./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_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_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/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_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/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_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/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 339ae17141354782861ad14ce1f1515b53735bca35311ebbaf6a68a6022f4172 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:36:00,624 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:36:00,689 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 17:36:00,693 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:36:00,694 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:36:00,718 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:36:00,718 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:36:00,719 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:36:00,719 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:36:00,720 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:36:00,720 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:36:00,721 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:36:00,721 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:36:00,722 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:36:00,722 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:36:00,723 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:36:00,723 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:36:00,724 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:36:00,724 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:36:00,725 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:36:00,725 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:36:00,726 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:36:00,727 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:36:00,727 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:36:00,727 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:36:00,728 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:36:00,728 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:36:00,729 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:36:00,729 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:36:00,729 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:36:00,729 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:36:00,730 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:36:00,730 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:36:00,730 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:36:00,731 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:36:00,731 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:36:00,731 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:36:00,731 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:36:00,731 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:36:00,732 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:36:00,732 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:36:00,732 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:36:00,732 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:36:00,732 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:36:00,733 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:36:00,733 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:36:00,733 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:36:00,733 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_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 339ae17141354782861ad14ce1f1515b53735bca35311ebbaf6a68a6022f4172 [2023-12-02 17:36:00,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:36:00,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:36:00,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:36:00,995 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:36:00,996 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:36:00,997 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c [2023-12-02 17:36:03,779 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:36:04,072 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:36:04,072 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c [2023-12-02 17:36:04,095 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/data/88d44a10f/e69586bb892547908a2237a724f12e38/FLAGbacd41894 [2023-12-02 17:36:04,109 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/data/88d44a10f/e69586bb892547908a2237a724f12e38 [2023-12-02 17:36:04,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:36:04,113 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:36:04,115 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:36:04,115 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:36:04,120 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:36:04,121 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:36:04" (1/1) ... [2023-12-02 17:36:04,122 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2831fc20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:04, skipping insertion in model container [2023-12-02 17:36:04,122 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:36:04" (1/1) ... [2023-12-02 17:36:04,208 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:36:04,646 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_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c[73050,73063] [2023-12-02 17:36:04,649 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:36:04,661 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:36:04,668 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Floor.i","") [48] [2023-12-02 17:36:04,669 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Person.i","") [716] [2023-12-02 17:36:04,669 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [837] [2023-12-02 17:36:04,669 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Elevator.i","") [875] [2023-12-02 17:36:04,670 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [2483] [2023-12-02 17:36:04,670 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification9_spec.i","") [2849] [2023-12-02 17:36:04,670 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [3009] [2023-12-02 17:36:04,670 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [3361] [2023-12-02 17:36:04,670 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"UnitTests.i","") [3373] [2023-12-02 17:36:04,671 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [3464] [2023-12-02 17:36:04,773 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_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/sv-benchmarks/c/product-lines/elevator_spec9_product28.cil.c[73050,73063] [2023-12-02 17:36:04,774 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:36:04,805 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:36:04,806 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:04 WrapperNode [2023-12-02 17:36:04,806 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:36:04,807 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:36:04,807 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:36:04,807 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:36:04,812 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:04" (1/1) ... [2023-12-02 17:36:04,841 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:04" (1/1) ... [2023-12-02 17:36:04,895 INFO L138 Inliner]: procedures = 97, calls = 345, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 1130 [2023-12-02 17:36:04,895 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:36:04,896 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:36:04,896 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:36:04,896 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:36:04,906 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:04" (1/1) ... [2023-12-02 17:36:04,906 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:04" (1/1) ... [2023-12-02 17:36:04,914 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:04" (1/1) ... [2023-12-02 17:36:04,914 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:04" (1/1) ... [2023-12-02 17:36:04,938 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:04" (1/1) ... [2023-12-02 17:36:04,954 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:04" (1/1) ... [2023-12-02 17:36:04,960 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:04" (1/1) ... [2023-12-02 17:36:04,966 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:04" (1/1) ... [2023-12-02 17:36:04,978 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:36:04,980 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:36:04,980 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:36:04,980 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:36:04,981 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:04" (1/1) ... [2023-12-02 17:36:04,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:36:05,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:36:05,017 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:36:05,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:36:05,054 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2023-12-02 17:36:05,055 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2023-12-02 17:36:05,055 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2023-12-02 17:36:05,055 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2023-12-02 17:36:05,055 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2023-12-02 17:36:05,055 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2023-12-02 17:36:05,055 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2023-12-02 17:36:05,055 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2023-12-02 17:36:05,056 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2023-12-02 17:36:05,056 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2023-12-02 17:36:05,056 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2023-12-02 17:36:05,057 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2023-12-02 17:36:05,057 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2023-12-02 17:36:05,057 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2023-12-02 17:36:05,057 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2023-12-02 17:36:05,057 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2023-12-02 17:36:05,057 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2023-12-02 17:36:05,058 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2023-12-02 17:36:05,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:36:05,058 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2023-12-02 17:36:05,058 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2023-12-02 17:36:05,058 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2023-12-02 17:36:05,058 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2023-12-02 17:36:05,058 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2023-12-02 17:36:05,058 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2023-12-02 17:36:05,059 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-12-02 17:36:05,059 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-12-02 17:36:05,059 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2023-12-02 17:36:05,059 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2023-12-02 17:36:05,059 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2023-12-02 17:36:05,059 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2023-12-02 17:36:05,059 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2023-12-02 17:36:05,060 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2023-12-02 17:36:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2023-12-02 17:36:05,060 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2023-12-02 17:36:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-12-02 17:36:05,060 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2023-12-02 17:36:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2023-12-02 17:36:05,060 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2023-12-02 17:36:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2023-12-02 17:36:05,061 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2023-12-02 17:36:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2023-12-02 17:36:05,061 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2023-12-02 17:36:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2023-12-02 17:36:05,061 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2023-12-02 17:36:05,061 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2023-12-02 17:36:05,061 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2023-12-02 17:36:05,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:36:05,062 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2023-12-02 17:36:05,062 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2023-12-02 17:36:05,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:36:05,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:36:05,062 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2023-12-02 17:36:05,062 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2023-12-02 17:36:05,062 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2023-12-02 17:36:05,063 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2023-12-02 17:36:05,253 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:36:05,256 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:36:06,241 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:36:07,045 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:36:07,045 