./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91 --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 63ce65fdf446745f64534f105010543d07f1d807cf17249eadefb49fdfafb832 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:58:48,027 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:58:48,144 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:58:48,157 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:58:48,158 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:58:48,200 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:58:48,201 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:58:48,202 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:58:48,203 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:58:48,208 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:58:48,209 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:58:48,210 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:58:48,211 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:58:48,213 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:58:48,214 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:58:48,214 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:58:48,215 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:58:48,215 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:58:48,216 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:58:48,216 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:58:48,217 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:58:48,218 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:58:48,219 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:58:48,220 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:58:48,220 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:58:48,221 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:58:48,221 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:58:48,222 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:58:48,222 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:58:48,223 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:58:48,225 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:58:48,225 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:58:48,225 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:58:48,226 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:58:48,226 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:58:48,227 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:58:48,227 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:58:48,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:58:48,228 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:58:48,228 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:58:48,228 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:58:48,229 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:58:48,229 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:58:48,229 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:58:48,230 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:58:48,230 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:58:48,230 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:58:48,231 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_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63ce65fdf446745f64534f105010543d07f1d807cf17249eadefb49fdfafb832 [2023-11-24 23:58:48,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:58:48,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:58:48,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:58:48,577 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:58:48,578 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:58:48,579 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c [2023-11-24 23:58:51,668 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:58:52,101 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:58:52,102 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c [2023-11-24 23:58:52,130 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/data/a150e5eff/50e3d5ee64bf4fe59cc2d6acb3bb58c8/FLAG88a560e73 [2023-11-24 23:58:52,145 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/data/a150e5eff/50e3d5ee64bf4fe59cc2d6acb3bb58c8 [2023-11-24 23:58:52,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:58:52,153 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:58:52,157 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:58:52,157 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:58:52,162 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:58:52,163 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:58:52" (1/1) ... [2023-11-24 23:58:52,164 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68c4768a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:52, skipping insertion in model container [2023-11-24 23:58:52,165 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:58:52" (1/1) ... [2023-11-24 23:58:52,271 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:58:52,750 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_18b70cc9-593b-4691-8075-81c47fbae90a/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2023-11-24 23:58:52,908 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:58:52,937 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:58:52,947 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [48] [2023-11-24 23:58:52,949 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [716] [2023-11-24 23:58:52,949 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [736] [2023-11-24 23:58:52,950 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [857] [2023-11-24 23:58:52,950 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification13_spec.i","") [2398] [2023-11-24 23:58:52,950 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [2488] [2023-11-24 23:58:52,950 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [2497] [2023-11-24 23:58:52,951 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2589] [2023-11-24 23:58:52,951 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [2940] [2023-11-24 23:58:52,951 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [2975] [2023-11-24 23:58:53,096 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_18b70cc9-593b-4691-8075-81c47fbae90a/sv-benchmarks/c/product-lines/elevator_spec13_product29.cil.c[54440,54453] [2023-11-24 23:58:53,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:58:53,175 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:58:53,176 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:53 WrapperNode [2023-11-24 23:58:53,176 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:58:53,177 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:58:53,177 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:58:53,177 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:58:53,186 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:53" (1/1) ... [2023-11-24 23:58:53,238 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:53" (1/1) ... [2023-11-24 23:58:53,317 INFO L138 Inliner]: procedures = 91, calls = 340, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 861 [2023-11-24 23:58:53,317 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:58:53,318 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:58:53,318 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:58:53,318 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:58:53,338 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:53" (1/1) ... [2023-11-24 23:58:53,339 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:53" (1/1) ... [2023-11-24 23:58:53,352 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:53" (1/1) ... [2023-11-24 23:58:53,352 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:53" (1/1) ... [2023-11-24 23:58:53,388 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:53" (1/1) ... [2023-11-24 23:58:53,402 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:53" (1/1) ... [2023-11-24 23:58:53,407 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:53" (1/1) ... [2023-11-24 23:58:53,414 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:53" (1/1) ... [2023-11-24 23:58:53,424 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:58:53,425 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:58:53,425 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:58:53,426 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:58:53,426 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:53" (1/1) ... [2023-11-24 23:58:53,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:58:53,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:58:53,470 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:58:53,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:58:53,510 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2023-11-24 23:58:53,511 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2023-11-24 23:58:53,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:58:53,511 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2023-11-24 23:58:53,511 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2023-11-24 23:58:53,512 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-11-24 23:58:53,512 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-11-24 23:58:53,513 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2023-11-24 