./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 0e0057cc
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_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/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_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/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_13646ade-23d9-4c3a-9663-c682cc36cab5/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 5202e6cfdb0072b2d97423b078e60556fe6d43d8002548ceef037df7f02499eb
--- Real Ultimate output ---
This is Ultimate 0.2.4-dev-0e0057c
[2023-12-02 14:04:03,146 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-12-02 14:04:03,219 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf
[2023-12-02 14:04:03,224 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-12-02 14:04:03,225 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-12-02 14:04:03,252 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-12-02 14:04:03,252 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-12-02 14:04:03,253 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-12-02 14:04:03,254 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-12-02 14:04:03,254 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-12-02 14:04:03,255 INFO  L153        SettingsManager]:  * User list type=DISABLED
[2023-12-02 14:04:03,255 INFO  L151        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-12-02 14:04:03,256 INFO  L153        SettingsManager]:  * Explicit value domain=true
[2023-12-02 14:04:03,256 INFO  L153        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-12-02 14:04:03,257 INFO  L153        SettingsManager]:  * Octagon Domain=false
[2023-12-02 14:04:03,258 INFO  L153        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-12-02 14:04:03,258 INFO  L153        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-12-02 14:04:03,259 INFO  L153        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-12-02 14:04:03,259 INFO  L153        SettingsManager]:  * Interval Domain=false
[2023-12-02 14:04:03,260 INFO  L151        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-12-02 14:04:03,260 INFO  L153        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-12-02 14:04:03,261 INFO  L153        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-12-02 14:04:03,262 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-12-02 14:04:03,262 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-12-02 14:04:03,263 INFO  L153        SettingsManager]:  * sizeof long=4
[2023-12-02 14:04:03,263 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-12-02 14:04:03,264 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2023-12-02 14:04:03,264 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-12-02 14:04:03,265 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-12-02 14:04:03,265 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-12-02 14:04:03,265 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-12-02 14:04:03,266 INFO  L153        SettingsManager]:  * sizeof long double=12
[2023-12-02 14:04:03,266 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-12-02 14:04:03,266 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-12-02 14:04:03,267 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-12-02 14:04:03,267 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-12-02 14:04:03,267 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-12-02 14:04:03,267 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-12-02 14:04:03,268 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-12-02 14:04:03,268 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-12-02 14:04:03,268 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-12-02 14:04:03,269 INFO  L153        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-12-02 14:04:03,269 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-12-02 14:04:03,269 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-12-02 14:04:03,269 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-12-02 14:04:03,269 INFO  L153        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-12-02 14:04:03,270 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-12-02 14:04:03,270 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_13646ade-23d9-4c3a-9663-c682cc36cab5/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_13646ade-23d9-4c3a-9663-c682cc36cab5/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 -> 5202e6cfdb0072b2d97423b078e60556fe6d43d8002548ceef037df7f02499eb
[2023-12-02 14:04:03,516 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-12-02 14:04:03,536 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-12-02 14:04:03,539 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-12-02 14:04:03,540 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-12-02 14:04:03,541 INFO  L274        PluginConnector]: CDTParser initialized
[2023-12-02 14:04:03,542 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c
[2023-12-02 14:04:06,267 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-12-02 14:04:06,490 INFO  L384              CDTParser]: Found 1 translation units.
[2023-12-02 14:04:06,490 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c
[2023-12-02 14:04:06,507 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/data/b20ec6697/cf02e9f826af46469c33c6f5817da7c4/FLAG8cd48db71
[2023-12-02 14:04:06,520 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/data/b20ec6697/cf02e9f826af46469c33c6f5817da7c4
[2023-12-02 14:04:06,523 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-12-02 14:04:06,525 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-12-02 14:04:06,526 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-12-02 14:04:06,527 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-12-02 14:04:06,532 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-12-02 14:04:06,533 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:04:06" (1/1) ...
[2023-12-02 14:04:06,534 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fb1ad6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:04:06, skipping insertion in model container
[2023-12-02 14:04:06,535 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:04:06" (1/1) ...
[2023-12-02 14:04:06,609 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-12-02 14:04:06,769 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_13646ade-23d9-4c3a-9663-c682cc36cab5/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c[911,924]
[2023-12-02 14:04:06,837 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_13646ade-23d9-4c3a-9663-c682cc36cab5/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c[8416,8429]
[2023-12-02 14:04:06,921 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-12-02 14:04:06,935 INFO  L202         MainTranslator]: Completed pre-run
[2023-12-02 14:04:06,949 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_13646ade-23d9-4c3a-9663-c682cc36cab5/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c[911,924]
[2023-12-02 14:04:06,969 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_13646ade-23d9-4c3a-9663-c682cc36cab5/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.08.cil-1.c[8416,8429]
[2023-12-02 14:04:07,011 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-12-02 14:04:07,038 INFO  L206         MainTranslator]: Completed translation
[2023-12-02 14:04:07,039 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:04:07 WrapperNode
[2023-12-02 14:04:07,039 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-12-02 14:04:07,040 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-12-02 14:04:07,040 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-12-02 14:04:07,040 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-12-02 14:04:07,048 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:04:07" (1/1) ...
[2023-12-02 14:04:07,065 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:04:07" (1/1) ...
[2023-12-02 14:04:07,115 INFO  L138                Inliner]: procedures = 71, calls = 85, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 868
[2023-12-02 14:04:07,116 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-12-02 14:04:07,116 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-12-02 14:04:07,117 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-12-02 14:04:07,117 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-12-02 14:04:07,126 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:04:07" (1/1) ...
[2023-12-02 14:04:07,127 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:04:07" (1/1) ...
[2023-12-02 14:04:07,132 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:04:07" (1/1) ...
[2023-12-02 14:04:07,132 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:04:07" (1/1) ...
[2023-12-02 14:04:07,148 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:04:07" (1/1) ...
[2023-12-02 14:04:07,161 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:04:07" (1/1) ...
[2023-12-02 14:04:07,164 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:04:07" (1/1) ...
[2023-12-02 14:04:07,169 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:04:07" (1/1) ...
[2023-12-02 14:04:07,175 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-12-02 14:04:07,177 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-12-02 14:04:07,177 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-12-02 14:04:07,177 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-12-02 14:04:07,178 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:04:07" (1/1) ...
