./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/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_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/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_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/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 8e809cb7921b0f8738511433928ba20d09f78a0d0fe23412d97e6052fa9e13ec --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:15:10,320 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:15:10,444 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:15:10,449 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:15:10,450 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:15:10,477 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:15:10,477 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:15:10,478 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:15:10,479 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:15:10,480 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:15:10,480 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:15:10,481 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:15:10,482 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:15:10,482 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:15:10,483 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:15:10,483 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:15:10,484 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:15:10,485 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:15:10,485 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:15:10,486 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:15:10,486 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:15:10,487 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:15:10,488 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:15:10,488 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:15:10,489 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:15:10,489 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:15:10,490 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:15:10,490 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:15:10,491 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:15:10,491 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:15:10,492 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:15:10,492 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:15:10,492 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:15:10,493 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:15:10,493 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:15:10,493 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:15:10,494 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:15:10,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:15:10,494 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:15:10,495 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:15:10,495 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:15:10,495 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:15:10,496 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:15:10,496 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:15:10,496 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:15:10,497 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:15:10,497 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:15:10,497 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_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e809cb7921b0f8738511433928ba20d09f78a0d0fe23412d97e6052fa9e13ec [2023-11-24 23:15:10,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:15:10,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:15:10,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:15:10,774 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:15:10,774 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:15:10,776 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c [2023-11-24 23:15:13,920 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:15:14,265 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:15:14,265 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c [2023-11-24 23:15:14,294 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/bin/utaipan-verify-SwPr7d2a91/data/0e193252d/88916832810f46c3982326162bb84faa/FLAGf36bca6ce [2023-11-24 23:15:14,308 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/bin/utaipan-verify-SwPr7d2a91/data/0e193252d/88916832810f46c3982326162bb84faa [2023-11-24 23:15:14,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:15:14,313 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:15:14,315 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:15:14,315 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:15:14,321 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:15:14,322 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:15:14" (1/1) ... [2023-11-24 23:15:14,323 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16dde453 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:14, skipping insertion in model container [2023-11-24 23:15:14,324 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:15:14" (1/1) ... [2023-11-24 23:15:14,425 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:15:14,636 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_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c[1545,1558] [2023-11-24 23:15:15,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:15:15,125 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:15:15,137 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [48] [2023-11-24 23:15:15,139 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [57] [2023-11-24 23:15:15,139 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [421] [2023-11-24 23:15:15,140 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [541] [2023-11-24 23:15:15,140 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [907] [2023-11-24 23:15:15,141 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [2442] [2023-11-24 23:15:15,141 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [2533] [2023-11-24 23:15:15,142 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [2714] [2023-11-24 23:15:15,142 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [3375] [2023-11-24 23:15:15,143 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3387] [2023-11-24 23:15:15,158 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_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/sv-benchmarks/c/product-lines/elevator_spec2_product11.cil.c[1545,1558] [2023-11-24 23:15:15,338 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:15:15,375 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:15:15,376 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:15 WrapperNode [2023-11-24 23:15:15,376 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:15:15,378 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:15:15,378 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:15:15,378 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:15:15,387 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:15" (1/1) ... [2023-11-24 23:15:15,418 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:15" (1/1) ... [2023-11-24 23:15:15,482 INFO L138 Inliner]: procedures = 93, calls = 338, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 1128 [2023-11-24 23:15:15,483 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:15:15,484 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:15:15,484 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:15:15,484 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:15:15,494 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:15" (1/1) ... [2023-11-24 23:15:15,495 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:15" (1/1) ... [2023-11-24 23:15:15,501 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:15" (1/1) ... [2023-11-24 23:15:15,502 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:15" (1/1) ... [2023-11-24 23:15:15,527 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:15" (1/1) ... [2023-11-24 23:15:15,544 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:15" (1/1) ... [2023-11-24 23:15:15,552 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:15" (1/1) ... [2023-11-24 23:15:15,559 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:15" (1/1) ... [2023-11-24 23:15:15,570 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:15:15,571 