./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product29.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_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a9d4bfafe2ee2b10c7451875462462bdbc63aaee25e1868c3faa4756fb5ebfc5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:26:42,228 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:26:42,291 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 16:26:42,295 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:26:42,296 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:26:42,327 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:26:42,327 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:26:42,328 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:26:42,329 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:26:42,329 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:26:42,330 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:26:42,330 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:26:42,331 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:26:42,331 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:26:42,332 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:26:42,332 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:26:42,333 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:26:42,333 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:26:42,334 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:26:42,334 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:26:42,335 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:26:42,336 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:26:42,336 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:26:42,337 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:26:42,337 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:26:42,338 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:26:42,338 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:26:42,338 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:26:42,339 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:26:42,346 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:26:42,346 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:26:42,347 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:26:42,347 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:26:42,347 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:26:42,348 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:26:42,348 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:26:42,349 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:26:42,349 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:26:42,349 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:26:42,349 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:26:42,349 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:26:42,350 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:26:42,350 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:26:42,350 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:26:42,350 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:26:42,351 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:26:42,351 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:26:42,351 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_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9d4bfafe2ee2b10c7451875462462bdbc63aaee25e1868c3faa4756fb5ebfc5 [2023-12-02 16:26:42,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:26:42,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:26:42,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:26:42,583 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:26:42,584 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:26:42,585 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c [2023-12-02 16:26:45,344 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:26:45,653 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:26:45,653 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c [2023-12-02 16:26:45,677 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/data/58e9bf044/b51c48cec4844402b5c7ced369ccdcb4/FLAGae9a60380 [2023-12-02 16:26:45,691 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/data/58e9bf044/b51c48cec4844402b5c7ced369ccdcb4 [2023-12-02 16:26:45,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:26:45,695 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:26:45,696 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:26:45,696 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:26:45,701 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:26:45,702 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:26:45" (1/1) ... [2023-12-02 16:26:45,703 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25f46e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:26:45, skipping insertion in model container [2023-12-02 16:26:45,704 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:26:45" (1/1) ... [2023-12-02 16:26:45,776 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:26:46,003 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_8ea456a7-07d3-4865-8270-6020f9b80059/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c[17414,17427] [2023-12-02 16:26:46,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:26:46,234 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:26:46,241 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [48] [2023-12-02 16:26:46,242 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [716] [2023-12-02 16:26:46,242 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [725] [2023-12-02 16:26:46,242 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [739] [2023-12-02 16:26:46,243 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [2285] [2023-12-02 16:26:46,243 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2651] [2023-12-02 16:26:46,243 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [3008] [2023-12-02 16:26:46,243 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [3126] [2023-12-02 16:26:46,243 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [3217] [2023-12-02 16:26:46,244 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [3398] [2023-12-02 16:26:46,262 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_8ea456a7-07d3-4865-8270-6020f9b80059/sv-benchmarks/c/product-lines/elevator_spec2_product29.cil.c[17414,17427] [2023-12-02 16:26:46,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:26:46,382 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:26:46,383 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:26:46 WrapperNode [2023-12-02 16:26:46,383 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:26:46,384 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:26:46,384 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:26:46,384 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:26:46,392 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:26:46" (1/1) ... [2023-12-02 16:26:46,438 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:26:46" (1/1) ... [2023-12-02 16:26:46,481 INFO L138 Inliner]: procedures = 93, calls = 341, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 904 [2023-12-02 16:26:46,481 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:26:46,482 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:26:46,482 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:26:46,482 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:26:46,491 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:26:46" (1/1) ... [2023-12-02 16:26:46,491 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:26:46" (1/1) ... [2023-12-02 16:26:46,497 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:26:46" (1/1) ... [2023-12-02 16:26:46,498 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:26:46" (1/1) ... [2023-12-02 16:26:46,518 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:26:46" (1/1) ... [2023-12-02 16:26:46,531 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:26:46" (1/1) ... [2023-12-02 16:26:46,538 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:26:46" (1/1) ... [2023-12-02 16:26:46,544 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:26:46" (1/1) ... [2023-12-02 16:26:46,555 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:26:46,556 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:26:46,556 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:26:46,556 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:26:46,557 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:26:46" (1/1) ... [2023-12-02 16:26:46,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:26:46,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:26:46,597 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:26:46,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:26:46,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:26:46,627 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-12-02 16:26:46,627 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-12-02 16:26:46,627 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-12-02 16:26:46,627 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-12-02 16:26:46,627 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-12-02 16:26:46,627 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-12-02 16:26:46,627 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-12-02 16:26:46,628 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-12-02 16:26:46,628 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-12-02 16:26:46,628 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-12-02 16:26:46,628 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2023-12-02 16:26:46,628 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2023-12-02 16:26:46,628 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-12-02 16:26:46,628 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-12-02 16:26:46,629 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-12-02 16:26:46,629 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-12-02 16:26:46,629 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-12-02 16:26:46,629 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-12-02 16:26:46,629 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-12-02 16:26:46,629 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-12-02 16:26:46,629 