:49,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:53:49,647 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 93 [2023-12-02 18:53:49,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:53:49,677 INFO L225 Difference]: With dead ends: 5803 [2023-12-02 18:53:49,677 INFO L226 Difference]: Without dead ends: 3548 [2023-12-02 18:53:49,695 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 [2023-12-02 18:53:49,696 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 6 mSDsluCounter, 3034 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3649 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:53:49,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3649 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:53:49,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2023-12-02 18:53:49,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 3470. [2023-12-02 18:53:49,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3470 states, 2554 states have (on average 1.5693030540328896) internal successors, (4008), 2593 states have internal predecessors, (4008), 708 states have call successors, (708), 166 states have call predecessors, (708), 207 states have return successors, (883), 734 states have call predecessors, (883), 700 states have call successors, (883) [2023-12-02 18:53:49,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 5599 transitions. [2023-12-02 18:53:49,951 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 5599 transitions. Word has length 93 [2023-12-02 18:53:49,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:53:49,952 INFO L495 AbstractCegarLoop]: Abstraction has 3470 states and 5599 transitions. [2023-12-02 18:53:49,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 18:53:49,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 5599 transitions. [2023-12-02 18:53:49,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-12-02 18:53:49,957 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:53:49,957 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:53:49,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 18:53:49,958 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:53:49,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:53:49,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1134452447, now seen corresponding path program 1 times [2023-12-02 18:53:49,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:53:49,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647995383] [2023-12-02 18:53:49,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:53:49,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:53:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:53:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:53:50,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:53:50,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647995383] [2023-12-02 18:53:50,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647995383] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:53:50,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:53:50,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 18:53:50,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747879647] [2023-12-02 18:53:50,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:53:50,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:53:50,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:53:50,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:53:50,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:53:50,304 INFO L87 Difference]: Start difference. First operand 3470 states and 5599 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-12-02 18:53:52,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:53:52,904 INFO L93 Difference]: Finished difference Result 8813 states and 14450 transitions. [2023-12-02 18:53:52,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:53:52,904 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) Word has length 97 [2023-12-02 18:53:52,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:53:52,960 INFO L225 Difference]: With dead ends: 8813 [2023-12-02 18:53:52,960 INFO L226 Difference]: Without dead ends: 6189 [2023-12-02 18:53:52,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:53:52,981 INFO L413 NwaCegarLoop]: 903 mSDtfsCounter, 2900 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 853 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3091 SdHoareTripleChecker+Valid, 1920 SdHoareTripleChecker+Invalid, 2933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 853 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:53:52,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3091 Valid, 1920 Invalid, 2933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [853 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 18:53:52,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6189 states. [2023-12-02 18:53:53,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6189 to 5363. [2023-12-02 18:53:53,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5363 states, 3898 states have (on average 1.5330938943047716) internal successors, (5976), 3968 states have internal predecessors, (5976), 1123 states have call successors, (1123), 279 states have call predecessors, (1123), 341 states have return successors, (1432), 1151 states have call predecessors, (1432), 1111 states have call successors, (1432) [2023-12-02 18:53:53,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5363 states to 5363 states and 8531 transitions. [2023-12-02 18:53:53,456 INFO L78 Accepts]: Start accepts. Automaton has 5363 states and 8531 transitions. Word has length 97 [2023-12-02 18:53:53,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:53:53,456 INFO L495 AbstractCegarLoop]: Abstraction has 5363 states and 8531 transitions. [2023-12-02 18:53:53,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-12-02 18:53:53,457 INFO L276 IsEmpty]: Start isEmpty. Operand 5363 states and 8531 transitions. [2023-12-02 18:53:53,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-12-02 18:53:53,461 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:53:53,461 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:53:53,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 18:53:53,461 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:53:53,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:53:53,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1140307381, now seen corresponding path program 1 times [2023-12-02 18:53:53,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:53:53,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890791038] [2023-12-02 18:53:53,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:53:53,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:53:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:53:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:53:53,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:53:53,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890791038] [2023-12-02 18:53:53,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890791038] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:53:53,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:53:53,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:53:53,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991723958] [2023-12-02 18:53:53,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:53:53,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:53:53,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:53:53,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:53:53,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:53:53,781 INFO L87 Difference]: Start difference. First operand 5363 states and 8531 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-12-02 18:53:54,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:53:54,397 INFO L93 Difference]: Finished difference Result 10638 states and 17177 transitions. [2023-12-02 18:53:54,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 18:53:54,398 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 99 [2023-12-02 18:53:54,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:53:54,428 INFO L225 Difference]: With dead ends: 10638 [2023-12-02 18:53:54,428 INFO L226 Difference]: Without dead ends: 6049 [2023-12-02 18:53:54,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:53:54,445 INFO L413 NwaCegarLoop]: 802 mSDtfsCounter, 724 mSDsluCounter, 4155 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 4957 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:53:54,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 4957 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:53:54,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6049 states. [2023-12-02 18:53:54,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6049 to 5975. [2023-12-02 18:53:54,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5975 states, 4462 states have (on average 1.5369789332138055) internal successors, (6858), 4550 states have internal predecessors, (6858), 1138 states have call successors, (1138), 294 states have call predecessors, (1138), 374 states have return successors, (1447), 1166 states have call predecessors, (1447), 1126 states have call successors, (1447) [2023-12-02 18:53:54,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5975 states to 5975 states and 9443 transitions. [2023-12-02 18:53:54,897 INFO L78 Accepts]: Start accepts. Automaton has 5975 states and 9443 transitions. Word has length 99 [2023-12-02 18:53:54,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:53:54,897 INFO L495 AbstractCegarLoop]: Abstraction has 5975 states and 9443 transitions. [2023-12-02 18:53:54,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-12-02 18:53:54,898 INFO L276 IsEmpty]: Start isEmpty. Operand 5975 states and 9443 transitions. [2023-12-02 18:53:54,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-12-02 18:53:54,903 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:53:54,903 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:53:54,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 