[2023-12-02 14:04:07,200 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-12-02 14:04:07,212 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3
[2023-12-02 14:04:07,225 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-12-02 14:04:07,227 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-12-02 14:04:07,264 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-12-02 14:04:07,264 INFO  L130     BoogieDeclarations]: Found specification of procedure immediate_notify
[2023-12-02 14:04:07,264 INFO  L138     BoogieDeclarations]: Found implementation of procedure immediate_notify
[2023-12-02 14:04:07,264 INFO  L130     BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered
[2023-12-02 14:04:07,265 INFO  L138     BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered
[2023-12-02 14:04:07,265 INFO  L130     BoogieDeclarations]: Found specification of procedure exists_runnable_thread1
[2023-12-02 14:04:07,265 INFO  L138     BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1
[2023-12-02 14:04:07,265 INFO  L130     BoogieDeclarations]: Found specification of procedure exists_runnable_thread2
[2023-12-02 14:04:07,265 INFO  L138     BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2
[2023-12-02 14:04:07,265 INFO  L130     BoogieDeclarations]: Found specification of procedure reset_delta_events1
[2023-12-02 14:04:07,265 INFO  L138     BoogieDeclarations]: Found implementation of procedure reset_delta_events1
[2023-12-02 14:04:07,265 INFO  L130     BoogieDeclarations]: Found specification of procedure reset_delta_events2
[2023-12-02 14:04:07,266 INFO  L138     BoogieDeclarations]: Found implementation of procedure reset_delta_events2
[2023-12-02 14:04:07,266 INFO  L130     BoogieDeclarations]: Found specification of procedure activate_threads2
[2023-12-02 14:04:07,266 INFO  L138     BoogieDeclarations]: Found implementation of procedure activate_threads2
[2023-12-02 14:04:07,266 INFO  L130     BoogieDeclarations]: Found specification of procedure activate_threads1
[2023-12-02 14:04:07,266 INFO  L138     BoogieDeclarations]: Found implementation of procedure activate_threads1
[2023-12-02 14:04:07,266 INFO  L130     BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered
[2023-12-02 14:04:07,266 INFO  L138     BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered
[2023-12-02 14:04:07,267 INFO  L130     BoogieDeclarations]: Found specification of procedure update_channels1
[2023-12-02 14:04:07,267 INFO  L138     BoogieDeclarations]: Found implementation of procedure update_channels1
[2023-12-02 14:04:07,267 INFO  L130     BoogieDeclarations]: Found specification of procedure update_channels2
[2023-12-02 14:04:07,267 INFO  L138     BoogieDeclarations]: Found implementation of procedure update_channels2
[2023-12-02 14:04:07,267 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-12-02 14:04:07,267 INFO  L130     BoogieDeclarations]: Found specification of procedure fire_delta_events2
[2023-12-02 14:04:07,267 INFO  L138     BoogieDeclarations]: Found implementation of procedure fire_delta_events2
[2023-12-02 14:04:07,267 INFO  L130     BoogieDeclarations]: Found specification of procedure fire_delta_events1
[2023-12-02 14:04:07,268 INFO  L138     BoogieDeclarations]: Found implementation of procedure fire_delta_events1
[2023-12-02 14:04:07,268 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-12-02 14:04:07,268 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-12-02 14:04:07,268 INFO  L130     BoogieDeclarations]: Found specification of procedure error1
[2023-12-02 14:04:07,268 INFO  L138     BoogieDeclarations]: Found implementation of procedure error1
[2023-12-02 14:04:07,382 INFO  L241             CfgBuilder]: Building ICFG
[2023-12-02 14:04:07,384 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-12-02 14:04:08,004 INFO  L775   $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0);
[2023-12-02 14:04:08,004 INFO  L775   $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1;
[2023-12-02 14:04:08,078 INFO  L282             CfgBuilder]: Performing block encoding
[2023-12-02 14:04:08,580 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-12-02 14:04:08,580 INFO  L309             CfgBuilder]: Removed 15 assume(true) statements.
[2023-12-02 14:04:08,582 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:04:08 BoogieIcfgContainer
[2023-12-02 14:04:08,583 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-12-02 14:04:08,586 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-12-02 14:04:08,586 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-12-02 14:04:08,590 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-12-02 14:04:08,590 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:04:06" (1/3) ...
[2023-12-02 14:04:08,591 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3755a504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:04:08, skipping insertion in model container
[2023-12-02 14:04:08,591 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:04:07" (2/3) ...
[2023-12-02 14:04:08,592 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3755a504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:04:08, skipping insertion in model container
[2023-12-02 14:04:08,593 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:04:08" (3/3) ...
[2023-12-02 14:04:08,594 INFO  L112   eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.08.cil-1.c
[2023-12-02 14:04:08,616 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-12-02 14:04:08,616 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations.
[2023-12-02 14:04:08,674 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-12-02 14:04:08,681 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;@255507a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-12-02 14:04:08,681 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 2 error locations.
[2023-12-02 14:04:08,687 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 232 states, 177 states have (on average 1.502824858757062) internal successors, (266), 183 states have internal predecessors, (266), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38)
[2023-12-02 14:04:08,697 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2023-12-02 14:04:08,698 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 14:04:08,698 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 14:04:08,699 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 14:04:08,704 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 14:04:08,704 INFO  L85        PathProgramCache]: Analyzing trace with hash 1001265170, now seen corresponding path program 1 times
[2023-12-02 14:04:08,714 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 14:04:08,714 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879986695]
[2023-12-02 14:04:08,715 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:04:08,715 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 14:04:08,838 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:04:09,009 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 14:04:09,010 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 14:04:09,010 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879986695]
[2023-12-02 14:04:09,011 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879986695] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 14:04:09,011 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 14:04:09,011 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-12-02 14:04:09,012 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439300981]
[2023-12-02 14:04:09,013 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 14:04:09,017 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-12-02 14:04:09,018 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 14:04:09,045 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-12-02 14:04:09,046 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-12-02 14:04:09,049 INFO  L87              Difference]: Start difference. First operand  has 232 states, 177 states have (on average 1.502824858757062) internal successors, (266), 183 states have internal predecessors, (266), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) Second operand  has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7)
[2023-12-02 14:04:09,466 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 14:04:09,466 INFO  L93              Difference]: Finished difference Result 587 states and 862 transitions.
[2023-12-02 14:04:09,467 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-12-02 14:04:09,469 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44
[2023-12-02 14:04:09,469 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 14:04:09,481 INFO  L225             Difference]: With dead ends: 587
[2023-12-02 14:04:09,482 INFO  L226             Difference]: Without dead ends: 356
[2023-12-02 14:04:09,487 INFO  L412           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
[2023-12-02 14:04:09,491 INFO  L413           NwaCegarLoop]: 334 mSDtfsCounter, 393 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2023-12-02 14:04:09,492 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 589 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2023-12-02 14:04:09,506 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 356 states.
[2023-12-02 14:04:09,551 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 345.
[2023-12-02 14:04:09,553 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 345 states, 258 states have (on average 1.4186046511627908) internal successors, (366), 262 states have internal predecessors, (366), 58 states have call successors, (58), 28 states have call predecessors, (58), 27 states have return successors, (59), 56 states have call predecessors, (59), 56 states have call successors, (59)
[2023-12-02 14:04:09,556 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 483 transitions.
[2023-12-02 14:04:09,557 INFO  L78                 Accepts]: Start accepts. Automaton has 345 states and 483 transitions. Word has length 44
[2023-12-02 14:04:09,557 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 14:04:09,558 INFO  L495      AbstractCegarLoop]: Abstraction has 345 states and 483 transitions.
[2023-12-02 14:04:09,558 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7)
[2023-12-02 14:04:09,558 INFO  L276                IsEmpty]: Start isEmpty. Operand 345 states and 483 transitions.
[2023-12-02 14:04:09,575 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 46
[2023-12-02 14:04:09,575 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 14:04:09,575 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-12-02 14:04:09,576 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-12-02 14:04:09,576 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 14:04:09,577 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 14:04:09,577 INFO  L85        PathProgramCache]: Analyzing trace with hash 1429438497, now seen corresponding path program 1 times
[2023-12-02 14:04:09,577 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 14:04:09,577 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579366500]
[2023-12-02 14:04:09,577 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:04:09,578 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 14:04:09,602 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:04:09,700 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 14:04:09,700 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 14:04:09,700 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579366500]
[2023-12-02 14:04:09,701 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579366500] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 14:04:09,701 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 14:04:09,701 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-12-02 14:04:09,701 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254721326]
[2023-12-02 14:04:09,701 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 14:04:09,703 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-12-02 14:04:09,703 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 14:04:09,703 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-12-02 14:04:09,704 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2023-12-02 14:04:09,704 INFO  L87              Difference]: Start difference. First operand 345 states and 483 transitions. Second operand  has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7)
[2023-12-02 14:04:10,521 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 14:04:10,521 INFO  L93              Difference]: Finished difference Result 882 states and 1206 transitions.
[2023-12-02 14:04:10,522 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-12-02 14:04:10,522 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45
[2023-12-02 14:04:10,522 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 14:04:10,526 INFO  L225             Difference]: With dead ends: 882
[2023-12-02 14:04:10,527 INFO  L226             Difference]: Without dead ends: 416
[2023-12-02 14:04:10,529 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72
[2023-12-02 14:04:10,530 INFO  L413           NwaCegarLoop]: 382 mSDtfsCounter, 864 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-12-02 14:04:10,531 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 990 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-12-02 14:04:10,532 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 416 states.