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-12-02 16:26:46,629 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-12-02 16:26:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-12-02 16:26:46,630 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-12-02 16:26:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-12-02 16:26:46,630 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-12-02 16:26:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-12-02 16:26:46,630 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-12-02 16:26:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-12-02 16:26:46,631 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-12-02 16:26:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-12-02 16:26:46,631 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-12-02 16:26:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-12-02 16:26:46,631 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-12-02 16:26:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-12-02 16:26:46,631 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-12-02 16:26:46,632 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-12-02 16:26:46,632 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-12-02 16:26:46,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:26:46,632 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2023-12-02 16:26:46,632 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2023-12-02 16:26:46,632 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-12-02 16:26:46,632 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-12-02 16:26:46,633 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-12-02 16:26:46,633 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-12-02 16:26:46,633 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-12-02 16:26:46,633 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-12-02 16:26:46,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:26:46,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:26:46,633 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-12-02 16:26:46,633 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-12-02 16:26:46,763 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:26:46,766 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:26:47,738 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:26:48,620 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:26:48,620 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 16:26:48,622 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:26:48 BoogieIcfgContainer [2023-12-02 16:26:48,622 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:26:48,625 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:26:48,625 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:26:48,628 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:26:48,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:26:45" (1/3) ... [2023-12-02 16:26:48,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217f6a80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:26:48, skipping insertion in model container [2023-12-02 16:26:48,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:26:46" (2/3) ... [2023-12-02 16:26:48,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217f6a80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:26:48, skipping insertion in model container [2023-12-02 16:26:48,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:26:48" (3/3) ... [2023-12-02 16:26:48,631 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product29.cil.c [2023-12-02 16:26:48,649 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:26:48,650 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:26:48,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:26:48,716 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;@5620f0bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:26:48,716 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 16:26:48,722 INFO L276 IsEmpty]: Start isEmpty. Operand has 374 states, 253 states have (on average 1.5968379446640317) internal successors, (404), 274 states have internal predecessors, (404), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2023-12-02 16:26:48,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-02 16:26:48,747 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:26:48,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:26:48,748 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:26:48,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:26:48,753 INFO L85 PathProgramCache]: Analyzing trace with hash 133265953, now seen corresponding path program 1 times [2023-12-02 16:26:48,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:26:48,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059832367] [2023-12-02 16:26:48,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:26:48,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:26:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:26:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:26:49,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:26:49,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059832367] [2023-12-02 16:26:49,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059832367] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:26:49,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:26:49,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:26:49,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477271142] [2023-12-02 16:26:49,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:26:49,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:26:49,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:26:49,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:26:49,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:26:49,397 INFO L87 Difference]: Start difference. First operand has 374 states, 253 states have (on average 1.5968379446640317) internal successors, (404), 274 states have internal predecessors, (404), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 16:26:49,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:26:49,865 INFO L93 Difference]: Finished difference Result 844 states and 1368 transitions. [2023-12-02 16:26:49,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:26:49,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 65 [2023-12-02 16:26:49,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:26:49,901 INFO L225 Difference]: With dead ends: 844 [2023-12-02 16:26:49,901 INFO L226 Difference]: Without dead ends: 483 [2023-12-02 16:26:49,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:26:49,913 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 282 mSDsluCounter, 1672 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 2285 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:26:49,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 2285 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:26:49,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2023-12-02 16:26:49,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 373. [2023-12-02 16:26:49,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 254 states have (on average 1.578740157480315) internal successors, (401), 273 states have internal predecessors, (401), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2023-12-02 16:26:50,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 586 transitions. [2023-12-02 16:26:50,002 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 586 transitions. Word has length 65 [2023-12-02 16:26:50,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:26:50,003 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 586 transitions. [2023-12-02 16:26:50,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 16:26:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 586 transitions. [2023-12-02 16:26:50,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-02 16:26:50,010 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:26:50,010 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:26:50,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:26:50,011 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:26:50,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:26:50,012 INFO L85 PathProgramCache]: Analyzing trace with hash 377905146, now seen corresponding path program 1 times [2023-12-02 16:26:50,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:26:50,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816204836] [2023-12-02 16:26:50,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:26:50,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:26:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:26:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:26:50,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:26:50,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816204836] [2023-12-02 16:26:50,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816204836] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:26:50,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:26:50,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 16:26:50,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156560613] [2023-12-02 16:26:50,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:26:50,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 16:26:50,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:26:50,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 16:26:50,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 16:26:50,390 INFO L87 Difference]: Start difference. First operand 373 states and 586 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 16:26:53,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:26:53,233 INFO L93 Difference]: Finished difference Result 1280 states and 2045 transitions. [2023-12-02 16:26:53,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 16:26:53,234 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 68 [2023-12-02 16:26:53,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:26:53,244 INFO L225 Difference]: With dead ends: 1280 [2023-12-02 16:26:53,244 INFO L226 Difference]: Without dead ends: 923 [2023-12-02 16:26:53,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-12-02 16:26:53,248 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 1733 mSDsluCounter, 2079 mSDsCounter, 