./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec2_product56.cil.c --full-output --architecture 32bit


--------------------------------------------------------------------------------


Checking for ERROR reachability
Using default analysis
Version 4fc63b2a
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aef99a8-0a32-4419-90bf-8b5394d50672/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aef99a8-0a32-4419-90bf-8b5394d50672/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aef99a8-0a32-4419-90bf-8b5394d50672/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aef99a8-0a32-4419-90bf-8b5394d50672/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec2_product56.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aef99a8-0a32-4419-90bf-8b5394d50672/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aef99a8-0a32-4419-90bf-8b5394d50672/bin/utaipan-verify-DbMuA5NWw2 --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 fa0eab3945757815cbe114f72b31b9c97b3f41e20a7d5f245c817ae82afdf9aa
--- Real Ultimate output ---
This is Ultimate 0.2.5-dev-4fc63b2
[2024-11-02 11:25:16,534 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2024-11-02 11:25:16,641 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aef99a8-0a32-4419-90bf-8b5394d50672/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf
[2024-11-02 11:25:16,648 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2024-11-02 11:25:16,649 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2024-11-02 11:25:16,684 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2024-11-02 11:25:16,684 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2024-11-02 11:25:16,685 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2024-11-02 11:25:16,685 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-11-02 11:25:16,686 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-11-02 11:25:16,686 INFO  L153        SettingsManager]:  * User list type=DISABLED
[2024-11-02 11:25:16,686 INFO  L151        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2024-11-02 11:25:16,688 INFO  L153        SettingsManager]:  * Explicit value domain=true
[2024-11-02 11:25:16,692 INFO  L153        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2024-11-02 11:25:16,693 INFO  L153        SettingsManager]:  * Octagon Domain=false
[2024-11-02 11:25:16,693 INFO  L153        SettingsManager]:  * Abstract domain=CompoundDomain
[2024-11-02 11:25:16,693 INFO  L153        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2024-11-02 11:25:16,694 INFO  L153        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2024-11-02 11:25:16,694 INFO  L153        SettingsManager]:  * Interval Domain=false
[2024-11-02 11:25:16,694 INFO  L151        SettingsManager]: Preferences of Sifa differ from their defaults:
[2024-11-02 11:25:16,695 INFO  L153        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2024-11-02 11:25:16,695 INFO  L153        SettingsManager]:  * Simplification Technique=POLY_PAC
[2024-11-02 11:25:16,697 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-11-02 11:25:16,698 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2024-11-02 11:25:16,698 INFO  L153        SettingsManager]:  * sizeof long=4
[2024-11-02 11:25:16,699 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2024-11-02 11:25:16,699 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2024-11-02 11:25:16,700 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2024-11-02 11:25:16,700 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2024-11-02 11:25:16,700 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-11-02 11:25:16,701 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2024-11-02 11:25:16,701 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2024-11-02 11:25:16,702 INFO  L153        SettingsManager]:  * sizeof long double=12
[2024-11-02 11:25:16,702 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2024-11-02 11:25:16,703 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2024-11-02 11:25:16,703 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-11-02 11:25:16,703 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2024-11-02 11:25:16,704 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2024-11-02 11:25:16,704 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2024-11-02 11:25:16,704 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-11-02 11:25:16,705 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2024-11-02 11:25:16,706 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2024-11-02 11:25:16,706 INFO  L153        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2024-11-02 11:25:16,707 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2024-11-02 11:25:16,707 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2024-11-02 11:25:16,708 INFO  L153        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2024-11-02 11:25:16,708 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2024-11-02 11:25:16,708 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_7aef99a8-0a32-4419-90bf-8b5394d50672/bin/utaipan-verify-DbMuA5NWw2/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_7aef99a8-0a32-4419-90bf-8b5394d50672/bin/utaipan-verify-DbMuA5NWw2
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 -> fa0eab3945757815cbe114f72b31b9c97b3f41e20a7d5f245c817ae82afdf9aa
[2024-11-02 11:25:17,020 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2024-11-02 11:25:17,049 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-11-02 11:25:17,052 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-11-02 11:25:17,055 INFO  L270        PluginConnector]: Initializing CDTParser...
[2024-11-02 11:25:17,055 INFO  L274        PluginConnector]: CDTParser initialized
[2024-11-02 11:25:17,057 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aef99a8-0a32-4419-90bf-8b5394d50672/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/product-lines/minepump_spec2_product56.cil.c
Unable to find full path for "g++"
[2024-11-02 11:25:19,376 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2024-11-02 11:25:19,729 INFO  L384              CDTParser]: Found 1 translation units.