[2023-12-02 14:04:10,564 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 331.
[2023-12-02 14:04:10,565 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 331 states, 244 states have (on average 1.3647540983606556) internal successors, (333), 248 states have internal predecessors, (333), 58 states have call successors, (58), 28 states have call predecessors, (58), 27 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56)
[2023-12-02 14:04:10,568 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 447 transitions.
[2023-12-02 14:04:10,568 INFO  L78                 Accepts]: Start accepts. Automaton has 331 states and 447 transitions. Word has length 45
[2023-12-02 14:04:10,569 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 14:04:10,569 INFO  L495      AbstractCegarLoop]: Abstraction has 331 states and 447 transitions.
[2023-12-02 14:04:10,569 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7)
[2023-12-02 14:04:10,582 INFO  L276                IsEmpty]: Start isEmpty. Operand 331 states and 447 transitions.
[2023-12-02 14:04:10,585 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2023-12-02 14:04:10,585 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 14:04:10,586 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-12-02 14:04:10,586 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-12-02 14:04:10,586 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 14:04:10,587 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 14:04:10,587 INFO  L85        PathProgramCache]: Analyzing trace with hash 1625733716, now seen corresponding path program 1 times
[2023-12-02 14:04:10,587 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 14:04:10,587 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406643262]
[2023-12-02 14:04:10,587 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:04:10,588 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 14:04:10,606 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:04:10,688 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 14:04:10,688 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 14:04:10,688 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406643262]
[2023-12-02 14:04:10,688 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406643262] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 14:04:10,688 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 14:04:10,689 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2023-12-02 14:04:10,689 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013256329]
[2023-12-02 14:04:10,689 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 14:04:10,689 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-12-02 14:04:10,690 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 14:04:10,690 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-12-02 14:04:10,690 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2023-12-02 14:04:10,691 INFO  L87              Difference]: Start difference. First operand 331 states and 447 transitions. Second operand  has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7)
[2023-12-02 14:04:11,372 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 14:04:11,373 INFO  L93              Difference]: Finished difference Result 797 states and 1055 transitions.
[2023-12-02 14:04:11,373 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-12-02 14:04:11,373 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46
[2023-12-02 14:04:11,374 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 14:04:11,378 INFO  L225             Difference]: With dead ends: 797
[2023-12-02 14:04:11,379 INFO  L226             Difference]: Without dead ends: 620
[2023-12-02 14:04:11,380 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72
[2023-12-02 14:04:11,381 INFO  L413           NwaCegarLoop]: 377 mSDtfsCounter, 771 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-12-02 14:04:11,382 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 952 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-12-02 14:04:11,383 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 620 states.
[2023-12-02 14:04:11,420 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 595.
[2023-12-02 14:04:11,421 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 595 states, 425 states have (on average 1.2988235294117647) internal successors, (552), 429 states have internal predecessors, (552), 107 states have call successors, (107), 62 states have call predecessors, (107), 61 states have return successors, (122), 105 states have call predecessors, (122), 105 states have call successors, (122)
[2023-12-02 14:04:11,425 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 781 transitions.
[2023-12-02 14:04:11,425 INFO  L78                 Accepts]: Start accepts. Automaton has 595 states and 781 transitions. Word has length 46
[2023-12-02 14:04:11,425 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 14:04:11,425 INFO  L495      AbstractCegarLoop]: Abstraction has 595 states and 781 transitions.
[2023-12-02 14:04:11,426 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7)
[2023-12-02 14:04:11,426 INFO  L276                IsEmpty]: Start isEmpty. Operand 595 states and 781 transitions.
[2023-12-02 14:04:11,428 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 51
[2023-12-02 14:04:11,428 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 14:04:11,428 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-12-02 14:04:11,428 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-12-02 14:04:11,429 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 14:04:11,429 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 14:04:11,429 INFO  L85        PathProgramCache]: Analyzing trace with hash -1276967446, now seen corresponding path program 1 times
[2023-12-02 14:04:11,429 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 14:04:11,430 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807698045]
[2023-12-02 14:04:11,430 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:04:11,430 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 14:04:11,458 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:04:11,492 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 14:04:11,492 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 14:04:11,492 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807698045]
[2023-12-02 14:04:11,492 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807698045] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 14:04:11,492 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 14:04:11,493 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-12-02 14:04:11,493 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785401541]
[2023-12-02 14:04:11,493 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 14:04:11,493 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 14:04:11,494 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 14:04:11,494 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 14:04:11,494 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 14:04:11,495 INFO  L87              Difference]: Start difference. First operand 595 states and 781 transitions. Second operand  has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)
[2023-12-02 14:04:11,589 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 14:04:11,590 INFO  L93              Difference]: Finished difference Result 596 states and 782 transitions.
[2023-12-02 14:04:11,590 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 14:04:11,590 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50
[2023-12-02 14:04:11,591 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 14:04:11,592 INFO  L225             Difference]: With dead ends: 596
[2023-12-02 14:04:11,592 INFO  L226             Difference]: Without dead ends: 152
[2023-12-02 14:04:11,594 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 14:04:11,595 INFO  L413           NwaCegarLoop]: 257 mSDtfsCounter, 291 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-12-02 14:04:11,596 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 257 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-12-02 14:04:11,597 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 152 states.
[2023-12-02 14:04:11,605 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152.
[2023-12-02 14:04:11,605 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 152 states, 123 states have (on average 1.4634146341463414) internal successors, (180), 124 states have internal predecessors, (180), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22)
[2023-12-02 14:04:11,606 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 224 transitions.
[2023-12-02 14:04:11,607 INFO  L78                 Accepts]: Start accepts. Automaton has 152 states and 224 transitions. Word has length 50
[2023-12-02 14:04:11,607 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 14:04:11,607 INFO  L495      AbstractCegarLoop]: Abstraction has 152 states and 224 transitions.
[2023-12-02 14:04:11,607 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)
[2023-12-02 14:04:11,608 INFO  L276                IsEmpty]: Start isEmpty. Operand 152 states and 224 transitions.
[2023-12-02 14:04:11,609 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2023-12-02 14:04:11,609 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 14:04:11,609 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-12-02 14:04:11,610 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-12-02 14:04:11,610 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 14:04:11,610 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 14:04:11,610 INFO  L85        PathProgramCache]: Analyzing trace with hash -1466771454, now seen corresponding path program 1 times
[2023-12-02 14:04:11,611 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 14:04:11,611 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906334147]
[2023-12-02 14:04:11,611 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:04:11,611 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 14:04:11,632 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:04:11,719 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 14:04:11,719 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 14:04:11,720 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906334147]
[2023-12-02 14:04:11,720 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906334147] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 14:04:11,720 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 14:04:11,720 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-12-02 14:04:11,721 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301899319]
[2023-12-02 14:04:11,721 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 14:04:11,721 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-12-02 14:04:11,722 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 14:04:11,722 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-12-02 14:04:11,723 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-12-02 14:04:11,723 INFO  L87              Difference]: Start difference. First operand 152 states and 224 transitions. Second operand  has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2023-12-02 14:04:12,384 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 14:04:12,384 INFO  L93              Difference]: Finished difference Result 855 states and 1340 transitions.
[2023-12-02 14:04:12,384 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-12-02 14:04:12,385 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55
[2023-12-02 14:04:12,385 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 14:04:12,390 INFO  L225             Difference]: With dead ends: 855
[2023-12-02 14:04:12,391 INFO  L226             Difference]: Without dead ends: 709
[2023-12-02 14:04:12,392 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 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 14:04:12,393 INFO  L413           NwaCegarLoop]: 343 mSDtfsCounter, 998 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-12-02 14:04:12,394 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1000 Valid, 934 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-12-02 14:04:12,396 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 709 states.