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 17:36:07,047 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:36:07 BoogieIcfgContainer [2023-12-02 17:36:07,047 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:36:07,050 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:36:07,050 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:36:07,053 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:36:07,053 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:36:04" (1/3) ... [2023-12-02 17:36:07,054 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@325a310a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:36:07, skipping insertion in model container [2023-12-02 17:36:07,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:36:04" (2/3) ... [2023-12-02 17:36:07,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@325a310a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:36:07, skipping insertion in model container [2023-12-02 17:36:07,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:36:07" (3/3) ... [2023-12-02 17:36:07,056 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product28.cil.c [2023-12-02 17:36:07,076 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:36:07,076 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:36:07,135 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:36:07,142 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;@6d3076c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:36:07,142 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:36:07,149 INFO L276 IsEmpty]: Start isEmpty. Operand has 378 states, 253 states have (on average 1.5849802371541502) internal successors, (401), 276 states have internal predecessors, (401), 97 states have call successors, (97), 26 states have call predecessors, (97), 26 states have return successors, (97), 90 states have call predecessors, (97), 97 states have call successors, (97) [2023-12-02 17:36:07,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 17:36:07,161 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:07,161 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 17:36:07,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:07,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:07,167 INFO L85 PathProgramCache]: Analyzing trace with hash 255239779, now seen corresponding path program 1 times [2023-12-02 17:36:07,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:07,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981776539] [2023-12-02 17:36:07,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:07,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:07,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:07,540 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 17:36:07,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:07,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981776539] [2023-12-02 17:36:07,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981776539] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:07,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:36:07,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:36:07,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315636484] [2023-12-02 17:36:07,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:07,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 17:36:07,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:07,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 17:36:07,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 17:36:07,577 INFO L87 Difference]: Start difference. First operand has 378 states, 253 states have (on average 1.5849802371541502) internal successors, (401), 276 states have internal predecessors, (401), 97 states have call successors, (97), 26 states have call predecessors, (97), 26 states have return successors, (97), 90 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-12-02 17:36:07,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:07,717 INFO L93 Difference]: Finished difference Result 396 states and 622 transitions. [2023-12-02 17:36:07,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 17:36:07,720 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 43 [2023-12-02 17:36:07,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:07,736 INFO L225 Difference]: With dead ends: 396 [2023-12-02 17:36:07,736 INFO L226 Difference]: Without dead ends: 374 [2023-12-02 17:36:07,740 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 17:36:07,743 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:07,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 550 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:36:07,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-12-02 17:36:07,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2023-12-02 17:36:07,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 251 states have (on average 1.5737051792828685) internal successors, (395), 272 states have internal predecessors, (395), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 89 states have call predecessors, (92), 92 states have call successors, (92) [2023-12-02 17:36:07,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 584 transitions. [2023-12-02 17:36:07,811 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 584 transitions. Word has length 43 [2023-12-02 17:36:07,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:07,813 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 584 transitions. [2023-12-02 17:36:07,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2023-12-02 17:36:07,813 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 584 transitions. [2023-12-02 17:36:07,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 17:36:07,816 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:07,817 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 17:36:07,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:36:07,817 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:07,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:07,818 INFO L85 PathProgramCache]: Analyzing trace with hash 321221664, now seen corresponding path program 1 times [2023-12-02 17:36:07,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:07,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602924227] [2023-12-02 17:36:07,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:07,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:08,171 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 17:36:08,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:08,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602924227] [2023-12-02 17:36:08,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602924227] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:08,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:36:08,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 17:36:08,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239577960] [2023-12-02 17:36:08,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:08,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:36:08,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:08,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:36:08,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:36:08,175 INFO L87 Difference]: Start difference. First operand 374 states and 584 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 17:36:10,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:10,338 INFO L93 Difference]: Finished difference Result 1210 states and 1926 transitions. [2023-12-02 17:36:10,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:36:10,339 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2023-12-02 17:36:10,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:10,349 INFO L225 Difference]: With dead ends: 1210 [2023-12-02 17:36:10,349 INFO L226 Difference]: Without dead ends: 852 [2023-12-02 17:36:10,355 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 17:36:10,357 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 1929 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 754 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1994 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:10,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1994 Valid, 707 Invalid, 2015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 17:36:10,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2023-12-02 17:36:10,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 755. [2023-12-02 17:36:10,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 526 states have (on average 1.5893536121673004) internal successors, (836), 556 states have internal predecessors, (836), 181 states have call successors, (181), 46 states have call predecessors, (181), 47 states have return successors, (183), 165 states have call predecessors, (183), 176 states have call successors, (183) [2023-12-02 17:36:10,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1200 transitions. [2023-12-02 17:36:10,446 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1200 transitions. Word has length 44 [2023-12-02 17:36:10,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:10,447 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1200 transitions. [2023-12-02 17:36:10,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 17:36:10,447 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1200 transitions. [2023-12-02 17:36:10,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-02 17:36:10,456 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:10,457 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 17:36:10,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:36:10,457 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:10,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:10,458 INFO L85 PathProgramCache]: Analyzing trace with hash -546054229, now seen corresponding path program 1 times [2023-12-02 17:36:10,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:10,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260258545] [2023-12-02 17:36:10,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:10,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:10,927 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 17:36:10,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:10,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260258545] [2023-12-02 17:36:10,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260258545] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:10,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:36:10,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 17:36:10,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458263950] [2023-12-02 17:36:10,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:10,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 17:36:10,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:10,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 17:36:10,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:36:10,931 INFO L87 Difference]: Start difference. First operand 755 states and 1200 transitions. Second operand has 9 states, 7 states have (on average 6.714285714285714) internal successors, (47), 8 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-12-02 17:36:13,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:13,695 INFO L93 Difference]: Finished difference Result 2230 states and 3555 transitions. [2023-12-02 17:36:13,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 17:36:13,696 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 6.714285714285714) internal successors, (47), 8 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 87 [2023-12-02 17:36:13,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:13,708 INFO L225 Difference]: With dead ends: 2230 [2023-12-02 17:36:13,708 INFO L226 Difference]: Without dead ends: 1491 [2023-12-02 17:36:13,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-12-02 17:36:13,715 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 950 mSDsluCounter, 1993 mSDsCounter, 0 mSdLazyCounter, 4812 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 2520 SdHoareTripleChecker+Invalid, 5083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 4812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:13,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1018 Valid, 2520 Invalid, 5083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 4812 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 17:36:13,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2023-12-02 17:36:13,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1463. [2023-12-02 17:36:13,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1015 states have (on average 1.5733990147783252) internal successors, (1597), 1066 states have internal predecessors, (1597), 354 states have call successors, (354), 82 states have call predecessors, (354), 93 states have return successors, (373), 336 states have call predecessors, (373), 349 states have call successors, (373) [2023-12-02 17:36:13,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 2324 transitions. [2023-12-02 17:36:13,835 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 2324 transitions. Word has length 87 [2023-12-02 17:36:13,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:13,836 INFO L495 AbstractCegarLoop]: Abstraction has 1463 states and 2324 transitions. [2023-12-02 17:36:13,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 6.714285714285714) internal successors, (47), 8 states have internal