23:58:53,513 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2023-11-24 23:58:53,513 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-24 23:58:53,513 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-24 23:58:53,513 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-24 23:58:53,514 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-24 23:58:53,515 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2023-11-24 23:58:53,515 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2023-11-24 23:58:53,515 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-24 23:58:53,517 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-24 23:58:53,518 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-11-24 23:58:53,518 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-11-24 23:58:53,518 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-24 23:58:53,518 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-24 23:58:53,518 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-24 23:58:53,519 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-24 23:58:53,519 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-24 23:58:53,520 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-24 23:58:53,520 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-24 23:58:53,520 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-24 23:58:53,520 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-24 23:58:53,520 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-24 23:58:53,520 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-24 23:58:53,521 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-24 23:58:53,521 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-24 23:58:53,521 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-24 23:58:53,521 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-24 23:58:53,521 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-24 23:58:53,521 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-24 23:58:53,521 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-24 23:58:53,522 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-24 23:58:53,522 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-24 23:58:53,522 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-24 23:58:53,522 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-24 23:58:53,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:58:53,522 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-11-24 23:58:53,523 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-11-24 23:58:53,523 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-24 23:58:53,523 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-24 23:58:53,523 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-24 23:58:53,524 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-24 23:58:53,524 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-24 23:58:53,525 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-24 23:58:53,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:58:53,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:58:53,526 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-24 23:58:53,526 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-24 23:58:53,675 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:58:53,678 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:58:55,076 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:58:56,112 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:58:56,112 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-24 23:58:56,114 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:58:56 BoogieIcfgContainer [2023-11-24 23:58:56,114 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:58:56,117 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:58:56,118 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:58:56,121 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:58:56,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:58:52" (1/3) ... [2023-11-24 23:58:56,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@697e448f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:58:56, skipping insertion in model container [2023-11-24 23:58:56,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:58:53" (2/3) ... [2023-11-24 23:58:56,124 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@697e448f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:58:56, skipping insertion in model container [2023-11-24 23:58:56,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:58:56" (3/3) ... [2023-11-24 23:58:56,126 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product29.cil.c [2023-11-24 23:58:56,150 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:58:56,151 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:58:56,241 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:58:56,249 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;@1a2f3d68, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:58:56,250 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:58:56,257 INFO L276 IsEmpty]: Start isEmpty. Operand has 409 states, 282 states have (on average 1.599290780141844) internal successors, (451), 300 states have internal predecessors, (451), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-24 23:58:56,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-24 23:58:56,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:56,292 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] [2023-11-24 23:58:56,293 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:58:56,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:56,301 INFO L85 PathProgramCache]: Analyzing trace with hash -450207036, now seen corresponding path program 1 times [2023-11-24 23:58:56,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:56,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013681810] [2023-11-24 23:58:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:56,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:58:57,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:57,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013681810] [2023-11-24 23:58:57,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013681810] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:57,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:58:57,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:58:57,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136081818] [2023-11-24 23:58:57,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:57,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:58:57,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:57,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:58:57,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:58:57,428 INFO L87 Difference]: Start difference. First operand has 409 states, 282 states have (on average 1.599290780141844) internal successors, (451), 300 states have internal predecessors, (451), 100 states have call successors, (100), 25 states have call predecessors, (100), 25 states have return successors, (100), 97 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-24 23:58:58,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:58,467 INFO L93 Difference]: Finished difference Result 1204 states and 1950 transitions. [2023-11-24 23:58:58,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 23:58:58,470 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2023-11-24 23:58:58,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:58,506 INFO L225 Difference]: With dead ends: 1204 [2023-11-24 23:58:58,506 INFO L226 Difference]: Without dead ends: 800 [2023-11-24 23:58:58,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-24 23:58:58,524 INFO L413 NwaCegarLoop]: 754 mSDtfsCounter, 1011 mSDsluCounter, 3372 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 4126 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:58,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1025 Valid, 4126 Invalid, 454 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [61 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:58:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2023-11-24 23:58:58,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 784. [2023-11-24 23:58:58,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 549 states have (on average 1.5810564663023678) internal successors, (868), 576 states have internal predecessors, (868), 188 states have call successors, (188), 47 states have call predecessors, (188), 46 states have return successors, (193), 185 states have call predecessors, (193), 184 states have call successors, (193) [2023-11-24 23:58:58,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1249 transitions. [2023-11-24 23:58:58,702 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1249 transitions. Word has length 82 [2023-11-24 23:58:58,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:58,704 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1249 transitions. [2023-11-24 23:58:58,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-24 23:58:58,704 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1249 transitions. [2023-11-24 23:58:58,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-24 23:58:58,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:58,713 