[2023-12-02 14:04:12,441 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 698.
[2023-12-02 14:04:12,443 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 698 states, 576 states have (on average 1.4618055555555556) internal successors, (842), 580 states have internal predecessors, (842), 91 states have call successors, (91), 30 states have call predecessors, (91), 30 states have return successors, (137), 88 states have call predecessors, (137), 91 states have call successors, (137)
[2023-12-02 14:04:12,447 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1070 transitions.
[2023-12-02 14:04:12,447 INFO  L78                 Accepts]: Start accepts. Automaton has 698 states and 1070 transitions. Word has length 55
[2023-12-02 14:04:12,447 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 14:04:12,447 INFO  L495      AbstractCegarLoop]: Abstraction has 698 states and 1070 transitions.
[2023-12-02 14:04:12,448 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)
[2023-12-02 14:04:12,448 INFO  L276                IsEmpty]: Start isEmpty. Operand 698 states and 1070 transitions.
[2023-12-02 14:04:12,451 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 110
[2023-12-02 14:04:12,451 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 14:04:12,451 INFO  L195           NwaCegarLoop]: trace histogram [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]
[2023-12-02 14:04:12,452 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2023-12-02 14:04:12,452 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 14:04:12,452 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 14:04:12,453 INFO  L85        PathProgramCache]: Analyzing trace with hash 307429619, now seen corresponding path program 1 times
[2023-12-02 14:04:12,453 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 14:04:12,453 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380705422]
[2023-12-02 14:04:12,453 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:04:12,453 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 14:04:12,476 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:04:12,599 INFO  L134       CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2023-12-02 14:04:12,599 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 14:04:12,599 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380705422]
[2023-12-02 14:04:12,599 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380705422] provided 0 perfect and 1 imperfect interpolant sequences
[2023-12-02 14:04:12,600 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25806965]
[2023-12-02 14:04:12,600 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:04:12,600 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-12-02 14:04:12,600 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3
[2023-12-02 14:04:12,603 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-12-02 14:04:12,613 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-12-02 14:04:12,809 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:04:12,813 INFO  L262         TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-12-02 14:04:12,821 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-12-02 14:04:12,877 INFO  L134       CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked.
[2023-12-02 14:04:12,877 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-12-02 14:04:12,877 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [25806965] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 14:04:12,878 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-12-02 14:04:12,878 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6
[2023-12-02 14:04:12,878 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388204566]
[2023-12-02 14:04:12,878 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 14:04:12,879 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 14:04:12,879 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 14:04:12,880 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 14:04:12,880 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2023-12-02 14:04:12,880 INFO  L87              Difference]: Start difference. First operand 698 states and 1070 transitions. Second operand  has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)
[2023-12-02 14:04:13,068 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 14:04:13,068 INFO  L93              Difference]: Finished difference Result 2066 states and 3256 transitions.
[2023-12-02 14:04:13,069 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 14:04:13,069 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109
[2023-12-02 14:04:13,069 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 14:04:13,080 INFO  L225             Difference]: With dead ends: 2066
[2023-12-02 14:04:13,080 INFO  L226             Difference]: Without dead ends: 1374
[2023-12-02 14:04:13,083 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2023-12-02 14:04:13,084 INFO  L413           NwaCegarLoop]: 189 mSDtfsCounter, 196 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-12-02 14:04:13,084 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 364 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-12-02 14:04:13,086 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1374 states.
[2023-12-02 14:04:13,157 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1367.
[2023-12-02 14:04:13,159 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1367 states, 1133 states have (on average 1.4563106796116505) internal successors, (1650), 1140 states have internal predecessors, (1650), 173 states have call successors, (173), 60 states have call predecessors, (173), 60 states have return successors, (261), 167 states have call predecessors, (261), 173 states have call successors, (261)
[2023-12-02 14:04:13,167 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 2084 transitions.
[2023-12-02 14:04:13,167 INFO  L78                 Accepts]: Start accepts. Automaton has 1367 states and 2084 transitions. Word has length 109
[2023-12-02 14:04:13,168 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 14:04:13,168 INFO  L495      AbstractCegarLoop]: Abstraction has 1367 states and 2084 transitions.
[2023-12-02 14:04:13,168 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)
[2023-12-02 14:04:13,168 INFO  L276                IsEmpty]: Start isEmpty. Operand 1367 states and 2084 transitions.
[2023-12-02 14:04:13,172 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 110
[2023-12-02 14:04:13,172 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 14:04:13,172 INFO  L195           NwaCegarLoop]: trace histogram [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]
[2023-12-02 14:04:13,179 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-12-02 14:04:13,375 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2023-12-02 14:04:13,375 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 14:04:13,376 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 14:04:13,376 INFO  L85        PathProgramCache]: Analyzing trace with hash 1940612947, now seen corresponding path program 1 times
[2023-12-02 14:04:13,376 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 14:04:13,376 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379218356]
[2023-12-02 14:04:13,376 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:04:13,376 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 14:04:13,398 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:04:13,515 INFO  L134       CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2023-12-02 14:04:13,515 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 14:04:13,515 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379218356]
[2023-12-02 14:04:13,516 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379218356] provided 0 perfect and 1 imperfect interpolant sequences
[2023-12-02 14:04:13,516 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085323011]
[2023-12-02 14:04:13,516 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:04:13,516 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-12-02 14:04:13,516 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3
[2023-12-02 14:04:13,519 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-12-02 14:04:13,521 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-12-02 14:04:13,725 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:04:13,728 INFO  L262         TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-12-02 14:04:13,733 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-12-02 14:04:13,791 INFO  L134       CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2023-12-02 14:04:13,792 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-12-02 14:04:13,792 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085323011] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 14:04:13,792 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-12-02 14:04:13,792 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6
[2023-12-02 14:04:13,792 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299520590]
[2023-12-02 14:04:13,793 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 14:04:13,793 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 14:04:13,793 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 14:04:13,794 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 14:04:13,794 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2023-12-02 14:04:13,794 INFO  L87              Difference]: Start difference. First operand 1367 states and 2084 transitions. Second operand  has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)
[2023-12-02 14:04:14,055 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 14:04:14,055 INFO  L93              Difference]: Finished difference Result 4058 states and 6354 transitions.
[2023-12-02 14:04:14,056 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 14:04:14,056 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109
[2023-12-02 14:04:14,056 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 14:04:14,077 INFO  L225             Difference]: With dead ends: 4058
[2023-12-02 14:04:14,077 INFO  L226             Difference]: Without dead ends: 2697
[2023-12-02 14:04:14,085 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2023-12-02 14:04:14,085 INFO  L413           NwaCegarLoop]: 184 mSDtfsCounter, 187 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-12-02 14:04:14,086 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 359 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-12-02 14:04:14,089 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2697 states.
[2023-12-02 14:04:14,279 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 2685.
[2023-12-02 14:04:14,285 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2685 states, 2232 states have (on average 1.449820788530466) internal successors, (3236), 2245 states have internal predecessors, (3236), 332 states have call successors, (332), 120 states have call predecessors, (332), 120 states have return successors, (500), 320 states have call predecessors, (500), 332 states have call successors, (500)
[2023-12-02 14:04:14,306 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2685 states to 2685 states and 4068 transitions.
[2023-12-02 14:04:14,306 INFO  L78                 Accepts]: Start accepts. Automaton has 2685 states and 4068 transitions. Word has length 109
[2023-12-02 14:04:14,306 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 14:04:14,306 INFO  L495      AbstractCegarLoop]: Abstraction has 2685 states and 4068 transitions.
[2023-12-02 14:04:14,307 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)
[2023-12-02 14:04:14,307 INFO  L276                IsEmpty]: Start isEmpty. Operand 2685 states and 4068 transitions.