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:15:15,571 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:15:15,571 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:15:15,572 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:15" (1/1) ... [2023-11-24 23:15:15,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:15:15,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:15:15,608 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:15:15,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:15:15,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:15:15,676 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-11-24 23:15:15,677 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-11-24 23:15:15,677 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-11-24 23:15:15,677 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-11-24 23:15:15,677 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-11-24 23:15:15,677 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-11-24 23:15:15,678 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-11-24 23:15:15,678 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-11-24 23:15:15,678 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-11-24 23:15:15,678 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-11-24 23:15:15,679 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-11-24 23:15:15,679 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-11-24 23:15:15,679 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-11-24 23:15:15,679 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-11-24 23:15:15,679 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-11-24 23:15:15,680 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-11-24 23:15:15,680 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-11-24 23:15:15,680 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-11-24 23:15:15,680 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-11-24 23:15:15,680 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-11-24 23:15:15,681 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-11-24 23:15:15,681 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-11-24 23:15:15,681 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-11-24 23:15:15,681 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-11-24 23:15:15,681 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-11-24 23:15:15,681 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-11-24 23:15:15,682 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-11-24 23:15:15,682 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-11-24 23:15:15,682 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-11-24 23:15:15,682 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-11-24 23:15:15,682 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-11-24 23:15:15,683 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-11-24 23:15:15,683 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-11-24 23:15:15,683 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-11-24 23:15:15,683 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-11-24 23:15:15,683 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-11-24 23:15:15,683 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-11-24 23:15:15,684 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-11-24 23:15:15,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:15:15,684 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-11-24 23:15:15,684 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-11-24 23:15:15,684 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-11-24 23:15:15,684 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-11-24 23:15:15,685 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-11-24 23:15:15,685 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-11-24 23:15:15,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:15:15,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:15:15,685 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-11-24 23:15:15,685 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-11-24 23:15:15,854 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:15:15,857 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:15:17,232 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:15:18,227 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:15:18,228 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 23:15:18,230 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:15:18 BoogieIcfgContainer [2023-11-24 23:15:18,230 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:15:18,234 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:15:18,234 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:15:18,238 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:15:18,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:15:14" (1/3) ... [2023-11-24 23:15:18,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37aeb1ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:15:18, skipping insertion in model container [2023-11-24 23:15:18,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:15" (2/3) ... [2023-11-24 23:15:18,242 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37aeb1ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:15:18, skipping insertion in model container [2023-11-24 23:15:18,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:15:18" (3/3) ... [2023-11-24 23:15:18,244 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product11.cil.c [2023-11-24 23:15:18,266 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:15:18,266 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:15:18,357 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:15:18,385 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;@1cc03341, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:15:18,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:15:18,394 INFO L276 IsEmpty]: Start isEmpty. Operand has 368 states, 249 states have (on average 1.6024096385542168) internal successors, (399), 270 states have internal predecessors, (399), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 88 states have call predecessors, (94), 94 states have call successors, (94) [2023-11-24 23:15:18,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-24 23:15:18,436 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:18,438 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:15:18,440 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:18,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:18,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1732905127, now seen corresponding path program 1 times [2023-11-24 23:15:18,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:18,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15353560] [2023-11-24 23:15:18,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:18,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:19,039 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 23:15:19,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:19,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15353560] [2023-11-24 23:15:19,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15353560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:15:19,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:15:19,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:15:19,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403738775] [2023-11-24 23:15:19,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:15:19,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 23:15:19,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:19,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 23:15:19,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:15:19,109 INFO L87 Difference]: Start difference. First operand has 368 states, 249 states have (on average 1.6024096385542168) internal successors, (399), 270 states have internal predecessors, (399), 94 states have call successors, (94), 23 states have call predecessors, (94), 23 states have return successors, (94), 88 states have call predecessors, (94), 94 states have call successors, (94) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-24 23:15:19,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:19,334 INFO L93 Difference]: Finished difference Result 386 states and 614 transitions. [2023-11-24 23:15:19,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 