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] [2023-11-24 23:58:58,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:58:58,714 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:58:58,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:58,715 INFO L85 PathProgramCache]: Analyzing trace with hash 2027403963, now seen corresponding path program 1 times [2023-11-24 23:58:58,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:58,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697733620] [2023-11-24 23:58:58,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:58,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:58:59,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:58:59,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:58:59,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697733620] [2023-11-24 23:58:59,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697733620] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:58:59,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:58:59,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:58:59,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377922650] [2023-11-24 23:58:59,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:58:59,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:58:59,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:58:59,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:58:59,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:58:59,322 INFO L87 Difference]: Start difference. First operand 784 states and 1249 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-24 23:58:59,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:58:59,645 INFO L93 Difference]: Finished difference Result 1219 states and 1953 transitions. [2023-11-24 23:58:59,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:58:59,646 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 87 [2023-11-24 23:58:59,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:58:59,655 INFO L225 Difference]: With dead ends: 1219 [2023-11-24 23:58:59,656 INFO L226 Difference]: Without dead ends: 829 [2023-11-24 23:58:59,660 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 [2023-11-24 23:58:59,661 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 31 mSDsluCounter, 3155 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3800 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:58:59,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 3800 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:58:59,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2023-11-24 23:58:59,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 798. [2023-11-24 23:58:59,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 559 states have (on average 1.5706618962432917) internal successors, (878), 586 states have internal predecessors, (878), 188 states have call successors, (188), 47 states have call predecessors, (188), 50 states have return successors, (203), 189 states have call predecessors, (203), 184 states have call successors, (203) [2023-11-24 23:58:59,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1269 transitions. [2023-11-24 23:58:59,744 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1269 transitions. Word has length 87 [2023-11-24 23:58:59,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:58:59,744 INFO L495 AbstractCegarLoop]: Abstraction has 798 states and 1269 transitions. [2023-11-24 23:58:59,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-24 23:58:59,745 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1269 transitions. [2023-11-24 23:58:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-24 23:58:59,750 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:58:59,750 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] [2023-11-24 23:58:59,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:58:59,750 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:58:59,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:58:59,751 INFO L85 PathProgramCache]: Analyzing trace with hash 915472610, now seen corresponding path program 1 times [2023-11-24 23:58:59,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:58:59,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231176707] [2023-11-24 23:58:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:58:59,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:58:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:59:00,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:00,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231176707] [2023-11-24 23:59:00,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231176707] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:00,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:00,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:59:00,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807638156] [2023-11-24 23:59:00,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:00,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:59:00,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:00,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:59:00,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:59:00,224 INFO L87 Difference]: Start difference. First operand 798 states and 1269 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-24 23:59:00,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:00,498 INFO L93 Difference]: Finished difference Result 1236 states and 1975 transitions. [2023-11-24 23:59:00,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:59:00,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 86 [2023-11-24 23:59:00,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:00,506 INFO L225 Difference]: With dead ends: 1236 [2023-11-24 23:59:00,506 INFO L226 Difference]: Without dead ends: 839 [2023-11-24 23:59:00,509 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 [2023-11-24 23:59:00,511 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 32 mSDsluCounter, 3144 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3786 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:00,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 3786 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:59:00,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2023-11-24 23:59:00,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 800. [2023-11-24 23:59:00,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 561 states have (on average 1.5686274509803921) internal successors, (880), 586 states have internal predecessors, (880), 188 states have call successors, (188), 47 states have call predecessors, (188), 50 states have return successors, (203), 191 states have call predecessors, (203), 184 states have call successors, (203) [2023-11-24 23:59:00,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1271 transitions. [2023-11-24 23:59:00,573 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1271 transitions. Word has length 86 [2023-11-24 23:59:00,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:00,574 INFO L495 AbstractCegarLoop]: Abstraction has 800 states and 1271 transitions. [2023-11-24 23:59:00,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-24 23:59:00,575 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1271 transitions. [2023-11-24 23:59:00,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-24 23:59:00,578 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:00,579 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] [2023-11-24 23:59:00,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:59:00,579 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:59:00,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:00,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1353442459, now seen corresponding path program 1 times [2023-11-24 23:59:00,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:00,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170160647] [2023-11-24 23:59:00,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:00,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:59:00,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:00,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170160647] [2023-11-24 23:59:00,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170160647] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:00,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:00,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:59:00,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064556298] [2023-11-24 23:59:00,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:00,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:59:00,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:00,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:59:00,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:59:00,953 INFO L87 Difference]: Start difference. First operand 800 states and 1271 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-24 23:59:01,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:01,226 INFO L93 Difference]: Finished difference Result 1239 states and 1978 transitions. [2023-11-24 23:59:01,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:59:01,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 