[2023-12-02 14:04:14,313 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 110
[2023-12-02 14:04:14,313 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 14:04:14,313 INFO  L195           NwaCegarLoop]: trace histogram [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]
[2023-12-02 14:04:14,320 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2023-12-02 14:04:14,514 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6
[2023-12-02 14:04:14,514 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 14:04:14,514 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 14:04:14,514 INFO  L85        PathProgramCache]: Analyzing trace with hash -285977357, now seen corresponding path program 1 times
[2023-12-02 14:04:14,514 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 14:04:14,515 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436080530]
[2023-12-02 14:04:14,515 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:04:14,515 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 14:04:14,532 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:04:14,609 INFO  L134       CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2023-12-02 14:04:14,609 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 14:04:14,609 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436080530]
[2023-12-02 14:04:14,609 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436080530] provided 0 perfect and 1 imperfect interpolant sequences
[2023-12-02 14:04:14,610 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758491721]
[2023-12-02 14:04:14,610 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:04:14,610 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-12-02 14:04:14,610 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3
[2023-12-02 14:04:14,611 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-12-02 14:04:14,616 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-12-02 14:04:14,816 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:04:14,819 INFO  L262         TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-12-02 14:04:14,825 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-12-02 14:04:14,866 INFO  L134       CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2023-12-02 14:04:14,867 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-12-02 14:04:14,867 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758491721] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 14:04:14,867 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-12-02 14:04:14,867 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6
[2023-12-02 14:04:14,867 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749924100]
[2023-12-02 14:04:14,867 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 14:04:14,868 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 14:04:14,868 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 14:04:14,868 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 14:04:14,869 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2023-12-02 14:04:14,869 INFO  L87              Difference]: Start difference. First operand 2685 states and 4068 transitions. Second operand  has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)
[2023-12-02 14:04:15,232 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 14:04:15,232 INFO  L93              Difference]: Finished difference Result 7982 states and 12409 transitions.
[2023-12-02 14:04:15,233 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 14:04:15,233 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109
[2023-12-02 14:04:15,233 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 14:04:15,262 INFO  L225             Difference]: With dead ends: 7982
[2023-12-02 14:04:15,262 INFO  L226             Difference]: Without dead ends: 5303
[2023-12-02 14:04:15,272 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2023-12-02 14:04:15,273 INFO  L413           NwaCegarLoop]: 184 mSDtfsCounter, 193 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-12-02 14:04:15,273 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 359 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-12-02 14:04:15,278 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5303 states.
[2023-12-02 14:04:15,524 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5303 to 5281.
[2023-12-02 14:04:15,532 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5281 states, 4400 states have (on average 1.4427272727272726) internal successors, (6348), 4425 states have internal predecessors, (6348), 640 states have call successors, (640), 240 states have call predecessors, (640), 240 states have return successors, (960), 616 states have call predecessors, (960), 640 states have call successors, (960)
[2023-12-02 14:04:15,549 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 7948 transitions.
[2023-12-02 14:04:15,550 INFO  L78                 Accepts]: Start accepts. Automaton has 5281 states and 7948 transitions. Word has length 109
[2023-12-02 14:04:15,550 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 14:04:15,550 INFO  L495      AbstractCegarLoop]: Abstraction has 5281 states and 7948 transitions.
[2023-12-02 14:04:15,551 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)
[2023-12-02 14:04:15,551 INFO  L276                IsEmpty]: Start isEmpty. Operand 5281 states and 7948 transitions.
[2023-12-02 14:04:15,557 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 110
[2023-12-02 14:04:15,558 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 14:04:15,558 INFO  L195           NwaCegarLoop]: trace histogram [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]
[2023-12-02 14:04:15,563 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2023-12-02 14:04:15,758 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-12-02 14:04:15,759 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 14:04:15,759 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 14:04:15,759 INFO  L85        PathProgramCache]: Analyzing trace with hash 150768275, now seen corresponding path program 1 times
[2023-12-02 14:04:15,759 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 14:04:15,759 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902277293]
[2023-12-02 14:04:15,759 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:04:15,759 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 14:04:15,782 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:04:15,888 INFO  L134       CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2023-12-02 14:04:15,888 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 14:04:15,888 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902277293]
[2023-12-02 14:04:15,888 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902277293] provided 0 perfect and 1 imperfect interpolant sequences
[2023-12-02 14:04:15,888 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146873858]
[2023-12-02 14:04:15,888 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:04:15,888 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-12-02 14:04:15,889 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3
[2023-12-02 14:04:15,889 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-12-02 14:04:15,904 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2023-12-02 14:04:16,089 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:04:16,093 INFO  L262         TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-12-02 14:04:16,098 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-12-02 14:04:16,176 INFO  L134       CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2023-12-02 14:04:16,176 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-12-02 14:04:16,176 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146873858] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 14:04:16,176 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-12-02 14:04:16,176 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6
[2023-12-02 14:04:16,176 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798852519]
[2023-12-02 14:04:16,177 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 14:04:16,177 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 14:04:16,177 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 14:04:16,178 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 14:04:16,178 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2023-12-02 14:04:16,178 INFO  L87              Difference]: Start difference. First operand 5281 states and 7948 transitions. Second operand  has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)
[2023-12-02 14:04:16,836 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 14:04:16,836 INFO  L93              Difference]: Finished difference Result 15710 states and 24237 transitions.
[2023-12-02 14:04:16,837 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 14:04:16,837 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109
[2023-12-02 14:04:16,837 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 14:04:16,920 INFO  L225             Difference]: With dead ends: 15710
[2023-12-02 14:04:16,920 INFO  L226             Difference]: Without dead ends: 10435
[2023-12-02 14:04:16,946 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2023-12-02 14:04:16,947 INFO  L413           NwaCegarLoop]: 184 mSDtfsCounter, 181 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-12-02 14:04:16,947 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 359 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-12-02 14:04:16,960 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10435 states.
[2023-12-02 14:04:17,680 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10435 to 10393.
[2023-12-02 14:04:17,701 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10393 states, 8676 states have (on average 1.4352236053480867) internal successors, (12452), 8725 states have internal predecessors, (12452), 1236 states have call successors, (1236), 480 states have call predecessors, (1236), 480 states have return successors, (1844), 1188 states have call predecessors, (1844), 1236 states have call successors, (1844)
[2023-12-02 14:04:17,751 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10393 states to 10393 states and 15532 transitions.
[2023-12-02 14:04:17,752 INFO  L78                 Accepts]: Start accepts. Automaton has 10393 states and 15532 transitions. Word has length 109
[2023-12-02 14:04:17,752 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 14:04:17,752 INFO  L495      AbstractCegarLoop]: Abstraction has 10393 states and 15532 transitions.
[2023-12-02 14:04:17,752 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7)
[2023-12-02 14:04:17,753 INFO  L276                IsEmpty]: Start isEmpty. Operand 10393 states and 15532 transitions.
[2023-12-02 14:04:17,798 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 110
[2023-12-02 14:04:17,798 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 14:04:17,798 INFO  L195           NwaCegarLoop]: trace histogram [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]
[2023-12-02 14:04:17,805 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2023-12-02 14:04:17,999 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8
[2023-12-02 14:04:17,999 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 14:04:17,999 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 14:04:17,999 INFO  L85        PathProgramCache]: Analyzing trace with hash 846213171, now seen corresponding path program 1 times
[2023-12-02 14:04:18,000 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 14:04:18,000 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405652167]
[2023-12-02 14:04:18,000 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:04:18,000 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 14:04:18,029 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:04:18,119 INFO  L134       CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked.
[2023-12-02 14:04:18,119 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 14:04:18,120 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405652167]
[2023-12-02 14:04:18,120 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405652167] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 14:04:18,120 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 14:04:18,120 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-12-02 14:04:18,120 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140679137]
[2023-12-02 14:04:18,120 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 14:04:18,121 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 14:04:18,121 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 14:04:18,122 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 14:04:18,122 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 14:04:18,122 INFO  L87              Difference]: Start difference. First operand 10393 states and 15532 transitions. Second operand  has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8)
[2023-12-02 14:04:18,927 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 14:04:18,927 INFO  L93              Difference]: Finished difference Result 21211 states and 32365 transitions.