[2024-11-02 11:25:19,729 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aef99a8-0a32-4419-90bf-8b5394d50672/sv-benchmarks/c/product-lines/minepump_spec2_product56.cil.c
[2024-11-02 11:25:19,746 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aef99a8-0a32-4419-90bf-8b5394d50672/bin/utaipan-verify-DbMuA5NWw2/data/adaa2734f/ebbc0e1ec36d4597883bd7fedd21c8ce/FLAGc00c98d69
[2024-11-02 11:25:19,959 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aef99a8-0a32-4419-90bf-8b5394d50672/bin/utaipan-verify-DbMuA5NWw2/data/adaa2734f/ebbc0e1ec36d4597883bd7fedd21c8ce
[2024-11-02 11:25:19,962 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-11-02 11:25:19,963 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2024-11-02 11:25:19,965 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-11-02 11:25:19,965 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-11-02 11:25:19,978 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2024-11-02 11:25:19,981 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:25:19" (1/1) ...
[2024-11-02 11:25:19,983 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@767f132f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:19, skipping insertion in model container
[2024-11-02 11:25:19,985 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:25:19" (1/1) ...
[2024-11-02 11:25:20,080 INFO  L175         MainTranslator]: Built tables and reachable declarations
[2024-11-02 11:25:20,504 WARN  L251   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_7aef99a8-0a32-4419-90bf-8b5394d50672/sv-benchmarks/c/product-lines/minepump_spec2_product56.cil.c[11292,11305]
[2024-11-02 11:25:20,605 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-02 11:25:20,626 INFO  L200         MainTranslator]: Completed pre-run
[2024-11-02 11:25:20,646 WARN  L75    lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"libacc.i","") [49]
[2024-11-02 11:25:20,656 WARN  L75    lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"wsllib_check.i","") [415]
[2024-11-02 11:25:20,656 WARN  L75    lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Environment.i","") [424]
[2024-11-02 11:25:20,657 WARN  L75    lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Specification2_spec.i","") [535]
[2024-11-02 11:25:20,657 WARN  L75    lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"MinePump.i","") [575]
[2024-11-02 11:25:20,657 WARN  L75    lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"scenario.i","") [827]
[2024-11-02 11:25:20,657 WARN  L75    lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"featureselect.i","") [897]
[2024-11-02 11:25:20,658 WARN  L75    lationResultReporter]: Unsoundness Warning: Ignoring preprocessor pragma C: #pragma merger(0,"Test.i","") [935]
[2024-11-02 11:25:20,784 WARN  L251   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_7aef99a8-0a32-4419-90bf-8b5394d50672/sv-benchmarks/c/product-lines/minepump_spec2_product56.cil.c[11292,11305]
[2024-11-02 11:25:20,837 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-02 11:25:20,872 INFO  L204         MainTranslator]: Completed translation
[2024-11-02 11:25:20,873 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:20 WrapperNode
[2024-11-02 11:25:20,873 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-11-02 11:25:20,874 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-11-02 11:25:20,875 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-11-02 11:25:20,875 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2024-11-02 11:25:20,883 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:20" (1/1) ...
[2024-11-02 11:25:20,910 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:20" (1/1) ...
[2024-11-02 11:25:20,963 INFO  L138                Inliner]: procedures = 59, calls = 106, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 232
[2024-11-02 11:25:20,964 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-11-02 11:25:20,965 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-11-02 11:25:20,965 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2024-11-02 11:25:20,967 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2024-11-02 11:25:20,978 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:20" (1/1) ...
[2024-11-02 11:25:20,978 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:20" (1/1) ...
[2024-11-02 11:25:20,985 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:20" (1/1) ...
[2024-11-02 11:25:20,985 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:20" (1/1) ...
[2024-11-02 11:25:20,995 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:20" (1/1) ...
[2024-11-02 11:25:21,004 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:20" (1/1) ...
[2024-11-02 11:25:21,009 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:20" (1/1) ...
[2024-11-02 11:25:21,011 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:20" (1/1) ...
[2024-11-02 11:25:21,014 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-11-02 11:25:21,019 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-11-02 11:25:21,019 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2024-11-02 11:25:21,019 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2024-11-02 11:25:21,024 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:20" (1/1) ...