87 [2023-11-24 23:59:01,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:01,234 INFO L225 Difference]: With dead ends: 1239 [2023-11-24 23:59:01,234 INFO L226 Difference]: Without dead ends: 841 [2023-11-24 23:59:01,237 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 [2023-11-24 23:59:01,239 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 31 mSDsluCounter, 3155 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3800 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:01,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 3800 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:59:01,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2023-11-24 23:59:01,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 802. [2023-11-24 23:59:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 563 states have (on average 1.566607460035524) internal successors, (882), 586 states have internal predecessors, (882), 188 states have call successors, (188), 47 states have call predecessors, (188), 50 states have return successors, (203), 193 states have call predecessors, (203), 184 states have call successors, (203) [2023-11-24 23:59:01,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1273 transitions. [2023-11-24 23:59:01,295 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1273 transitions. Word has length 87 [2023-11-24 23:59:01,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:01,296 INFO L495 AbstractCegarLoop]: Abstraction has 802 states and 1273 transitions. [2023-11-24 23:59:01,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-24 23:59:01,296 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1273 transitions. [2023-11-24 23:59:01,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-24 23:59:01,300 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:01,300 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] [2023-11-24 23:59:01,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:59:01,301 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:59:01,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:01,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1413849226, now seen corresponding path program 1 times [2023-11-24 23:59:01,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:01,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404926510] [2023-11-24 23:59:01,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:01,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:01,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:59:01,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:01,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404926510] [2023-11-24 23:59:01,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404926510] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:01,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:01,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:59:01,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993998167] [2023-11-24 23:59:01,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:01,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:59:01,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:01,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:59:01,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:59:01,645 INFO L87 Difference]: Start difference. First operand 802 states and 1273 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-24 23:59:02,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:02,827 INFO L93 Difference]: Finished difference Result 1719 states and 2740 transitions. [2023-11-24 23:59:02,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:59:02,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 90 [2023-11-24 23:59:02,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:02,844 INFO L225 Difference]: With dead ends: 1719 [2023-11-24 23:59:02,845 INFO L226 Difference]: Without dead ends: 1199 [2023-11-24 23:59:02,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:59:02,855 INFO L413 NwaCegarLoop]: 1073 mSDtfsCounter, 1142 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:02,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1142 Valid, 1939 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 23:59:02,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2023-11-24 23:59:02,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1180. [2023-11-24 23:59:02,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 819 states have (on average 1.5189255189255189) internal successors, (1244), 853 states have internal predecessors, (1244), 278 states have call successors, (278), 76 states have call predecessors, (278), 82 states have return successors, (318), 288 states have call predecessors, (318), 273 states have call successors, (318) [2023-11-24 23:59:02,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1840 transitions. [2023-11-24 23:59:02,952 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1840 transitions. Word has length 90 [2023-11-24 23:59:02,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:02,953 INFO L495 AbstractCegarLoop]: Abstraction has 1180 states and 1840 transitions. [2023-11-24 23:59:02,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2023-11-24 23:59:02,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1840 transitions. [2023-11-24 23:59:02,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-24 23:59:02,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:02,958 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] [2023-11-24 23:59:02,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:59:02,958 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:59:02,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:02,959 INFO L85 PathProgramCache]: Analyzing trace with hash -2092123912, now seen corresponding path program 1 times [2023-11-24 23:59:02,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:02,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218606337] [2023-11-24 23:59:02,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:02,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:59:03,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:03,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218606337] [2023-11-24 23:59:03,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218606337] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:03,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:03,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:59:03,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448969534] [2023-11-24 23:59:03,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:03,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:59:03,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:03,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:59:03,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:59:03,301 INFO L87 Difference]: Start difference. First operand 1180 states and 1840 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-24 23:59:03,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:03,731 INFO L93 Difference]: Finished difference Result 2242 states and 3540 transitions. [2023-11-24 23:59:03,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:59:03,732 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 94 [2023-11-24 23:59:03,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:03,743 INFO L225 Difference]: With dead ends: 2242 [2023-11-24 23:59:03,743 INFO L226 Difference]: Without dead ends: 1328 [2023-11-24 23:59:03,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:59:03,753 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 229 mSDsluCounter, 2280 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 2918 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:03,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 2918 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:59:03,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2023-11-24 23:59:03,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1328. [2023-11-24 23:59:03,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 954 states have (on average 1.5188679245283019) internal successors, (1449), 993 states have internal predecessors, (1449), 282 states have call successors, (282), 80 states have call predecessors, (282), 91 states have return successors, (322), 292 states have call predecessors, (322), 277 states have call successors, (322) [2023-11-24 23:59:03,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 2053 transitions. [2023-11-24 23:59:03,839 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 2053 transitions. Word has length 94 [2023-11-24 23:59:03,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:03,839 INFO L495 AbstractCegarLoop]: Abstraction has 1328 states and 2053 transitions. [2023-11-24 23:59:03,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2023-11-24 23:59:03,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 2053 transitions. [2023-11-24 23:59:03,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-24 23:59:03,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:03,844 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] [2023-11-24 23:59:03,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:59:03,844 