23:15:19,339 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 77 [2023-11-24 23:15:19,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:19,368 INFO L225 Difference]: With dead ends: 386 [2023-11-24 23:15:19,368 INFO L226 Difference]: Without dead ends: 364 [2023-11-24 23:15:19,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:15:19,377 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:15:19,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 547 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:15:19,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-11-24 23:15:19,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2023-11-24 23:15:19,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 247 states have (on average 1.591093117408907) internal successors, (393), 266 states have internal predecessors, (393), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2023-11-24 23:15:19,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 576 transitions. [2023-11-24 23:15:19,481 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 576 transitions. Word has length 77 [2023-11-24 23:15:19,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:19,483 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 576 transitions. [2023-11-24 23:15:19,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-24 23:15:19,484 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 576 transitions. [2023-11-24 23:15:19,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-24 23:15:19,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:19,492 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:15:19,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:15:19,494 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:19,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:19,494 INFO L85 PathProgramCache]: Analyzing trace with hash 393129984, now seen corresponding path program 1 times [2023-11-24 23:15:19,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:19,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631406673] [2023-11-24 23:15:19,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:19,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:20,255 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 23:15:20,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:20,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631406673] [2023-11-24 23:15:20,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631406673] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:15:20,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:15:20,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 23:15:20,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374597759] [2023-11-24 23:15:20,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:15:20,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:15:20,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:20,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:15:20,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:15:20,267 INFO L87 Difference]: Start difference. First operand 364 states and 576 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-24 23:15:22,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:22,875 INFO L93 Difference]: Finished difference Result 1123 states and 1807 transitions. [2023-11-24 23:15:22,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 23:15:22,876 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 78 [2023-11-24 23:15:22,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:22,886 INFO L225 Difference]: With dead ends: 1123 [2023-11-24 23:15:22,886 INFO L226 Difference]: Without dead ends: 775 [2023-11-24 23:15:22,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:15:22,900 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 1135 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 2145 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 2561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 2145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:15:22,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1210 Valid, 1603 Invalid, 2561 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [416 Valid, 2145 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-24 23:15:22,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2023-11-24 23:15:23,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 726. [2023-11-24 23:15:23,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 501 states have (on average 1.6027944111776447) internal successors, (803), 534 states have internal predecessors, (803), 182 states have call successors, (182), 42 states have call predecessors, (182), 42 states have return successors, (183), 174 states have call predecessors, (183), 177 states have call successors, (183) [2023-11-24 23:15:23,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1168 transitions. [2023-11-24 23:15:23,025 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1168 transitions. Word has length 78 [2023-11-24 23:15:23,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:23,027 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 1168 transitions. [2023-11-24 23:15:23,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-24 23:15:23,028 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1168 transitions. [2023-11-24 23:15:23,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-24 23:15:23,033 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:23,033 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:15:23,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:15:23,034 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:23,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:23,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1561276922, now seen corresponding path program 1 times [2023-11-24 23:15:23,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:23,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054005592] [2023-11-24 23:15:23,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:23,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:23,404 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 23:15:23,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:23,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054005592] [2023-11-24 23:15:23,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054005592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:15:23,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:15:23,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:15:23,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670401493] [2023-11-24 23:15:23,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:15:23,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:15:23,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:23,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:15:23,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:15:23,408 INFO L87 Difference]: Start difference. First operand 726 states and 1168 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-24 23:15:23,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:23,935 INFO L93 Difference]: Finished difference Result 797 states and 1280 transitions. [2023-11-24 23:15:23,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:15:23,936 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2023-11-24 23:15:23,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:23,944 INFO L225 Difference]: With dead ends: 797 [2023-11-24 23:15:23,944 INFO L226 Difference]: Without dead ends: 782 [2023-11-24 23:15:23,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:15:23,947 INFO L413 NwaCegarLoop]: 536 mSDtfsCounter, 669 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 1436 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:15:23,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 1436 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:15:23,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2023-11-24 23:15:24,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 730. [2023-11-24 23:15:24,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 505 states have (on average 1.598019801980198) internal successors, (807), 538 states have internal predecessors, (807), 182 states have call successors, (182), 42 states have call predecessors, (182), 42 states have return successors, (183), 174 states have call predecessors, (183), 177 states have call