18:53:54,903 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:53:54,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:53:54,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1087317285, now seen corresponding path program 1 times [2023-12-02 18:53:54,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:53:54,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160012634] [2023-12-02 18:53:54,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:53:54,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:53:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:53:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:53:55,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:53:55,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160012634] [2023-12-02 18:53:55,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160012634] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:53:55,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:53:55,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 18:53:55,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453976165] [2023-12-02 18:53:55,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:53:55,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:53:55,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:53:55,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:53:55,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:53:55,242 INFO L87 Difference]: Start difference. First operand 5975 states and 9443 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-12-02 18:53:57,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:53:57,972 INFO L93 Difference]: Finished difference Result 12130 states and 19437 transitions. [2023-12-02 18:53:57,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 18:53:57,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 101 [2023-12-02 18:53:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:53:58,014 INFO L225 Difference]: With dead ends: 12130 [2023-12-02 18:53:58,014 INFO L226 Difference]: Without dead ends: 7331 [2023-12-02 18:53:58,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:53:58,029 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 1104 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 3063 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 1732 SdHoareTripleChecker+Invalid, 3467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 3063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:53:58,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 1732 Invalid, 3467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 3063 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-02 18:53:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7331 states. [2023-12-02 18:53:58,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7331 to 6056. [2023-12-02 18:53:58,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6056 states, 4516 states have (on average 1.533215234720992) internal successors, (6924), 4616 states have internal predecessors, (6924), 1141 states have call successors, (1141), 309 states have call predecessors, (1141), 398 states have return successors, (1480), 1166 states have call predecessors, (1480), 1129 states have call successors, (1480) [2023-12-02 18:53:58,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6056 states to 6056 states and 9545 transitions. [2023-12-02 18:53:58,382 INFO L78 Accepts]: Start accepts. Automaton has 6056 states and 9545 transitions. Word has length 101 [2023-12-02 18:53:58,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:53:58,383 INFO L495 AbstractCegarLoop]: Abstraction has 6056 states and 9545 transitions. [2023-12-02 18:53:58,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-12-02 18:53:58,384 INFO L276 IsEmpty]: Start isEmpty. Operand 6056 states and 9545 transitions. [2023-12-02 18:53:58,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-12-02 18:53:58,388 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:53:58,388 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:53:58,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 18:53:58,389 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:53:58,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:53:58,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1650086927, now seen corresponding path program 1 times [2023-12-02 18:53:58,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:53:58,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738977226] [2023-12-02 18:53:58,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:53:58,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:53:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:53:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 18:53:58,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:53:58,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738977226] [2023-12-02 18:53:58,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738977226] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:53:58,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945733016] [2023-12-02 18:53:58,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:53:58,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:53:58,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:53:58,542 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:53:58,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 18:53:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:53:58,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 1584 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:53:58,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:53:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:53:58,964 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:53:58,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945733016] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:53:58,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:53:58,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-12-02 18:53:58,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287484291] [2023-12-02 18:53:58,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:53:58,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:53:58,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:53:58,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:53:58,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:53:58,967 INFO L87 Difference]: Start difference. First operand 6056 states and 9545 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 18:53:59,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:53:59,356 INFO L93 Difference]: Finished difference Result 12187 states and 19521 transitions. [2023-12-02 18:53:59,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:53:59,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 106 [2023-12-02 18:53:59,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:53:59,392 INFO L225 Difference]: With dead ends: 12187 [2023-12-02 18:53:59,392 INFO L226 Difference]: Without dead ends: 6146 [2023-12-02 18:53:59,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:53:59,422 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 85 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:53:59,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1719 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:53:59,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6146 states. [2023-12-02 18:53:59,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6146 to 6146. [2023-12-02 18:53:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6146 states, 4591 states have (on average 1.5277717272925289) internal successors, (7014), 4691 states have internal predecessors, (7014), 1141 states have call successors, (1141), 324 states have call predecessors, (1141), 413 states have return successors, (1480), 1166 states have call predecessors, (1480), 1129 states have call successors, (1480) [2023-12-02 18:53:59,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6146 states to 6146 states and 9635 transitions. [2023-12-02 18:53:59,806 INFO L78 Accepts]: Start accepts. Automaton has 6146 states and 9635 transitions. Word has length 106 [2023-12-02 18:53:59,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:53:59,807 INFO L495 AbstractCegarLoop]: Abstraction has 6146 states and 9635 transitions. [2023-12-02 18:53:59,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 18:53:59,807 INFO L276 IsEmpty]: Start isEmpty. Operand 6146 states and 9635 transitions. [2023-12-02 18:53:59,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-12-02 18:53:59,812 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:53:59,812 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:53:59,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 18:54:00,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 18:54:00,016 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:54:00,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:54:00,016 INFO L85 PathProgramCache]: Analyzing trace with hash -2094809049, now seen corresponding path program 1 times [2023-12-02 18:54:00,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:54:00,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555103597] [2023-12-02 18:54:00,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:54:00,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:54:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:54:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:54:00,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:54:00,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555103597] [2023-12-02 18:54:00,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555103597] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:54:00,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932978596] [2023-12-02 18:54:00,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:54:00,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:54:00,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:54:00,213 