[2024-11-02 11:25:21,034 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2024-11-02 11:25:21,060 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aef99a8-0a32-4419-90bf-8b5394d50672/bin/utaipan-verify-DbMuA5NWw2/z3
[2024-11-02 11:25:21,087 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aef99a8-0a32-4419-90bf-8b5394d50672/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2024-11-02 11:25:21,093 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aef99a8-0a32-4419-90bf-8b5394d50672/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2024-11-02 11:25:21,130 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-11-02 11:25:21,130 INFO  L130     BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base
[2024-11-02 11:25:21,130 INFO  L138     BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base
[2024-11-02 11:25:21,131 INFO  L130     BoogieDeclarations]: Found specification of procedure cleanup
[2024-11-02 11:25:21,131 INFO  L138     BoogieDeclarations]: Found implementation of procedure cleanup
[2024-11-02 11:25:21,131 INFO  L130     BoogieDeclarations]: Found specification of procedure timeShift
[2024-11-02 11:25:21,132 INFO  L138     BoogieDeclarations]: Found implementation of procedure timeShift
[2024-11-02 11:25:21,132 INFO  L130     BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical
[2024-11-02 11:25:21,132 INFO  L138     BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical
[2024-11-02 11:25:21,132 INFO  L130     BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor
[2024-11-02 11:25:21,132 INFO  L138     BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor
[2024-11-02 11:25:21,133 INFO  L130     BoogieDeclarations]: Found specification of procedure waterRise
[2024-11-02 11:25:21,133 INFO  L138     BoogieDeclarations]: Found implementation of procedure waterRise
[2024-11-02 11:25:21,133 INFO  L130     BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor
[2024-11-02 11:25:21,133 INFO  L138     BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor
[2024-11-02 11:25:21,133 INFO  L130     BoogieDeclarations]: Found specification of procedure deactivatePump
[2024-11-02 11:25:21,134 INFO  L138     BoogieDeclarations]: Found implementation of procedure deactivatePump
[2024-11-02 11:25:21,134 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2024-11-02 11:25:21,134 INFO  L130     BoogieDeclarations]: Found specification of procedure changeMethaneLevel
[2024-11-02 11:25:21,134 INFO  L138     BoogieDeclarations]: Found implementation of procedure changeMethaneLevel
[2024-11-02 11:25:21,134 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-11-02 11:25:21,135 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-11-02 11:25:21,223 INFO  L238             CfgBuilder]: Building ICFG
[2024-11-02 11:25:21,225 INFO  L264             CfgBuilder]: Building CFG for each procedure with an implementation
[2024-11-02 11:25:21,622 INFO  L?                        ?]: Removed 49 outVars from TransFormulas that were not future-live.
[2024-11-02 11:25:21,622 INFO  L287             CfgBuilder]: Performing block encoding
[2024-11-02 11:25:21,752 INFO  L311             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-11-02 11:25:21,752 INFO  L316             CfgBuilder]: Removed 2 assume(true) statements.
[2024-11-02 11:25:21,753 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:25:21 BoogieIcfgContainer
[2024-11-02 11:25:21,753 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-11-02 11:25:21,756 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-11-02 11:25:21,756 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2024-11-02 11:25:21,759 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2024-11-02 11:25:21,759 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:25:19" (1/3) ...
[2024-11-02 11:25:21,760 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3120c86b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:25:21, skipping insertion in model container
[2024-11-02 11:25:21,760 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:20" (2/3) ...
[2024-11-02 11:25:21,760 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3120c86b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:25:21, skipping insertion in model container
[2024-11-02 11:25:21,761 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:25:21" (3/3) ...
[2024-11-02 11:25:21,762 INFO  L112   eAbstractionObserver]: Analyzing ICFG minepump_spec2_product56.cil.c
[2024-11-02 11:25:21,776 INFO  L214   ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-11-02 11:25:21,776 INFO  L154   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2024-11-02 11:25:21,858 INFO  L332      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2024-11-02 11:25:21,864 INFO  L333      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, 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;@b0d6b60, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-11-02 11:25:21,865 INFO  L334      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-11-02 11:25:21,869 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 74 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 57 states have internal predecessors, (67), 17 states have call successors, (17), 9 states have call predecessors, (17), 9 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17)
[2024-11-02 11:25:21,893 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2024-11-02 11:25:21,893 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-02 11:25:21,894 INFO  L215           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-02 11:25:21,895 INFO  L396      AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-02 11:25:21,899 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-02 11:25:21,899 INFO  L85        PathProgramCache]: Analyzing trace with hash 118360060, now seen corresponding path program 1 times
[2024-11-02 11:25:21,909 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-02 11:25:21,909 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519377147]
[2024-11-02 11:25:21,910 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 11:25:21,910 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-02 11:25:22,022 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 11:25:22,093 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-02 11:25:22,093 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-02 11:25:22,094 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519377147]
[2024-11-02 11:25:22,095 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519377147] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-02 11:25:22,099 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-02 11:25:22,099 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2024-11-02 11:25:22,101 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871940775]
[2024-11-02 11:25:22,104 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-02 11:25:22,109 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2024-11-02 11:25:22,110 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-02 11:25:22,138 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2024-11-02 11:25:22,139 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2024-11-02 11:25:22,142 INFO  L87              Difference]: Start difference. First operand  has 74 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 57 states have internal predecessors, (67), 17 states have call successors, (17), 9 states have call predecessors, (17), 9 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) Second operand  has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2024-11-02 11:25:22,250 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-02 11:25:22,251 INFO  L93              Difference]: Finished difference Result 146 states and 203 transitions.