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:59:03,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:03,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1602261702, now seen corresponding path program 1 times [2023-11-24 23:59:03,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:03,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279883345] [2023-11-24 23:59:03,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:03,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:59:04,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:04,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279883345] [2023-11-24 23:59:04,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279883345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:04,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:04,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:59:04,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119046108] [2023-11-24 23:59:04,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:04,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:59:04,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:04,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:59:04,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:59:04,256 INFO L87 Difference]: Start difference. First operand 1328 states and 2053 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-24 23:59:04,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:04,996 INFO L93 Difference]: Finished difference Result 2280 states and 3542 transitions. [2023-11-24 23:59:04,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:59:04,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 96 [2023-11-24 23:59:04,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:05,011 INFO L225 Difference]: With dead ends: 2280 [2023-11-24 23:59:05,012 INFO L226 Difference]: Without dead ends: 1344 [2023-11-24 23:59:05,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:59:05,025 INFO L413 NwaCegarLoop]: 768 mSDtfsCounter, 519 mSDsluCounter, 1924 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 2692 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:05,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 2692 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:59:05,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2023-11-24 23:59:05,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1333. [2023-11-24 23:59:05,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 957 states have (on average 1.5172413793103448) internal successors, (1452), 997 states have internal predecessors, (1452), 283 states have call successors, (283), 81 states have call predecessors, (283), 92 states have return successors, (325), 292 states have call predecessors, (325), 278 states have call successors, (325) [2023-11-24 23:59:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 2060 transitions. [2023-11-24 23:59:05,120 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 2060 transitions. Word has length 96 [2023-11-24 23:59:05,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:05,121 INFO L495 AbstractCegarLoop]: Abstraction has 1333 states and 2060 transitions. [2023-11-24 23:59:05,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-24 23:59:05,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 2060 transitions. [2023-11-24 23:59:05,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-24 23:59:05,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:05,125 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] [2023-11-24 23:59:05,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:59:05,126 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:59:05,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:05,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1396080195, now seen corresponding path program 1 times [2023-11-24 23:59:05,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:05,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949727005] [2023-11-24 23:59:05,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:05,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 23:59:05,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:05,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949727005] [2023-11-24 23:59:05,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949727005] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:05,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684183621] [2023-11-24 23:59:05,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:05,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:05,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:05,407 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:05,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:59:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:05,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 1360 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:59:05,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:59:05,867 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:05,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684183621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:05,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:05,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-11-24 23:59:05,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510434875] [2023-11-24 23:59:05,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:05,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:59:05,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:05,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:59:05,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:59:05,871 INFO L87 Difference]: Start difference. First operand 1333 states and 2060 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-24 23:59:06,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:06,133 INFO L93 Difference]: Finished difference Result 2669 states and 4156 transitions. [2023-11-24 23:59:06,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:59:06,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 99 [2023-11-24 23:59:06,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:06,145 INFO L225 Difference]: With dead ends: 2669 [2023-11-24 23:59:06,145 INFO L226 Difference]: Without dead ends: 1351 [2023-11-24 23:59:06,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:59:06,158 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 85 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1689 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:06,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1689 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:59:06,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2023-11-24 23:59:06,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1351. [2023-11-24 23:59:06,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 972 states have (on average 1.5123456790123457) internal successors, (1470), 1012 states have internal predecessors, (1470), 283 states have call successors, (283), 84 states have call predecessors, (283), 95 states have return successors, (325), 292 states have call predecessors, (325), 278 states have call successors, (325) [2023-11-24 23:59:06,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 2078 transitions. [2023-11-24 23:59:06,255 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 2078 transitions. Word has length 99 [2023-11-24 23:59:06,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:06,256 INFO L495 AbstractCegarLoop]: Abstraction has 1351 states and 2078 transitions. [2023-11-24 23:59:06,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-24 23:59:06,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 2078 transitions. [2023-11-24 23:59:06,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-24 23:59:06,264 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:06,265 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] [2023-11-24 23:59:06,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 23:59:06,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-24 23:59:06,472 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:59:06,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:06,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1644605620, now seen corresponding path program 1 times [2023-11-24 23:59:06,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:06,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452746988] [2023-11-24 23:59:06,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:06,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:59:06,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:06,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452746988] [2023-11-24 23:59:06,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452746988] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:06,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849086726] [2023-11-24 23:59:06,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:06,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:06,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:06,803 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:06,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:59:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:07,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 