predecessors, (47), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-12-02 17:36:13,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 2324 transitions. [2023-12-02 17:36:13,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-02 17:36:13,840 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:13,840 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 17:36:13,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 17:36:13,841 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:13,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:13,841 INFO L85 PathProgramCache]: Analyzing trace with hash 452467832, now seen corresponding path program 1 times [2023-12-02 17:36:13,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:13,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689811741] [2023-12-02 17:36:13,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:13,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:14,251 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 17:36:14,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:14,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689811741] [2023-12-02 17:36:14,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689811741] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:14,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:36:14,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 17:36:14,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280516460] [2023-12-02 17:36:14,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:14,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:36:14,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:14,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:36:14,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:36:14,254 INFO L87 Difference]: Start difference. First operand 1463 states and 2324 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-12-02 17:36:15,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:15,977 INFO L93 Difference]: Finished difference Result 3777 states and 6008 transitions. [2023-12-02 17:36:15,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 17:36:15,978 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 88 [2023-12-02 17:36:15,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:15,999 INFO L225 Difference]: With dead ends: 3777 [2023-12-02 17:36:15,999 INFO L226 Difference]: Without dead ends: 2332 [2023-12-02 17:36:16,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-12-02 17:36:16,011 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 1128 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 2171 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 2598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 2171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:16,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 1460 Invalid, 2598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 2171 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 17:36:16,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2023-12-02 17:36:16,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 2259. [2023-12-02 17:36:16,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2259 states, 1577 states have (on average 1.5757767913760303) internal successors, (2485), 1655 states have internal predecessors, (2485), 527 states have call successors, (527), 135 states have call predecessors, (527), 154 states have return successors, (572), 501 states have call predecessors, (572), 522 states have call successors, (572) [2023-12-02 17:36:16,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 3584 transitions. [2023-12-02 17:36:16,189 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 3584 transitions. Word has length 88 [2023-12-02 17:36:16,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:16,190 INFO L495 AbstractCegarLoop]: Abstraction has 2259 states and 3584 transitions. [2023-12-02 17:36:16,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-12-02 17:36:16,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 3584 transitions. [2023-12-02 17:36:16,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-02 17:36:16,194 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:16,194 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 17:36:16,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 17:36:16,195 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:16,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:16,195 INFO L85 PathProgramCache]: Analyzing trace with hash -148019924, now seen corresponding path program 1 times [2023-12-02 17:36:16,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:16,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925863937] [2023-12-02 17:36:16,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:16,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:16,501 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 17:36:16,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:16,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925863937] [2023-12-02 17:36:16,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925863937] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:16,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:36:16,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 17:36:16,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378019021] [2023-12-02 17:36:16,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:16,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:36:16,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:16,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:36:16,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:36:16,504 INFO L87 Difference]: Start difference. First operand 2259 states and 3584 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 17:36:17,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:17,220 INFO L93 Difference]: Finished difference Result 2360 states and 3752 transitions. [2023-12-02 17:36:17,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:36:17,221 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 92 [2023-12-02 17:36:17,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:17,240 INFO L225 Difference]: With dead ends: 2360 [2023-12-02 17:36:17,240 INFO L226 Difference]: Without dead ends: 2345 [2023-12-02 17:36:17,242 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 17:36:17,243 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 678 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 1793 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 17:36:17,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 1793 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:36:17,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2023-12-02 17:36:17,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 2265. [2023-12-02 17:36:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 1583 states have (on average 1.5735944409349336) internal successors, (2491), 1661 states have internal predecessors, (2491), 527 states have call successors, (527), 135 states have call predecessors, (527), 154 states have return successors, (572), 501 states have call predecessors, (572), 522 states have call successors, (572) [2023-12-02 17:36:17,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 3590 transitions. [2023-12-02 17:36:17,459 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 3590 transitions. Word has length 92 [2023-12-02 17:36:17,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:17,459 INFO L495 AbstractCegarLoop]: Abstraction has 2265 states and 3590 transitions. [2023-12-02 17:36:17,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 17:36:17,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 3590 transitions. [2023-12-02 17:36:17,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-12-02 17:36:17,463 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:17,463 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 17:36:17,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 17:36:17,464 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:17,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:17,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1706929718, now seen corresponding path program 1 times [2023-12-02 17:36:17,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:17,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427688824] [2023-12-02 17:36:17,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:17,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:17,783 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 17:36:17,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:17,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427688824] [2023-12-02 17:36:17,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427688824] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:17,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:36:17,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 17:36:17,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144419698] [2023-12-02 17:36:17,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:17,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:36:17,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:17,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:36:17,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:36:17,786 INFO L87 Difference]: Start difference. First operand 2265 states and 3590 transitions. Second operand has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2023-12-02 17:36:18,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:18,475 INFO L93 Difference]: Finished difference Result 2430 states and 3833 transitions. [2023-12-02 17:36:18,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 17:36:18,476 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) Word has length 97 [2023-12-02 17:36:18,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:18,492 INFO L225 Difference]: With dead ends: 2430 [2023-12-02 17:36:18,492 INFO L226 Difference]: Without dead ends: 2415 [2023-12-02 17:36:18,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-12-02 17:36:18,495 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 613 mSDsluCounter, 2069 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 2612 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:18,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 2612 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:36:18,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2023-12-02 17:36:18,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 2361. [2023-12-02 17:36:18,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 1655 states have (on average 1.5691842900302115) internal successors, (2597), 1733 states have internal predecessors, (2597), 543 states have call successors, (543), 143 states have call predecessors, (543), 162 states have return successors, (598), 517 states have call predecessors, (598), 538 states have call successors, (598) [2023-12-02 17:36:18,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 3738 transitions. [2023-12-02 17:36:18,693 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 3738 transitions. Word has length 97 [2023-12-02 17:36:18,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:18,693 INFO L495 AbstractCegarLoop]: Abstraction has 2361 states and 3738 transitions. [2023-12-02 17:36:18,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2023-12-02 17:36:18,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 3738 transitions. [2023-12-02 17:36:18,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-12-02 17:36:18,697 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:18,698 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 17:36:18,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 17:36:18,698 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:18,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:18,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1889980221, now seen corresponding path program 1 times [2023-12-02 17:36:18,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:18,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958635667] [2023-12-02 17:36:18,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:18,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:18,810 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 17:36:18,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:18,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958635667] [2023-12-02 17:36:18,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958635667] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:18,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:36:18,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:36:18,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130730733] [2023-12-02 17:36:18,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:18,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:36:18,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:18,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:36:18,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:36:18,813 INFO L87 Difference]: Start difference. First operand 2361 states and 3738 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 17:36:19,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:19,212 INFO L93 Difference]: Finished difference Result 6053 states and 9675 transitions. [2023-12-02 17:36:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:36:19,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 