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:54:00,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 18:54:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:54:00,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:54:00,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:54:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:54:00,589 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:54:00,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932978596] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:54:00,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:54:00,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-12-02 18:54:00,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589207413] [2023-12-02 18:54:00,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:54:00,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:54:00,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:54:00,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:54:00,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:54:00,591 INFO L87 Difference]: Start difference. First operand 6146 states and 9635 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 18:54:01,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:54:01,181 INFO L93 Difference]: Finished difference Result 12322 states and 19540 transitions. [2023-12-02 18:54:01,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:54:01,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 107 [2023-12-02 18:54:01,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:54:01,209 INFO L225 Difference]: With dead ends: 12322 [2023-12-02 18:54:01,209 INFO L226 Difference]: Without dead ends: 6131 [2023-12-02 18:54:01,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:54:01,233 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 91 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1715 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:54:01,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1715 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:54:01,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6131 states. [2023-12-02 18:54:01,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6131 to 6131. [2023-12-02 18:54:01,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6131 states, 4576 states have (on average 1.519667832167832) internal successors, (6954), 4676 states have internal predecessors, (6954), 1141 states have call successors, (1141), 324 states have call predecessors, (1141), 413 states have return successors, (1480), 1166 states have call predecessors, (1480), 1129 states have call successors, (1480) [2023-12-02 18:54:01,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6131 states to 6131 states and 9575 transitions. [2023-12-02 18:54:01,629 INFO L78 Accepts]: Start accepts. Automaton has 6131 states and 9575 transitions. Word has length 107 [2023-12-02 18:54:01,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:54:01,629 INFO L495 AbstractCegarLoop]: Abstraction has 6131 states and 9575 transitions. [2023-12-02 18:54:01,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 18:54:01,630 INFO L276 IsEmpty]: Start isEmpty. Operand 6131 states and 9575 transitions. [2023-12-02 18:54:01,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-02 18:54:01,634 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:54:01,634 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:54:01,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 18:54:01,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:54:01,835 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:54:01,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:54:01,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1883865573, now seen corresponding path program 1 times [2023-12-02 18:54:01,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:54:01,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411342258] [2023-12-02 18:54:01,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:54:01,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:54:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:54:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 18:54:02,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:54:02,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411342258] [2023-12-02 18:54:02,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411342258] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:54:02,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956948921] [2023-12-02 18:54:02,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:54:02,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:54:02,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:54:02,070 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:54:02,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 18:54:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:54:02,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 1592 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:54:02,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:54:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:54:02,495 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:54:02,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956948921] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:54:02,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:54:02,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-12-02 18:54:02,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075988935] [2023-12-02 18:54:02,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:54:02,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:54:02,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:54:02,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:54:02,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:54:02,498 INFO L87 Difference]: Start difference. First operand 6131 states and 9575 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-12-02 18:54:03,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:54:03,804 INFO L93 Difference]: Finished difference Result 16209 states and 26464 transitions. [2023-12-02 18:54:03,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:54:03,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 108 [2023-12-02 18:54:03,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:54:03,850 INFO L225 Difference]: With dead ends: 16209 [2023-12-02 18:54:03,850 INFO L226 Difference]: Without dead ends: 10093 [2023-12-02 18:54:03,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:54:03,877 INFO L413 NwaCegarLoop]: 691 mSDtfsCounter, 610 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 2107 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:54:03,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 2107 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 18:54:03,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10093 states. [2023-12-02 18:54:04,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10093 to 9918. [2023-12-02 18:54:04,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9918 states, 7421 states have (on average 1.4888828998787225) internal successors, (11049), 7559 states have internal predecessors, (11049), 1840 states have call successors, (1840), 522 states have call predecessors, (1840), 656 states have return successors, (2829), 1896 states have call predecessors, (2829), 1820 states have call successors, (2829) [2023-12-02 18:54:04,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9918 states to 9918 states and 15718 transitions. [2023-12-02 18:54:04,672 INFO L78 Accepts]: Start accepts. Automaton has 9918 states and 15718 transitions. Word has length 108 [2023-12-02 18:54:04,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:54:04,673 INFO L495 AbstractCegarLoop]: Abstraction has 9918 states and 15718 transitions. [2023-12-02 18:54:04,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-12-02 18:54:04,673 INFO L276 IsEmpty]: Start isEmpty. Operand 9918 states and 15718 transitions. [2023-12-02 18:54:04,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-02 18:54:04,677 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:54:04,677 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:54:04,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 18:54:04,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 18:54:04,878 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:54:04,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:54:04,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1314138627, now seen corresponding path program 1 times [2023-12-02 18:54:04,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:54:04,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876653044] [2023-12-02 18:54:04,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:54:04,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:54:04,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:54:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:54:05,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:54:05,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876653044] [2023-12-02 18:54:05,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876653044] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:54:05,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162912233] [2023-12-02 18:54:05,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:54:05,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:54:05,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:54:05,125 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:54:05,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 18:54:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:54:05,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:54:05,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:54:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 18:54:05,586 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:54:05,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162912233] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:54:05,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:54:05,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-12-02 