[2024-11-02 11:25:22,253 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2024-11-02 11:25:22,254 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17
[2024-11-02 11:25:22,255 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-02 11:25:22,266 INFO  L225             Difference]: With dead ends: 146
[2024-11-02 11:25:22,268 INFO  L226             Difference]: Without dead ends: 69
[2024-11-02 11:25:22,273 INFO  L431           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
[2024-11-02 11:25:22,279 INFO  L432           NwaCegarLoop]: 79 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-11-02 11:25:22,280 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 79 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-11-02 11:25:22,303 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 69 states.
[2024-11-02 11:25:22,336 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69.
[2024-11-02 11:25:22,340 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 69 states, 43 states have (on average 1.372093023255814) internal successors, (59), 53 states have internal predecessors, (59), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16)
[2024-11-02 11:25:22,342 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 92 transitions.
[2024-11-02 11:25:22,346 INFO  L78                 Accepts]: Start accepts. Automaton has 69 states and 92 transitions. Word has length 17
[2024-11-02 11:25:22,348 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-02 11:25:22,349 INFO  L471      AbstractCegarLoop]: Abstraction has 69 states and 92 transitions.
[2024-11-02 11:25:22,349 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2024-11-02 11:25:22,349 INFO  L276                IsEmpty]: Start isEmpty. Operand 69 states and 92 transitions.
[2024-11-02 11:25:22,351 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2024-11-02 11:25:22,352 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-02 11:25:22,352 INFO  L215           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-02 11:25:22,352 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2024-11-02 11:25:22,353 INFO  L396      AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-02 11:25:22,356 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-02 11:25:22,357 INFO  L85        PathProgramCache]: Analyzing trace with hash 152006802, now seen corresponding path program 1 times
[2024-11-02 11:25:22,357 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-02 11:25:22,358 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305049977]
[2024-11-02 11:25:22,358 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 11:25:22,358 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-02 11:25:22,382 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 11:25:22,474 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-02 11:25:22,474 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-02 11:25:22,475 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305049977]
[2024-11-02 11:25:22,475 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305049977] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-02 11:25:22,475 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-02 11:25:22,476 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2024-11-02 11:25:22,476 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723020794]
[2024-11-02 11:25:22,476 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-02 11:25:22,478 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2024-11-02 11:25:22,478 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-02 11:25:22,479 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2024-11-02 11:25:22,479 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-11-02 11:25:22,479 INFO  L87              Difference]: Start difference. First operand 69 states and 92 transitions. Second operand  has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2024-11-02 11:25:22,555 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-02 11:25:22,555 INFO  L93              Difference]: Finished difference Result 110 states and 146 transitions.
[2024-11-02 11:25:22,556 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2024-11-02 11:25:22,556 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18
[2024-11-02 11:25:22,556 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-02 11:25:22,557 INFO  L225             Difference]: With dead ends: 110
[2024-11-02 11:25:22,558 INFO  L226             Difference]: Without dead ends: 61
[2024-11-02 11:25:22,559 INFO  L431           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
[2024-11-02 11:25:22,560 INFO  L432           NwaCegarLoop]: 65 mSDtfsCounter, 14 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-11-02 11:25:22,561 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 114 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-11-02 11:25:22,562 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 61 states.
[2024-11-02 11:25:22,571 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61.
[2024-11-02 11:25:22,575 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 61 states, 38 states have (on average 1.394736842105263) internal successors, (53), 48 states have internal predecessors, (53), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14)
[2024-11-02 11:25:22,578 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions.