104 [2023-12-02 17:36:19,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:19,231 INFO L225 Difference]: With dead ends: 6053 [2023-12-02 17:36:19,231 INFO L226 Difference]: Without dead ends: 3708 [2023-12-02 17:36:19,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:36:19,243 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 540 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:19,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 1133 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:36:19,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3708 states. [2023-12-02 17:36:19,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3708 to 3668. [2023-12-02 17:36:19,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3668 states, 2580 states have (on average 1.563953488372093) internal successors, (4035), 2705 states have internal predecessors, (4035), 835 states have call successors, (835), 219 states have call predecessors, (835), 252 states have return successors, (968), 791 states have call predecessors, (968), 830 states have call successors, (968) [2023-12-02 17:36:19,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3668 states to 3668 states and 5838 transitions. [2023-12-02 17:36:19,491 INFO L78 Accepts]: Start accepts. Automaton has 3668 states and 5838 transitions. Word has length 104 [2023-12-02 17:36:19,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:19,492 INFO L495 AbstractCegarLoop]: Abstraction has 3668 states and 5838 transitions. [2023-12-02 17:36:19,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 17:36:19,492 INFO L276 IsEmpty]: Start isEmpty. Operand 3668 states and 5838 transitions. [2023-12-02 17:36:19,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-12-02 17:36:19,496 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:19,496 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 17:36:19,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 17:36:19,497 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:19,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:19,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1540432520, now seen corresponding path program 1 times [2023-12-02 17:36:19,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:19,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404674888] [2023-12-02 17:36:19,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:19,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:19,608 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 17:36:19,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:19,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404674888] [2023-12-02 17:36:19,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404674888] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:19,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:36:19,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:36:19,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994870340] [2023-12-02 17:36:19,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:19,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:36:19,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:19,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:36:19,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:36:19,610 INFO L87 Difference]: Start difference. First operand 3668 states and 5838 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 17:36:20,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:20,116 INFO L93 Difference]: Finished difference Result 9973 states and 16102 transitions. [2023-12-02 17:36:20,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:36:20,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 105 [2023-12-02 17:36:20,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:20,159 INFO L225 Difference]: With dead ends: 9973 [2023-12-02 17:36:20,159 INFO L226 Difference]: Without dead ends: 6324 [2023-12-02 17:36:20,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:36:20,179 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 539 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:20,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 1139 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:36:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6324 states. [2023-12-02 17:36:20,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6324 to 6283. [2023-12-02 17:36:20,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6283 states, 4431 states have (on average 1.5590160234709998) internal successors, (6908), 4650 states have internal predecessors, (6908), 1419 states have call successors, (1419), 371 states have call predecessors, (1419), 432 states have return successors, (1778), 1339 states have call predecessors, (1778), 1414 states have call successors, (1778) [2023-12-02 17:36:20,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6283 states to 6283 states and 10105 transitions. [2023-12-02 17:36:20,723 INFO L78 Accepts]: Start accepts. Automaton has 6283 states and 10105 transitions. Word has length 105 [2023-12-02 17:36:20,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:20,723 INFO L495 AbstractCegarLoop]: Abstraction has 6283 states and 10105 transitions. [2023-12-02 17:36:20,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 17:36:20,724 INFO L276 IsEmpty]: Start isEmpty. Operand 6283 states and 10105 transitions. [2023-12-02 17:36:20,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-12-02 17:36:20,728 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:20,728 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 17:36:20,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 17:36:20,728 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:20,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:20,729 INFO L85 PathProgramCache]: Analyzing trace with hash -509041185, now seen corresponding path program 1 times [2023-12-02 17:36:20,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:20,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698709142] [2023-12-02 17:36:20,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:20,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:20,838 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 17:36:20,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:20,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698709142] [2023-12-02 17:36:20,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698709142] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:20,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:36:20,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:36:20,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346613143] [2023-12-02 17:36:20,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:20,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:36:20,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:20,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:36:20,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:36:20,840 INFO L87 Difference]: Start difference. First operand 6283 states and 10105 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 17:36:21,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:21,584 INFO L93 Difference]: Finished difference Result 17814 states and 29324 transitions. [2023-12-02 17:36:21,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:36:21,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 106 [2023-12-02 17:36:21,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:21,654 INFO L225 Difference]: With dead ends: 17814 [2023-12-02 17:36:21,654 INFO L226 Difference]: Without dead ends: 11556 [2023-12-02 17:36:21,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:36:21,685 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 538 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:21,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1145 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:36:21,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11556 states. [2023-12-02 17:36:22,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11556 to 11514. [2023-12-02 17:36:22,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11514 states, 8134 states have (on average 1.5539709859847552) internal successors, (12640), 8541 states have internal predecessors, (12640), 2587 states have call successors, (2587), 675 states have call predecessors, (2587), 792 states have return successors, (3662), 2435 states have call predecessors, (3662), 2582 states have call successors, (3662) [2023-12-02 17:36:22,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11514 states to 11514 states and 18889 transitions. [2023-12-02 17:36:22,575 INFO L78 Accepts]: Start accepts. Automaton has 11514 states and 18889 transitions. Word has length 106 [2023-12-02 17:36:22,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:22,576 INFO L495 AbstractCegarLoop]: Abstraction has 11514 states and 18889 transitions. [2023-12-02 17:36:22,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 17:36:22,576 INFO L276 IsEmpty]: Start isEmpty. Operand 11514 states and 18889 transitions. [2023-12-02 17:36:22,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-12-02 17:36:22,580 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:22,581 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 17:36:22,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 17:36:22,581 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:22,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:22,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1399323034, now seen corresponding path program 1 times [2023-12-02 17:36:22,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:22,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24098907] [2023-12-02 17:36:22,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:22,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:22,692 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 17:36:22,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:22,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24098907] [2023-12-02 17:36:22,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24098907] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:22,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:36:22,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:36:22,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284198111] [2023-12-02 17:36:22,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:22,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:36:22,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:22,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:36:22,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:36:22,695 INFO L87 Difference]: Start difference. First operand 11514 states and 18889 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 17:36:24,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:24,220 INFO L93 Difference]: Finished difference Result 33497 states and 57073 transitions. [2023-12-02 17:36:24,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:36:24,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 107 [2023-12-02 17:36:24,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:24,348 INFO L225 Difference]: With dead ends: 33497 [2023-12-02 17:36:24,348 INFO L226 Difference]: Without dead ends: 22020 [2023-12-02 17:36:24,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:36:24,402 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 537 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:24,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 1151 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:36:24,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22020 states. [2023-12-02 17:36:25,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22020 to 21977. [2023-12-02 17:36:25,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21977 states, 15541 states have (on average 1.548677691268258) internal successors, (24068), 16324 states have internal predecessors, (24068), 4923 states have call successors, (4923), 1283 states have call predecessors, (4923), 1512 states have return successors, (8366), 4627 states have call predecessors, (8366), 4918 states have call successors, (8366) [2023-12-02 17:36:26,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21977 states to 21977 states and 37357 transitions. [2023-12-02 17:36:26,095 INFO L78 Accepts]: Start accepts. Automaton has 21977 states and 37357 transitions. Word has length 107 [2023-12-02 17:36:26,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:26,096 INFO L495 AbstractCegarLoop]: Abstraction has 21977 states and 37357 transitions. [2023-12-02 17:36:26,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 17:36:26,096 INFO L276 IsEmpty]: Start isEmpty. Operand 21977 states and 37357 transitions. [2023-12-02 17:36:26,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-02 17:36:26,101 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:26,101 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 17:36:26,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 17:36:26,101 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:26,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:26,102 INFO L85 PathProgramCache]: Analyzing trace with hash 429075585, now seen corresponding path program 1 times [2023-12-02 17:36:26,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:26,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868583902] [2023-12-02 