18:54:05,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065456904] [2023-12-02 18:54:05,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:54:05,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:54:05,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:54:05,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:54:05,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:54:05,588 INFO L87 Difference]: Start difference. First operand 9918 states and 15718 transitions. Second operand has 6 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-12-02 18:54:07,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:54:07,192 INFO L93 Difference]: Finished difference Result 22311 states and 36077 transitions. [2023-12-02 18:54:07,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:54:07,193 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 109 [2023-12-02 18:54:07,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:54:07,278 INFO L225 Difference]: With dead ends: 22311 [2023-12-02 18:54:07,278 INFO L226 Difference]: Without dead ends: 12408 [2023-12-02 18:54:07,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-12-02 18:54:07,334 INFO L413 NwaCegarLoop]: 829 mSDtfsCounter, 689 mSDsluCounter, 2703 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 3532 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:54:07,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 3532 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 18:54:07,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12408 states. [2023-12-02 18:54:08,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12408 to 12321. [2023-12-02 18:54:08,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12321 states, 9248 states have (on average 1.4726427335640138) internal successors, (13619), 9445 states have internal predecessors, (13619), 2157 states have call successors, (2157), 732 states have call predecessors, (2157), 915 states have return successors, (4390), 2203 states have call predecessors, (4390), 2121 states have call successors, (4390) [2023-12-02 18:54:08,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12321 states to 12321 states and 20166 transitions. [2023-12-02 18:54:08,195 INFO L78 Accepts]: Start accepts. Automaton has 12321 states and 20166 transitions. Word has length 109 [2023-12-02 18:54:08,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:54:08,195 INFO L495 AbstractCegarLoop]: Abstraction has 12321 states and 20166 transitions. [2023-12-02 18:54:08,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2023-12-02 18:54:08,196 INFO L276 IsEmpty]: Start isEmpty. Operand 12321 states and 20166 transitions. [2023-12-02 18:54:08,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-02 18:54:08,200 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:54:08,200 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:54:08,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 18:54:08,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 18:54:08,401 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:54:08,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:54:08,401 INFO L85 PathProgramCache]: Analyzing trace with hash 663651978, now seen corresponding path program 1 times [2023-12-02 18:54:08,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:54:08,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789015734] [2023-12-02 18:54:08,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:54:08,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:54:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:54:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 18:54:08,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:54:08,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789015734] [2023-12-02 18:54:08,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789015734] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:54:08,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388962343] [2023-12-02 18:54:08,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:54:08,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:54:08,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:54:08,567 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:54:08,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 18:54:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:54:08,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:54:08,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:54:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:54:08,917 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:54:08,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388962343] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:54:08,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:54:08,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-12-02 18:54:08,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563413147] [2023-12-02 18:54:08,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:54:08,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:54:08,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:54:08,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:54:08,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:54:08,919 INFO L87 Difference]: Start difference. First operand 12321 states and 20166 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 18:54:09,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:54:09,868 INFO L93 Difference]: Finished difference Result 25045 states and 41940 transitions. [2023-12-02 18:54:09,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:54:09,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 109 [2023-12-02 18:54:09,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:54:09,954 INFO L225 Difference]: With dead ends: 25045 [2023-12-02 18:54:09,954 INFO L226 Difference]: Without dead ends: 12747 [2023-12-02 18:54:10,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:54:10,060 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 1 mSDsluCounter, 1818 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2429 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:54:10,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2429 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:54:10,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12747 states. [2023-12-02 18:54:10,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12747 to 12539. [2023-12-02 18:54:10,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12539 states, 9439 states have (on average 1.4630787159656744) internal successors, (13810), 9581 states have internal predecessors, (13810), 2157 states have call successors, (2157), 732 states have call predecessors, (2157), 942 states have return successors, (4472), 2285 states have call predecessors, (4472), 2121 states have call successors, (4472) [2023-12-02 18:54:10,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12539 states to 12539 states and 20439 transitions. [2023-12-02 18:54:10,879 INFO L78 Accepts]: Start accepts. Automaton has 12539 states and 20439 transitions. Word has length 109 [2023-12-02 18:54:10,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:54:10,879 INFO L495 AbstractCegarLoop]: Abstraction has 12539 states and 20439 transitions. [2023-12-02 18:54:10,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 18:54:10,880 INFO L276 IsEmpty]: Start isEmpty. Operand 12539 states and 20439 transitions. [2023-12-02 18:54:10,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 18:54:10,883 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:54:10,883 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:54:10,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 18:54:11,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 18:54:11,084 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:54:11,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:54:11,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1064949044, now seen corresponding path program 1 times [2023-12-02 18:54:11,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:54:11,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153417885] [2023-12-02 18:54:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:54:11,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:54:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:54:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 18:54:11,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:54:11,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153417885] [2023-12-02 18:54:11,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153417885] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:54:11,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293274040] [2023-12-02 18:54:11,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:54:11,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:54:11,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:54:11,240 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:54:11,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 18:54:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:54:11,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 1600 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:54:11,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:54:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:54:11,601 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:54:11,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293274040] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:54:11,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:54:11,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-12-02 18:54:11,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731928523] [2023-12-02 18:54:11,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:54:11,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:54:11,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:54:11,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:54:11,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:54:11,602 