1365 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:59:07,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 23:59:07,247 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:07,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849086726] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:07,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:07,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-24 23:59:07,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375269204] [2023-11-24 23:59:07,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:07,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:59:07,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:07,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:59:07,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:59:07,252 INFO L87 Difference]: Start difference. First operand 1351 states and 2078 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-24 23:59:07,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:07,519 INFO L93 Difference]: Finished difference Result 2696 states and 4171 transitions. [2023-11-24 23:59:07,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:59:07,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 101 [2023-11-24 23:59:07,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:07,532 INFO L225 Difference]: With dead ends: 2696 [2023-11-24 23:59:07,532 INFO L226 Difference]: Without dead ends: 1348 [2023-11-24 23:59:07,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:59:07,546 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 91 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:07,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1685 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:59:07,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2023-11-24 23:59:07,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1348. [2023-11-24 23:59:07,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 969 states have (on average 1.5046439628482973) internal successors, (1458), 1009 states have internal predecessors, (1458), 283 states have call successors, (283), 84 states have call predecessors, (283), 95 states have return successors, (325), 292 states have call predecessors, (325), 278 states have call successors, (325) [2023-11-24 23:59:07,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 2066 transitions. [2023-11-24 23:59:07,638 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 2066 transitions. Word has length 101 [2023-11-24 23:59:07,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:07,639 INFO L495 AbstractCegarLoop]: Abstraction has 1348 states and 2066 transitions. [2023-11-24 23:59:07,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-24 23:59:07,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 2066 transitions. [2023-11-24 23:59:07,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-24 23:59:07,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:07,644 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] [2023-11-24 23:59:07,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:07,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:07,851 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:59:07,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:07,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1743482541, now seen corresponding path program 1 times [2023-11-24 23:59:07,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:07,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657303268] [2023-11-24 23:59:07,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:07,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:59:08,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:08,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657303268] [2023-11-24 23:59:08,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657303268] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:08,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727912187] [2023-11-24 23:59:08,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:08,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:08,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:08,096 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:08,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:59:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:08,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:59:08,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:59:08,557 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:08,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727912187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:08,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:08,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-24 23:59:08,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468992463] [2023-11-24 23:59:08,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:08,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:59:08,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:08,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:59:08,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:59:08,560 INFO L87 Difference]: Start difference. First operand 1348 states and 2066 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:59:09,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:09,659 INFO L93 Difference]: Finished difference Result 3456 states and 5434 transitions. [2023-11-24 23:59:09,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:59:09,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 103 [2023-11-24 23:59:09,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:09,678 INFO L225 Difference]: With dead ends: 3456 [2023-11-24 23:59:09,678 INFO L226 Difference]: Without dead ends: 2123 [2023-11-24 23:59:09,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:59:09,691 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 612 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 1876 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:09,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 1876 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 23:59:09,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2023-11-24 23:59:09,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2090. [2023-11-24 23:59:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 1500 states have (on average 1.4826666666666666) internal successors, (2224), 1565 states have internal predecessors, (2224), 443 states have call successors, (443), 132 states have call predecessors, (443), 146 states have return successors, (557), 454 states have call predecessors, (557), 436 states have call successors, (557) [2023-11-24 23:59:09,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 3224 transitions. [2023-11-24 23:59:09,827 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 3224 transitions. Word has length 103 [2023-11-24 23:59:09,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:09,828 INFO L495 AbstractCegarLoop]: Abstraction has 2090 states and 3224 transitions. [2023-11-24 23:59:09,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:59:09,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 3224 transitions. [2023-11-24 23:59:09,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-24 23:59:09,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:09,833 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] [2023-11-24 23:59:09,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:10,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:10,041 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:59:10,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:10,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1096321457, now seen corresponding path program 1 times [2023-11-24 23:59:10,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:10,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843065897] [2023-11-24 23:59:10,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:10,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:59:10,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:10,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843065897] [2023-11-24 23:59:10,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843065897] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:10,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209898859] [2023-11-24 23:59:10,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:10,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:10,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:10,405 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:10,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:59:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:10,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 23:59:10,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:59:10,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:10,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209898859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:10,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:10,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-11-24 23:59:10,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876636888] [2023-11-24 