[2024-11-02 11:25:22,582 INFO  L78                 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 18
[2024-11-02 11:25:22,582 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-02 11:25:22,583 INFO  L471      AbstractCegarLoop]: Abstraction has 61 states and 81 transitions.
[2024-11-02 11:25:22,583 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2024-11-02 11:25:22,583 INFO  L276                IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions.
[2024-11-02 11:25:22,584 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2024-11-02 11:25:22,585 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-02 11:25:22,585 INFO  L215           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-02 11:25:22,585 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2024-11-02 11:25:22,586 INFO  L396      AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-02 11:25:22,586 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-02 11:25:22,586 INFO  L85        PathProgramCache]: Analyzing trace with hash -349927568, now seen corresponding path program 1 times
[2024-11-02 11:25:22,587 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-02 11:25:22,591 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620223778]
[2024-11-02 11:25:22,591 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 11:25:22,592 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-02 11:25:22,637 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 11:25:22,782 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-02 11:25:22,782 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-02 11:25:22,783 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620223778]
[2024-11-02 11:25:22,783 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620223778] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-02 11:25:22,783 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-02 11:25:22,783 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2024-11-02 11:25:22,784 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89434588]
[2024-11-02 11:25:22,784 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-02 11:25:22,784 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2024-11-02 11:25:22,785 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-02 11:25:22,790 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2024-11-02 11:25:22,790 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-11-02 11:25:22,790 INFO  L87              Difference]: Start difference. First operand 61 states and 81 transitions. Second operand  has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2024-11-02 11:25:22,920 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-02 11:25:22,920 INFO  L93              Difference]: Finished difference Result 179 states and 240 transitions.
[2024-11-02 11:25:22,924 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2024-11-02 11:25:22,925 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21
[2024-11-02 11:25:22,925 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-02 11:25:22,927 INFO  L225             Difference]: With dead ends: 179
[2024-11-02 11:25:22,927 INFO  L226             Difference]: Without dead ends: 120
[2024-11-02 11:25:22,928 INFO  L431           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
[2024-11-02 11:25:22,929 INFO  L432           NwaCegarLoop]: 76 mSDtfsCounter, 75 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-11-02 11:25:22,929 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 139 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-11-02 11:25:22,931 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 120 states.
[2024-11-02 11:25:22,951 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117.
[2024-11-02 11:25:22,951 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 117 states, 72 states have (on average 1.4027777777777777) internal successors, (101), 91 states have internal predecessors, (101), 28 states have call successors, (28), 16 states have call predecessors, (28), 16 states have return successors, (28), 17 states have call predecessors, (28), 28 states have call successors, (28)
[2024-11-02 11:25:22,953 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 157 transitions.
[2024-11-02 11:25:22,953 INFO  L78                 Accepts]: Start accepts. Automaton has 117 states and 157 transitions. Word has length 21
[2024-11-02 11:25:22,954 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-02 11:25:22,954 INFO  L471      AbstractCegarLoop]: Abstraction has 117 states and 157 transitions.
[2024-11-02 11:25:22,954 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2024-11-02 11:25:22,954 INFO  L276                IsEmpty]: Start isEmpty. Operand 117 states and 157 transitions.
[2024-11-02 11:25:22,956 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2024-11-02 11:25:22,956 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-02 11:25:22,956 INFO  L215           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]
[2024-11-02 11:25:22,956 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2024-11-02 11:25:22,957 INFO  L396      AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-02 11:25:22,957 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-02 11:25:22,957 INFO  L85        PathProgramCache]: Analyzing trace with hash -1018094825, now seen corresponding path program 1 times
[2024-11-02 11:25:22,957 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-02 11:25:22,958 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869699642]
[2024-11-02 11:25:22,958 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 11:25:22,958 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-02 11:25:22,974 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 11:25:23,113 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-02 11:25:23,113 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-02 11:25:23,113 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869699642]
[2024-11-02 11:25:23,114 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869699642] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-02 11:25:23,114 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-02 11:25:23,114 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2024-11-02 11:25:23,114 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14542890]
[2024-11-02 11:25:23,114 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-02 11:25:23,115 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2024-11-02 11:25:23,115 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-02 11:25:23,116 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2024-11-02 11:25:23,116 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2024-11-02 11:25:23,116 INFO  L87              Difference]: Start difference. First operand 117 states and 157 transitions. Second operand  has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2024-11-02 11:25:23,275 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-02 11:25:23,276 INFO  L93              Difference]: Finished difference Result 310 states and 427 transitions.