successors, (183) [2023-11-24 23:15:24,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1172 transitions. [2023-11-24 23:15:24,042 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1172 transitions. Word has length 82 [2023-11-24 23:15:24,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:24,043 INFO L495 AbstractCegarLoop]: Abstraction has 730 states and 1172 transitions. [2023-11-24 23:15:24,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-24 23:15:24,043 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1172 transitions. [2023-11-24 23:15:24,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-24 23:15:24,047 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:24,047 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:15:24,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:15:24,048 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:24,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:24,048 INFO L85 PathProgramCache]: Analyzing trace with hash -305689301, now seen corresponding path program 1 times [2023-11-24 23:15:24,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:24,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067686491] [2023-11-24 23:15:24,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:24,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:24,329 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 23:15:24,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:24,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067686491] [2023-11-24 23:15:24,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067686491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:15:24,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:15:24,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:15:24,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85349839] [2023-11-24 23:15:24,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:15:24,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:15:24,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:24,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:15:24,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:15:24,333 INFO L87 Difference]: Start difference. First operand 730 states and 1172 transitions. Second operand has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-24 23:15:24,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:24,520 INFO L93 Difference]: Finished difference Result 749 states and 1196 transitions. [2023-11-24 23:15:24,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:15:24,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) Word has length 87 [2023-11-24 23:15:24,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:24,530 INFO L225 Difference]: With dead ends: 749 [2023-11-24 23:15:24,530 INFO L226 Difference]: Without dead ends: 734 [2023-11-24 23:15:24,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 23:15:24,538 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 30 mSDsluCounter, 1602 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2148 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:15:24,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2148 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:15:24,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2023-11-24 23:15:24,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 730. [2023-11-24 23:15:24,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 505 states have (on average 1.5940594059405941) internal successors, (805), 538 states have internal predecessors, (805), 182 states have call successors, (182), 42 states have call predecessors, (182), 42 states have return successors, (183), 174 states have call predecessors, (183), 177 states have call successors, (183) [2023-11-24 23:15:24,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1170 transitions. [2023-11-24 23:15:24,612 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1170 transitions. Word has length 87 [2023-11-24 23:15:24,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:24,614 INFO L495 AbstractCegarLoop]: Abstraction has 730 states and 1170 transitions. [2023-11-24 23:15:24,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-24 23:15:24,615 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1170 transitions. [2023-11-24 23:15:24,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-24 23:15:24,618 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:24,619 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:15:24,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:15:24,619 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:24,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:24,620 INFO L85 PathProgramCache]: Analyzing trace with hash 753814275, now seen corresponding path program 1 times [2023-11-24 23:15:24,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:24,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668929620] [2023-11-24 23:15:24,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:24,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 23:15:24,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:24,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668929620] [2023-11-24 23:15:24,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668929620] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:15:24,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:15:24,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:15:24,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581535962] [2023-11-24 23:15:24,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:15:24,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:15:24,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:24,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:15:24,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:15:24,911 INFO L87 Difference]: Start difference. First operand 730 states and 1170 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:15:26,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:26,622 INFO L93 Difference]: Finished difference Result 2351 states and 3833 transitions. [2023-11-24 23:15:26,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:15:26,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2023-11-24 23:15:26,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:26,641 INFO L225 Difference]: With dead ends: 2351 [2023-11-24 23:15:26,641 INFO L226 Difference]: Without dead ends: 1637 [2023-11-24 23:15:26,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 23:15:26,650 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 1146 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:15:26,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1216 Valid, 676 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-24 23:15:26,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2023-11-24 23:15:26,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1471. [2023-11-24 23:15:26,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1039 states have (on average 1.604427333974976) internal successors, (1667), 1102 states have internal predecessors, (1667), 351 states have call successors, (351), 75 states have call predecessors, (351), 80 states have return successors, (369), 329 states have call predecessors, (369), 346 states have call successors, (369) [2023-11-24 23:15:26,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 2387 transitions. [2023-11-24 23:15:26,803 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 2387 transitions. Word has length 94 [2023-11-24 23:15:26,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:26,803 INFO L495 AbstractCegarLoop]: Abstraction has 1471 states and 2387 transitions. [2023-11-24 23:15:26,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:15:26,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 2387 transitions. [2023-11-24 23:15:26,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-24 23:15:26,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:26,808 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:15:26,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:15:26,808 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:26,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:26,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1893271340, now seen corresponding path program 1 times [2023-11-24 23:15:26,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:26,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727745499] [2023-11-24 