INFO L87 Difference]: Start difference. First operand 12539 states and 20439 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 18:54:12,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:54:12,684 INFO L93 Difference]: Finished difference Result 25671 states and 43113 transitions. [2023-12-02 18:54:12,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:54:12,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 112 [2023-12-02 18:54:12,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:54:12,765 INFO L225 Difference]: With dead ends: 25671 [2023-12-02 18:54:12,765 INFO L226 Difference]: Without dead ends: 13156 [2023-12-02 18:54:12,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:54:12,883 INFO L413 NwaCegarLoop]: 599 mSDtfsCounter, 19 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1667 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:54:12,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1667 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:54:12,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13156 states. [2023-12-02 18:54:13,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13156 to 13018. [2023-12-02 18:54:13,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13018 states, 9918 states have (on average 1.4713651945956847) internal successors, (14593), 10060 states have internal predecessors, (14593), 2157 states have call successors, (2157), 732 states have call predecessors, (2157), 942 states have return successors, (4472), 2285 states have call predecessors, (4472), 2121 states have call successors, (4472) [2023-12-02 18:54:13,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13018 states to 13018 states and 21222 transitions. [2023-12-02 18:54:13,948 INFO L78 Accepts]: Start accepts. Automaton has 13018 states and 21222 transitions. Word has length 112 [2023-12-02 18:54:13,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:54:13,948 INFO L495 AbstractCegarLoop]: Abstraction has 13018 states and 21222 transitions. [2023-12-02 18:54:13,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 18:54:13,949 INFO L276 IsEmpty]: Start isEmpty. Operand 13018 states and 21222 transitions. [2023-12-02 18:54:13,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 18:54:13,954 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:54:13,954 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:54:13,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 18:54:14,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 18:54:14,155 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:54:14,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:54:14,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1403234069, now seen corresponding path program 1 times [2023-12-02 18:54:14,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:54:14,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460684514] [2023-12-02 18:54:14,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:54:14,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:54:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:54:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 18:54:14,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:54:14,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460684514] [2023-12-02 18:54:14,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460684514] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:54:14,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097807823] [2023-12-02 18:54:14,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:54:14,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:54:14,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:54:14,335 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:54:14,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 18:54:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:54:14,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:54:14,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:54:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:54:14,740 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:54:14,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097807823] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:54:14,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:54:14,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-12-02 18:54:14,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884205954] [2023-12-02 18:54:14,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:54:14,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:54:14,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:54:14,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:54:14,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:54:14,742 INFO L87 Difference]: Start difference. First operand 13018 states and 21222 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-12-02 18:54:16,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:54:16,859 INFO L93 Difference]: Finished difference Result 34053 states and 59542 transitions. [2023-12-02 18:54:16,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:54:16,860 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 113 [2023-12-02 18:54:16,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:54:16,949 INFO L225 Difference]: With dead ends: 34053 [2023-12-02 18:54:16,950 INFO L226 Difference]: Without dead ends: 22344 [2023-12-02 18:54:17,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:54:17,042 INFO L413 NwaCegarLoop]: 722 mSDtfsCounter, 632 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:54:17,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 1991 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 18:54:17,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22344 states. [2023-12-02 18:54:18,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22344 to 21657. [2023-12-02 18:54:18,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21657 states, 16515 states have (on average 1.470541931577354) internal successors, (24286), 16747 states have internal predecessors, (24286), 3611 states have call successors, (3611), 1220 states have call predecessors, (3611), 1530 states have return successors, (9320), 3797 states have call predecessors, (9320), 3550 states have call successors, (9320) [2023-12-02 18:54:18,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21657 states to 21657 states and 37217 transitions. [2023-12-02 18:54:18,336 INFO L78 Accepts]: Start accepts. Automaton has 21657 states and 37217 transitions. Word has length 113 [2023-12-02 18:54:18,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:54:18,336 INFO L495 AbstractCegarLoop]: Abstraction has 21657 states and 37217 transitions. [2023-12-02 18:54:18,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-12-02 18:54:18,336 INFO L276 IsEmpty]: Start isEmpty. Operand 21657 states and 37217 transitions. [2023-12-02 18:54:18,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 18:54:18,339 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:54:18,339 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:54:18,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 18:54:18,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 18:54:18,540 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:54:18,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:54:18,540 INFO L85 PathProgramCache]: Analyzing trace with hash 626428117, now seen corresponding path program 1 times [2023-12-02 18:54:18,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:54:18,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875982333] [2023-12-02 18:54:18,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:54:18,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:54:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:54:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 18:54:18,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:54:18,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875982333] [2023-12-02 18:54:18,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875982333] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:54:18,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752927341] [2023-12-02 18:54:18,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:54:18,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:54:18,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:54:18,698 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:54:18,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 18:54:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:54:19,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 1600 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:54:19,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:54:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 18:54:19,110 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:54:19,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752927341] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:54:19,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:54:19,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-12-02 18:54:19,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569032913] [2023-12-02 18:54:19,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:54:19,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:54:19,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:54:19,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:54:19,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:54:19,113 INFO L87 Difference]: Start difference. First operand 21657 states and 37217 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 18:54:21,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:54:21,276 INFO L93 Difference]: Finished difference Result 43874 states and 78989 transitions. [2023-12-02 18:54:21,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:54:21,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 113 [2023-12-02 18:54:21,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:54:21,420 