[2024-11-02 11:25:23,277 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2024-11-02 11:25:23,277 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24
[2024-11-02 11:25:23,278 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-02 11:25:23,281 INFO  L225             Difference]: With dead ends: 310
[2024-11-02 11:25:23,283 INFO  L226             Difference]: Without dead ends: 195
[2024-11-02 11:25:23,285 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2024-11-02 11:25:23,286 INFO  L432           NwaCegarLoop]: 67 mSDtfsCounter, 40 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-11-02 11:25:23,290 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 183 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-11-02 11:25:23,293 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 195 states.
[2024-11-02 11:25:23,339 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194.
[2024-11-02 11:25:23,343 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 194 states, 127 states have (on average 1.31496062992126) internal successors, (167), 144 states have internal predecessors, (167), 36 states have call successors, (36), 30 states have call predecessors, (36), 30 states have return successors, (48), 31 states have call predecessors, (48), 36 states have call successors, (48)
[2024-11-02 11:25:23,349 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 251 transitions.
[2024-11-02 11:25:23,349 INFO  L78                 Accepts]: Start accepts. Automaton has 194 states and 251 transitions. Word has length 24
[2024-11-02 11:25:23,350 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-02 11:25:23,350 INFO  L471      AbstractCegarLoop]: Abstraction has 194 states and 251 transitions.
[2024-11-02 11:25:23,350 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2024-11-02 11:25:23,350 INFO  L276                IsEmpty]: Start isEmpty. Operand 194 states and 251 transitions.
[2024-11-02 11:25:23,352 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2024-11-02 11:25:23,355 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-02 11:25:23,355 INFO  L215           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]
[2024-11-02 11:25:23,356 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2024-11-02 11:25:23,356 INFO  L396      AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-02 11:25:23,356 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-02 11:25:23,357 INFO  L85        PathProgramCache]: Analyzing trace with hash -564560772, now seen corresponding path program 1 times
[2024-11-02 11:25:23,357 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-02 11:25:23,357 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578272879]
[2024-11-02 11:25:23,357 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 11:25:23,357 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-02 11:25:23,388 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 11:25:23,800 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-02 11:25:23,801 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-02 11:25:23,801 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578272879]
[2024-11-02 11:25:23,801 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578272879] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-02 11:25:23,801 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-02 11:25:23,802 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2024-11-02 11:25:23,802 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195682674]
[2024-11-02 11:25:23,802 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-02 11:25:23,802 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2024-11-02 11:25:23,803 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-02 11:25:23,803 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2024-11-02 11:25:23,803 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2024-11-02 11:25:23,804 INFO  L87              Difference]: Start difference. First operand 194 states and 251 transitions. Second operand  has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2024-11-02 11:25:24,197 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-02 11:25:24,199 INFO  L93              Difference]: Finished difference Result 566 states and 732 transitions.
[2024-11-02 11:25:24,200 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2024-11-02 11:25:24,201 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34
[2024-11-02 11:25:24,201 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-02 11:25:24,206 INFO  L225             Difference]: With dead ends: 566
[2024-11-02 11:25:24,207 INFO  L226             Difference]: Without dead ends: 374
[2024-11-02 11:25:24,208 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90
[2024-11-02 11:25:24,209 INFO  L432           NwaCegarLoop]: 98 mSDtfsCounter, 129 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2024-11-02 11:25:24,210 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 411 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2024-11-02 11:25:24,211 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 374 states.
[2024-11-02 11:25:24,254 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 330.
[2024-11-02 11:25:24,255 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 330 states, 223 states have (on average 1.295964125560538) internal successors, (289), 243 states have internal predecessors, (289), 53 states have call successors, (53), 47 states have call predecessors, (53), 53 states have return successors, (71), 53 states have call predecessors, (71), 53 states have call successors, (71)
[2024-11-02 11:25:24,258 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 413 transitions.
[2024-11-02 11:25:24,259 INFO  L78                 Accepts]: Start accepts. Automaton has 330 states and 413 transitions. Word has length 34
[2024-11-02 11:25:24,259 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-02 11:25:24,259 INFO  L471      AbstractCegarLoop]: Abstraction has 330 states and 413 transitions.
[2024-11-02 11:25:24,260 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2024-11-02 11:25:24,260 INFO  L276                IsEmpty]: Start isEmpty. Operand 330 states and 413 transitions.