17:36:26,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:26,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:26,202 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 17:36:26,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:26,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868583902] [2023-12-02 17:36:26,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868583902] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:26,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:36:26,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:36:26,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907584238] [2023-12-02 17:36:26,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:26,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:36:26,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:26,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:36:26,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:36:26,205 INFO L87 Difference]: Start difference. First operand 21977 states and 37357 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 17:36:27,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:27,529 INFO L93 Difference]: Finished difference Result 23329 states and 39969 transitions. [2023-12-02 17:36:27,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:36:27,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 108 [2023-12-02 17:36:27,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:27,618 INFO L225 Difference]: With dead ends: 23329 [2023-12-02 17:36:27,618 INFO L226 Difference]: Without dead ends: 23318 [2023-12-02 17:36:27,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:36:27,631 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 523 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1149 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:27,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 1149 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:36:27,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23318 states. [2023-12-02 17:36:28,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23318 to 23274. [2023-12-02 17:36:28,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23274 states, 16457 states have (on average 1.546575925138239) internal successors, (25452), 17287 states have internal predecessors, (25452), 5215 states have call successors, (5215), 1359 states have call predecessors, (5215), 1601 states have return successors, (9212), 4900 states have call predecessors, (9212), 5210 states have call successors, (9212) [2023-12-02 17:36:29,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23274 states to 23274 states and 39879 transitions. [2023-12-02 17:36:29,026 INFO L78 Accepts]: Start accepts. Automaton has 23274 states and 39879 transitions. Word has length 108 [2023-12-02 17:36:29,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:29,027 INFO L495 AbstractCegarLoop]: Abstraction has 23274 states and 39879 transitions. [2023-12-02 17:36:29,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 17:36:29,027 INFO L276 IsEmpty]: Start isEmpty. Operand 23274 states and 39879 transitions. [2023-12-02 17:36:29,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-12-02 17:36:29,039 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:29,039 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2023-12-02 17:36:29,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 17:36:29,039 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:29,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:29,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1978342467, now seen corresponding path program 1 times [2023-12-02 17:36:29,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:29,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663459899] [2023-12-02 17:36:29,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:29,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:29,245 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 17:36:29,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:29,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663459899] [2023-12-02 17:36:29,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663459899] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:29,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:36:29,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:36:29,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753092351] [2023-12-02 17:36:29,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:29,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:36:29,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:29,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:36:29,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:36:29,247 INFO L87 Difference]: Start difference. First operand 23274 states and 39879 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, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-12-02 17:36:30,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:30,580 INFO L93 Difference]: Finished difference Result 47413 states and 83823 transitions. [2023-12-02 17:36:30,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:36:30,581 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, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 161 [2023-12-02 17:36:30,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:30,666 INFO L225 Difference]: With dead ends: 47413 [2023-12-02 17:36:30,666 INFO L226 Difference]: Without dead ends: 24156 [2023-12-02 17:36:30,729 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 17:36:30,730 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 30 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1620 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:30,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1620 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:36:30,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24156 states. [2023-12-02 17:36:32,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24156 to 23382. [2023-12-02 17:36:32,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23382 states, 16565 states have (on average 1.543012375490492) internal successors, (25560), 17395 states have internal predecessors, (25560), 5215 states have call successors, (5215), 1359 states have call predecessors, (5215), 1601 states have return successors, (9212), 4900 states have call predecessors, (9212), 5210 states have call successors, (9212) [2023-12-02 17:36:32,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23382 states to 23382 states and 39987 transitions. [2023-12-02 17:36:32,665 INFO L78 Accepts]: Start accepts. Automaton has 23382 states and 39987 transitions. Word has length 161 [2023-12-02 17:36:32,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:32,666 INFO L495 AbstractCegarLoop]: Abstraction has 23382 states and 39987 transitions. [2023-12-02 17:36:32,666 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, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-12-02 17:36:32,666 INFO L276 IsEmpty]: Start isEmpty. Operand 23382 states and 39987 transitions. [2023-12-02 17:36:32,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-12-02 17:36:32,676 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:32,676 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2023-12-02 17:36:32,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 17:36:32,676 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:32,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:32,677 INFO L85 PathProgramCache]: Analyzing trace with hash -179356547, now seen corresponding path program 1 times [2023-12-02 17:36:32,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:32,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026514217] [2023-12-02 17:36:32,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:32,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-12-02 17:36:32,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:32,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026514217] [2023-12-02 17:36:32,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026514217] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:36:32,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044223018] [2023-12-02 17:36:32,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:32,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:36:32,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:36:32,933 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:36:32,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:36:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:33,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 2106 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:36:33,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:36:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-02 17:36:33,445 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:36:33,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044223018] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:33,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:36:33,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-12-02 17:36:33,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917518326] [2023-12-02 17:36:33,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:33,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:36:33,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:33,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:36:33,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:36:33,448 INFO L87 Difference]: Start difference. First operand 23382 states and 39987 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-12-02 17:36:34,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:34,982 INFO L93 Difference]: Finished difference Result 48151 states and 85662 transitions. [2023-12-02 17:36:34,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:36:34,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 164 [2023-12-02 17:36:34,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:35,085 INFO L225 Difference]: With dead ends: 48151 [2023-12-02 17:36:35,086 INFO L226 Difference]: Without dead ends: 24786 [2023-12-02 17:36:35,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:36:35,153 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 213 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:35,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1419 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:36:35,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24786 states. [2023-12-02 17:36:36,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24786 to 24786. [2023-12-02 17:36:36,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24786 states, 17933 states have (on average 1.5718507778955) internal successors, (28188), 18763 states have internal predecessors, (28188), 5215 states have call successors, (5215), 1395 states have call predecessors, (5215), 1637 states have return successors, (9212), 4900 states have call predecessors, (9212), 5210 states have call successors, (9212) [2023-12-02 17:36:36,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24786 states to 24786 states and 42615 transitions. [2023-12-02 17:36:36,505 INFO L78 Accepts]: Start accepts. Automaton has 24786 states and 42615 transitions. Word has length 164 [2023-12-02 17:36:36,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:36,506 INFO L495 AbstractCegarLoop]: Abstraction has 24786 states and 42615 transitions. [2023-12-02 17:36:36,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-12-02 17:36:36,506 INFO L276 IsEmpty]: Start isEmpty. Operand 24786 states and 42615 transitions. [2023-12-02 17:36:36,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-12-02 17:36:36,515 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:36,515 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 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] [2023-12-02 17:36:36,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:36:36,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 17:36:36,716 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:36,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:36,717 INFO L85 PathProgramCache]: Analyzing trace with hash 19063889, now seen corresponding path program 1 times [2023-12-02 17:36:36,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:36,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893137804] [2023-12-02 17:36:36,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:36,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-12-02 17:36:36,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:36,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893137804] [2023-12-02 17:36:36,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893137804] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:36:36,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086906772] [2023-12-02 17:36:36,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:36,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:36:36,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:36:36,877 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:36:36,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:36:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:37,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 2111 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:36:37,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:36:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 17:36:37,280 