23:15:26,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:26,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 23:15:27,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:27,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727745499] [2023-11-24 23:15:27,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727745499] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:15:27,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:15:27,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:15:27,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280859287] [2023-11-24 23:15:27,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:15:27,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:15:27,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:27,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:15:27,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:15:27,128 INFO L87 Difference]: Start difference. First operand 1471 states and 2387 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:15:28,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:28,877 INFO L93 Difference]: Finished difference Result 4506 states and 7427 transitions. [2023-11-24 23:15:28,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:15:28,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 95 [2023-11-24 23:15:28,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:28,914 INFO L225 Difference]: With dead ends: 4506 [2023-11-24 23:15:28,915 INFO L226 Difference]: Without dead ends: 3054 [2023-11-24 23:15:28,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 23:15:28,925 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 1137 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:15:28,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1206 Valid, 684 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-24 23:15:28,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3054 states. [2023-11-24 23:15:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3054 to 2841. [2023-11-24 23:15:29,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2841 states, 2029 states have (on average 1.6116313454903894) internal successors, (3270), 2159 states have internal predecessors, (3270), 652 states have call successors, (652), 141 states have call predecessors, (652), 159 states have return successors, (730), 602 states have call predecessors, (730), 647 states have call successors, (730) [2023-11-24 23:15:29,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2841 states to 2841 states and 4652 transitions. [2023-11-24 23:15:29,234 INFO L78 Accepts]: Start accepts. Automaton has 2841 states and 4652 transitions. Word has length 95 [2023-11-24 23:15:29,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:29,236 INFO L495 AbstractCegarLoop]: Abstraction has 2841 states and 4652 transitions. [2023-11-24 23:15:29,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:15:29,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2841 states and 4652 transitions. [2023-11-24 23:15:29,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-24 23:15:29,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:29,240 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:15:29,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:15:29,240 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:29,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:29,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1438261403, now seen corresponding path program 1 times [2023-11-24 23:15:29,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:29,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206187301] [2023-11-24 23:15:29,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:29,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 23:15:29,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:29,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206187301] [2023-11-24 23:15:29,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206187301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:15:29,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:15:29,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:15:29,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083644054] [2023-11-24 23:15:29,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:15:29,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:15:29,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:29,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:15:29,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:15:29,514 INFO L87 Difference]: Start difference. First operand 2841 states and 4652 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:15:31,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:31,468 INFO L93 Difference]: Finished difference Result 8658 states and 14491 transitions. [2023-11-24 23:15:31,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:15:31,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 96 [2023-11-24 23:15:31,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:31,528 INFO L225 Difference]: With dead ends: 8658 [2023-11-24 23:15:31,528 INFO L226 Difference]: Without dead ends: 5842 [2023-11-24 23:15:31,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 23:15:31,601 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 1124 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1192 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:15:31,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1192 Valid, 697 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-24 23:15:31,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5842 states. [2023-11-24 23:15:32,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5842 to 5526. [2023-11-24 23:15:32,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5526 states, 3964 states have (on average 1.612008072653885) internal successors, (6390), 4234 states have internal predecessors, (6390), 1238 states have call successors, (1238), 273 states have call predecessors, (1238), 323 states have return successors, (1528), 1132 states have call predecessors, (1528), 1233 states have call successors, (1528) [2023-11-24 23:15:32,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5526 states to 5526 states and 9156 transitions. [2023-11-24 23:15:32,199 INFO L78 Accepts]: Start accepts. Automaton has 5526 states and 9156 transitions. Word has length 96 [2023-11-24 23:15:32,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:32,200 INFO L495 AbstractCegarLoop]: Abstraction has 5526 states and 9156 transitions. [2023-11-24 23:15:32,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:15:32,200 INFO L276 IsEmpty]: Start isEmpty. Operand 5526 states and 9156 transitions. [2023-11-24 23:15:32,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-24 23:15:32,205 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:32,205 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:15:32,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:15:32,206 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:32,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:32,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1636557426, now seen corresponding path program 1 times [2023-11-24 23:15:32,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:32,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030968476] [2023-11-24 23:15:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:32,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 23:15:32,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:32,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030968476] [2023-11-24 23:15:32,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030968476] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:15:32,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:15:32,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:15:32,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333829318] [2023-11-24 23:15:32,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:15:32,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:15:32,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:32,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:15:32,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:15:32,458 INFO L87 Difference]: Start difference. First operand 5526 states and 9156 