[2024-11-02 11:25:24,261 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2024-11-02 11:25:24,262 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-02 11:25:24,262 INFO  L215           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]
[2024-11-02 11:25:24,262 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2024-11-02 11:25:24,263 INFO  L396      AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-02 11:25:24,263 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-02 11:25:24,263 INFO  L85        PathProgramCache]: Analyzing trace with hash 1100133054, now seen corresponding path program 1 times
[2024-11-02 11:25:24,263 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-02 11:25:24,264 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92466435]
[2024-11-02 11:25:24,264 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 11:25:24,264 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-02 11:25:24,285 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 11:25:24,351 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-02 11:25:24,353 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-02 11:25:24,353 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92466435]
[2024-11-02 11:25:24,353 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92466435] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-02 11:25:24,353 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-02 11:25:24,354 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2024-11-02 11:25:24,354 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970396365]
[2024-11-02 11:25:24,354 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-02 11:25:24,354 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2024-11-02 11:25:24,354 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-02 11:25:24,355 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2024-11-02 11:25:24,355 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-11-02 11:25:24,355 INFO  L87              Difference]: Start difference. First operand 330 states and 413 transitions. Second operand  has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2024-11-02 11:25:24,476 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-02 11:25:24,477 INFO  L93              Difference]: Finished difference Result 541 states and 699 transitions.
[2024-11-02 11:25:24,477 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2024-11-02 11:25:24,477 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37
[2024-11-02 11:25:24,478 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-02 11:25:24,486 INFO  L225             Difference]: With dead ends: 541
[2024-11-02 11:25:24,486 INFO  L226             Difference]: Without dead ends: 539
[2024-11-02 11:25:24,487 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-11-02 11:25:24,488 INFO  L432           NwaCegarLoop]: 65 mSDtfsCounter, 56 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-11-02 11:25:24,488 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 126 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-11-02 11:25:24,490 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 539 states.
[2024-11-02 11:25:24,564 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 523.
[2024-11-02 11:25:24,565 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 523 states, 349 states have (on average 1.3065902578796562) internal successors, (456), 384 states have internal predecessors, (456), 87 states have call successors, (87), 75 states have call predecessors, (87), 86 states have return successors, (133), 84 states have call predecessors, (133), 87 states have call successors, (133)
[2024-11-02 11:25:24,569 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 676 transitions.
[2024-11-02 11:25:24,570 INFO  L78                 Accepts]: Start accepts. Automaton has 523 states and 676 transitions. Word has length 37
[2024-11-02 11:25:24,570 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-02 11:25:24,570 INFO  L471      AbstractCegarLoop]: Abstraction has 523 states and 676 transitions.
[2024-11-02 11:25:24,571 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2024-11-02 11:25:24,571 INFO  L276                IsEmpty]: Start isEmpty. Operand 523 states and 676 transitions.
[2024-11-02 11:25:24,574 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 62
[2024-11-02 11:25:24,574 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-02 11:25:24,574 INFO  L215           NwaCegarLoop]: trace histogram [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]
[2024-11-02 11:25:24,574 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2024-11-02 11:25:24,575 INFO  L396      AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-02 11:25:24,575 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-02 11:25:24,575 INFO  L85        PathProgramCache]: Analyzing trace with hash -1628119915, now seen corresponding path program 1 times
[2024-11-02 11:25:24,575 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-02 11:25:24,575 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322277780]
[2024-11-02 11:25:24,575 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 11:25:24,576 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-02 11:25:24,590 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 11:25:24,632 INFO  L134       CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2024-11-02 11:25:24,633 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-02 11:25:24,633 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322277780]
[2024-11-02 11:25:24,633 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322277780] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-02 11:25:24,633 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-02 11:25:24,633 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2024-11-02 11:25:24,633 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344434688]
[2024-11-02 11:25:24,633 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-02 11:25:24,634 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2024-11-02 11:25:24,634 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-02 11:25:24,634 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2024-11-02 11:25:24,634 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2024-11-02 11:25:24,635 INFO  L87              Difference]: Start difference. First operand 523 states and 676 transitions. Second operand  has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6)
[2024-11-02 11:25:24,842 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-02 11:25:24,842 INFO  L93              Difference]: Finished difference Result 845 states and 1092 transitions.
[2024-11-02 11:25:24,842 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2024-11-02 11:25:24,843 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 61
[2024-11-02 11:25:24,843 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-02 11:25:24,845 INFO  L225             Difference]: With dead ends: 845
[2024-11-02 11:25:24,846 INFO  L226             Difference]: Without dead ends: 324
[2024-11-02 11:25:24,847 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2024-11-02 11:25:24,848 INFO  L432           NwaCegarLoop]: 86 mSDtfsCounter, 97 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2024-11-02 11:25:24,849 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 136 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2024-11-02 11:25:24,849 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 324 states.