0 mSdLazyCounter, 3522 mSolverCounterSat, 547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1798 SdHoareTripleChecker+Valid, 2473 SdHoareTripleChecker+Invalid, 4069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 3522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:26:53,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1798 Valid, 2473 Invalid, 4069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 3522 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 16:26:53,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2023-12-02 16:26:53,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 867. [2023-12-02 16:26:53,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 611 states have (on average 1.5973813420621932) internal successors, (976), 642 states have internal predecessors, (976), 203 states have call successors, (203), 48 states have call predecessors, (203), 52 states have return successors, (210), 201 states have call predecessors, (210), 198 states have call successors, (210) [2023-12-02 16:26:53,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1389 transitions. [2023-12-02 16:26:53,329 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1389 transitions. Word has length 68 [2023-12-02 16:26:53,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:26:53,329 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 1389 transitions. [2023-12-02 16:26:53,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 16:26:53,330 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1389 transitions. [2023-12-02 16:26:53,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 16:26:53,334 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:26:53,334 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:26:53,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 16:26:53,334 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:26:53,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:26:53,335 INFO L85 PathProgramCache]: Analyzing trace with hash -111032477, now seen corresponding path program 1 times [2023-12-02 16:26:53,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:26:53,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803948435] [2023-12-02 16:26:53,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:26:53,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:26:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:26:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:26:53,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:26:53,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803948435] [2023-12-02 16:26:53,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803948435] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:26:53,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:26:53,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 16:26:53,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409734799] [2023-12-02 16:26:53,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:26:53,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:26:53,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:26:53,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:26:53,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:26:53,648 INFO L87 Difference]: Start difference. First operand 867 states and 1389 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-02 16:26:53,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:26:53,889 INFO L93 Difference]: Finished difference Result 1470 states and 2365 transitions. [2023-12-02 16:26:53,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:26:53,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 72 [2023-12-02 16:26:53,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:26:53,899 INFO L225 Difference]: With dead ends: 1470 [2023-12-02 16:26:53,899 INFO L226 Difference]: Without dead ends: 956 [2023-12-02 16:26:53,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:26:53,903 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 41 mSDsluCounter, 2906 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3503 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:26:53,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 3503 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:26:53,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2023-12-02 16:26:53,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 888. [2023-12-02 16:26:53,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 626 states have (on average 1.5830670926517572) internal successors, (991), 657 states have internal predecessors, (991), 203 states have call successors, (203), 48 states have call predecessors, (203), 58 states have return successors, (225), 207 states have call predecessors, (225), 198 states have call successors, (225) [2023-12-02 16:26:53,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1419 transitions. [2023-12-02 16:26:53,973 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1419 transitions. Word has length 72 [2023-12-02 16:26:53,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:26:53,974 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1419 transitions. [2023-12-02 16:26:53,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-02 16:26:53,989 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1419 transitions. [2023-12-02 16:26:53,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 16:26:53,993 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:26:53,993 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:26:53,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 16:26:53,994 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:26:53,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:26:53,995 INFO L85 PathProgramCache]: Analyzing trace with hash -483062931, now seen corresponding path program 1 times [2023-12-02 16:26:53,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:26:53,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110430448] [2023-12-02 16:26:53,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:26:53,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:26:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:26:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:26:54,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:26:54,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110430448] [2023-12-02 16:26:54,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110430448] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:26:54,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:26:54,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 16:26:54,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594167690] [2023-12-02 16:26:54,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:26:54,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:26:54,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:26:54,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:26:54,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:26:54,295 INFO L87 Difference]: Start difference. First operand 888 states and 1419 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-02 16:26:54,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:26:54,532 INFO L93 Difference]: Finished difference Result 1499 states and 2403 transitions. [2023-12-02 16:26:54,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:26:54,532 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2023-12-02 16:26:54,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:26:54,541 INFO L225 Difference]: With dead ends: 1499 [2023-12-02 16:26:54,541 INFO L226 Difference]: Without dead ends: 971 [2023-12-02 16:26:54,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:26:54,545 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 41 mSDsluCounter, 2906 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3503 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:26:54,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 3503 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:26:54,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2023-12-02 16:26:54,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 891. [2023-12-02 16:26:54,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 629 states have (on average 1.5802861685214626) internal successors, (994), 657 states have internal predecessors, (994), 203 states have call successors, (203), 48 states have call predecessors, (203), 58 states have return successors, (225), 210 states have call predecessors, (225), 198 states have call successors, (225) [2023-12-02 16:26:54,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1422 transitions. [2023-12-02 16:26:54,608 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1422 transitions. Word has length 73 [2023-12-02 16:26:54,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:26:54,608 INFO L495 AbstractCegarLoop]: Abstraction has 891 states and 1422 transitions. [2023-12-02 16:26:54,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-02 16:26:54,609 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1422 transitions. [2023-12-02 16:26:54,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 16:26:54,612 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:26:54,612 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:26:54,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 16:26:54,612 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:26:54,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:26:54,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1688878477, now seen corresponding path program 1 times [2023-12-02 16:26:54,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:26:54,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49805151] [2023-12-02 16:26:54,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:26:54,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:26:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:26:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:26:55,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:26:55,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49805151] [2023-12-02 16:26:55,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49805151] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:26:55,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:26:55,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 16:26:55,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181811511] [2023-12-02 16:26:55,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:26:55,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:26:55,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:26:55,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:26:55,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:26:55,575 INFO L87 Difference]: Start difference. First operand 891 states and 1422 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 16:26:59,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:26:59,190 INFO L93 Difference]: Finished difference Result 3870 states and 6302 transitions. [2023-12-02 16:26:59,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 16:26:59,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 73 [2023-12-02 16:26:59,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:26:59,215 INFO L225 Difference]: With dead ends: 3870 [2023-12-02 16:26:59,215 INFO L226 Difference]: Without dead ends: 2996 [2023-12-02 16:26:59,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-12-02 16:26:59,222 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 2602 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 2411 mSolverCounterSat, 1166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2709 SdHoareTripleChecker+Valid, 1538 SdHoareTripleChecker+Invalid, 3577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1166 IncrementalHoareTripleChecker+Valid, 2411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:26:59,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2709 Valid, 1538 Invalid, 3577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1166 Valid, 2411 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-12-02 16:26:59,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2996 states. [2023-12-02 16:26:59,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2996 to 2724. [2023-12-02 16:26:59,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 1916 states have (on average 1.5751565762004176) internal successors, (3018), 2020 states have internal predecessors, (3018), 645 states have call successors, (645), 128 states have call predecessors, (645), 162 states have return successors, (735), 646 states have call predecessors, (735), 640 states have call successors, (735) [2023-12-02 16:26:59,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 4398 transitions. [2023-12-02 16:26:59,507 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 4398 transitions. Word has length 73 [2023-12-02 16:26:59,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:26:59,507 INFO L495 AbstractCegarLoop]: Abstraction has 2724 states and 4398 transitions. [2023-12-02 16:26:59,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 16:26:59,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 4398 transitions. [2023-12-02 16:26:59,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-02 16:26:59,511 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:26:59,511 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:26:59,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 16:26:59,512 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:26:59,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:26:59,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2108976672, now seen corresponding path program 1 times [2023-12-02 16:26:59,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:26:59,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770426058] [2023-12-02 16:26:59,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:26:59,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:26:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:26:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:26:59,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:26:59,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770426058] [2023-12-02 16:26:59,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770426058] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:26:59,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:26:59,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 16:26:59,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729315598] [2023-12-02 16:26:59,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:26:59,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:26:59,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:26:59,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:26:59,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:26:59,790 INFO L87 Difference]: Start difference. First operand 2724 states and 4398 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2023-12-02 16:27:02,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:27:02,037 INFO L93 Difference]: Finished difference Result 6160 states and 9996 transitions. [2023-12-02 16:27:02,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:27:02,038 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 79 [2023-12-02 16:27:02,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:27:02,072 INFO L225 Difference]: With dead ends: 6160 [2023-12-02 16:27:02,073 INFO L226 Difference]: Without dead ends: 4149 [2023-12-02 16:27:02,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-02 16:27:02,089 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 2609 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1888 mSolverCounterSat, 1117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2773 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 3005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1117 IncrementalHoareTripleChecker+Valid, 1888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 16:27:02,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2773 Valid, 1169 Invalid, 3005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1117 Valid, 1888 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 16:27:02,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4149 states. [2023-12-02 16:27:02,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4149 to 3973. [2023-12-02 16:27:02,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3973 states, 2745 states have (on average 1.5340619307832422) internal successors, (4211), 2908 states have internal predecessors, (4211), 970 states have call successors, (970), 210 states have call predecessors, (970), 257 states have return successors, (1129), 960 states have call predecessors, (1129), 965 states have call successors, (1129) [2023-12-02 16:27:02,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3973 states to 3973 states and 6310 transitions. [2023-12-02 16:27:02,587 INFO L78 Accepts]: Start accepts. Automaton has 3973 states and 6310 transitions. Word has length 79 [2023-12-02 16:27:02,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:27:02,587 INFO L495 AbstractCegarLoop]: Abstraction has 3973 states and 6310 transitions. [2023-12-02 16:27:02,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2023-12-02 16:27:02,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3973 states and 6310 transitions. [2023-12-02 16:27:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-02 16:27:02,591 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:27:02,591 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:27:02,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 16:27:02,591 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:27:02,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:27:02,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1262914207, now seen corresponding path program 1 times [2023-12-02 16:27:02,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:27:02,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863752870] [2023-12-02 16:27:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:27:02,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:27:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:27:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:27:02,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:27:02,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863752870] [2023-12-02 16:27:02,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863752870] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:27:02,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:27:02,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 16:27:02,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502799697] [2023-12-02 16:27:02,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:27:02,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:27:02,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:27:02,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:27:02,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:27:02,824 INFO L87 Difference]: Start difference. First operand 3973 states and 6310 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 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) [2023-12-02 16:27:04,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:27:04,600 INFO L93 Difference]: Finished difference Result 7514 states and 11987 transitions. [2023-12-02 16:27:04,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 16:27:04,600 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 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 82 [2023-12-02 16:27:04,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:27:04,628 INFO L225 Difference]: With dead ends: 7514 [2023-12-02 16:27:04,628 INFO L226 Difference]: Without dead ends: 4479 [2023-12-02 16:27:04,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-12-02 16:27:04,639 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 991 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 2204 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 2594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 2204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:27:04,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1067 Valid, 1606 Invalid, 2594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 2204 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 16:27:04,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4479 states. [2023-12-02 16:27:05,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4479 to 4054. [2023-12-02 16:27:05,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4054 states, 2799 states have (on average 1.528045730618078) internal successors, (4277), 2974 states have internal predecessors, (4277), 973 states have call successors, (973), 225 states have call predecessors, (973), 281 states have return successors, (1163), 960 states have call predecessors, (1163), 968 states have call successors, (1163) [2023-12-02 16:27:05,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4054 states to 4054 states and 6413 transitions. [2023-12-02 16:27:05,187 INFO L78 Accepts]: Start accepts. Automaton has 4054 states and 6413 transitions. Word has length 82 [2023-12-02 16:27:05,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:27:05,187 INFO L495 AbstractCegarLoop]: Abstraction has 4054 states and 6413 transitions. [2023-12-02 16:27:05,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 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) [2023-12-02 16:27:05,187 INFO L276 IsEmpty]: Start isEmpty. Operand 4054 states and 6413 transitions. [2023-12-02 16:27:05,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-02 16:27:05,190 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:27:05,190 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:27:05,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 16:27:05,191 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:27:05,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:27:05,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1560568777, now seen corresponding path program 1 times [2023-12-02 16:27:05,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:27:05,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404833759] [2023-12-02 16:27:05,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:27:05,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:27:05,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:27:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:27:05,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:27:05,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404833759] [2023-12-02 16:27:05,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404833759] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:27:05,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:27:05,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:27:05,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869899791] [2023-12-02 16:27:05,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:27:05,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:27:05,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:27:05,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:27:05,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:27:05,388 INFO L87 Difference]: Start difference. First operand 4054 states and 6413 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 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) [2023-12-02 16:27:06,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:27:06,205 INFO L93 Difference]: Finished difference Result 4158 states and 6575 transitions. [2023-12-02 16:27:06,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:27:06,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 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 86 [2023-12-02 16:27:06,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:27:06,237 INFO L225 Difference]: With dead ends: 4158 [2023-12-02 16:27:06,237 INFO L226 Difference]: Without dead ends: 4143 [2023-12-02 16:27:06,240 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 [2023-12-02 16:27:06,240 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 647 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:27:06,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 1801 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:27:06,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2023-12-02 16:27:06,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 4060. [2023-12-02 16:27:06,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4060 states, 2805 states have (on average 1.526916221033868) internal successors, (4283), 2980 states have internal predecessors, (4283), 973 states have call successors, (973), 225 states have call predecessors, (973), 281 states have return successors, (1163), 960 states have call predecessors, (1163), 968 states have call successors, (1163) [2023-12-02 16:27:06,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 6419 transitions. [2023-12-02 16:27:06,610 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 6419 transitions. Word has length 86 [2023-12-02 16:27:06,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:27:06,610 INFO L495 AbstractCegarLoop]: Abstraction has 4060 states and 6419 transitions. [2023-12-02 16:27:06,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 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) [2023-12-02 16:27:06,611 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 6419 transitions. [2023-12-02 16:27:06,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-12-02 16:27:06,614 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:27:06,614 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:27:06,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 16:27:06,614 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:27:06,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:27:06,615 INFO L85 PathProgramCache]: Analyzing trace with hash -923914428, now seen corresponding path program 1 times [2023-12-02 16:27:06,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:27:06,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800003089] [2023-12-02 16:27:06,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:27:06,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:27:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:27:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 16:27:07,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:27:07,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800003089] [2023-12-02 16:27:07,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800003089] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:27:07,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113447062] [2023-12-02 16:27:07,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:27:07,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:27:07,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:27:07,331 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:27:07,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:27:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:27:07,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:27:07,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:27:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:27:07,735 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:27:07,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113447062] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:27:07,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:27:07,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 19 [2023-12-02 16:27:07,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926840467] [2023-12-02 16:27:07,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:27:07,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:27:07,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:27:07,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:27:07,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2023-12-02 16:27:07,738 INFO L87 Difference]: Start difference. First operand 4060 states and 6419 transitions. Second operand has 5 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2023-12-02 16:27:08,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:27:08,166 INFO L93 Difference]: Finished difference Result 4081 states and 6446 transitions. [2023-12-02 16:27:08,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:27:08,167 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 91 [2023-12-02 16:27:08,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:27:08,185 INFO L225 Difference]: With dead ends: 4081 [2023-12-02 16:27:08,185 INFO L226 Difference]: Without dead ends: 4066 [2023-12-02 16:27:08,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2023-12-02 16:27:08,188 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 30 mSDsluCounter, 1611 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2160 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:27:08,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2160 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:27:08,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4066 states. [2023-12-02 16:27:08,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4066 to 4060. [2023-12-02 16:27:08,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4060 states, 2805 states have (on average 1.5240641711229947) internal successors, (4275), 2980 states have internal predecessors, (4275), 973 states have call successors, (973), 225 states have call predecessors, (973), 281 states have return successors, (1163), 960 states have call predecessors, (1163), 968 states have call successors, (1163) [2023-12-02 16:27:08,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 6411 transitions. [2023-12-02 16:27:08,558 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 6411 transitions. Word has length 91 [2023-12-02 16:27:08,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:27:08,559 INFO L495 AbstractCegarLoop]: Abstraction has 4060 states and 6411 transitions. [2023-12-02 16:27:08,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2023-12-02 16:27:08,560 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 6411 transitions. [2023-12-02 16:27:08,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-12-02 16:27:08,563 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:27:08,563 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:27:08,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:27:08,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:27:08,764 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:27:08,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:27:08,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1281359522, now seen corresponding path program 1 times [2023-12-02 16:27:08,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:27:08,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723748100] [2023-12-02 16:27:08,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:27:08,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:27:08,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:27:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 16:27:08,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:27:08,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723748100] [2023-12-02 16:27:08,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723748100] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:27:08,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:27:08,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:27:08,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923325794] [2023-12-02 16:27:08,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:27:08,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:27:08,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:27:08,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:27:08,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:27:08,942 INFO L87 Difference]: Start difference. First operand 4060 states and 6411 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2023-12-02 16:27:10,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:27:10,633 INFO L93 Difference]: Finished difference Result 11571 states and 18547 transitions. [2023-12-02 16:27:10,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:27:10,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 [2023-12-02 16:27:10,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:27:10,665 INFO L225 Difference]: With dead ends: 11571 [2023-12-02 16:27:10,665 INFO L226 Difference]: Without dead ends: 7530 [2023-12-02 16:27:10,679 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 [2023-12-02 16:27:10,679 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 1161 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:27:10,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1232 Valid, 680 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 16:27:10,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7530 states. [2023-12-02 16:27:11,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7530 to 6984. [2023-12-02 16:27:11,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6984 states, 4864 states have (on average 1.533922697368421) internal successors, (7461), 5174 states have internal predecessors, (7461), 1645 states have call successors, (1645), 363 states have call predecessors, (1645), 474 states have return successors, (2041), 1577 states have call predecessors, (2041), 1640 states have call successors, (2041) [2023-12-02 16:27:11,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6984 states to 6984 states and 11147 transitions. [2023-12-02 16:27:11,272 INFO L78 Accepts]: Start accepts. Automaton has 6984 states and 11147 transitions. Word has length 97 [2023-12-02 16:27:11,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:27:11,273 INFO L495 AbstractCegarLoop]: Abstraction has 6984 states and 11147 transitions. [2023-12-02 16:27:11,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2023-12-02 16:27:11,273 INFO L276 IsEmpty]: Start isEmpty. Operand 6984 states and 11147 transitions. [2023-12-02 16:27:11,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-12-02 16:27:11,275 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:27:11,276 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:27:11,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 16:27:11,276 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:27:11,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:27:11,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1067302979, now seen corresponding path program 1 times [2023-12-02 16:27:11,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:27:11,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048181427] [2023-12-02 16:27:11,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:27:11,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:27:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:27:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 16:27:12,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:27:12,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048181427] [2023-12-02 16:27:12,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048181427] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:27:12,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069679301] [2023-12-02 16:27:12,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:27:12,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:27:12,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:27:12,064 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:27:12,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:27:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:27:12,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 1455 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:27:12,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:27:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 16:27:12,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:27:12,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069679301] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:27:12,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:27:12,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [19] total 24 [2023-12-02 16:27:12,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289725072] [2023-12-02 16:27:12,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:27:12,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:27:12,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:27:12,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:27:12,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2023-12-02 16:27:12,963 INFO L87 Difference]: Start difference. First operand 6984 states and 11147 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-12-02 16:27:15,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:27:15,161 INFO L93 Difference]: Finished difference Result 15212 states and 24222 transitions. [2023-12-02 16:27:15,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:27:15,161 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 98 [2023-12-02 16:27:15,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:27:15,193 INFO L225 Difference]: With dead ends: 15212 [2023-12-02 16:27:15,193 INFO L226 Difference]: Without dead ends: 8244 [2023-12-02 16:27:15,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2023-12-02 16:27:15,219 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 737 mSDsluCounter, 1222 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 1551 SdHoareTripleChecker+Invalid, 2285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:27:15,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 1551 Invalid, 2285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 1969 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 16:27:15,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8244 states. [2023-12-02 16:27:16,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8244 to 8194. [2023-12-02 16:27:16,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8194 states, 5730 states have (on average 1.5270506108202444) internal successors, (8750), 6068 states have internal predecessors, (8750), 1901 states have call successors, (1901), 436 states have call predecessors, (1901), 562 states have return successors, (2353), 1821 states have call predecessors, (2353), 1896 states have call successors, (2353) [2023-12-02 16:27:16,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8194 states to 8194 states and 13004 transitions. [2023-12-02 16:27:16,084 INFO L78 Accepts]: Start accepts. Automaton has 8194 states and 13004 transitions. Word has length 98 [2023-12-02 16:27:16,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:27:16,085 INFO L495 AbstractCegarLoop]: Abstraction has 8194 states and 13004 transitions. [2023-12-02 16:27:16,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-12-02 16:27:16,085 INFO L276 IsEmpty]: Start isEmpty. Operand 8194 states and 13004 transitions. [2023-12-02 16:27:16,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-12-02 16:27:16,088 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:27:16,088 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:27:16,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:27:16,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:27:16,289 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:27:16,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:27:16,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1632784066, now seen corresponding path program 1 times [2023-12-02 16:27:16,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:27:16,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689976501] [2023-12-02 16:27:16,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:27:16,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:27:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:27:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 16:27:16,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:27:16,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689976501] [2023-12-02 16:27:16,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689976501] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:27:16,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324613934] [2023-12-02 16:27:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:27:16,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:27:16,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:27:16,851 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:27:16,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:27:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:27:17,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 1461 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 16:27:17,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:27:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:27:19,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:27:52,808 WARN L293 SmtUtils]: Spent 33.46s on a formula simplification. DAG size of input: 766 DAG size of output: 43 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-02 16:28:29,190 WARN L293 SmtUtils]: Spent 32.20s on a formula simplification. DAG size of input: 766 DAG size of output: 43 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-02 16:29:01,762 WARN L293 SmtUtils]: Spent 32.22s on a formula simplification. DAG size of input: 766 DAG size of output: 43 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-02 16:29:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 16:29:01,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324613934] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:29:01,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1937551363] [2023-12-02 16:29:01,851 INFO L159 IcfgInterpreter]: Started Sifa with 96 locations of interest [2023-12-02 16:29:01,851 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:29:01,853 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:29:01,857 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:29:01,857 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:29:17,322 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 584 for LOIs [2023-12-02 16:29:44,835 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 584 for LOIs [2023-12-02 16:30:51,464 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 449 for LOIs [2023-12-02 16:30:51,970 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 445 for LOIs [2023-12-02 16:30:52,444 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 515 for LOIs [2023-12-02 16:30:54,500 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 485 for LOIs [2023-12-02 16:30:55,937 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 577 for LOIs [2023-12-02 16:31:09,333 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 581 for LOIs [2023-12-02 16:31:12,473 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 479 for LOIs [2023-12-02 16:31:13,252 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 449 for LOIs [2023-12-02 16:31:17,421 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 445 for LOIs [2023-12-02 16:31:17,849 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 509 for LOIs [2023-12-02 16:31:18,516 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:31:40,062 WARN L293 SmtUtils]: Spent 5.01s on a formula simplification that was a NOOP. DAG size: 579 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:31:45,575 WARN L293 SmtUtils]: Spent 5.19s on a formula simplification that was a NOOP. DAG size: 579 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:32:24,632 WARN L293 SmtUtils]: Spent 12.72s on a formula simplification. DAG size of input: 515 DAG size of output: 485 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:32:37,624 WARN L293 SmtUtils]: Spent 12.54s on a formula simplification. DAG size of input: 556 DAG size of output: 492 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:34:11,001 WARN L293 SmtUtils]: Spent 9.92s on a formula simplification. DAG size of input: 635 DAG size of output: 631 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:34:18,257 WARN L293 SmtUtils]: Spent 6.73s on a formula simplification. DAG size of input: 485 DAG size of output: 481 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:34:25,769 WARN L293 SmtUtils]: Spent 6.91s on a formula simplification. DAG size of input: 489 DAG size of output: 485 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:34:36,531 WARN L293 SmtUtils]: Spent 10.10s on a formula simplification. DAG size of input: 637 DAG size of output: 633 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:34:47,413 WARN L293 SmtUtils]: Spent 10.17s on a formula simplification. DAG size of input: 644 DAG size of output: 640 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:34:58,197 WARN L293 SmtUtils]: Spent 10.02s on a formula simplification. DAG size of input: 646 DAG size of output: 642 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:35:09,067 WARN L293 SmtUtils]: Spent 10.08s on a formula simplification. DAG size of input: 648 DAG size of output: 644 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:35:20,275 WARN L293 SmtUtils]: Spent 10.38s on a formula simplification. DAG size of input: 650 DAG size of output: 646 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:35:30,998 WARN L293 SmtUtils]: Spent 9.84s on a formula simplification. DAG size of input: 652 DAG size of output: 625 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:35:41,982 WARN L293 SmtUtils]: Spent 10.10s on a formula simplification. DAG size of input: 654 DAG size of output: 627 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:35:53,594 WARN L293 SmtUtils]: Spent 10.76s on a formula simplification. DAG size of input: 654 DAG size of output: 627 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:36:36,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1937551363] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:36:36,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:36:36,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [11, 12, 12] total 85 [2023-12-02 16:36:36,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557898783] [2023-12-02 16:36:36,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:36:36,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-12-02 16:36:36,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:36:36,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-12-02 16:36:36,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=864, Invalid=6276, Unknown=0, NotChecked=0, Total=7140 [2023-12-02 16:36:36,664 INFO L87 Difference]: Start difference. First operand 8194 states and 13004 transitions. Second operand has 59 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 39 states have internal predecessors, (65), 14 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (16), 13 states have call predecessors, (16), 14 states have call successors, (16) [2023-12-02 16:36:47,619 WARN L293 SmtUtils]: Spent 5.31s on a formula simplification that was a NOOP. DAG size: 585 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:38:09,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:38:09,111 INFO L93 Difference]: Finished difference Result 16866 states and 26742 transitions. [2023-12-02 16:38:09,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-02 16:38:09,112 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 39 states have internal predecessors, (65), 14 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (16), 13 states have call predecessors, (16), 14 states have call successors, (16) Word has length 101 [2023-12-02 16:38:09,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:38:09,142 INFO L225 Difference]: With dead ends: 16866 [2023-12-02 16:38:09,142 INFO L226 Difference]: Without dead ends: 8677 [2023-12-02 16:38:09,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 347.8s TimeCoverageRelationStatistics Valid=956, Invalid=7234, Unknown=0, NotChecked=0, Total=8190 [2023-12-02 16:38:09,168 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 376 mSDsluCounter, 5783 mSDsCounter, 0 mSdLazyCounter, 12526 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 6215 SdHoareTripleChecker+Invalid, 12568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 12526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.9s IncrementalHoareTripleChecker+Time [2023-12-02 16:38:09,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 6215 Invalid, 12568 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [42 Valid, 12526 Invalid, 0 Unknown, 0 Unchecked, 61.9s Time] [2023-12-02 16:38:09,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8677 states. [2023-12-02 16:38:10,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8677 to 8483. [2023-12-02 16:38:10,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8483 states, 5949 states have (on average 1.5209278870398386) internal successors, (9048), 6290 states have internal predecessors, (9048), 1945 states have call successors, (1945), 456 states have call predecessors, (1945), 588 states have return successors, (2415), 1868 states have call predecessors, (2415), 1940 states have call successors, (2415) [2023-12-02 16:38:10,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8483 states to 8483 states and 13408 transitions. [2023-12-02 16:38:10,305 INFO L78 Accepts]: Start accepts. Automaton has 8483 states and 13408 transitions. Word has length 101 [2023-12-02 16:38:10,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:38:10,305 INFO L495 AbstractCegarLoop]: Abstraction has 8483 states and 13408 transitions. [2023-12-02 16:38:10,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 39 states have internal predecessors, (65), 14 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (16), 13 states have call predecessors, (16), 14 states have call successors, (16) [2023-12-02 16:38:10,306 INFO L276 IsEmpty]: Start isEmpty. Operand 8483 states and 13408 transitions. [2023-12-02 16:38:10,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-02 16:38:10,309 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:38:10,309 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:38:10,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 16:38:10,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 16:38:10,511 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:38:10,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:38:10,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1909409118, now seen corresponding path program 1 times [2023-12-02 16:38:10,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:38:10,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335454009] [2023-12-02 16:38:10,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:38:10,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:38:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:38:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 16:38:10,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:38:10,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335454009] [2023-12-02 16:38:10,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335454009] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:38:10,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:38:10,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 16:38:10,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23343915] [2023-12-02 16:38:10,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:38:10,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:38:10,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:38:10,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:38:10,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:38:10,730 INFO L87 Difference]: Start difference. First operand 8483 states and 13408 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2023-12-02 16:38:12,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:38:12,112 INFO L93 Difference]: Finished difference Result 15636 states and 24915 transitions. [2023-12-02 16:38:12,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:38:12,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) Word has length 109 [2023-12-02 16:38:12,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:38:12,139 INFO L225 Difference]: With dead ends: 15636 [2023-12-02 16:38:12,139 INFO L226 Difference]: Without dead ends: 9363 [2023-12-02 16:38:12,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:38:12,150 INFO L413 NwaCegarLoop]: 595 mSDtfsCounter, 36 mSDsluCounter, 2906 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3501 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:38:12,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 3501 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:38:12,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9363 states. [2023-12-02 16:38:13,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9363 to 8722. [2023-12-02 16:38:13,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8722 states, 6120 states have (on average 1.5102941176470588) internal successors, (9243), 6473 states have internal predecessors, (9243), 1955 states have call successors, (1955), 456 states have call predecessors, (1955), 646 states have return successors, (2525), 1924 states have call predecessors, (2525), 1950 states have call successors, (2525) [2023-12-02 16:38:13,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8722 states to 8722 states and 13723 transitions. [2023-12-02 16:38:13,223 INFO L78 Accepts]: Start accepts. Automaton has 8722 states and 13723 transitions. Word has length 109 [2023-12-02 16:38:13,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:38:13,223 INFO L495 AbstractCegarLoop]: Abstraction has 8722 states and 13723 transitions. [2023-12-02 16:38:13,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2023-12-02 16:38:13,223 INFO L276 IsEmpty]: Start isEmpty. Operand 8722 states and 13723 transitions. [2023-12-02 16:38:13,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-12-02 16:38:13,225 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:38:13,225 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:38:13,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 16:38:13,225 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:38:13,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:38:13,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1143710628, now seen corresponding path program 1 times [2023-12-02 16:38:13,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:38:13,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855787357] [2023-12-02 16:38:13,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:38:13,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:38:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:38:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:38:13,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:38:13,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855787357] [2023-12-02 16:38:13,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855787357] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:38:13,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:38:13,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 16:38:13,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461277124] [2023-12-02 16:38:13,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:38:13,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:38:13,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:38:13,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:38:13,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:38:13,379 INFO L87 Difference]: Start difference. First operand 8722 states and 13723 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2023-12-02 16:38:14,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:38:14,574 INFO L93 Difference]: Finished difference Result 15917 states and 25254 transitions. [2023-12-02 16:38:14,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:38:14,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) Word has length 110 [2023-12-02 16:38:14,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:38:14,611 INFO L225 Difference]: With dead ends: 15917 [2023-12-02 16:38:14,611 INFO L226 Difference]: Without dead ends: 9448 [2023-12-02 16:38:14,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:38:14,633 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 36 mSDsluCounter, 2915 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3512 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:38:14,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 3512 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:38:14,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9448 states. [2023-12-02 16:38:15,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9448 to 8740. [2023-12-02 16:38:15,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8740 states, 6155 states have (on average 1.5129163281884646) internal successors, (9312), 6467 states have internal predecessors, (9312), 1967 states have call successors, (1967), 452 states have call predecessors, (1967), 617 states have return successors, (2487), 1952 states have call predecessors, (2487), 1962 states have call successors, (2487) [2023-12-02 16:38:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8740 states to 8740 states and 13766 transitions. [2023-12-02 16:38:15,863 INFO L78 Accepts]: Start accepts. Automaton has 8740 states and 13766 transitions. Word has length 110 [2023-12-02 16:38:15,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:38:15,864 INFO L495 AbstractCegarLoop]: Abstraction has 8740 states and 13766 transitions. [2023-12-02 16:38:15,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2023-12-02 16:38:15,864 INFO L276 IsEmpty]: Start isEmpty. Operand 8740 states and 13766 transitions. [2023-12-02 16:38:15,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-02 16:38:15,866 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:38:15,866 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:38:15,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 16:38:15,866 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:38:15,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:38:15,867 INFO L85 PathProgramCache]: Analyzing trace with hash 594501565, now seen corresponding path program 1 times [2023-12-02 16:38:15,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:38:15,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54267902] [2023-12-02 16:38:15,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:38:15,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:38:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:38:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 16:38:16,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:38:16,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54267902] [2023-12-02 16:38:16,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54267902] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:38:16,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465741911] [2023-12-02 16:38:16,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:38:16,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:38:16,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:38:16,360 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:38:16,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ea456a7-07d3-4865-8270-6020f9b80059/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:38:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:38:16,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 1553 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-02 16:38:16,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:38:16,858 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 16:38:16,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:38:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 16:38:17,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465741911] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:38:17,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1675276479] [2023-12-02 16:38:17,541 INFO L159 IcfgInterpreter]: Started Sifa with 102 locations of interest [2023-12-02 16:38:17,541 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:38:17,542 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:38:17,542 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:38:17,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:38:31,119 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 584 for LOIs [2023-12-02 16:39:10,119 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 584 for LOIs [2023-12-02 16:40:00,050 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 456 for LOIs [2023-12-02 16:40:02,391 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 445 for LOIs [2023-12-02 16:40:02,859 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__empty with input of size 70 for LOIs [2023-12-02 16:40:03,250 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 63 for LOIs [2023-12-02 16:40:03,264 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 71 for LOIs [2023-12-02 16:40:03,300 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 469 for LOIs [2023-12-02 16:40:03,675 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 577 for LOIs [2023-12-02 16:40:16,429 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 581 for LOIs [2023-12-02 16:40:19,396 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 454 for LOIs [2023-12-02 16:40:20,785 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 459 for LOIs [2023-12-02 16:40:21,948 INFO L197 IcfgInterpreter]: Interpreting procedure getReverseHeading with input of size 458 for LOIs [2023-12-02 16:40:23,420 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 509 for LOIs [2023-12-02 16:40:24,083 INFO L180 IcfgInterpreter]: Interpretation finished