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:15:34,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:34,963 INFO L93 Difference]: Finished difference Result 16815 states and 28906 transitions. [2023-11-24 23:15:34,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:15:34,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 97 [2023-11-24 23:15:34,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:35,076 INFO L225 Difference]: With dead ends: 16815 [2023-11-24 23:15:35,077 INFO L226 Difference]: Without dead ends: 11326 [2023-11-24 23:15:35,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 23:15:35,112 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 1111 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 355 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:15:35,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1178 Valid, 707 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [355 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-24 23:15:35,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11326 states. [2023-11-24 23:15:36,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11326 to 10795. [2023-11-24 23:15:36,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10795 states, 7751 states have (on average 1.608824667784802) internal successors, (12470), 8313 states have internal predecessors, (12470), 2380 states have call successors, (2380), 537 states have call predecessors, (2380), 663 states have return successors, (3422), 2162 states have call predecessors, (3422), 2375 states have call successors, (3422) [2023-11-24 23:15:36,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10795 states to 10795 states and 18272 transitions. [2023-11-24 23:15:36,475 INFO L78 Accepts]: Start accepts. Automaton has 10795 states and 18272 transitions. Word has length 97 [2023-11-24 23:15:36,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:36,475 INFO L495 AbstractCegarLoop]: Abstraction has 10795 states and 18272 transitions. [2023-11-24 23:15:36,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:15:36,477 INFO L276 IsEmpty]: Start isEmpty. Operand 10795 states and 18272 transitions. [2023-11-24 23:15:36,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-24 23:15:36,483 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:36,483 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:15:36,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 23:15:36,483 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:36,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:36,484 INFO L85 PathProgramCache]: Analyzing trace with hash 806204359, now seen corresponding path program 1 times [2023-11-24 23:15:36,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:36,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90400273] [2023-11-24 23:15:36,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:36,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 23:15:36,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:36,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90400273] [2023-11-24 23:15:36,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90400273] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:15:36,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:15:36,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:15:36,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867882150] [2023-11-24 23:15:36,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:15:36,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:15:36,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:36,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:15:36,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:15:36,750 INFO L87 Difference]: Start difference. First operand 10795 states and 18272 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:15:40,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:40,078 INFO L93 Difference]: Finished difference Result 32920 states and 59442 transitions. [2023-11-24 23:15:40,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:15:40,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 98 [2023-11-24 23:15:40,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:40,232 INFO L225 Difference]: With dead ends: 32920 [2023-11-24 23:15:40,232 INFO L226 Difference]: Without dead ends: 22176 [2023-11-24 23:15:40,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 23:15:40,299 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 1103 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1169 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:15:40,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1169 Valid, 722 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-24 23:15:40,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22176 states. [2023-11-24 23:15:42,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22176 to 21104. [2023-11-24 23:15:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21104 states, 15181 states have (on average 1.607601607272248) internal successors, (24405), 16305 states have internal predecessors, (24405), 4604 states have call successors, (4604), 1063 states have call predecessors, (4604), 1318 states have return successors, (8041), 4161 states have call predecessors, (8041), 4599 states have call successors, (8041) [2023-11-24 23:15:43,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21104 states to 21104 states and 37050 transitions. [2023-11-24 23:15:43,131 INFO L78 Accepts]: Start accepts. Automaton has 21104 states and 37050 transitions. Word has length 98 [2023-11-24 23:15:43,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:43,132 INFO L495 AbstractCegarLoop]: Abstraction has 21104 states and 37050 transitions. [2023-11-24 23:15:43,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-11-24 23:15:43,132 INFO L276 IsEmpty]: Start isEmpty. Operand 21104 states and 37050 transitions. [2023-11-24 23:15:43,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-24 23:15:43,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:43,145 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:15:43,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 23:15:43,145 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:43,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:43,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1296509671, now seen corresponding path program 1 times [2023-11-24 23:15:43,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:43,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996243078] [2023-11-24 23:15:43,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:43,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:43,552 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-24 23:15:43,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:43,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996243078] [2023-11-24 23:15:43,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996243078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:15:43,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:15:43,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:15:43,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408488225] [2023-11-24 23:15:43,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:15:43,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:15:43,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:43,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:15:43,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:15:43,555 INFO L87 Difference]: Start difference. First operand 21104 states and 37050 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-24 23:15:45,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:45,546 INFO L93 Difference]: Finished difference Result 45467 states and 83079 transitions. [2023-11-24 23:15:45,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:15:45,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 142 [2023-11-24 23:15:45,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:45,715 INFO L225 Difference]: With dead ends: 45467 [2023-11-24 23:15:45,716 INFO L226 Difference]: Without dead ends: 24380 [2023-11-24 23:15:45,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 23:15:45,800 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 113 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:15:45,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 1726 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:15:45,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24380 