[2023-12-02 14:04:18,928 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 14:04:18,928 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 109
[2023-12-02 14:04:18,928 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 14:04:19,009 INFO  L225             Difference]: With dead ends: 21211
[2023-12-02 14:04:19,009 INFO  L226             Difference]: Without dead ends: 12889
[2023-12-02 14:04:19,047 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 14:04:19,048 INFO  L413           NwaCegarLoop]: 289 mSDtfsCounter, 100 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-12-02 14:04:19,048 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 482 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-12-02 14:04:19,064 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12889 states.
[2023-12-02 14:04:19,850 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12889 to 12105.
[2023-12-02 14:04:19,871 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12105 states, 10324 states have (on average 1.4618364974815963) internal successors, (15092), 10373 states have internal predecessors, (15092), 1268 states have call successors, (1268), 512 states have call predecessors, (1268), 512 states have return successors, (1876), 1220 states have call predecessors, (1876), 1268 states have call successors, (1876)
[2023-12-02 14:04:19,905 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12105 states to 12105 states and 18236 transitions.
[2023-12-02 14:04:19,906 INFO  L78                 Accepts]: Start accepts. Automaton has 12105 states and 18236 transitions. Word has length 109
[2023-12-02 14:04:19,907 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 14:04:19,907 INFO  L495      AbstractCegarLoop]: Abstraction has 12105 states and 18236 transitions.
[2023-12-02 14:04:19,907 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8)
[2023-12-02 14:04:19,907 INFO  L276                IsEmpty]: Start isEmpty. Operand 12105 states and 18236 transitions.
[2023-12-02 14:04:19,939 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 149
[2023-12-02 14:04:19,939 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 14:04:19,940 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2023-12-02 14:04:19,940 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2023-12-02 14:04:19,940 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 14:04:19,940 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 14:04:19,940 INFO  L85        PathProgramCache]: Analyzing trace with hash -1399018306, now seen corresponding path program 1 times
[2023-12-02 14:04:19,941 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 14:04:19,941 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940341631]
[2023-12-02 14:04:19,941 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:04:19,941 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 14:04:20,006 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:04:20,071 INFO  L134       CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked.
[2023-12-02 14:04:20,071 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 14:04:20,071 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940341631]
[2023-12-02 14:04:20,071 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940341631] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 14:04:20,071 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 14:04:20,072 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-12-02 14:04:20,072 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511260747]
[2023-12-02 14:04:20,072 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 14:04:20,072 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 14:04:20,073 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 14:04:20,073 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 14:04:20,073 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 14:04:20,074 INFO  L87              Difference]: Start difference. First operand 12105 states and 18236 transitions. Second operand  has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)
[2023-12-02 14:04:21,145 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 14:04:21,145 INFO  L93              Difference]: Finished difference Result 35950 states and 55217 transitions.
[2023-12-02 14:04:21,146 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 14:04:21,146 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 148
[2023-12-02 14:04:21,146 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 14:04:21,224 INFO  L225             Difference]: With dead ends: 35950
[2023-12-02 14:04:21,224 INFO  L226             Difference]: Without dead ends: 23851
[2023-12-02 14:04:21,253 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 14:04:21,254 INFO  L413           NwaCegarLoop]: 186 mSDtfsCounter, 186 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-12-02 14:04:21,254 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 361 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-12-02 14:04:21,277 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 23851 states.
[2023-12-02 14:04:22,380 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 23851 to 23737.
[2023-12-02 14:04:22,412 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23737 states, 20260 states have (on average 1.4517275419545903) internal successors, (29412), 20357 states have internal predecessors, (29412), 2452 states have call successors, (2452), 1024 states have call predecessors, (2452), 1024 states have return successors, (3604), 2356 states have call predecessors, (3604), 2452 states have call successors, (3604)
[2023-12-02 14:04:22,506 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23737 states to 23737 states and 35468 transitions.
[2023-12-02 14:04:22,507 INFO  L78                 Accepts]: Start accepts. Automaton has 23737 states and 35468 transitions. Word has length 148
[2023-12-02 14:04:22,508 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 14:04:22,508 INFO  L495      AbstractCegarLoop]: Abstraction has 23737 states and 35468 transitions.
[2023-12-02 14:04:22,508 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)
[2023-12-02 14:04:22,508 INFO  L276                IsEmpty]: Start isEmpty. Operand 23737 states and 35468 transitions.
[2023-12-02 14:04:22,568 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 149
[2023-12-02 14:04:22,568 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 14:04:22,569 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2023-12-02 14:04:22,569 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10
[2023-12-02 14:04:22,569 INFO  L420      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 14:04:22,569 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 14:04:22,569 INFO  L85        PathProgramCache]: Analyzing trace with hash -799284694, now seen corresponding path program 1 times
[2023-12-02 14:04:22,569 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 14:04:22,570 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644465527]
[2023-12-02 14:04:22,570 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:04:22,570 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 14:04:22,601 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:04:22,665 INFO  L134       CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked.
[2023-12-02 14:04:22,665 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 14:04:22,665 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644465527]
[2023-12-02 14:04:22,666 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644465527] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 14:04:22,666 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 14:04:22,666 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-12-02 14:04:22,666 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958858920]
[2023-12-02 14:04:22,666 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 14:04:22,666 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 14:04:22,667 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 14:04:22,667 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 14:04:22,667 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 14:04:22,667 INFO  L87              Difference]: Start difference. First operand 23737 states and 35468 transitions. Second operand  has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)
[2023-12-02 14:04:24,380 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 14:04:24,380 INFO  L93              Difference]: Finished difference Result 70494 states and 107297 transitions.
[2023-12-02 14:04:24,381 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 14:04:24,381 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 148
[2023-12-02 14:04:24,381 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 14:04:24,589 INFO  L225             Difference]: With dead ends: 70494
[2023-12-02 14:04:24,589 INFO  L226             Difference]: Without dead ends: 46763
[2023-12-02 14:04:24,662 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 14:04:24,662 INFO  L413           NwaCegarLoop]: 186 mSDtfsCounter, 188 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2023-12-02 14:04:24,663 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 361 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2023-12-02 14:04:24,715 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 46763 states.
[2023-12-02 14:04:27,177 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 46763 to 46537.
[2023-12-02 14:04:27,205 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 46537 states, 39748 states have (on average 1.441179430411593) internal successors, (57284), 39941 states have internal predecessors, (57284), 4740 states have call successors, (4740), 2048 states have call predecessors, (4740), 2048 states have return successors, (6916), 4548 states have call predecessors, (6916), 4740 states have call successors, (6916)
[2023-12-02 14:04:27,329 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 46537 states to 46537 states and 68940 transitions.
[2023-12-02 14:04:27,331 INFO  L78                 Accepts]: Start accepts. Automaton has 46537 states and 68940 transitions. Word has length 148
[2023-12-02 14:04:27,331 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 14:04:27,332 INFO  L495      AbstractCegarLoop]: Abstraction has 46537 states and 68940 transitions.
[2023-12-02 14:04:27,332 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)
[2023-12-02 14:04:27,332 INFO  L276                IsEmpty]: Start isEmpty. Operand 46537 states and 68940 transitions.
[2023-12-02 14:04:27,395 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 149
[2023-12-02 14:04:27,395 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 14:04:27,395 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2023-12-02 14:04:27,395 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11
[2023-12-02 14:04:27,395 INFO  L420      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 14:04:27,395 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 14:04:27,395 INFO  L85        PathProgramCache]: Analyzing trace with hash -996517796, now seen corresponding path program 1 times
[2023-12-02 14:04:27,396 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 14:04:27,396 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248630853]
[2023-12-02 14:04:27,396 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:04:27,396 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 14:04:27,421 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:04:27,468 INFO  L134       CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked.