[2024-11-02 11:25:24,892 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 312.
[2024-11-02 11:25:24,893 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 312 states, 211 states have (on average 1.2890995260663507) internal successors, (272), 232 states have internal predecessors, (272), 50 states have call successors, (50), 44 states have call predecessors, (50), 50 states have return successors, (72), 49 states have call predecessors, (72), 50 states have call successors, (72)
[2024-11-02 11:25:24,897 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 394 transitions.
[2024-11-02 11:25:24,898 INFO  L78                 Accepts]: Start accepts. Automaton has 312 states and 394 transitions. Word has length 61
[2024-11-02 11:25:24,898 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-02 11:25:24,899 INFO  L471      AbstractCegarLoop]: Abstraction has 312 states and 394 transitions.
[2024-11-02 11:25:24,899 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 4 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6)
[2024-11-02 11:25:24,899 INFO  L276                IsEmpty]: Start isEmpty. Operand 312 states and 394 transitions.
[2024-11-02 11:25:24,901 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 76
[2024-11-02 11:25:24,901 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-02 11:25:24,902 INFO  L215           NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-02 11:25:24,902 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2024-11-02 11:25:24,902 INFO  L396      AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-02 11:25:24,902 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-02 11:25:24,903 INFO  L85        PathProgramCache]: Analyzing trace with hash 1777925345, now seen corresponding path program 1 times
[2024-11-02 11:25:24,905 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-02 11:25:24,905 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405253300]
[2024-11-02 11:25:24,905 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 11:25:24,905 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-02 11:25:24,933 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 11:25:25,090 INFO  L134       CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked.
[2024-11-02 11:25:25,090 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-02 11:25:25,090 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405253300]
[2024-11-02 11:25:25,090 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405253300] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-02 11:25:25,091 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12044549]
[2024-11-02 11:25:25,091 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-02 11:25:25,091 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-02 11:25:25,091 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aef99a8-0a32-4419-90bf-8b5394d50672/bin/utaipan-verify-DbMuA5NWw2/z3
[2024-11-02 11:25:25,093 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aef99a8-0a32-4419-90bf-8b5394d50672/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-11-02 11:25:25,096 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aef99a8-0a32-4419-90bf-8b5394d50672/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2024-11-02 11:25:25,216 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-02 11:25:25,218 INFO  L255         TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 6 conjuncts are in the unsatisfiable core
[2024-11-02 11:25:25,225 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-02 11:25:25,419 INFO  L134       CoverageAnalysis]: Checked inductivity of 34 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2024-11-02 11:25:25,419 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-02 11:25:25,677 INFO  L134       CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked.
[2024-11-02 11:25:25,678 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [12044549] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-02 11:25:25,678 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [880382176]
[2024-11-02 11:25:25,704 INFO  L159        IcfgInterpreter]: Started Sifa with 44 locations of interest
[2024-11-02 11:25:25,704 INFO  L166        IcfgInterpreter]: Building call graph
[2024-11-02 11:25:25,709 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2024-11-02 11:25:25,732 INFO  L176        IcfgInterpreter]: Starting interpretation
[2024-11-02 11:25:25,732 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2024-11-02 11:25:29,961 INFO  L197        IcfgInterpreter]: Interpreting procedure waterRise with input of size 133 for LOIs
[2024-11-02 11:25:30,115 INFO  L197        IcfgInterpreter]: Interpreting procedure timeShift with input of size 146 for LOIs
[2024-11-02 11:25:32,555 INFO  L197        IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__lowWaterSensor with input of size 142 for LOIs
[2024-11-02 11:25:33,544 INFO  L197        IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 142 for LOIs
[2024-11-02 11:25:33,898 INFO  L197        IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 128 for LOIs
[2024-11-02 11:25:33,937 INFO  L180        IcfgInterpreter]: Interpretation finished
[2024-11-02 11:25:45,161 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSifa [880382176] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-02 11:25:45,161 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences.
[2024-11-02 11:25:45,161 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [9, 5, 5] total 31
[2024-11-02 11:25:45,163 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981404604]
[2024-11-02 11:25:45,164 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-02 11:25:45,164 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 20 states
[2024-11-02 11:25:45,164 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-02 11:25:45,165 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2024-11-02 11:25:45,165 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930
[2024-11-02 11:25:45,166 INFO  L87              Difference]: Start difference. First operand 312 states and 394 transitions. Second operand  has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7)