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:36:37,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086906772] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:37,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:36:37,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-12-02 17:36:37,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943532653] [2023-12-02 17:36:37,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:37,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:36:37,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:37,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:36:37,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:36:37,282 INFO L87 Difference]: Start difference. First operand 24786 states and 42615 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-12-02 17:36:38,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:38,576 INFO L93 Difference]: Finished difference Result 50959 states and 90813 transitions. [2023-12-02 17:36:38,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:36:38,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 169 [2023-12-02 17:36:38,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:38,666 INFO L225 Difference]: With dead ends: 50959 [2023-12-02 17:36:38,666 INFO L226 Difference]: Without dead ends: 26190 [2023-12-02 17:36:38,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 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 17:36:38,724 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 211 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:38,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1419 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:36:38,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26190 states. [2023-12-02 17:36:40,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26190 to 26190. [2023-12-02 17:36:40,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26190 states, 19301 states have (on average 1.596601212372416) internal successors, (30816), 20131 states have internal predecessors, (30816), 5215 states have call successors, (5215), 1431 states have call predecessors, (5215), 1673 states have return successors, (9212), 4900 states have call predecessors, (9212), 5210 states have call successors, (9212) [2023-12-02 17:36:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26190 states to 26190 states and 45243 transitions. [2023-12-02 17:36:40,729 INFO L78 Accepts]: Start accepts. Automaton has 26190 states and 45243 transitions. Word has length 169 [2023-12-02 17:36:40,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:40,729 INFO L495 AbstractCegarLoop]: Abstraction has 26190 states and 45243 transitions. [2023-12-02 17:36:40,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-12-02 17:36:40,730 INFO L276 IsEmpty]: Start isEmpty. Operand 26190 states and 45243 transitions. [2023-12-02 17:36:40,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-12-02 17:36:40,738 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:40,738 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 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] [2023-12-02 17:36:40,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 17:36:40,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 17:36:40,939 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:40,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:40,939 INFO L85 PathProgramCache]: Analyzing trace with hash -349049583, now seen corresponding path program 1 times [2023-12-02 17:36:40,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:40,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212683694] [2023-12-02 17:36:40,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:40,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:41,294 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-12-02 17:36:41,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:41,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212683694] [2023-12-02 17:36:41,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212683694] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:36:41,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062872287] [2023-12-02 17:36:41,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:41,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:36:41,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:36:41,296 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:36:41,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:36:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:41,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 2115 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:36:41,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:36:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:36:41,751 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:36:41,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062872287] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:41,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:36:41,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-12-02 17:36:41,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933653953] [2023-12-02 17:36:41,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:41,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:36:41,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:41,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:36:41,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:36:41,753 INFO L87 Difference]: Start difference. First operand 26190 states and 45243 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, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-12-02 17:36:43,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:43,029 INFO L93 Difference]: Finished difference Result 53767 states and 95964 transitions. [2023-12-02 17:36:43,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:36:43,030 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, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 173 [2023-12-02 17:36:43,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:43,111 INFO L225 Difference]: With dead ends: 53767 [2023-12-02 17:36:43,111 INFO L226 Difference]: Without dead ends: 27594 [2023-12-02 17:36:43,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 173 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 17:36:43,161 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 209 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:43,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1419 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:36:43,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27594 states. [2023-12-02 17:36:44,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27594 to 27594. [2023-12-02 17:36:44,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27594 states, 20669 states have (on average 1.6180753785862887) internal successors, (33444), 21499 states have internal predecessors, (33444), 5215 states have call successors, (5215), 1467 states have call predecessors, (5215), 1709 states have return successors, (9212), 4900 states have call predecessors, (9212), 5210 states have call successors, (9212) [2023-12-02 17:36:44,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27594 states to 27594 states and 47871 transitions. [2023-12-02 17:36:44,535 INFO L78 Accepts]: Start accepts. Automaton has 27594 states and 47871 transitions. Word has length 173 [2023-12-02 17:36:44,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:44,536 INFO L495 AbstractCegarLoop]: Abstraction has 27594 states and 47871 transitions. [2023-12-02 17:36:44,536 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, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-12-02 17:36:44,536 INFO L276 IsEmpty]: Start isEmpty. Operand 27594 states and 47871 transitions. [2023-12-02 17:36:44,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-12-02 17:36:44,544 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:44,544 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 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] [2023-12-02 17:36:44,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 17:36:44,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 17:36:44,745 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:44,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:44,745 INFO L85 PathProgramCache]: Analyzing trace with hash -765958179, now seen corresponding path program 1 times [2023-12-02 17:36:44,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:44,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052901951] [2023-12-02 17:36:44,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:44,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:47,174 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-02 17:36:47,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:47,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052901951] [2023-12-02 17:36:47,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052901951] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:36:47,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315902675] [2023-12-02 17:36:47,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:47,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:36:47,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:36:47,175 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:36:47,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 17:36:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:47,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 2118 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:36:47,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:36:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 17:36:47,575 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:36:47,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315902675] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:47,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:36:47,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [25] total 27 [2023-12-02 17:36:47,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108419582] [2023-12-02 17:36:47,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:47,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:36:47,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:47,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:36:47,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2023-12-02 17:36:47,578 INFO L87 Difference]: Start difference. First operand 27594 states and 47871 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-12-02 17:36:49,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:49,376 INFO L93 Difference]: Finished difference Result 56575 states and 101115 transitions. [2023-12-02 17:36:49,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:36:49,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 176 [2023-12-02 17:36:49,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:49,474 INFO L225 Difference]: With dead ends: 56575 [2023-12-02 17:36:49,474 INFO L226 Difference]: Without dead ends: 28998 [2023-12-02 17:36:49,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:36:49,538 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 207 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:49,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1419 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:36:49,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28998 states. [2023-12-02 17:36:50,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28998 to 28998. [2023-12-02 17:36:50,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28998 states, 22037 states have (on average 1.6368834233334846) internal successors, (36072), 22867 states have internal predecessors, (36072), 5215 states have call successors, (5215), 1503 states have call predecessors, (5215), 1745 states have return successors, (9212), 4900 states have call predecessors, (9212), 5210 states have call successors, (9212) [2023-12-02 17:36:50,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28998 states to 28998 states and 50499 transitions. [2023-12-02 17:36:50,920 INFO L78 Accepts]: Start accepts. Automaton has 28998 states and 50499 transitions. Word has length 176 [2023-12-02 17:36:50,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:50,921 INFO L495 AbstractCegarLoop]: Abstraction has 28998 states and 50499 transitions. [2023-12-02 17:36:50,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-12-02 17:36:50,921 INFO L276 IsEmpty]: Start isEmpty. Operand 28998 states and 50499 transitions. [2023-12-02 17:36:50,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-12-02 17:36:50,927 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:50,927 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:36:50,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 17:36:51,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 17:36:51,128 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:51,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:51,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1472082833, now seen corresponding path program 1 times [2023-12-02 17:36:51,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:51,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350803375] [2023-12-02 17:36:51,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:51,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:53,059 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-12-02 