[2023-12-02 14:04:27,468 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 14:04:27,468 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248630853]
[2023-12-02 14:04:27,469 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248630853] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 14:04:27,469 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-12-02 14:04:27,469 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-12-02 14:04:27,469 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269947878]
[2023-12-02 14:04:27,469 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 14:04:27,469 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 14:04:27,469 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 14:04:27,470 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 14:04:27,470 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-12-02 14:04:27,470 INFO  L87              Difference]: Start difference. First operand 46537 states and 68940 transitions. Second operand  has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)
[2023-12-02 14:04:30,668 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 14:04:30,668 INFO  L93              Difference]: Finished difference Result 138190 states and 208337 transitions.
[2023-12-02 14:04:30,669 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 14:04:30,669 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 148
[2023-12-02 14:04:30,669 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 14:04:30,981 INFO  L225             Difference]: With dead ends: 138190
[2023-12-02 14:04:30,981 INFO  L226             Difference]: Without dead ends: 91659
[2023-12-02 14:04:31,121 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 14:04:31,122 INFO  L413           NwaCegarLoop]: 186 mSDtfsCounter, 191 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-12-02 14:04:31,122 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 361 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-12-02 14:04:31,212 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 91659 states.
[2023-12-02 14:04:35,140 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 91659 to 91209.
[2023-12-02 14:04:35,193 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 91209 states, 77956 states have (on average 1.4301913900148802) internal successors, (111492), 78341 states have internal predecessors, (111492), 9156 states have call successors, (9156), 4096 states have call predecessors, (9156), 4096 states have return successors, (13252), 8772 states have call predecessors, (13252), 9156 states have call successors, (13252)
[2023-12-02 14:04:35,444 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 91209 states to 91209 states and 133900 transitions.
[2023-12-02 14:04:35,447 INFO  L78                 Accepts]: Start accepts. Automaton has 91209 states and 133900 transitions. Word has length 148
[2023-12-02 14:04:35,447 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 14:04:35,447 INFO  L495      AbstractCegarLoop]: Abstraction has 91209 states and 133900 transitions.
[2023-12-02 14:04:35,447 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)
[2023-12-02 14:04:35,447 INFO  L276                IsEmpty]: Start isEmpty. Operand 91209 states and 133900 transitions.
[2023-12-02 14:04:35,833 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 169
[2023-12-02 14:04:35,833 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 14:04:35,834 INFO  L195           NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2023-12-02 14:04:35,834 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12
[2023-12-02 14:04:35,834 INFO  L420      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 14:04:35,834 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 14:04:35,834 INFO  L85        PathProgramCache]: Analyzing trace with hash 986066723, now seen corresponding path program 1 times
[2023-12-02 14:04:35,834 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 14:04:35,835 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764028058]
[2023-12-02 14:04:35,835 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:04:35,835 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 14:04:35,862 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:04:36,769 INFO  L134       CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 56 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked.
[2023-12-02 14:04:36,769 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 14:04:36,769 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764028058]
[2023-12-02 14:04:36,770 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764028058] provided 0 perfect and 1 imperfect interpolant sequences
[2023-12-02 14:04:36,770 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439275995]
[2023-12-02 14:04:36,770 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:04:36,770 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-12-02 14:04:36,770 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3
[2023-12-02 14:04:36,771 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-12-02 14:04:36,774 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2023-12-02 14:04:37,016 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:04:37,020 INFO  L262         TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 24 conjunts are in the unsatisfiable core
[2023-12-02 14:04:37,028 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-12-02 14:04:37,300 INFO  L134       CoverageAnalysis]: Checked inductivity of 127 backedges. 82 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked.
[2023-12-02 14:04:37,300 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-12-02 14:04:37,789 INFO  L134       CoverageAnalysis]: Checked inductivity of 127 backedges. 13 proven. 56 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked.
[2023-12-02 14:04:37,789 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [439275995] provided 0 perfect and 2 imperfect interpolant sequences
[2023-12-02 14:04:37,790 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [252570974]
[2023-12-02 14:04:37,816 INFO  L159        IcfgInterpreter]: Started Sifa with 86 locations of interest
[2023-12-02 14:04:37,816 INFO  L166        IcfgInterpreter]: Building call graph
[2023-12-02 14:04:37,820 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-12-02 14:04:37,826 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-12-02 14:04:37,826 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-12-02 14:04:56,000 INFO  L197        IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 81 for LOIs
[2023-12-02 14:04:56,072 INFO  L197        IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 101 for LOIs
[2023-12-02 14:04:56,334 INFO  L197        IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 172 for LOIs
[2023-12-02 14:04:56,574 INFO  L197        IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 134 for LOIs
[2023-12-02 14:04:57,086 INFO  L197        IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 81 for LOIs
[2023-12-02 14:05:01,148 INFO  L197        IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 227 for LOIs
[2023-12-02 14:05:01,635 INFO  L180        IcfgInterpreter]: Interpretation finished
[2023-12-02 14:05:31,324 INFO  L133             SifaRunner]: Sifa could not show that error location is unreachable, found '601408#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= ~t1_i~0 1) (= ~slow_clk_edge~0 0) (= 0 ~t7_pc~0) (= ~p_last_write~0 0) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= 0 ~t6_pc~0) (= 0 ~t3_pc~0) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (= ~q_req_up~0 0) (= ~t8_i~0 1) (= ~fast_clk_edge~0 0) (= ~q_ev~0 0) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= |ULTIMATE.start_start_simulation2_~kernel_st~1#1| 1) (= ~t~0 0) (= ~t6_i~0 1) (<= 0 |ULTIMATE.start_eval2_~tmp~5#1|) (<= |ULTIMATE.start_eval2_~tmp~5#1| 1) (= ~p_dw_st~0 0) (= ~t7_i~0 1) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= ~t5_i~0 1) (= ~a_t~0 0) (= 0 ~t4_pc~0) (= ~t3_i~0 1) (not (= ~token~0 (+ 8 ~local~0))) (= ~t4_i~0 1) (not (= |ULTIMATE.start_eval2_~tmp~5#1| 0)) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)))' at error location
[2023-12-02 14:05:31,324 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED
[2023-12-02 14:05:31,324 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-12-02 14:05:31,324 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13
[2023-12-02 14:05:31,325 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498713382]
[2023-12-02 14:05:31,325 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-12-02 14:05:31,326 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2023-12-02 14:05:31,326 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 14:05:31,326 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2023-12-02 14:05:31,329 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=4983, Unknown=0, NotChecked=0, Total=5550
[2023-12-02 14:05:31,329 INFO  L87              Difference]: Start difference. First operand 91209 states and 133900 transitions. Second operand  has 13 states, 13 states have (on average 18.076923076923077) internal successors, (235), 13 states have internal predecessors, (235), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35)
[2023-12-02 14:05:40,699 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 14:05:40,699 INFO  L93              Difference]: Finished difference Result 330769 states and 493008 transitions.
[2023-12-02 14:05:40,700 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2023-12-02 14:05:40,700 INFO  L78                 Accepts]: Start accepts. Automaton has  has 13 states, 13 states have (on average 18.076923076923077) internal successors, (235), 13 states have internal predecessors, (235), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35) Word has length 168
[2023-12-02 14:05:40,700 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 14:05:41,559 INFO  L225             Difference]: With dead ends: 330769
[2023-12-02 14:05:41,559 INFO  L226             Difference]: Without dead ends: 239567
[2023-12-02 14:05:41,713 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 420 SyntacticMatches, 32 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4719 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=1011, Invalid=8691, Unknown=0, NotChecked=0, Total=9702
[2023-12-02 14:05:41,713 INFO  L413           NwaCegarLoop]: 239 mSDtfsCounter, 2859 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2859 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-12-02 14:05:41,714 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [2859 Valid, 1052 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [614 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-12-02 14:05:41,859 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 239567 states.