INFO L225 Difference]: With dead ends: 43874 [2023-12-02 18:54:21,420 INFO L226 Difference]: Without dead ends: 22241 [2023-12-02 18:54:21,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:54:21,736 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 4 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:54:21,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1801 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:54:21,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22241 states. [2023-12-02 18:54:23,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22241 to 21743. [2023-12-02 18:54:23,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21743 states, 16601 states have (on average 1.4581049334377447) internal successors, (24206), 16833 states have internal predecessors, (24206), 3611 states have call successors, (3611), 1220 states have call predecessors, (3611), 1530 states have return successors, (9320), 3797 states have call predecessors, (9320), 3550 states have call successors, (9320) [2023-12-02 18:54:23,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21743 states to 21743 states and 37137 transitions. [2023-12-02 18:54:23,529 INFO L78 Accepts]: Start accepts. Automaton has 21743 states and 37137 transitions. Word has length 113 [2023-12-02 18:54:23,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:54:23,529 INFO L495 AbstractCegarLoop]: Abstraction has 21743 states and 37137 transitions. [2023-12-02 18:54:23,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 18:54:23,529 INFO L276 IsEmpty]: Start isEmpty. Operand 21743 states and 37137 transitions. [2023-12-02 18:54:23,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-02 18:54:23,532 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:54:23,532 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:54:23,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 18:54:23,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 18:54:23,733 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:54:23,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:54:23,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1541755930, now seen corresponding path program 1 times [2023-12-02 18:54:23,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:54:23,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721847106] [2023-12-02 18:54:23,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:54:23,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:54:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:54:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 18:54:23,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:54:23,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721847106] [2023-12-02 18:54:23,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721847106] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:54:23,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362846432] [2023-12-02 18:54:23,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:54:23,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:54:23,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:54:23,928 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:54:23,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 18:54:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:54:24,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:54:24,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:54:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:54:24,247 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:54:24,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362846432] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:54:24,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:54:24,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-12-02 18:54:24,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243767935] [2023-12-02 18:54:24,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:54:24,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:54:24,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:54:24,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:54:24,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:54:24,249 INFO L87 Difference]: Start difference. First operand 21743 states and 37137 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-12-02 18:54:27,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:54:27,243 INFO L93 Difference]: Finished difference Result 51399 states and 92803 transitions. [2023-12-02 18:54:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:54:27,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 114 [2023-12-02 18:54:27,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:54:27,437 INFO L225 Difference]: With dead ends: 51399 [2023-12-02 18:54:27,437 INFO L226 Difference]: Without dead ends: 30993 [2023-12-02 18:54:27,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:54:27,692 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 651 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 1984 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:54:27,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 1984 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 18:54:27,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30993 states. [2023-12-02 18:54:29,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30993 to 30358. [2023-12-02 18:54:29,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30358 states, 23176 states have (on average 1.458620987228167) internal successors, (33805), 23498 states have internal predecessors, (33805), 5065 states have call successors, (5065), 1706 states have call predecessors, (5065), 2116 states have return successors, (15524), 5309 states have call predecessors, (15524), 4979 states have call successors, (15524) [2023-12-02 18:54:29,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30358 states to 30358 states and 54394 transitions. [2023-12-02 18:54:29,872 INFO L78 Accepts]: Start accepts. Automaton has 30358 states and 54394 transitions. Word has length 114 [2023-12-02 18:54:29,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:54:29,873 INFO L495 AbstractCegarLoop]: Abstraction has 30358 states and 54394 transitions. [2023-12-02 18:54:29,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-12-02 18:54:29,873 INFO L276 IsEmpty]: Start isEmpty. Operand 30358 states and 54394 transitions. [2023-12-02 18:54:29,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-02 18:54:29,876 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:54:29,876 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:54:29,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 18:54:30,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:54:30,077 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:54:30,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:54:30,077 INFO L85 PathProgramCache]: Analyzing trace with hash -446692735, now seen corresponding path program 1 times [2023-12-02 18:54:30,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:54:30,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191561036] [2023-12-02 18:54:30,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:54:30,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:54:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:54:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 18:54:30,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:54:30,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191561036] [2023-12-02 18:54:30,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191561036] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:54:30,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796176097] [2023-12-02 18:54:30,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:54:30,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:54:30,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:54:30,228 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:54:30,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 18:54:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:54:30,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:54:30,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:54:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:54:30,719 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:54:30,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796176097] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:54:30,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:54:30,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-12-02 18:54:30,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603121998] [2023-12-02 18:54:30,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:54:30,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:54:30,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:54:30,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:54:30,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:54:30,722 INFO L87 Difference]: Start difference. First operand 30358 states and 54394 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-12-02 18:54:35,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:54:35,059 INFO L93 Difference]: Finished difference Result 66656 states and 123966 transitions. [2023-12-02 18:54:35,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:54:35,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 115 [2023-12-02 18:54:35,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:54:35,226 INFO L225 Difference]: With dead ends: 66656 [2023-12-02 18:54:35,227 INFO L226 Difference]: Without dead ends: 37657 [2023-12-02 18:54:35,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:54:35,725 INFO L413 NwaCegarLoop]: 720 mSDtfsCounter, 651 mSDsluCounter, 1440 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 2160 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:54:35,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 2160 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 18:54:35,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37657 