23:59:10,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:10,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:59:10,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:10,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:59:10,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-24 23:59:10,963 INFO L87 Difference]: Start difference. First operand 2090 states and 3224 transitions. Second operand has 6 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:59:11,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:11,990 INFO L93 Difference]: Finished difference Result 4598 states and 7148 transitions. [2023-11-24 23:59:11,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:59:11,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 103 [2023-11-24 23:59:11,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:12,013 INFO L225 Difference]: With dead ends: 4598 [2023-11-24 23:59:12,013 INFO L226 Difference]: Without dead ends: 2523 [2023-11-24 23:59:12,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:59:12,031 INFO L413 NwaCegarLoop]: 814 mSDtfsCounter, 683 mSDsluCounter, 2329 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 3143 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:12,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 3143 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:59:12,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2523 states. [2023-11-24 23:59:12,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2523 to 2511. [2023-11-24 23:59:12,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2511 states, 1822 states have (on average 1.4714599341383094) internal successors, (2681), 1888 states have internal predecessors, (2681), 499 states have call successors, (499), 178 states have call predecessors, (499), 189 states have return successors, (738), 506 states have call predecessors, (738), 488 states have call successors, (738) [2023-11-24 23:59:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 3918 transitions. [2023-11-24 23:59:12,250 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 3918 transitions. Word has length 103 [2023-11-24 23:59:12,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:12,251 INFO L495 AbstractCegarLoop]: Abstraction has 2511 states and 3918 transitions. [2023-11-24 23:59:12,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:59:12,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 3918 transitions. [2023-11-24 23:59:12,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-24 23:59:12,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:12,259 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] [2023-11-24 23:59:12,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:12,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-24 23:59:12,466 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:59:12,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:12,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1966868695, now seen corresponding path program 1 times [2023-11-24 23:59:12,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:12,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974904596] [2023-11-24 23:59:12,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:12,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-24 23:59:12,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:12,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974904596] [2023-11-24 23:59:12,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974904596] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:12,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328283672] [2023-11-24 23:59:12,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:12,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:12,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:12,696 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:12,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:59:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:13,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 1372 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:59:13,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 23:59:13,094 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:13,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328283672] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:13,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:13,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-24 23:59:13,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802076564] [2023-11-24 23:59:13,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:13,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:59:13,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:13,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:59:13,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:59:13,100 INFO L87 Difference]: Start difference. First operand 2511 states and 3918 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-24 23:59:13,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:13,442 INFO L93 Difference]: Finished difference Result 5050 states and 7976 transitions. [2023-11-24 23:59:13,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:59:13,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 103 [2023-11-24 23:59:13,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:13,465 INFO L225 Difference]: With dead ends: 5050 [2023-11-24 23:59:13,465 INFO L226 Difference]: Without dead ends: 2562 [2023-11-24 23:59:13,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:59:13,494 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 1 mSDsluCounter, 1788 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2389 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 [2023-11-24 23:59:13,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2389 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:59:13,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2023-11-24 23:59:13,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 2531. [2023-11-24 23:59:13,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 1837 states have (on average 1.4676102340772998) internal successors, (2696), 1903 states have internal predecessors, (2696), 499 states have call successors, (499), 178 states have call predecessors, (499), 194 states have return successors, (743), 511 states have call predecessors, (743), 488 states have call successors, (743) [2023-11-24 23:59:13,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 3938 transitions. [2023-11-24 23:59:13,731 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 3938 transitions. Word has length 103 [2023-11-24 23:59:13,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:13,733 INFO L495 AbstractCegarLoop]: Abstraction has 2531 states and 3938 transitions. [2023-11-24 23:59:13,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-24 23:59:13,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 3938 transitions. [2023-11-24 23:59:13,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-24 23:59:13,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:13,740 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] [2023-11-24 23:59:13,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:13,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 23:59:13,949 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:59:13,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:13,949 INFO L85 PathProgramCache]: Analyzing trace with hash -2018422152, now seen corresponding path program 1 times [2023-11-24 23:59:13,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:13,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658672087] [2023-11-24 23:59:13,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:13,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-24 23:59:14,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:14,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658672087] [2023-11-24 23:59:14,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658672087] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:14,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623946596] [2023-11-24 23:59:14,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:14,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:14,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:14,193 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:14,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 23:59:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:14,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:59:14,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 23:59:14,588 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:59:14,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623946596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:14,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:59:14,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-24 23:59:14,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045854552] [2023-11-24 23:59:14,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:14,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:59:14,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:14,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:59:14,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:59:14,591 