17:36:53,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:53,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350803375] [2023-12-02 17:36:53,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350803375] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:36:53,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187601142] [2023-12-02 17:36:53,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:53,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:36:53,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:36:53,061 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:36:53,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 17:36:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:53,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 2114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 17:36:53,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:36:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-12-02 17:36:53,605 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:36:53,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187601142] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:53,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:36:53,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [25] total 29 [2023-12-02 17:36:53,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887079316] [2023-12-02 17:36:53,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:53,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:36:53,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:53,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:36:53,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2023-12-02 17:36:53,607 INFO L87 Difference]: Start difference. First operand 28998 states and 50499 transitions. Second operand has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 3 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2023-12-02 17:36:55,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:36:55,170 INFO L93 Difference]: Finished difference Result 59624 states and 104300 transitions. [2023-12-02 17:36:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:36:55,171 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 3 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) Word has length 178 [2023-12-02 17:36:55,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:36:55,275 INFO L225 Difference]: With dead ends: 59624 [2023-12-02 17:36:55,275 INFO L226 Difference]: Without dead ends: 30688 [2023-12-02 17:36:55,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2023-12-02 17:36:55,340 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 319 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 2601 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:36:55,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 2601 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:36:55,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30688 states. [2023-12-02 17:36:56,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30688 to 30483. [2023-12-02 17:36:56,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30483 states, 23018 states have (on average 1.6198192718741855) internal successors, (37285), 23884 states have internal predecessors, (37285), 5528 states have call successors, (5528), 1712 states have call predecessors, (5528), 1936 states have return successors, (10260), 5159 states have call predecessors, (10260), 5523 states have call successors, (10260) [2023-12-02 17:36:56,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30483 states to 30483 states and 53073 transitions. [2023-12-02 17:36:56,846 INFO L78 Accepts]: Start accepts. Automaton has 30483 states and 53073 transitions. Word has length 178 [2023-12-02 17:36:56,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:36:56,846 INFO L495 AbstractCegarLoop]: Abstraction has 30483 states and 53073 transitions. [2023-12-02 17:36:56,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 3 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2023-12-02 17:36:56,846 INFO L276 IsEmpty]: Start isEmpty. Operand 30483 states and 53073 transitions. [2023-12-02 17:36:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-12-02 17:36:56,853 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:36:56,853 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:36:56,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 17:36:57,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 17:36:57,054 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:36:57,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:36:57,054 INFO L85 PathProgramCache]: Analyzing trace with hash -864714741, now seen corresponding path program 1 times [2023-12-02 17:36:57,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:36:57,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51578695] [2023-12-02 17:36:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:57,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:36:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-12-02 17:36:58,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:36:58,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51578695] [2023-12-02 17:36:58,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51578695] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:36:58,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720382486] [2023-12-02 17:36:58,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:36:58,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:36:58,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:36:58,648 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:36:58,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 17:36:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:36:58,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 2120 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:36:58,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:36:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-12-02 17:36:59,002 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:36:59,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720382486] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:36:59,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:36:59,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [25] total 27 [2023-12-02 17:36:59,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097150968] [2023-12-02 17:36:59,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:36:59,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:36:59,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:36:59,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:36:59,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2023-12-02 17:36:59,005 INFO L87 Difference]: Start difference. First operand 30483 states and 53073 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 1 states have call successors, (29) [2023-12-02 17:37:00,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:37:00,143 INFO L93 Difference]: Finished difference Result 32021 states and 59689 transitions. [2023-12-02 17:37:00,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:37:00,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 1 states have call successors, (29) Word has length 181 [2023-12-02 17:37:00,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:37:00,301 INFO L225 Difference]: With dead ends: 32021 [2023-12-02 17:37:00,301 INFO L226 Difference]: Without dead ends: 31935 [2023-12-02 17:37:00,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:37:00,323 INFO L413 NwaCegarLoop]: 581 mSDtfsCounter, 47 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:37:00,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1694 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:37:00,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31935 states. [2023-12-02 17:37:01,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31935 to 30675. [2023-12-02 17:37:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30675 states, 23210 states have (on average 1.614691943127962) internal successors, (37477), 24076 states have internal predecessors, (37477), 5528 states have call successors, (5528), 1712 states have call predecessors, (5528), 1936 states have return successors, (10260), 5159 states have call predecessors, (10260), 5523 states have call successors, (10260) [2023-12-02 17:37:01,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30675 states to 30675 states and 53265 transitions. [2023-12-02 17:37:01,928 INFO L78 Accepts]: Start accepts. Automaton has 30675 states and 53265 transitions. Word has length 181 [2023-12-02 17:37:01,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:37:01,928 INFO L495 AbstractCegarLoop]: Abstraction has 30675 states and 53265 transitions. [2023-12-02 17:37:01,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 1 states have call successors, (29) [2023-12-02 17:37:01,929 INFO L276 IsEmpty]: Start isEmpty. Operand 30675 states and 53265 transitions. [2023-12-02 17:37:01,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2023-12-02 17:37:01,936 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:37:01,936 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:37:01,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 17:37:02,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 17:37:02,137 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:37:02,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:37:02,137 INFO L85 PathProgramCache]: Analyzing trace with hash -437647194, now seen corresponding path program 1 times [2023-12-02 17:37:02,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:37:02,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934710919] [2023-12-02 17:37:02,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:37:02,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:37:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:37:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-12-02 17:37:02,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:37:02,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934710919] [2023-12-02 17:37:02,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934710919] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:37:02,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181464202] [2023-12-02 17:37:02,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:37:02,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:37:02,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:37:02,500 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:37:02,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 17:37:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:37:02,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 2905 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 17:37:02,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:37:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2023-12-02 17:37:03,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:37:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2023-12-02 17:37:03,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181464202] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:37:03,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [73149583] [2023-12-02 17:37:03,810 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2023-12-02 17:37:03,810 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:37:03,814 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:37:03,819 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:37:03,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:37:33,332 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 408 for LOIs [2023-12-02 17:37:33,552 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 594 for LOIs [2023-12-02 17:39:55,470 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 633 for LOIs [2023-12-02 17:40:05,152 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 196 for LOIs [2023-12-02 17:40:21,382 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 32 for LOIs [2023-12-02 17:40:21,413 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 322 for LOIs [2023-12-02 17:40:32,822 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 32 for LOIs [2023-12-02 17:40:32,938 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 18 for LOIs [2023-12-02 17:40:32,960 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 639 for LOIs [2023-12-02 17:40:35,146 INFO L197 IcfgInterpreter]: Interpreting procedure enterElevator with input of size 67 for LOIs [2023-12-02 17:40:35,264 INFO L197 IcfgInterpreter]: Interpreting procedure pressInLiftFloorButton with input of size 79 for LOIs [2023-12-02 17:40:35,293 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 22 for LOIs [2023-12-02 17:40:35,295 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 585 for LOIs [2023-12-02 17:40:48,655 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 589 for LOIs [2023-12-02 17:40:51,671 INFO L197 IcfgInterpreter]: Interpreting procedure isEmpty with input of size 28 for LOIs [2023-12-02 17:40:51,707 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 33 for LOIs [2023-12-02 17:40:51,712 INFO L197 IcfgInterpreter]: Interpreting procedure getWeight with input of size 53 for LOIs [2023-12-02 17:40:51,731 INFO L197 IcfgInterpreter]: Interpreting procedure getDestination with input of size 49 for LOIs [2023-12-02 17:40:51,747 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 517 for LOIs [2023-12-02 17:40:52,438 INFO L197 IcfgInterpreter]: Interpreting procedure