states. [2023-12-02 18:54:38,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37657 to 36376. [2023-12-02 18:54:38,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36376 states, 27565 states have (on average 1.4610194086704154) internal successors, (40273), 28015 states have internal predecessors, (40273), 6262 states have call successors, (6262), 2106 states have call predecessors, (6262), 2548 states have return successors, (20609), 6458 states have call predecessors, (20609), 6159 states have call successors, (20609) [2023-12-02 18:54:39,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36376 states to 36376 states and 67144 transitions. [2023-12-02 18:54:39,009 INFO L78 Accepts]: Start accepts. Automaton has 36376 states and 67144 transitions. Word has length 115 [2023-12-02 18:54:39,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:54:39,010 INFO L495 AbstractCegarLoop]: Abstraction has 36376 states and 67144 transitions. [2023-12-02 18:54:39,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-12-02 18:54:39,010 INFO L276 IsEmpty]: Start isEmpty. Operand 36376 states and 67144 transitions. [2023-12-02 18:54:39,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-12-02 18:54:39,015 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:54:39,015 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:54:39,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 18:54:39,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:54:39,215 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:54:39,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:54:39,216 INFO L85 PathProgramCache]: Analyzing trace with hash 62160566, now seen corresponding path program 1 times [2023-12-02 18:54:39,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:54:39,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620788380] [2023-12-02 18:54:39,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:54:39,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:54:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:54:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:54:39,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:54:39,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620788380] [2023-12-02 18:54:39,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620788380] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:54:39,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943060110] [2023-12-02 18:54:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:54:39,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:54:39,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:54:39,435 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:54:39,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 18:54:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:54:39,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:54:39,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:54:39,789 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:54:39,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:54:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 18:54:39,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943060110] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:54:39,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1743204088] [2023-12-02 18:54:39,997 INFO L159 IcfgInterpreter]: Started Sifa with 103 locations of interest [2023-12-02 18:54:39,997 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:54:40,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:54:40,006 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:54:40,007 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:54:58,906 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 576 for LOIs [2023-12-02 18:55:32,805 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__twothirdsfull with input of size 572 for LOIs [2023-12-02 18:55:33,749 INFO L197 IcfgInterpreter]: Interpreting procedure existInLiftCallsInDirection with input of size 483 for LOIs [2023-12-02 18:55:44,605 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 439 for LOIs [2023-12-02 18:55:45,077 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 542 for LOIs [2023-12-02 18:55:56,687 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 624 for LOIs [2023-12-02 18:56:02,056 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 516 for LOIs [2023-12-02 18:56:04,012 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:56:20,767 WARN L293 SmtUtils]: Spent 7.35s on a formula simplification. DAG size of input: 560 DAG size of output: 526 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:56:42,914 WARN L293 SmtUtils]: Spent 13.58s on a formula simplification. DAG size of input: 624 DAG size of output: 588 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:57:00,025 WARN L293 SmtUtils]: Spent 16.51s on a formula simplification. DAG size of input: 877 DAG size of output: 676 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:58:07,154 WARN L293 SmtUtils]: Spent 8.62s on a formula simplification. DAG size of input: 520 DAG size of output: 516 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:58:15,864 WARN L293 SmtUtils]: Spent 8.36s on a formula simplification. DAG size of input: 526 DAG size of output: 522 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:58:25,197 WARN L293 SmtUtils]: Spent 8.88s on a formula simplification. DAG size of input: 529 DAG size of output: 525 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:58:33,622 WARN L293 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 483 DAG size of output: 479 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:58:42,368 WARN L293 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 485 DAG size of output: 481 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:58:50,781 WARN L293 SmtUtils]: Spent 7.97s on a formula simplification. DAG size of input: 488 DAG size of output: 484 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:58:59,276 WARN L293 SmtUtils]: Spent 7.83s on a formula simplification. DAG size of input: 489 DAG size of output: 460 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:59:08,245 WARN L293 SmtUtils]: Spent 8.27s on a formula simplification. DAG size of input: 493 DAG size of output: 464 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:59:17,374 WARN L293 SmtUtils]: Spent 8.40s on a formula simplification. DAG size of input: 532 DAG size of output: 503 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:59:26,719 WARN L293 SmtUtils]: Spent 8.59s on a formula simplification. DAG size of input: 532 DAG size of output: 503 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:59:26,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1743204088] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:59:26,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:59:26,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [5, 6, 7] total 45 [2023-12-02 18:59:26,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936221313] [2023-12-02 18:59:26,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:59:26,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-02 18:59:26,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:59:26,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-02 18:59:26,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1760, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 18:59:26,733 INFO L87 Difference]: Start difference. First operand 36376 states and 67144 transitions. Second operand has 33 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 21 states have internal predecessors, (73), 10 states have call successors, (19), 8 states have call predecessors, (19), 6 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2023-12-02 19:00:43,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:00:43,923 INFO L93 Difference]: Finished difference Result 72824 states and 134424 transitions. [2023-12-02 19:00:43,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 19:00:43,924 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 21 states have internal predecessors, (73), 10 states have call successors, (19), 8 states have call predecessors, (19), 6 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) Word has length 117 [2023-12-02 19:00:43,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:00:44,140 INFO L225 Difference]: With dead ends: 72824 [2023-12-02 19:00:44,140 INFO L226 Difference]: Without dead ends: 36471 [2023-12-02 19:00:44,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 226.6s TimeCoverageRelationStatistics Valid=258, Invalid=2192, Unknown=0, NotChecked=0, Total=2450 [2023-12-02 19:00:44,431 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 109 mSDsluCounter, 3400 mSDsCounter, 0 mSdLazyCounter, 7674 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 3945 SdHoareTripleChecker+Invalid, 7700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 7674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.3s IncrementalHoareTripleChecker+Time [2023-12-02 19:00:44,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 3945 Invalid, 7700 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [26 Valid, 7674 Invalid, 0 Unknown, 0 Unchecked, 50.3s Time] [2023-12-02 19:00:44,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36471 states. [2023-12-02 19:00:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36471 to 36404. [2023-12-02 19:00:47,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36404 states, 27586 states have (on average 1.4607409555571667) internal successors, (40296), 28035 states have internal predecessors, (40296), 6265 states have call successors, (6265), 2111 states have call predecessors, (6265), 2552 states have return successors, (20614), 6461 states have call predecessors, (20614), 6162 states have call successors, (20614) [2023-12-02 19:00:47,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36404 states to 36404 states and 67175 transitions. [2023-12-02 19:00:47,843 INFO L78 Accepts]: Start accepts. Automaton has 36404 states and 67175 transitions. Word