states. [2023-11-24 23:15:48,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24380 to 21344. [2023-11-24 23:15:48,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21344 states, 15404 states have (on average 1.6018566606076343) internal successors, (24675), 16512 states have internal predecessors, (24675), 4621 states have call successors, (4621), 1063 states have call predecessors, (4621), 1318 states have return successors, (8058), 4178 states have call predecessors, (8058), 4616 states have call successors, (8058) [2023-11-24 23:15:48,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21344 states to 21344 states and 37354 transitions. [2023-11-24 23:15:48,407 INFO L78 Accepts]: Start accepts. Automaton has 21344 states and 37354 transitions. Word has length 142 [2023-11-24 23:15:48,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:48,407 INFO L495 AbstractCegarLoop]: Abstraction has 21344 states and 37354 transitions. [2023-11-24 23:15:48,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-24 23:15:48,408 INFO L276 IsEmpty]: Start isEmpty. Operand 21344 states and 37354 transitions. [2023-11-24 23:15:48,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-24 23:15:48,418 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:48,419 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:15:48,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 23:15:48,419 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:48,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:48,420 INFO L85 PathProgramCache]: Analyzing trace with hash -2048536542, now seen corresponding path program 1 times [2023-11-24 23:15:48,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:48,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843010017] [2023-11-24 23:15:48,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:48,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-24 23:15:48,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:48,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843010017] [2023-11-24 23:15:48,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843010017] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:15:48,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773580981] [2023-11-24 23:15:48,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:48,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:48,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:15:48,706 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:15:48,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:15:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:49,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 1798 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 23:15:49,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:15:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-24 23:15:49,261 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:15:49,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773580981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:15:49,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:15:49,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-24 23:15:49,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663175957] [2023-11-24 23:15:49,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:15:49,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:15:49,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:49,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:15:49,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:15:49,264 INFO L87 Difference]: Start difference. First operand 21344 states and 37354 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-24 23:15:51,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:51,405 INFO L93 Difference]: Finished difference Result 45167 states and 82294 transitions. [2023-11-24 23:15:51,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:15:51,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 145 [2023-11-24 23:15:51,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:51,563 INFO L225 Difference]: With dead ends: 45167 [2023-11-24 23:15:51,563 INFO L226 Difference]: Without dead ends: 23840 [2023-11-24 23:15:51,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:15:51,648 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 213 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:15:51,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1407 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:15:51,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23840 states. [2023-11-24 23:15:54,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23840 to 23840. [2023-11-24 23:15:54,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23840 states, 17836 states have (on average 1.6453801300740076) internal successors, (29347), 18944 states have internal predecessors, (29347), 4621 states have call successors, (4621), 1127 states have call predecessors, (4621), 1382 states have return successors, (8058), 4178 states have call predecessors, (8058), 4616 states have call successors, (8058) [2023-11-24 23:15:54,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23840 states to 23840 states and 42026 transitions. [2023-11-24 23:15:54,213 INFO L78 Accepts]: Start accepts. Automaton has 23840 states and 42026 transitions. Word has length 145 [2023-11-24 23:15:54,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:54,214 INFO L495 AbstractCegarLoop]: Abstraction has 23840 states and 42026 transitions. [2023-11-24 23:15:54,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-24 23:15:54,214 INFO L276 IsEmpty]: Start isEmpty. Operand 23840 states and 42026 transitions. [2023-11-24 23:15:54,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-24 23:15:54,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:54,229 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:15:54,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:15:54,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-24 23:15:54,438 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:54,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:54,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1826545700, now seen corresponding path program 1 times [2023-11-24 23:15:54,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:54,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809259552] [2023-11-24 23:15:54,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:54,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-24 23:15:54,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:54,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809259552] [2023-11-24 23:15:54,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809259552] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:15:54,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699713129] [2023-11-24 23:15:54,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:54,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:54,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:15:54,747 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:15:54,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b23de3a2-cff8-4ef4-a0ec-657e39bd2110/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:15:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:55,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 1803 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 23:15:55,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:15:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-24 23:15:55,257 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:15:55,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699713129] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:15:55,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:15:55,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-24 23:15:55,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814409309] [2023-11-24 23:15:55,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:15:55,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:15:55,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:55,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:15:55,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:15:55,260 INFO L87 Difference]: Start difference. First operand 23840 states and 42026 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24)