removePersonFromFloor with input of size 156 for LOIs [2023-12-02 17:40:52,832 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 71 for LOIs [2023-12-02 17:40:52,888 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:41:57,305 WARN L293 SmtUtils]: Spent 14.32s on a formula simplification. DAG size of input: 633 DAG size of output: 627 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:43:15,753 WARN L293 SmtUtils]: Spent 8.31s on a formula simplification. DAG size of input: 510 DAG size of output: 508 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:43:39,828 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '915444#(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) (<= 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) (= (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)) (= (select (select |#memory_int| 17) 1) 37) (= (select (select |#memory_int| 6) 1) 93) (= (select |#valid| 1) 1) (= (select |#valid| 20) 1) (not (= 0 ~floorButtons_spc9_1~0)) (= (select |#length| 24) 2) (= (select (select |#memory_int| 12) 6) 0) (= 0 ~floorButtons_spc9_0~0) (= (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) (= (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 17:43:39,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:43:39,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:43:39,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 7] total 17 [2023-12-02 17:43:39,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888392550] [2023-12-02 17:43:39,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:43:39,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 17:43:39,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:43:39,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 17:43:39,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1194, Invalid=17988, Unknown=0, NotChecked=0, Total=19182 [2023-12-02 17:43:39,840 INFO L87 Difference]: Start difference. First operand 30675 states and 53265 transitions. Second operand has 17 states, 17 states have (on average 15.117647058823529) internal successors, (257), 17 states have internal predecessors, (257), 10 states have call successors, (80), 4 states have call predecessors, (80), 6 states have return successors, (79), 10 states have call predecessors, (79), 9 states have call successors, (79) [2023-12-02 17:43:47,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:47,182 INFO L93 Difference]: Finished difference Result 83292 states and 179273 transitions. [2023-12-02 17:43:47,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 17:43:47,183 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 15.117647058823529) internal successors, (257), 17 states have internal predecessors, (257), 10 states have call successors, (80), 4 states have call predecessors, (80), 6 states have return successors, (79), 10 states have call predecessors, (79), 9 states have call successors, (79) Word has length 300 [2023-12-02 17:43:47,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:47,474 INFO L225 Difference]: With dead ends: 83292 [2023-12-02 17:43:47,474 INFO L226 Difference]: Without dead ends: 49807 [2023-12-02 17:43:47,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 948 GetRequests, 784 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 11241 ImplicationChecksByTransitivity, 168.2s TimeCoverageRelationStatistics Valid=1526, Invalid=25534, Unknown=0, NotChecked=0, Total=27060 [2023-12-02 17:43:47,619 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 2785 mSDsluCounter, 2345 mSDsCounter, 0 mSdLazyCounter, 5694 mSolverCounterSat, 1261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2793 SdHoareTripleChecker+Valid, 2734 SdHoareTripleChecker+Invalid, 6955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1261 IncrementalHoareTripleChecker+Valid, 5694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:47,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2793 Valid, 2734 Invalid, 6955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1261 Valid, 5694 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-12-02 17:43:47,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49807 states. [2023-12-02 17:43:50,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49807 to 43587. [2023-12-02 17:43:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43587 states, 32180 states have (on average 1.5189869484151648) internal successors, (48881), 33347 states have internal predecessors, (48881), 8622 states have call successors, (8622), 2418 states have call predecessors, (8622), 2784 states have return successors, (22175), 8106 states have call predecessors, (22175), 8617 states have call successors, (22175) [2023-12-02 17:43:51,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43587 states to 43587 states and 79678 transitions. [2023-12-02 17:43:51,058 INFO L78 Accepts]: Start accepts. Automaton has 43587 states and 79678 transitions. Word has length 300 [2023-12-02 17:43:51,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:51,059 INFO L495 AbstractCegarLoop]: Abstraction has 43587 states and 79678 transitions. [2023-12-02 17:43:51,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.117647058823529) internal successors, (257), 17 states have internal predecessors, (257), 10 states have call successors, (80), 4 states have call predecessors, (80), 6 states have return successors, (79), 10 states have call predecessors, (79), 9 states have call successors, (79) [2023-12-02 17:43:51,059 INFO L276 IsEmpty]: Start isEmpty. Operand 43587 states and 79678 transitions. [2023-12-02 17:43:51,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-12-02 17:43:51,075 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:51,075 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:43:51,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 17:43:51,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:43:51,276 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:51,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:51,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1258964589, now seen corresponding path program 1 times [2023-12-02 17:43:51,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:43:51,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052438224] [2023-12-02 17:43:51,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:51,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:43:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-12-02 17:43:52,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:43:52,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052438224] [2023-12-02 17:43:52,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052438224] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:43:52,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617913712] [2023-12-02 17:43:52,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:52,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:43:52,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:43:52,946 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:43:52,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 17:43:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:43:53,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 2190 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:43:53,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:43:53,332 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-12-02 17:43:53,332 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:43:53,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617913712] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:43:53,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:43:53,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [25] total 27 [2023-12-02 17:43:53,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676099722] [2023-12-02 17:43:53,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:43:53,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:43:53,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:43:53,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:43:53,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2023-12-02 17:43:53,334 INFO L87 Difference]: Start difference. First operand 43587 states and 79678 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2023-12-02 17:43:55,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:43:55,886 INFO L93 Difference]: Finished difference Result 88679 states and 170531 transitions. [2023-12-02 17:43:55,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:43:55,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 204 [2023-12-02 17:43:55,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:43:56,093 INFO L225 Difference]: With dead ends: 88679 [2023-12-02 17:43:56,093 INFO L226 Difference]: Without dead ends: 45135 [2023-12-02 17:43:56,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:43:56,427 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 205 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:43:56,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1419 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:43:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45135 states. [2023-12-02 17:43:58,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45135 to 45135. [2023-12-02 17:43:58,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45135 states, 33656 states have (on average 1.5309900166389352) internal successors, (51527), 34841 states have internal predecessors, (51527), 8622 states have call successors, (8622), 2472 states have call predecessors, (8622), 2856 states have return successors, (22175), 8106 states have call predecessors, (22175), 8617 states have call successors, (22175) [2023-12-02 17:43:59,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45135 states to 45135 states and 82324 transitions. [2023-12-02 17:43:59,128 INFO L78 Accepts]: Start accepts. Automaton has 45135 states and 82324 transitions. Word has length 204 [2023-12-02 17:43:59,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:43:59,128 INFO L495 AbstractCegarLoop]: Abstraction has 45135 states and 82324 transitions. [2023-12-02 17:43:59,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2023-12-02 17:43:59,129 INFO L276 IsEmpty]: Start isEmpty. Operand 45135 states and 82324 transitions. [2023-12-02 17:43:59,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-12-02 17:43:59,260 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:43:59,260 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:43:59,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-02 17:43:59,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:43:59,461 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:43:59,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:43:59,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1513578273, now seen corresponding path program 1 times [2023-12-02 17:43:59,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:43:59,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678641628] [2023-12-02 17:43:59,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:43:59,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:43:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:44:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-12-02 17:44:01,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:44:01,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678641628] [2023-12-02 17:44:01,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678641628] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:44:01,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313768286] [2023-12-02 17:44:01,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:44:01,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:44:01,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:44:01,010 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:44:01,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628b8452-fa7a-4c7e-a05f-97bf9c5e4bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 17:44:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:44:01,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 2191 conjuncts, 63 conjunts are in the unsatisfiable core [2023-12-02 17:44:01,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:44:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-12-02 17:44:02,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:44:06,598 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 9813 disjunctions. This might take some time... [2023-12-02 17:44:12,857 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 9813 disjunctions. [2023-12-02 17:44:13,201 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 9813 disjunctions. This might take some time... [2023-12-02 17:44:22,385 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 9813 disjunctions. [2023-12-02 17:44:22,667 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 9813 disjunctions. This might take some time... [2023-12-02 17:44:31,273 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 9813 disjunctions. [2023-12-02 17:44:31,369 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 49188 disjunctions. This might take some time... [2023-12-02 17:47:19,732 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 49188 disjunctions. [2023-12-02 17:47:20,133 WARN L176 XnfTransformerHelper]: Simplifying conjunction of 9813 disjunctions. This might take some time... [2023-12-02 17:47:30,850 INFO L192 XnfTransformerHelper]: Simplified to conjunction of 9813 disjunctions.