has length 117 [2023-12-02 19:00:47,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:00:47,844 INFO L495 AbstractCegarLoop]: Abstraction has 36404 states and 67175 transitions. [2023-12-02 19:00:47,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 21 states have internal predecessors, (73), 10 states have call successors, (19), 8 states have call predecessors, (19), 6 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2023-12-02 19:00:47,844 INFO L276 IsEmpty]: Start isEmpty. Operand 36404 states and 67175 transitions. [2023-12-02 19:00:47,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-02 19:00:47,849 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:00:47,849 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:00:47,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 19:00:48,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:00:48,050 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:00:48,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:00:48,050 INFO L85 PathProgramCache]: Analyzing trace with hash -106539192, now seen corresponding path program 1 times [2023-12-02 19:00:48,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:00:48,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408169441] [2023-12-02 19:00:48,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:00:48,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:00:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:00:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 19:00:48,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:00:48,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408169441] [2023-12-02 19:00:48,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408169441] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:00:48,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:00:48,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 19:00:48,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000938569] [2023-12-02 19:00:48,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:00:48,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:00:48,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:00:48,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:00:48,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:00:48,301 INFO L87 Difference]: Start difference. First operand 36404 states and 67175 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 19:00:52,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:00:52,180 INFO L93 Difference]: Finished difference Result 76180 states and 147335 transitions. [2023-12-02 19:00:52,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:00:52,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 119 [2023-12-02 19:00:52,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:00:52,419 INFO L225 Difference]: With dead ends: 76180 [2023-12-02 19:00:52,419 INFO L226 Difference]: Without dead ends: 40714 [2023-12-02 19:00:53,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:00:53,079 INFO L413 NwaCegarLoop]: 649 mSDtfsCounter, 177 mSDsluCounter, 1855 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2504 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:00:53,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2504 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:00:53,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40714 states. [2023-12-02 19:00:55,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40714 to 36560. [2023-12-02 19:00:56,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36560 states, 27742 states have (on average 1.4581500973253552) internal successors, (40452), 28191 states have internal predecessors, (40452), 6265 states have call successors, (6265), 2111 states have call predecessors, (6265), 2552 states have return successors, (20614), 6461 states have call predecessors, (20614), 6162 states have call successors, (20614) [2023-12-02 19:00:56,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36560 states to 36560 states and 67331 transitions. [2023-12-02 19:00:56,427 INFO L78 Accepts]: Start accepts. Automaton has 36560 states and 67331 transitions. Word has length 119 [2023-12-02 19:00:56,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:00:56,427 INFO L495 AbstractCegarLoop]: Abstraction has 36560 states and 67331 transitions. [2023-12-02 19:00:56,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 19:00:56,427 INFO L276 IsEmpty]: Start isEmpty. Operand 36560 states and 67331 transitions. [2023-12-02 19:00:56,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 19:00:56,431 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:00:56,431 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:00:56,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-02 19:00:56,432 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:00:56,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:00:56,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1418280514, now seen corresponding path program 1 times [2023-12-02 19:00:56,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:00:56,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982555134] [2023-12-02 19:00:56,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:00:56,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:00:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:00:56,562 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 19:00:56,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:00:56,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982555134] [2023-12-02 19:00:56,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982555134] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:00:56,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747283402] [2023-12-02 19:00:56,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:00:56,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:00:56,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:00:56,564 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:00:56,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36c7d44d-3d3d-479d-8715-19a6a6567724/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 19:00:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:00:56,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 1614 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:00:56,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:00:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 19:00:56,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:00:57,198 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 19:00:57,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747283402] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:00:57,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [240834254] [2023-12-02 19:00:57,204 INFO L159 IcfgInterpreter]: Started Sifa with 107 locations of interest [2023-12-02 19:00:57,204 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:00:57,205 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:00:57,205 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:00:57,205 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:01:16,389 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 576 for LOIs [2023-12-02 19:01:49,555 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__twothirdsfull with input of size 572 for LOIs [2023-12-02 19:02:18,435 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 447 for LOIs [2023-12-02 19:02:19,015 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 443 for LOIs [2023-12-02 19:02:19,493 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 441 for LOIs [2023-12-02 19:02:19,901 INFO L197 IcfgInterpreter]: Interpreting procedure existInLiftCallsInDirection with input of size 475 for LOIs [2023-12-02 19:02:30,892 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 453 for LOIs [2023-12-02 19:02:35,728 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 449 for LOIs [2023-12-02 19:02:36,222 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 439 for LOIs [2023-12-02 19:02:36,623 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 542 for LOIs [2023-12-02 19:02:49,147 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 624 for LOIs [2023-12-02 19:02:54,560 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 516 for LOIs [2023-12-02 19:02:56,476 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:03:12,663 WARN L293 SmtUtils]: Spent 7.34s on a formula simplification. DAG size of input: 560 DAG size of output: 526 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:03:35,774 WARN L293 SmtUtils]: Spent 14.57s on a formula simplification. DAG size of input: 624 DAG size of output: 588 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:03:52,872 WARN L293 SmtUtils]: Spent 16.42s on a formula simplification. DAG size of input: 877 DAG size of output: 676 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:04:35,712 WARN L293 SmtUtils]: Spent 5.05s on a formula simplification that was a NOOP. DAG size: 578 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:06:03,395 WARN L293 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 589 DAG size of output: 586 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:06:31,333 WARN L293 SmtUtils]: Spent 10.43s on a formula simplification. DAG size of input: 631 DAG size of output: 624 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:06:39,197 WARN L293 SmtUtils]: Spent 7.33s on a formula simplification. DAG size of input: 512 DAG size of output: 508 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:06:47,178 WARN L293 SmtUtils]: Spent 7.40s on a formula simplification. DAG size of input: 518 DAG size of output: 514 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:06:55,389 WARN L293 SmtUtils]: Spent 7.64s on a formula simplification. DAG size of input: 521 DAG size of output: 517 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 19:07:03,145 WARN L293 SmtUtils]: Spent 7.16s on a formula simplification. DAG size of input: 475 DAG size of output: 471 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)