INFO L87 Difference]: Start difference. First operand 2531 states and 3938 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-24 23:59:15,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:15,035 INFO L93 Difference]: Finished difference Result 5169 states and 8189 transitions. [2023-11-24 23:59:15,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:59:15,038 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 105 [2023-11-24 23:59:15,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:15,073 INFO L225 Difference]: With dead ends: 5169 [2023-11-24 23:59:15,073 INFO L226 Difference]: Without dead ends: 2662 [2023-11-24 23:59:15,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:59:15,134 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 19 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:15,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1637 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:59:15,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2023-11-24 23:59:15,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 2632. [2023-11-24 23:59:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 1938 states have (on average 1.476264189886481) internal successors, (2861), 2004 states have internal predecessors, (2861), 499 states have call successors, (499), 178 states have call predecessors, (499), 194 states have return successors, (743), 511 states have call predecessors, (743), 488 states have call successors, (743) [2023-11-24 23:59:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 4103 transitions. [2023-11-24 23:59:15,318 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 4103 transitions. Word has length 105 [2023-11-24 23:59:15,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:15,320 INFO L495 AbstractCegarLoop]: Abstraction has 2632 states and 4103 transitions. [2023-11-24 23:59:15,320 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-24 23:59:15,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 4103 transitions. [2023-11-24 23:59:15,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-24 23:59:15,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:15,326 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] [2023-11-24 23:59:15,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 23:59:15,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 23:59:15,535 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:59:15,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:15,536 INFO L85 PathProgramCache]: Analyzing trace with hash 720517198, now seen corresponding path program 1 times [2023-11-24 23:59:15,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:15,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396825378] [2023-11-24 23:59:15,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:15,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 23:59:16,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:16,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396825378] [2023-11-24 23:59:16,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396825378] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:59:16,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:59:16,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-24 23:59:16,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609112427] [2023-11-24 23:59:16,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:59:16,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 23:59:16,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:59:16,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 23:59:16,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:59:16,243 INFO L87 Difference]: Start difference. First operand 2632 states and 4103 transitions. Second operand has 12 states, 10 states have (on average 6.9) internal successors, (69), 11 states have internal predecessors, (69), 6 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-24 23:59:27,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:59:27,392 INFO L93 Difference]: Finished difference Result 11938 states and 20938 transitions. [2023-11-24 23:59:27,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-24 23:59:27,393 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 6.9) internal successors, (69), 11 states have internal predecessors, (69), 6 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 107 [2023-11-24 23:59:27,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:59:27,483 INFO L225 Difference]: With dead ends: 11938 [2023-11-24 23:59:27,483 INFO L226 Difference]: Without dead ends: 9305 [2023-11-24 23:59:27,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=358, Invalid=1712, Unknown=0, NotChecked=0, Total=2070 [2023-11-24 23:59:27,522 INFO L413 NwaCegarLoop]: 1248 mSDtfsCounter, 4423 mSDsluCounter, 6104 mSDsCounter, 0 mSdLazyCounter, 10643 mSolverCounterSat, 1606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4555 SdHoareTripleChecker+Valid, 7352 SdHoareTripleChecker+Invalid, 12249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1606 IncrementalHoareTripleChecker+Valid, 10643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:59:27,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4555 Valid, 7352 Invalid, 12249 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1606 Valid, 10643 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2023-11-24 23:59:27,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9305 states. [2023-11-24 23:59:28,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9305 to 7998. [2023-11-24 23:59:28,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7998 states, 5902 states have (on average 1.475770925110132) internal successors, (8710), 6096 states have internal predecessors, (8710), 1500 states have call successors, (1500), 528 states have call predecessors, (1500), 595 states have return successors, (3329), 1553 states have call predecessors, (3329), 1469 states have call successors, (3329) [2023-11-24 23:59:28,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7998 states to 7998 states and 13539 transitions. [2023-11-24 23:59:28,439 INFO L78 Accepts]: Start accepts. Automaton has 7998 states and 13539 transitions. Word has length 107 [2023-11-24 23:59:28,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:59:28,440 INFO L495 AbstractCegarLoop]: Abstraction has 7998 states and 13539 transitions. [2023-11-24 23:59:28,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 6.9) internal successors, (69), 11 states have internal predecessors, (69), 6 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-24 23:59:28,440 INFO L276 IsEmpty]: Start isEmpty. Operand 7998 states and 13539 transitions. [2023-11-24 23:59:28,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-24 23:59:28,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:59:28,447 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] [2023-11-24 23:59:28,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 23:59:28,447 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:59:28,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:59:28,448 INFO L85 PathProgramCache]: Analyzing trace with hash 582226887, now seen corresponding path program 1 times [2023-11-24 23:59:28,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:59:28,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997837779] [2023-11-24 23:59:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:28,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:59:28,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-24 23:59:28,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:59:28,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997837779] [2023-11-24 23:59:28,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997837779] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:59:28,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019869492] [2023-11-24 23:59:28,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:59:28,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:59:28,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:59:28,758 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:59:28,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b70cc9-593b-4691-8075-81c47fbae90a/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 23:59:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:59:29,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:59:29,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:59:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 23:59:29,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:59:29,483 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-24 23:59:29,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019869492] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:59:29,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [303308935] [2023-11-24 23:59:29,518 INFO L159 IcfgInterpreter]: Started Sifa with 97 locations of interest [2023-11-24 23:59:29,518 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:59:29,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:59:29,528 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:59:29,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs