./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.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_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/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_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/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_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/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 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:43:48,358 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:43:48,417 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 16:43:48,422 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:43:48,423 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:43:48,443 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:43:48,443 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:43:48,444 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:43:48,444 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:43:48,445 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:43:48,445 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:43:48,446 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:43:48,447 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:43:48,447 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:43:48,448 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:43:48,448 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:43:48,449 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:43:48,449 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:43:48,450 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:43:48,450 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:43:48,451 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:43:48,451 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:43:48,452 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:43:48,453 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:43:48,453 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:43:48,453 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:43:48,454 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:43:48,454 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:43:48,455 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:43:48,455 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:43:48,455 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:43:48,456 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:43:48,456 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:43:48,457 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:43:48,457 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:43:48,457 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:43:48,458 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:43:48,458 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:43:48,458 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:43:48,458 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:43:48,458 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:43:48,459 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:43:48,459 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:43:48,459 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:43:48,459 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:43:48,460 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:43:48,460 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:43:48,460 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_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a [2023-12-02 16:43:48,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:43:48,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:43:48,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:43:48,690 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:43:48,690 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:43:48,691 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2023-12-02 16:43:51,351 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:43:51,632 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:43:51,632 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2023-12-02 16:43:51,654 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/data/09063c5af/ed4fbd0e5fda4795be4075c44e197671/FLAG1eec303b2 [2023-12-02 16:43:51,669 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/data/09063c5af/ed4fbd0e5fda4795be4075c44e197671 [2023-12-02 16:43:51,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:43:51,674 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:43:51,675 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:43:51,676 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:43:51,681 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:43:51,682 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:43:51" (1/1) ... [2023-12-02 16:43:51,683 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35b81c54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:43:51, skipping insertion in model container [2023-12-02 16:43:51,683 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:43:51" (1/1) ... [2023-12-02 16:43:51,768 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:43:52,108 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_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2023-12-02 16:43:52,233 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:43:52,248 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:43:52,260 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [48] [2023-12-02 16:43:52,262 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [1664] [2023-12-02 16:43:52,262 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [1702] [2023-12-02 16:43:52,262 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [1711] [2023-12-02 16:43:52,262 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [2373] [2023-12-02 16:43:52,263 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [2387] [2023-12-02 16:43:52,263 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [2506] [2023-12-02 16:43:52,263 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [2859] [2023-12-02 16:43:52,263 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [3225] [2023-12-02 16:43:52,263 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [3316] [2023-12-02 16:43:52,350 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_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2023-12-02 16:43:52,392 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:43:52,426 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:43:52,426 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:43:52 WrapperNode [2023-12-02 16:43:52,426 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:43:52,428 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:43:52,428 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:43:52,428 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:43:52,436 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:43:52" (1/1) ... [2023-12-02 16:43:52,465 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:43:52" (1/1) ... [2023-12-02 16:43:52,511 INFO L138 Inliner]: procedures = 97, calls = 348, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 1177 [2023-12-02 16:43:52,511 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:43:52,512 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:43:52,512 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:43:52,512 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:43:52,520 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:43:52" (1/1) ... [2023-12-02 16:43:52,520 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:43:52" (1/1) ... [2023-12-02 16:43:52,526 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:43:52" (1/1) ... [2023-12-02 16:43:52,526 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:43:52" (1/1) ... [2023-12-02 16:43:52,550 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:43:52" (1/1) ... [2023-12-02 16:43:52,569 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:43:52" (1/1) ... [2023-12-02 16:43:52,574 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:43:52" (1/1) ... [2023-12-02 16:43:52,581 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:43:52" (1/1) ... [2023-12-02 16:43:52,591 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:43:52,592 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:43:52,592 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:43:52,592 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:43:52,593 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:43:52" (1/1) ... [2023-12-02 16:43:52,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:43:52,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:43:52,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:43:52,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:43:52,675 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-12-02 16:43:52,675 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-12-02 16:43:52,675 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-12-02 16:43:52,675 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-12-02 16:43:52,676 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-12-02 16:43:52,676 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-12-02 16:43:52,676 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-12-02 16:43:52,676 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-12-02 16:43:52,676 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-12-02 16:43:52,677 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-12-02 16:43:52,677 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-12-02 16:43:52,677 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-12-02 16:43:52,677 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-12-02 16:43:52,677 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-12-02 16:43:52,677 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-12-02 16:43:52,678 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-12-02 16:43:52,678 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-12-02 16:43:52,678 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-12-02 16:43:52,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:43:52,678 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-12-02 16:43:52,678 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-12-02 16:43:52,679 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-12-02 16:43:52,679 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-12-02 16:43:52,679 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-12-02 16:43:52,679 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-12-02 16:43:52,679 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-12-02 16:43:52,679 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-12-02 16:43:52,680 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-12-02 16:43:52,680 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-12-02 16:43:52,680 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-12-02 16:43:52,680 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-12-02 16:43:52,680 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-12-02 16:43:52,680 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-12-02 16:43:52,680 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-12-02 16:43:52,681 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-12-02 16:43:52,681 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-12-02 16:43:52,681 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-12-02 16:43:52,681 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-12-02 16:43:52,681 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-12-02 16:43:52,681 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-12-02 16:43:52,682 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-12-02 16:43:52,682 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-12-02 16:43:52,682 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-12-02 16:43:52,682 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-12-02 16:43:52,682 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-12-02 16:43:52,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:43:52,682 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-12-02 16:43:52,683 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-12-02 16:43:52,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:43:52,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:43:52,683 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-12-02 16:43:52,683 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-12-02 16:43:52,683 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-12-02 16:43:52,684 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-12-02 16:43:52,837 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:43:52,839 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:43:53,811 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:43:54,646 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:43:54,647 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 16:43:54,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:43:54 BoogieIcfgContainer [2023-12-02 16:43:54,649 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:43:54,651 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:43:54,651 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:43:54,654 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:43:54,654 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:43:51" (1/3) ... [2023-12-02 16:43:54,655 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d7caa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:43:54, skipping insertion in model container [2023-12-02 16:43:54,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:43:52" (2/3) ... [2023-12-02 16:43:54,655 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d7caa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:43:54, skipping insertion in model container [2023-12-02 16:43:54,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:43:54" (3/3) ... [2023-12-02 16:43:54,656 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product28.cil.c [2023-12-02 16:43:54,675 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:43:54,676 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:43:54,736 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:43:54,742 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;@75644603, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:43:54,743 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 16:43:54,749 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 280 states have internal predecessors, (409), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2023-12-02 16:43:54,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 16:43:54,762 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:43:54,763 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] [2023-12-02 16:43:54,764 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:43:54,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:43:54,768 INFO L85 PathProgramCache]: Analyzing trace with hash 518682035, now seen corresponding path program 1 times [2023-12-02 16:43:54,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:43:54,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641964120] [2023-12-02 16:43:54,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:43:54,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:43:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:43:55,126 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 16:43:55,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:43:55,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641964120] [2023-12-02 16:43:55,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641964120] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:43:55,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:43:55,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:43:55,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249593970] [2023-12-02 16:43:55,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:43:55,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 16:43:55,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:43:55,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 16:43:55,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 16:43:55,166 INFO L87 Difference]: Start difference. First operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 280 states have internal predecessors, (409), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 16:43:55,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:43:55,332 INFO L93 Difference]: Finished difference Result 401 states and 634 transitions. [2023-12-02 16:43:55,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 16:43:55,335 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2023-12-02 16:43:55,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:43:55,352 INFO L225 Difference]: With dead ends: 401 [2023-12-02 16:43:55,352 INFO L226 Difference]: Without dead ends: 379 [2023-12-02 16:43:55,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 16:43:55,359 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:43:55,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 564 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:43:55,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-12-02 16:43:55,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2023-12-02 16:43:55,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 255 states have (on average 1.580392156862745) internal successors, (403), 276 states have internal predecessors, (403), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2023-12-02 16:43:55,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 596 transitions. [2023-12-02 16:43:55,438 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 596 transitions. Word has length 43 [2023-12-02 16:43:55,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:43:55,440 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 596 transitions. [2023-12-02 16:43:55,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 16:43:55,441 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 596 transitions. [2023-12-02 16:43:55,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 16:43:55,444 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:43:55,444 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] [2023-12-02 16:43:55,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:43:55,445 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:43:55,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:43:55,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1847035974, now seen corresponding path program 1 times [2023-12-02 16:43:55,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:43:55,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695404621] [2023-12-02 16:43:55,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:43:55,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:43:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:43:55,838 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 16:43:55,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:43:55,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695404621] [2023-12-02 16:43:55,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695404621] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:43:55,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:43:55,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:43:55,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136305187] [2023-12-02 16:43:55,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:43:55,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:43:55,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:43:55,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:43:55,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:43:55,842 INFO L87 Difference]: Start difference. First operand 379 states and 596 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 16:43:57,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:43:57,869 INFO L93 Difference]: Finished difference Result 1243 states and 1996 transitions. [2023-12-02 16:43:57,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:43:57,873 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2023-12-02 16:43:57,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:43:57,882 INFO L225 Difference]: With dead ends: 1243 [2023-12-02 16:43:57,883 INFO L226 Difference]: Without dead ends: 880 [2023-12-02 16:43:57,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:43:57,889 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 1225 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1293 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 1854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 16:43:57,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1293 Valid, 1025 Invalid, 1854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 16:43:57,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2023-12-02 16:43:57,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 793. [2023-12-02 16:43:57,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 556 states have (on average 1.6025179856115108) internal successors, (891), 586 states have internal predecessors, (891), 192 states have call successors, (192), 43 states have call predecessors, (192), 44 states have return successors, (194), 176 states have call predecessors, (194), 187 states have call successors, (194) [2023-12-02 16:43:57,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1277 transitions. [2023-12-02 16:43:57,972 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1277 transitions. Word has length 44 [2023-12-02 16:43:57,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:43:57,972 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1277 transitions. [2023-12-02 16:43:57,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 16:43:57,973 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1277 transitions. [2023-12-02 16:43:57,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-02 16:43:57,981 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:43:57,982 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:43:57,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 16:43:57,982 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:43:57,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:43:57,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1932256532, now seen corresponding path program 1 times [2023-12-02 16:43:57,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:43:57,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044333221] [2023-12-02 16:43:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:43:57,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:43:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:43:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:43:58,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:43:58,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044333221] [2023-12-02 16:43:58,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044333221] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:43:58,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:43:58,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 16:43:58,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122188849] [2023-12-02 16:43:58,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:43:58,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:43:58,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:43:58,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:43:58,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:43:58,455 INFO L87 Difference]: Start difference. First operand 793 states and 1277 transitions. Second operand has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2023-12-02 16:44:01,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:44:01,153 INFO L93 Difference]: Finished difference Result 2747 states and 4462 transitions. [2023-12-02 16:44:01,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 16:44:01,157 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2023-12-02 16:44:01,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:44:01,174 INFO L225 Difference]: With dead ends: 2747 [2023-12-02 16:44:01,174 INFO L226 Difference]: Without dead ends: 1970 [2023-12-02 16:44:01,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-12-02 16:44:01,182 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 1360 mSDsluCounter, 1607 mSDsCounter, 0 mSdLazyCounter, 4036 mSolverCounterSat, 653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1436 SdHoareTripleChecker+Valid, 2156 SdHoareTripleChecker+Invalid, 4689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 653 IncrementalHoareTripleChecker+Valid, 4036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:44:01,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1436 Valid, 2156 Invalid, 4689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [653 Valid, 4036 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-02 16:44:01,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2023-12-02 16:44:01,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1783. [2023-12-02 16:44:01,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1211 states have (on average 1.5730800990916598) internal successors, (1905), 1283 states have internal predecessors, (1905), 479 states have call successors, (479), 80 states have call predecessors, (479), 92 states have return successors, (498), 452 states have call predecessors, (498), 474 states have call successors, (498) [2023-12-02 16:44:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2882 transitions. [2023-12-02 16:44:01,366 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2882 transitions. Word has length 87 [2023-12-02 16:44:01,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:44:01,367 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 2882 transitions. [2023-12-02 16:44:01,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2023-12-02 16:44:01,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2882 transitions. [2023-12-02 16:44:01,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-02 16:44:01,372 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:44:01,372 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:44:01,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 16:44:01,373 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:44:01,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:44:01,373 INFO L85 PathProgramCache]: Analyzing trace with hash 2083523359, now seen corresponding path program 1 times [2023-12-02 16:44:01,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:44:01,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546794225] [2023-12-02 16:44:01,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:44:01,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:44:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:44:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:44:01,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:44:01,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546794225] [2023-12-02 16:44:01,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546794225] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:44:01,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:44:01,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 16:44:01,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545143271] [2023-12-02 16:44:01,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:44:01,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:44:01,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:44:01,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:44:01,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:44:01,817 INFO L87 Difference]: Start difference. First operand 1783 states and 2882 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2023-12-02 16:44:03,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:44:03,881 INFO L93 Difference]: Finished difference Result 4518 states and 7313 transitions. [2023-12-02 16:44:03,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 16:44:03,882 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 88 [2023-12-02 16:44:03,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:44:03,903 INFO L225 Difference]: With dead ends: 4518 [2023-12-02 16:44:03,903 INFO L226 Difference]: Without dead ends: 2753 [2023-12-02 16:44:03,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-12-02 16:44:03,915 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 1158 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 2211 mSolverCounterSat, 435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 2646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 435 IncrementalHoareTripleChecker+Valid, 2211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 16:44:03,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1235 Valid, 1659 Invalid, 2646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [435 Valid, 2211 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 16:44:03,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2023-12-02 16:44:04,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 2635. [2023-12-02 16:44:04,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 1815 states have (on average 1.5801652892561984) internal successors, (2868), 1914 states have internal predecessors, (2868), 669 states have call successors, (669), 130 states have call predecessors, (669), 150 states have return successors, (716), 634 states have call predecessors, (716), 664 states have call successors, (716) [2023-12-02 16:44:04,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 4253 transitions. [2023-12-02 16:44:04,147 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 4253 transitions. Word has length 88 [2023-12-02 16:44:04,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:44:04,148 INFO L495 AbstractCegarLoop]: Abstraction has 2635 states and 4253 transitions. [2023-12-02 16:44:04,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2023-12-02 16:44:04,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 4253 transitions. [2023-12-02 16:44:04,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-02 16:44:04,152 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:44:04,152 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:44:04,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 16:44:04,153 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:44:04,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:44:04,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1149743116, now seen corresponding path program 1 times [2023-12-02 16:44:04,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:44:04,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147638507] [2023-12-02 16:44:04,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:44:04,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:44:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:44:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:44:04,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:44:04,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147638507] [2023-12-02 16:44:04,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147638507] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:44:04,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:44:04,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:44:04,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894887777] [2023-12-02 16:44:04,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:44:04,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:44:04,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:44:04,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:44:04,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:44:04,441 INFO L87 Difference]: Start difference. First operand 2635 states and 4253 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-02 16:44:05,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:44:05,192 INFO L93 Difference]: Finished difference Result 2736 states and 4419 transitions. [2023-12-02 16:44:05,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:44:05,193 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 92 [2023-12-02 16:44:05,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:44:05,214 INFO L225 Difference]: With dead ends: 2736 [2023-12-02 16:44:05,214 INFO L226 Difference]: Without dead ends: 2721 [2023-12-02 16:44:05,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:44:05,217 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 690 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1841 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:44:05,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1841 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 16:44:05,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2023-12-02 16:44:05,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2641. [2023-12-02 16:44:05,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2641 states, 1821 states have (on average 1.5782537067545306) internal successors, (2874), 1920 states have internal predecessors, (2874), 669 states have call successors, (669), 130 states have call predecessors, (669), 150 states have return successors, (716), 634 states have call predecessors, (716), 664 states have call successors, (716) [2023-12-02 16:44:05,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 4259 transitions. [2023-12-02 16:44:05,434 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 4259 transitions. Word has length 92 [2023-12-02 16:44:05,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:44:05,435 INFO L495 AbstractCegarLoop]: Abstraction has 2641 states and 4259 transitions. [2023-12-02 16:44:05,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-02 16:44:05,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 4259 transitions. [2023-12-02 16:44:05,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-12-02 16:44:05,439 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:44:05,439 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:44:05,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 16:44:05,439 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:44:05,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:44:05,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1785537891, now seen corresponding path program 1 times [2023-12-02 16:44:05,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:44:05,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997332356] [2023-12-02 16:44:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:44:05,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:44:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:44:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:44:05,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:44:05,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997332356] [2023-12-02 16:44:05,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997332356] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:44:05,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:44:05,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-12-02 16:44:05,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909378416] [2023-12-02 16:44:05,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:44:05,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 16:44:05,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:44:05,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 16:44:05,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-12-02 16:44:05,908 INFO L87 Difference]: Start difference. First operand 2641 states and 4259 transitions. Second operand has 13 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2023-12-02 16:44:10,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:44:10,647 INFO L93 Difference]: Finished difference Result 3066 states and 4901 transitions. [2023-12-02 16:44:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-02 16:44:10,648 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 97 [2023-12-02 16:44:10,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:44:10,671 INFO L225 Difference]: With dead ends: 3066 [2023-12-02 16:44:10,671 INFO L226 Difference]: Without dead ends: 3049 [2023-12-02 16:44:10,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2023-12-02 16:44:10,675 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 2661 mSDsluCounter, 3382 mSDsCounter, 0 mSdLazyCounter, 7896 mSolverCounterSat, 1466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2687 SdHoareTripleChecker+Valid, 3928 SdHoareTripleChecker+Invalid, 9362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1466 IncrementalHoareTripleChecker+Valid, 7896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:44:10,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2687 Valid, 3928 Invalid, 9362 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1466 Valid, 7896 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-12-02 16:44:10,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2023-12-02 16:44:10,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2829. [2023-12-02 16:44:10,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2829 states, 1963 states have (on average 1.577687213448803) internal successors, (3097), 2060 states have internal predecessors, (3097), 686 states have call successors, (686), 160 states have call predecessors, (686), 179 states have return successors, (737), 652 states have call predecessors, (737), 681 states have call successors, (737) [2023-12-02 16:44:10,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2829 states to 2829 states and 4520 transitions. [2023-12-02 16:44:10,939 INFO L78 Accepts]: Start accepts. Automaton has 2829 states and 4520 transitions. Word has length 97 [2023-12-02 16:44:10,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:44:10,940 INFO L495 AbstractCegarLoop]: Abstraction has 2829 states and 4520 transitions. [2023-12-02 16:44:10,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2023-12-02 16:44:10,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2829 states and 4520 transitions. [2023-12-02 16:44:10,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-12-02 16:44:10,944 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:44:10,944 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:44:10,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 16:44:10,945 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:44:10,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:44:10,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1828712161, now seen corresponding path program 1 times [2023-12-02 16:44:10,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:44:10,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175626183] [2023-12-02 16:44:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:44:10,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:44:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:44:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 16:44:11,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:44:11,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175626183] [2023-12-02 16:44:11,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175626183] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:44:11,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:44:11,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:44:11,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633082357] [2023-12-02 16:44:11,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:44:11,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:44:11,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:44:11,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:44:11,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:44:11,196 INFO L87 Difference]: Start difference. First operand 2829 states and 4520 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-02 16:44:12,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:44:12,564 INFO L93 Difference]: Finished difference Result 7632 states and 12344 transitions. [2023-12-02 16:44:12,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:44:12,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 104 [2023-12-02 16:44:12,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:44:12,586 INFO L225 Difference]: With dead ends: 7632 [2023-12-02 16:44:12,586 INFO L226 Difference]: Without dead ends: 4823 [2023-12-02 16:44:12,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 16:44:12,598 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 1168 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:44:12,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1240 Valid, 702 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 16:44:12,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4823 states. [2023-12-02 16:44:12,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4823 to 4448. [2023-12-02 16:44:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4448 states, 3093 states have (on average 1.5716133204009053) internal successors, (4861), 3254 states have internal predecessors, (4861), 1068 states have call successors, (1068), 241 states have call predecessors, (1068), 286 states have return successors, (1199), 1012 states have call predecessors, (1199), 1063 states have call successors, (1199) [2023-12-02 16:44:13,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4448 states to 4448 states and 7128 transitions. [2023-12-02 16:44:13,026 INFO L78 Accepts]: Start accepts. Automaton has 4448 states and 7128 transitions. Word has length 104 [2023-12-02 16:44:13,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:44:13,027 INFO L495 AbstractCegarLoop]: Abstraction has 4448 states and 7128 transitions. [2023-12-02 16:44:13,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-02 16:44:13,027 INFO L276 IsEmpty]: Start isEmpty. Operand 4448 states and 7128 transitions. [2023-12-02 16:44:13,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-12-02 16:44:13,032 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:44:13,032 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:44:13,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 16:44:13,032 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:44:13,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:44:13,033 INFO L85 PathProgramCache]: Analyzing trace with hash -855783061, now seen corresponding path program 1 times [2023-12-02 16:44:13,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:44:13,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918659111] [2023-12-02 16:44:13,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:44:13,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:44:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:44:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 16:44:13,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:44:13,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918659111] [2023-12-02 16:44:13,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918659111] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:44:13,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:44:13,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:44:13,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030652477] [2023-12-02 16:44:13,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:44:13,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:44:13,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:44:13,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:44:13,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:44:13,261 INFO L87 Difference]: Start difference. First operand 4448 states and 7128 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-02 16:44:15,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:44:15,064 INFO L93 Difference]: Finished difference Result 12382 states and 20190 transitions. [2023-12-02 16:44:15,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:44:15,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 105 [2023-12-02 16:44:15,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:44:15,118 INFO L225 Difference]: With dead ends: 12382 [2023-12-02 16:44:15,118 INFO L226 Difference]: Without dead ends: 7957 [2023-12-02 16:44:15,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 16:44:15,144 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 1155 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1226 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:44:15,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1226 Valid, 715 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 16:44:15,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7957 states. [2023-12-02 16:44:15,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7957 to 7495. [2023-12-02 16:44:15,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7495 states, 5225 states have (on average 1.569377990430622) internal successors, (8200), 5527 states have internal predecessors, (8200), 1770 states have call successors, (1770), 403 states have call predecessors, (1770), 499 states have return successors, (2121), 1664 states have call predecessors, (2121), 1765 states have call successors, (2121) [2023-12-02 16:44:15,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7495 states to 7495 states and 12091 transitions. [2023-12-02 16:44:15,815 INFO L78 Accepts]: Start accepts. Automaton has 7495 states and 12091 transitions. Word has length 105 [2023-12-02 16:44:15,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:44:15,816 INFO L495 AbstractCegarLoop]: Abstraction has 7495 states and 12091 transitions. [2023-12-02 16:44:15,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-02 16:44:15,816 INFO L276 IsEmpty]: Start isEmpty. Operand 7495 states and 12091 transitions. [2023-12-02 16:44:15,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-12-02 16:44:15,821 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:44:15,821 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:44:15,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 16:44:15,822 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:44:15,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:44:15,822 INFO L85 PathProgramCache]: Analyzing trace with hash -759748127, now seen corresponding path program 1 times [2023-12-02 16:44:15,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:44:15,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972279151] [2023-12-02 16:44:15,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:44:15,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:44:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:44:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 16:44:16,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:44:16,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972279151] [2023-12-02 16:44:16,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972279151] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:44:16,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:44:16,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:44:16,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213792490] [2023-12-02 16:44:16,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:44:16,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:44:16,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:44:16,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:44:16,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:44:16,060 INFO L87 Difference]: Start difference. First operand 7495 states and 12091 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, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-02 16:44:18,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:44:18,082 INFO L93 Difference]: Finished difference Result 21659 states and 35934 transitions. [2023-12-02 16:44:18,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:44:18,083 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, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 106 [2023-12-02 16:44:18,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:44:18,132 INFO L225 Difference]: With dead ends: 21659 [2023-12-02 16:44:18,132 INFO L226 Difference]: Without dead ends: 14193 [2023-12-02 16:44:18,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 16:44:18,162 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 1142 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:44:18,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1212 Valid, 728 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 16:44:18,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14193 states. [2023-12-02 16:44:19,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14193 to 13528. [2023-12-02 16:44:19,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13528 states, 9436 states have (on average 1.5652818991097923) internal successors, (14770), 10034 states have internal predecessors, (14770), 3152 states have call successors, (3152), 727 states have call predecessors, (3152), 939 states have return successors, (4195), 2946 states have call predecessors, (4195), 3147 states have call successors, (4195) [2023-12-02 16:44:19,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13528 states to 13528 states and 22117 transitions. [2023-12-02 16:44:19,252 INFO L78 Accepts]: Start accepts. Automaton has 13528 states and 22117 transitions. Word has length 106 [2023-12-02 16:44:19,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:44:19,253 INFO L495 AbstractCegarLoop]: Abstraction has 13528 states and 22117 transitions. [2023-12-02 16:44:19,253 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, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-02 16:44:19,253 INFO L276 IsEmpty]: Start isEmpty. Operand 13528 states and 22117 transitions. [2023-12-02 16:44:19,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-12-02 16:44:19,257 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:44:19,257 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:44:19,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 16:44:19,257 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:44:19,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:44:19,258 INFO L85 PathProgramCache]: Analyzing trace with hash -2077628563, now seen corresponding path program 1 times [2023-12-02 16:44:19,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:44:19,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040393420] [2023-12-02 16:44:19,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:44:19,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:44:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:44:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 16:44:19,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:44:19,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040393420] [2023-12-02 16:44:19,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040393420] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:44:19,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:44:19,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:44:19,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691226856] [2023-12-02 16:44:19,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:44:19,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:44:19,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:44:19,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:44:19,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:44:19,535 INFO L87 Difference]: Start difference. First operand 13528 states and 22117 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-02 16:44:22,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:44:22,401 INFO L93 Difference]: Finished difference Result 40040 states and 68589 transitions. [2023-12-02 16:44:22,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:44:22,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 107 [2023-12-02 16:44:22,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:44:22,529 INFO L225 Difference]: With dead ends: 40040 [2023-12-02 16:44:22,529 INFO L226 Difference]: Without dead ends: 26553 [2023-12-02 16:44:22,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 16:44:22,578 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 1129 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1198 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:44:22,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1198 Valid, 738 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 16:44:22,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26553 states. [2023-12-02 16:44:24,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26553 to 25453. [2023-12-02 16:44:24,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25453 states, 17739 states have (on average 1.5597271548565308) internal successors, (27668), 18957 states have internal predecessors, (27668), 5866 states have call successors, (5866), 1375 states have call predecessors, (5866), 1847 states have return successors, (9145), 5460 states have call predecessors, (9145), 5861 states have call successors, (9145) [2023-12-02 16:44:24,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25453 states to 25453 states and 42679 transitions. [2023-12-02 16:44:24,498 INFO L78 Accepts]: Start accepts. Automaton has 25453 states and 42679 transitions. Word has length 107 [2023-12-02 16:44:24,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:44:24,499 INFO L495 AbstractCegarLoop]: Abstraction has 25453 states and 42679 transitions. [2023-12-02 16:44:24,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-02 16:44:24,500 INFO L276 IsEmpty]: Start isEmpty. Operand 25453 states and 42679 transitions. [2023-12-02 16:44:24,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-02 16:44:24,503 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:44:24,503 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:44:24,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 16:44:24,503 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:44:24,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:44:24,504 INFO L85 PathProgramCache]: Analyzing trace with hash 17754787, now seen corresponding path program 1 times [2023-12-02 16:44:24,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:44:24,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353367682] [2023-12-02 16:44:24,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:44:24,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:44:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:44:24,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 16:44:24,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:44:24,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353367682] [2023-12-02 16:44:24,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353367682] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:44:24,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:44:24,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:44:24,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408979866] [2023-12-02 16:44:24,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:44:24,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:44:24,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:44:24,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:44:24,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:44:24,804 INFO L87 Difference]: Start difference. First operand 25453 states and 42679 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-02 16:44:29,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:44:29,579 INFO L93 Difference]: Finished difference Result 76578 states and 138763 transitions. [2023-12-02 16:44:29,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:44:29,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 108 [2023-12-02 16:44:29,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:44:29,838 INFO L225 Difference]: With dead ends: 76578 [2023-12-02 16:44:29,838 INFO L226 Difference]: Without dead ends: 51180 [2023-12-02 16:44:29,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 16:44:29,918 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 1139 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:44:29,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1207 Valid, 732 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 16:44:29,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51180 states. [2023-12-02 16:44:34,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51180 to 48821. [2023-12-02 16:44:34,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48821 states, 34042 states have (on average 1.5571059279713295) internal successors, (53007), 36446 states have internal predecessors, (53007), 11180 states have call successors, (11180), 2661 states have call predecessors, (11180), 3598 states have return successors, (20783), 10373 states have call predecessors, (20783), 11175 states have call successors, (20783) [2023-12-02 16:44:34,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48821 states to 48821 states and 84970 transitions. [2023-12-02 16:44:34,356 INFO L78 Accepts]: Start accepts. Automaton has 48821 states and 84970 transitions. Word has length 108 [2023-12-02 16:44:34,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:44:34,357 INFO L495 AbstractCegarLoop]: Abstraction has 48821 states and 84970 transitions. [2023-12-02 16:44:34,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-12-02 16:44:34,357 INFO L276 IsEmpty]: Start isEmpty. Operand 48821 states and 84970 transitions. [2023-12-02 16:44:34,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-12-02 16:44:34,366 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:44:34,366 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:44:34,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 16:44:34,367 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:44:34,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:44:34,367 INFO L85 PathProgramCache]: Analyzing trace with hash 100942418, now seen corresponding path program 1 times [2023-12-02 16:44:34,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:44:34,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49812729] [2023-12-02 16:44:34,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:44:34,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:44:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:44:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-02 16:44:34,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:44:34,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49812729] [2023-12-02 16:44:34,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49812729] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:44:34,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:44:34,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:44:34,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015472200] [2023-12-02 16:44:34,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:44:34,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:44:34,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:44:34,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:44:34,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:44:34,623 INFO L87 Difference]: Start difference. First operand 48821 states and 84970 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-12-02 16:44:38,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:44:38,741 INFO L93 Difference]: Finished difference Result 99308 states and 178942 transitions. [2023-12-02 16:44:38,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:44:38,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 156 [2023-12-02 16:44:38,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:44:38,932 INFO L225 Difference]: With dead ends: 99308 [2023-12-02 16:44:38,933 INFO L226 Difference]: Without dead ends: 50504 [2023-12-02 16:44:39,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:44:39,052 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 30 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:44:39,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1665 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:44:39,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50504 states. [2023-12-02 16:44:43,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50504 to 49019. [2023-12-02 16:44:43,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49019 states, 34240 states have (on average 1.5538843457943925) internal successors, (53205), 36644 states have internal predecessors, (53205), 11180 states have call successors, (11180), 2661 states have call predecessors, (11180), 3598 states have return successors, (20783), 10373 states have call predecessors, (20783), 11175 states have call successors, (20783) [2023-12-02 16:44:43,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49019 states to 49019 states and 85168 transitions. [2023-12-02 16:44:43,765 INFO L78 Accepts]: Start accepts. Automaton has 49019 states and 85168 transitions. Word has length 156 [2023-12-02 16:44:43,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:44:43,766 INFO L495 AbstractCegarLoop]: Abstraction has 49019 states and 85168 transitions. [2023-12-02 16:44:43,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-12-02 16:44:43,766 INFO L276 IsEmpty]: Start isEmpty. Operand 49019 states and 85168 transitions. [2023-12-02 16:44:43,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-12-02 16:44:43,774 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:44:43,775 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:44:43,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 16:44:43,775 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:44:43,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:44:43,775 INFO L85 PathProgramCache]: Analyzing trace with hash 906815945, now seen corresponding path program 1 times [2023-12-02 16:44:43,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:44:43,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874373125] [2023-12-02 16:44:43,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:44:43,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:44:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:44:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-12-02 16:44:44,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:44:44,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874373125] [2023-12-02 16:44:44,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874373125] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:44:44,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688777835] [2023-12-02 16:44:44,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:44:44,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:44:44,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:44:44,340 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:44:44,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:44:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:44:44,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 2084 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:44:44,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:44:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-02 16:44:44,807 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:44:44,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688777835] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:44:44,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:44:44,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2023-12-02 16:44:44,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349620076] [2023-12-02 16:44:44,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:44:44,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:44:44,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:44:44,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:44:44,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-12-02 16:44:44,811 INFO L87 Difference]: Start difference. First operand 49019 states and 85168 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-12-02 16:44:48,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:44:48,460 INFO L93 Difference]: Finished difference Result 101882 states and 184915 transitions. [2023-12-02 16:44:48,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:44:48,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 159 [2023-12-02 16:44:48,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:44:48,683 INFO L225 Difference]: With dead ends: 101882 [2023-12-02 16:44:48,683 INFO L226 Difference]: Without dead ends: 52880 [2023-12-02 16:44:48,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-12-02 16:44:48,814 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 213 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:44:48,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1461 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:44:48,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52880 states. [2023-12-02 16:44:52,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52880 to 52880. [2023-12-02 16:44:52,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52880 states, 38002 states have (on average 1.5902320930477343) internal successors, (60432), 40406 states have internal predecessors, (60432), 11180 states have call successors, (11180), 2760 states have call predecessors, (11180), 3697 states have return successors, (20783), 10373 states have call predecessors, (20783), 11175 states have call successors, (20783) [2023-12-02 16:44:52,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52880 states to 52880 states and 92395 transitions. [2023-12-02 16:44:52,774 INFO L78 Accepts]: Start accepts. Automaton has 52880 states and 92395 transitions. Word has length 159 [2023-12-02 16:44:52,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:44:52,774 INFO L495 AbstractCegarLoop]: Abstraction has 52880 states and 92395 transitions. [2023-12-02 16:44:52,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-12-02 16:44:52,775 INFO L276 IsEmpty]: Start isEmpty. Operand 52880 states and 92395 transitions. [2023-12-02 16:44:52,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-12-02 16:44:52,785 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:44:52,785 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:44:52,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:44:52,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 16:44:52,986 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:44:52,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:44:52,986 INFO L85 PathProgramCache]: Analyzing trace with hash -2115699882, now seen corresponding path program 1 times [2023-12-02 16:44:52,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:44:52,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394096170] [2023-12-02 16:44:52,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:44:52,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:44:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:44:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-12-02 16:44:53,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:44:53,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394096170] [2023-12-02 16:44:53,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394096170] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:44:53,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849527047] [2023-12-02 16:44:53,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:44:53,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:44:53,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:44:53,138 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:44:53,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:44:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:44:53,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 2089 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:44:53,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:44:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 16:44:53,524 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:44:53,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849527047] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:44:53,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:44:53,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-12-02 16:44:53,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977929036] [2023-12-02 16:44:53,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:44:53,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:44:53,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:44:53,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:44:53,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:44:53,527 INFO L87 Difference]: Start difference. First operand 52880 states and 92395 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-12-02 16:44:57,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:44:57,652 INFO L93 Difference]: Finished difference Result 109604 states and 199105 transitions. [2023-12-02 16:44:57,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:44:57,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 164 [2023-12-02 16:44:57,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:44:57,830 INFO L225 Difference]: With dead ends: 109604 [2023-12-02 16:44:57,830 INFO L226 Difference]: Without dead ends: 56741 [2023-12-02 16:44:57,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:44:57,940 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 211 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:44:57,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1461 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:44:57,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56741 states. [2023-12-02 16:45:01,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56741 to 56741. [2023-12-02 16:45:01,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56741 states, 41764 states have (on average 1.6200316061679916) internal successors, (67659), 44168 states have internal predecessors, (67659), 11180 states have call successors, (11180), 2859 states have call predecessors, (11180), 3796 states have return successors, (20783), 10373 states have call predecessors, (20783), 11175 states have call successors, (20783) [2023-12-02 16:45:01,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56741 states to 56741 states and 99622 transitions. [2023-12-02 16:45:01,918 INFO L78 Accepts]: Start accepts. Automaton has 56741 states and 99622 transitions. Word has length 164 [2023-12-02 16:45:01,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:45:01,919 INFO L495 AbstractCegarLoop]: Abstraction has 56741 states and 99622 transitions. [2023-12-02 16:45:01,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-12-02 16:45:01,919 INFO L276 IsEmpty]: Start isEmpty. Operand 56741 states and 99622 transitions. [2023-12-02 16:45:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-12-02 16:45:01,925 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:45:01,925 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:45:01,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 16:45:02,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 16:45:02,126 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:45:02,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:45:02,126 INFO L85 PathProgramCache]: Analyzing trace with hash -646398742, now seen corresponding path program 1 times [2023-12-02 16:45:02,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:45:02,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781331150] [2023-12-02 16:45:02,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:45:02,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:45:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:45:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-12-02 16:45:03,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:45:03,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781331150] [2023-12-02 16:45:03,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781331150] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:45:03,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498226481] [2023-12-02 16:45:03,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:45:03,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:45:03,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:45:03,703 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:45:03,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:45:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:45:04,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 2093 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:45:04,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:45:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 16:45:04,158 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:45:04,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498226481] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:45:04,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:45:04,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2023-12-02 16:45:04,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267045144] [2023-12-02 16:45:04,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:45:04,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:45:04,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:45:04,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:45:04,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2023-12-02 16:45:04,161 INFO L87 Difference]: Start difference. First operand 56741 states and 99622 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-12-02 16:45:07,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:45:07,908 INFO L93 Difference]: Finished difference Result 117326 states and 213295 transitions. [2023-12-02 16:45:07,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:45:07,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 168 [2023-12-02 16:45:07,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:45:08,209 INFO L225 Difference]: With dead ends: 117326 [2023-12-02 16:45:08,209 INFO L226 Difference]: Without dead ends: 60602 [2023-12-02 16:45:08,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2023-12-02 16:45:08,369 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 209 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:45:08,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1461 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:45:08,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60602 states. [2023-12-02 16:45:12,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60602 to 60602. [2023-12-02 16:45:12,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60602 states, 45526 states have (on average 1.6449062074419014) internal successors, (74886), 47930 states have internal predecessors, (74886), 11180 states have call successors, (11180), 2958 states have call predecessors, (11180), 3895 states have return successors, (20783), 10373 states have call predecessors, (20783), 11175 states have call successors, (20783) [2023-12-02 16:45:12,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60602 states to 60602 states and 106849 transitions. [2023-12-02 16:45:12,564 INFO L78 Accepts]: Start accepts. Automaton has 60602 states and 106849 transitions. Word has length 168 [2023-12-02 16:45:12,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:45:12,565 INFO L495 AbstractCegarLoop]: Abstraction has 60602 states and 106849 transitions. [2023-12-02 16:45:12,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-12-02 16:45:12,565 INFO L276 IsEmpty]: Start isEmpty. Operand 60602 states and 106849 transitions. [2023-12-02 16:45:12,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-12-02 16:45:12,572 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:45:12,572 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:45:12,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 16:45:12,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 16:45:12,773 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:45:12,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:45:12,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1086694021, now seen corresponding path program 1 times [2023-12-02 16:45:12,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:45:12,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157894397] [2023-12-02 16:45:12,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:45:12,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:45:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:45:14,288 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-02 16:45:14,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:45:14,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157894397] [2023-12-02 16:45:14,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157894397] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:45:14,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381873231] [2023-12-02 16:45:14,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:45:14,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:45:14,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:45:14,290 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:45:14,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:45:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:45:14,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 2096 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:45:14,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:45:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 16:45:14,698 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:45:14,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381873231] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:45:14,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:45:14,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2023-12-02 16:45:14,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156237005] [2023-12-02 16:45:14,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:45:14,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:45:14,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:45:14,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:45:14,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2023-12-02 16:45:14,700 INFO L87 Difference]: Start difference. First operand 60602 states and 106849 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-12-02 16:45:18,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:45:18,295 INFO L93 Difference]: Finished difference Result 125048 states and 227485 transitions. [2023-12-02 16:45:18,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:45:18,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 171 [2023-12-02 16:45:18,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:45:18,491 INFO L225 Difference]: With dead ends: 125048 [2023-12-02 16:45:18,491 INFO L226 Difference]: Without dead ends: 64463 [2023-12-02 16:45:18,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2023-12-02 16:45:18,599 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 207 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:45:18,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1461 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:45:18,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64463 states. [2023-12-02 16:45:22,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64463 to 64463. [2023-12-02 16:45:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64463 states, 49288 states have (on average 1.665983606557377) internal successors, (82113), 51692 states have internal predecessors, (82113), 11180 states have call successors, (11180), 3057 states have call predecessors, (11180), 3994 states have return successors, (20783), 10373 states have call predecessors, (20783), 11175 states have call successors, (20783) [2023-12-02 16:45:23,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64463 states to 64463 states and 114076 transitions. [2023-12-02 16:45:23,046 INFO L78 Accepts]: Start accepts. Automaton has 64463 states and 114076 transitions. Word has length 171 [2023-12-02 16:45:23,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:45:23,046 INFO L495 AbstractCegarLoop]: Abstraction has 64463 states and 114076 transitions. [2023-12-02 16:45:23,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-12-02 16:45:23,047 INFO L276 IsEmpty]: Start isEmpty. Operand 64463 states and 114076 transitions. [2023-12-02 16:45:23,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-12-02 16:45:23,054 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:45:23,054 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:45:23,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 16:45:23,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 16:45:23,255 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:45:23,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:45:23,255 INFO L85 PathProgramCache]: Analyzing trace with hash 793091091, now seen corresponding path program 1 times [2023-12-02 16:45:23,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:45:23,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967947870] [2023-12-02 16:45:23,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:45:23,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:45:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:45:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-12-02 16:45:24,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:45:24,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967947870] [2023-12-02 16:45:24,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967947870] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:45:24,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191294124] [2023-12-02 16:45:24,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:45:24,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:45:24,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:45:24,623 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:45:24,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 16:45:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:45:24,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 2092 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:45:24,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:45:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-12-02 16:45:24,997 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:45:24,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191294124] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:45:24,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:45:24,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2023-12-02 16:45:24,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690093767] [2023-12-02 16:45:24,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:45:24,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:45:24,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:45:24,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:45:25,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2023-12-02 16:45:25,000 INFO L87 Difference]: Start difference. First operand 64463 states and 114076 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2023-12-02 16:45:28,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:45:28,859 INFO L93 Difference]: Finished difference Result 66894 states and 126557 transitions. [2023-12-02 16:45:28,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:45:28,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) Word has length 173 [2023-12-02 16:45:28,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:45:29,099 INFO L225 Difference]: With dead ends: 66894 [2023-12-02 16:45:29,099 INFO L226 Difference]: Without dead ends: 66737 [2023-12-02 16:45:29,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2023-12-02 16:45:29,126 INFO L413 NwaCegarLoop]: 595 mSDtfsCounter, 47 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1736 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:45:29,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1736 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:45:29,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66737 states. [2023-12-02 16:45:33,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66737 to 64711. [2023-12-02 16:45:33,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64711 states, 49536 states have (on average 1.6626493863049097) internal successors, (82361), 51940 states have internal predecessors, (82361), 11180 states have call successors, (11180), 3057 states have call predecessors, (11180), 3994 states have return successors, (20783), 10373 states have call predecessors, (20783), 11175 states have call successors, (20783) [2023-12-02 16:45:33,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64711 states to 64711 states and 114324 transitions. [2023-12-02 16:45:33,625 INFO L78 Accepts]: Start accepts. Automaton has 64711 states and 114324 transitions. Word has length 173 [2023-12-02 16:45:33,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:45:33,625 INFO L495 AbstractCegarLoop]: Abstraction has 64711 states and 114324 transitions. [2023-12-02 16:45:33,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 1 states have call successors, (27) [2023-12-02 16:45:33,626 INFO L276 IsEmpty]: Start isEmpty. Operand 64711 states and 114324 transitions. [2023-12-02 16:45:33,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2023-12-02 16:45:33,638 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:45:33,638 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-12-02 16:45:33,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 16:45:33,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 16:45:33,839 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:45:33,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:45:33,839 INFO L85 PathProgramCache]: Analyzing trace with hash -863281384, now seen corresponding path program 1 times [2023-12-02 16:45:33,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:45:33,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577913967] [2023-12-02 16:45:33,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:45:33,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:45:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:45:34,242 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 12 proven. 89 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2023-12-02 16:45:34,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:45:34,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577913967] [2023-12-02 16:45:34,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577913967] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:45:34,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808127797] [2023-12-02 16:45:34,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:45:34,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:45:34,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:45:34,243 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:45:34,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 16:45:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:45:34,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 2861 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:45:34,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:45:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-12-02 16:45:35,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:45:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-12-02 16:45:35,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808127797] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:45:35,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1600921448] [2023-12-02 16:45:35,415 INFO L159 IcfgInterpreter]: Started Sifa with 139 locations of interest [2023-12-02 16:45:35,415 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:45:35,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:45:35,422 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:45:35,423 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:46:08,704 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 416 for LOIs [2023-12-02 16:46:08,931 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 594 for LOIs [2023-12-02 16:47:12,470 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 635 for LOIs [2023-12-02 16:47:22,355 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 192 for LOIs [2023-12-02 16:48:13,217 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 30 for LOIs [2023-12-02 16:48:13,565 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 323 for LOIs [2023-12-02 16:48:24,712 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 30 for LOIs [2023-12-02 16:48:24,954 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 32 for LOIs [2023-12-02 16:48:24,976 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 636 for LOIs [2023-12-02 16:48:26,810 INFO L197 IcfgInterpreter]: Interpreting procedure enterElevator with input of size 216 for LOIs [2023-12-02 16:48:30,337 INFO L197 IcfgInterpreter]: Interpreting procedure pressInLiftFloorButton with input of size 243 for LOIs [2023-12-02 16:48:30,943 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 22 for LOIs [2023-12-02 16:48:30,945 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 585 for LOIs [2023-12-02 16:48:43,405 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 589 for LOIs [2023-12-02 16:48:46,332 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 491 for LOIs [2023-12-02 16:48:47,434 INFO L197 IcfgInterpreter]: Interpreting procedure getWeight with input of size 202 for LOIs [2023-12-02 16:48:47,890 INFO L197 IcfgInterpreter]: Interpreting procedure getDestination with input of size 223 for LOIs [2023-12-02 16:48:48,435 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 517 for LOIs [2023-12-02 16:48:48,918 INFO L197 IcfgInterpreter]: Interpreting procedure removePersonFromFloor with input of size 400 for LOIs [2023-12-02 16:48:59,115 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 434 for LOIs [2023-12-02 16:49:01,322 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:50:05,368 WARN L293 SmtUtils]: Spent 13.88s on a formula simplification. DAG size of input: 635 DAG size of output: 626 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:50:20,118 WARN L293 SmtUtils]: Spent 14.27s on a formula simplification. DAG size of input: 636 DAG size of output: 627 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:50:35,078 WARN L293 SmtUtils]: Spent 14.41s on a formula simplification. DAG size of input: 641 DAG size of output: 632 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:52:03,426 WARN L293 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 488 DAG size of output: 488 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:52:10,202 WARN L293 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 493 DAG size of output: 493 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:52:17,004 WARN L293 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 495 DAG size of output: 495 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:52:23,817 WARN L293 SmtUtils]: Spent 5.52s on a formula simplification. DAG size of input: 491 DAG size of output: 491 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:52:31,048 WARN L293 SmtUtils]: Spent 6.00s on a formula simplification. DAG size of input: 496 DAG size of output: 496 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:52:37,785 WARN L293 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 497 DAG size of output: 497 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:52:44,678 WARN L293 SmtUtils]: Spent 5.86s on a formula simplification. DAG size of input: 500 DAG size of output: 497 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:52:51,638 WARN L293 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 502 DAG size of output: 497 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:52:58,704 WARN L293 SmtUtils]: Spent 6.03s on a formula simplification. DAG size of input: 508 DAG size of output: 500 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:53:05,895 WARN L293 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 511 DAG size of output: 503 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:53:49,339 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1583246#(and (= (select (select |#memory_int| 23) 0) 32) (= (select |#length| 32) 30) (= 6 (select |#length| 18)) (= 116 (select (select |#memory_int| 7) 2)) (= (select |#valid| 30) 1) (= (select (select |#memory_int| 20) 1) 37) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select |#valid| 15) 1) (= ~executiveFloor~0 4) (= (select |#length| 21) 4) (= (select (select |#memory_int| 21) 1) 37) (<= 0 (+ ~currentFloorID~0 2147483648)) (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_int| 23) 1) 37) (= (select (select |#memory_int| 20) 3) 0) (= (select (select |#memory_int| 22) 3) 0) (= (select (select |#memory_int| 5) 3) 0) (= 4 (select |#length| 16)) (= 3 (select |#length| 10)) (= (select |#length| 37) 25) (= (select (select |#memory_int| 22) 0) 32) (= (select (select |#memory_int| 13) 3) 0) (= (select |#valid| 26) 1) (= (select |#length| 4) 10) (= 9 (select |#length| 30)) (= (select |#length| 8) 3) (= (select |#length| 6) 4) (= (select (select |#memory_int| 13) 1) 37) (= (select |#valid| 35) 1) (= (select |#valid| 9) 1) (= (select (select |#memory_int| 18) 5) 0) (= (select (select |#memory_int| 20) 0) 32) (= 25 (select |#length| 34)) (= (select (select |#memory_int| 6) 0) 91) (= (select |#valid| 11) 1) (= (select |#length| 9) 10) (= (select |#valid| 27) 1) (= 9 (select |#length| 36)) (= (select (select |#memory_int| 8) 0) 37) (= (select |#valid| 33) 1) (= 73 (select (select |#memory_int| 12) 1)) (= (select (select |#memory_int| 22) 1) 37) (<= ~currentFloorID~0 2147483647) (= (select (select |#memory_int| 23) 2) 105) (= (select (select |#memory_int| 10) 0) 117) (= (select (select |#memory_int| 19) 2) 105) (= 9 (select |#length| 25)) (= (select |#length| 15) 4) (= 31 (select |#length| 2)) (= (select (select |#memory_int| 19) 1) 37) (= ~head~0.offset 0) (= 7 (select |#length| 12)) (= (select (select |#memory_int| 22) 2) 105) (= 2 (select |#length| 1)) (= (select (select |#memory_int| 16) 2) 105) (= (select (select |#memory_int| 17) 2) 105) (= (select |#length| 19) 4) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= (select (select |#memory_int| 18) 4) 58) (= (select |#valid| 18) 1) (= 91 (select (select |#memory_int| 5) 0)) (= (select |#valid| 22) 1) (= 30 (select |#length| 26)) (= 70 (select (select |#memory_int| 18) 1)) (= 5 (select |#length| 7)) (= (select |#valid| 24) 1) (= (select (select |#memory_int| 19) 3) 0) (= 32 (select (select |#memory_int| 7) 0)) (= (select (select |#memory_int| 17) 3) 0) (= (select (select |#memory_int| 5) 1) 95) (= (select |#valid| 12) 1) (= (select |#valid| 32) 1) (= (select |#valid| 28) 1) (= (select |#length| 17) 4) (= (select |#valid| 37) 1) (= (select (select |#memory_int| 13) 2) 105) (= 112 (select (select |#memory_int| 12) 4)) (= (select |#valid| 4) 1) (= (select (select |#memory_int| 16) 1) 37) (= (select (select |#memory_int| 20) 2) 105) (= 112 (select (select |#memory_int| 10) 1)) (= (select (select |#memory_int| 8) 2) 0) (= (select (select |#memory_int| 21) 2) 105) (= 0 (select (select |#memory_int| 7) 4)) (= (select |#length| 13) 4) (= 5 (select |#length| 11)) (not (= 0 ~floorButtons_spc2_0~0)) (= (select (select |#memory_int| 17) 1) 37) (= (select (select |#memory_int| 6) 1) 93) (= (select |#valid| 1) 1) (= (select |#valid| 20) 1) (= (select |#length| 24) 2) (= ~doorState~0 1) (= (select (select |#memory_int| 12) 6) 0) (= (select |#valid| 21) 1) (= (select (select |#memory_int| 11) 0) 100) (= (select (select |#memory_int| 24) 0) 10) (= 97 (select (select |#memory_int| 7) 1)) (= (select (select |#memory_int| 15) 1) 37) (= (select |#length| 5) 4) (= (select |#valid| 14) 1) (= 112 (select (select |#memory_int| 18) 3)) (= 119 (select (select |#memory_int| 11) 2)) (= (select |#valid| 0) 0) (= (select (select |#memory_int| 12) 5) 58) (= (select (select |#memory_int| 16) 0) 32) (= (select |#valid| 25) 1) (= ~head~0.base 0) (= (select (select |#memory_int| 14) 3) 0) (= (select (select |#memory_int| 23) 3) 0) (= 95 (select (select |#memory_int| 12) 3)) (= 105 (select (select |#memory_int| 14) 2)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 14) 1) 37) (= (select |#valid| 36) 1) (= (select (select |#memory_int| 10) 2) 0) (= (select |#length| 33) 9) (= (select |#length| 27) 9) (= (select (select |#memory_int| 1) 0) 48) (= ~blocked~0 0) (= (select (select |#memory_int| 11) 1) 111) (= (select |#valid| 23) 1) (= 32 (select (select |#memory_int| 7) 3)) (= 30 (select |#length| 35)) (= 4 (select |#length| 23)) (= (select (select |#memory_int| 24) 1) 0) (= (select |#length| 20) 4) (= (select (select |#memory_int| 21) 3) 0) (= 76 (select (select |#memory_int| 12) 2)) (= (select |#valid| 19) 1) (= (select (select |#memory_int| 15) 0) 32) (= 32 (select (select |#memory_int| 13) 0)) (= (select |#valid| 31) 1) (= (select |#valid| 34) 1) (= (select (select |#memory_int| 6) 3) 0) (= (select |#valid| 16) 1) (= (select (select |#memory_int| 15) 2) 105) (= 32 (select (select |#memory_int| 17) 0)) (= 21 (select |#length| 31)) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 15) 3) 0) (= (select (select |#memory_int| 1) 1) 0) (= (select (select |#memory_int| 5) 2) 93) (= (select |#length| 28) 21) (= (select (select |#memory_int| 14) 0) 32) (= (select |#valid| 29) 1) (= ~maximumWeight~0 100) (= (select (select |#memory_int| 6) 2) 32) (= 32 (select (select |#memory_int| 12) 0)) (= (select |#valid| 17) 1) (= (select (select |#memory_int| 16) 3) 0) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= (select (select |#memory_int| 11) 4) 0) (= 32 (select (select |#memory_int| 19) 0)) (= (select (select |#memory_int| 18) 2) 95) (= 4 (select |#length| 14)) (= 30 (select |#length| 29)) (= (select |#valid| 13) 1) (= ~cleanupTimeShifts~0 12) (= (select |#length| 22) 4) (= 32 (select (select |#memory_int| 18) 0)) (= (select (select |#memory_int| 8) 1) 105) (= (select (select |#memory_int| 11) 3) 110) (= 32 (select (select |#memory_int| 21) 0)))' at error location [2023-12-02 16:53:49,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:53:49,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:53:49,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 7] total 17 [2023-12-02 16:53:49,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653560649] [2023-12-02 16:53:49,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:53:49,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 16:53:49,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:53:49,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 16:53:49,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1031, Invalid=15481, Unknown=0, NotChecked=0, Total=16512 [2023-12-02 16:53:49,349 INFO L87 Difference]: Start difference. First operand 64711 states and 114324 transitions. Second operand has 17 states, 17 states have (on average 14.882352941176471) internal successors, (253), 17 states have internal predecessors, (253), 10 states have call successors, (75), 4 states have call predecessors, (75), 6 states have return successors, (74), 10 states have call predecessors, (74), 9 states have call successors, (74) [2023-12-02 16:54:01,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:54:01,665 INFO L93 Difference]: Finished difference Result 175074 states and 386591 transitions. [2023-12-02 16:54:01,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 16:54:01,666 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 14.882352941176471) internal successors, (253), 17 states have internal predecessors, (253), 10 states have call successors, (75), 4 states have call predecessors, (75), 6 states have return successors, (74), 10 states have call predecessors, (74), 9 states have call successors, (74) Word has length 292 [2023-12-02 16:54:01,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:54:02,271 INFO L225 Difference]: With dead ends: 175074 [2023-12-02 16:54:02,271 INFO L226 Difference]: Without dead ends: 105132 [2023-12-02 16:54:02,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 769 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9211 ImplicationChecksByTransitivity, 289.9s TimeCoverageRelationStatistics Valid=1392, Invalid=22478, Unknown=0, NotChecked=0, Total=23870 [2023-12-02 16:54:02,580 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 3669 mSDsluCounter, 2257 mSDsCounter, 0 mSdLazyCounter, 4949 mSolverCounterSat, 1715 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3684 SdHoareTripleChecker+Valid, 2664 SdHoareTripleChecker+Invalid, 6664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1715 IncrementalHoareTripleChecker+Valid, 4949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:54:02,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3684 Valid, 2664 Invalid, 6664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1715 Valid, 4949 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-12-02 16:54:02,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105132 states. [2023-12-02 16:54:11,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105132 to 93588. [2023-12-02 16:54:11,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93588 states, 70642 states have (on average 1.5760312561931995) internal successors, (111334), 73938 states have internal predecessors, (111334), 16973 states have call successors, (16973), 4546 states have call predecessors, (16973), 5972 states have return successors, (48461), 15778 states have call predecessors, (48461), 16968 states have call successors, (48461) [2023-12-02 16:54:12,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93588 states to 93588 states and 176768 transitions. [2023-12-02 16:54:12,120 INFO L78 Accepts]: Start accepts. Automaton has 93588 states and 176768 transitions. Word has length 292 [2023-12-02 16:54:12,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:54:12,121 INFO L495 AbstractCegarLoop]: Abstraction has 93588 states and 176768 transitions. [2023-12-02 16:54:12,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.882352941176471) internal successors, (253), 17 states have internal predecessors, (253), 10 states have call successors, (75), 4 states have call predecessors, (75), 6 states have return successors, (74), 10 states have call predecessors, (74), 9 states have call successors, (74) [2023-12-02 16:54:12,121 INFO L276 IsEmpty]: Start isEmpty. Operand 93588 states and 176768 transitions. [2023-12-02 16:54:12,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-12-02 16:54:12,143 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:54:12,143 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:54:12,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 16:54:12,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 16:54:12,344 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:54:12,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:54:12,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1071641207, now seen corresponding path program 1 times [2023-12-02 16:54:12,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:54:12,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956463616] [2023-12-02 16:54:12,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:54:12,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:54:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:54:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-12-02 16:54:14,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:54:14,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956463616] [2023-12-02 16:54:14,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956463616] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:54:14,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893938729] [2023-12-02 16:54:14,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:54:14,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:54:14,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:54:14,142 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:54:14,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 16:54:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:54:14,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 2162 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:54:14,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:54:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-12-02 16:54:14,500 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:54:14,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893938729] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:54:14,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:54:14,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2023-12-02 16:54:14,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338218543] [2023-12-02 16:54:14,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:54:14,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:54:14,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:54:14,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:54:14,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2023-12-02 16:54:14,502 INFO L87 Difference]: Start difference. First operand 93588 states and 176768 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2023-12-02 16:54:21,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:54:21,813 INFO L93 Difference]: Finished difference Result 192446 states and 382386 transitions. [2023-12-02 16:54:21,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:54:21,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 196 [2023-12-02 16:54:21,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:54:22,325 INFO L225 Difference]: With dead ends: 192446 [2023-12-02 16:54:22,325 INFO L226 Difference]: Without dead ends: 98901 [2023-12-02 16:54:22,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2023-12-02 16:54:22,736 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 205 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:54:22,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1461 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:54:22,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98901 states. [2023-12-02 16:54:31,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98901 to 98901. [2023-12-02 16:54:31,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98901 states, 75724 states have (on average 1.591410913316782) internal successors, (120508), 79086 states have internal predecessors, (120508), 16973 states have call successors, (16973), 4711 states have call predecessors, (16973), 6203 states have return successors, (48461), 15778 states have call predecessors, (48461), 16968 states have call successors, (48461) [2023-12-02 16:54:32,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98901 states to 98901 states and 185942 transitions. [2023-12-02 16:54:32,211 INFO L78 Accepts]: Start accepts. Automaton has 98901 states and 185942 transitions. Word has length 196 [2023-12-02 16:54:32,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:54:32,211 INFO L495 AbstractCegarLoop]: Abstraction has 98901 states and 185942 transitions. [2023-12-02 16:54:32,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2023-12-02 16:54:32,212 INFO L276 IsEmpty]: Start isEmpty. Operand 98901 states and 185942 transitions. [2023-12-02 16:54:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-12-02 16:54:32,231 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:54:32,232 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:54:32,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 16:54:32,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:54:32,432 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:54:32,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:54:32,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2120153220, now seen corresponding path program 1 times [2023-12-02 16:54:32,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:54:32,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213820220] [2023-12-02 16:54:32,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:54:32,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:54:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:54:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-12-02 16:54:33,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:54:33,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213820220] [2023-12-02 16:54:33,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213820220] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:54:33,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012806421] [2023-12-02 16:54:33,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:54:33,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:54:33,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:54:33,949 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:54:33,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a167ed6-076e-4c8a-9d5c-1d3626ee5fee/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 16:54:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:54:34,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 2163 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-02 16:54:34,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:54:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2023-12-02 16:54:35,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:54:39,100 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 9813 disjunctions. This might take some time... [2023-12-02 16:54:45,153 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 9813 disjunctions. [2023-12-02 16:54:45,533 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 9813 disjunctions. This might take some time... [2023-12-02 16:54:53,434 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 9813 disjunctions. [2023-12-02 16:54:53,720 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 9813 disjunctions. This might take some time... [2023-12-02 16:55:01,154 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 9813 disjunctions. [2023-12-02 16:55:01,256 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 49188 disjunctions. This might take some time...