[2023-12-02 14:05:52,495 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 239567 to 211529.
[2023-12-02 14:05:52,633 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 211529 states, 180292 states have (on average 1.4100015530361858) internal successors, (254212), 181253 states have internal predecessors, (254212), 21444 states have call successors, (21444), 9792 states have call predecessors, (21444), 9792 states have return successors, (31684), 20484 states have call predecessors, (31684), 21444 states have call successors, (31684)
[2023-12-02 14:05:53,654 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 211529 states to 211529 states and 307340 transitions.
[2023-12-02 14:05:53,662 INFO  L78                 Accepts]: Start accepts. Automaton has 211529 states and 307340 transitions. Word has length 168
[2023-12-02 14:05:53,662 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 14:05:53,662 INFO  L495      AbstractCegarLoop]: Abstraction has 211529 states and 307340 transitions.
[2023-12-02 14:05:53,663 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 13 states, 13 states have (on average 18.076923076923077) internal successors, (235), 13 states have internal predecessors, (235), 8 states have call successors, (35), 7 states have call predecessors, (35), 8 states have return successors, (35), 8 states have call predecessors, (35), 8 states have call successors, (35)
[2023-12-02 14:05:53,663 INFO  L276                IsEmpty]: Start isEmpty. Operand 211529 states and 307340 transitions.
[2023-12-02 14:05:54,241 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 176
[2023-12-02 14:05:54,241 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 14:05:54,241 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:05:54,247 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0
[2023-12-02 14:05:54,442 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2023-12-02 14:05:54,442 INFO  L420      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 14:05:54,442 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 14:05:54,442 INFO  L85        PathProgramCache]: Analyzing trace with hash 1257898073, now seen corresponding path program 1 times
[2023-12-02 14:05:54,443 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 14:05:54,443 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614494499]
[2023-12-02 14:05:54,443 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:05:54,443 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 14:05:54,470 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:05:55,001 INFO  L134       CoverageAnalysis]: Checked inductivity of 121 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked.
[2023-12-02 14:05:55,001 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 14:05:55,002 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614494499]
[2023-12-02 14:05:55,002 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614494499] provided 0 perfect and 1 imperfect interpolant sequences
[2023-12-02 14:05:55,002 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552836209]
[2023-12-02 14:05:55,002 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:05:55,002 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-12-02 14:05:55,002 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3
[2023-12-02 14:05:55,003 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-12-02 14:05:55,006 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2023-12-02 14:05:55,234 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:05:55,239 INFO  L262         TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-12-02 14:05:55,244 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-12-02 14:05:55,430 INFO  L134       CoverageAnalysis]: Checked inductivity of 121 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked.
[2023-12-02 14:05:55,430 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-12-02 14:05:55,430 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [552836209] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 14:05:55,430 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-12-02 14:05:55,430 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7
[2023-12-02 14:05:55,430 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541343743]
[2023-12-02 14:05:55,430 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 14:05:55,431 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 14:05:55,431 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 14:05:55,431 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 14:05:55,431 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2023-12-02 14:05:55,432 INFO  L87              Difference]: Start difference. First operand 211529 states and 307340 transitions. Second operand  has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)
[2023-12-02 14:06:06,728 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 14:06:06,728 INFO  L93              Difference]: Finished difference Result 423531 states and 616853 transitions.
[2023-12-02 14:06:06,729 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 14:06:06,729 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 175
[2023-12-02 14:06:06,729 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 14:06:07,650 INFO  L225             Difference]: With dead ends: 423531
[2023-12-02 14:06:07,651 INFO  L226             Difference]: Without dead ends: 267625
[2023-12-02 14:06:08,140 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2023-12-02 14:06:08,140 INFO  L413           NwaCegarLoop]: 213 mSDtfsCounter, 178 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-12-02 14:06:08,141 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 262 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-12-02 14:06:08,334 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 267625 states.
[2023-12-02 14:06:20,603 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 267625 to 260009.
[2023-12-02 14:06:20,928 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 260009 states, 224954 states have (on average 1.3818025018448217) internal successors, (310842), 225723 states have internal predecessors, (310842), 22584 states have call successors, (22584), 12468 states have call predecessors, (22584), 12470 states have return successors, (33390), 21818 states have call predecessors, (33390), 22584 states have call successors, (33390)
[2023-12-02 14:06:21,830 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 260009 states to 260009 states and 366816 transitions.
[2023-12-02 14:06:21,842 INFO  L78                 Accepts]: Start accepts. Automaton has 260009 states and 366816 transitions. Word has length 175
[2023-12-02 14:06:21,842 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 14:06:21,842 INFO  L495      AbstractCegarLoop]: Abstraction has 260009 states and 366816 transitions.
[2023-12-02 14:06:21,842 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)
[2023-12-02 14:06:21,842 INFO  L276                IsEmpty]: Start isEmpty. Operand 260009 states and 366816 transitions.
[2023-12-02 14:06:22,551 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 176
[2023-12-02 14:06:22,552 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 14:06:22,552 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2023-12-02 14:06:22,557 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2023-12-02 14:06:22,752 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2023-12-02 14:06:22,753 INFO  L420      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 14:06:22,753 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 14:06:22,753 INFO  L85        PathProgramCache]: Analyzing trace with hash -897616328, now seen corresponding path program 1 times
[2023-12-02 14:06:22,753 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 14:06:22,753 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316015838]
[2023-12-02 14:06:22,753 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:06:22,753 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 14:06:22,774 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:06:23,100 INFO  L134       CoverageAnalysis]: Checked inductivity of 123 backedges. 17 proven. 57 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked.
[2023-12-02 14:06:23,100 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 14:06:23,100 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316015838]
[2023-12-02 14:06:23,100 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316015838] provided 0 perfect and 1 imperfect interpolant sequences
[2023-12-02 14:06:23,101 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58443849]
[2023-12-02 14:06:23,101 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:06:23,101 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-12-02 14:06:23,101 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3
[2023-12-02 14:06:23,102 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-12-02 14:06:23,104 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2023-12-02 14:06:23,324 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:06:23,327 INFO  L262         TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 2 conjunts are in the unsatisfiable core
[2023-12-02 14:06:23,332 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-12-02 14:06:23,358 INFO  L134       CoverageAnalysis]: Checked inductivity of 123 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked.
[2023-12-02 14:06:23,358 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-12-02 14:06:23,358 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [58443849] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 14:06:23,358 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-12-02 14:06:23,359 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7
[2023-12-02 14:06:23,359 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995756871]
[2023-12-02 14:06:23,359 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 14:06:23,359 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-12-02 14:06:23,359 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 14:06:23,360 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-12-02 14:06:23,360 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2023-12-02 14:06:23,360 INFO  L87              Difference]: Start difference. First operand 260009 states and 366816 transitions. Second operand  has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)
[2023-12-02 14:06:37,669 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 14:06:37,670 INFO  L93              Difference]: Finished difference Result 500769 states and 714272 transitions.
[2023-12-02 14:06:37,670 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-12-02 14:06:37,670 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 175
[2023-12-02 14:06:37,671 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 14:06:38,944 INFO  L225             Difference]: With dead ends: 500769
[2023-12-02 14:06:38,944 INFO  L226             Difference]: Without dead ends: 368735
[2023-12-02 14:06:39,264 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2023-12-02 14:06:39,265 INFO  L413           NwaCegarLoop]: 329 mSDtfsCounter, 147 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-12-02 14:06:39,265 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 524 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-12-02 14:06:39,605 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 368735 states.
[2023-12-02 14:06:53,622 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 368735 to 307385.
[2023-12-02 14:06:53,793 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 307385 states, 270218 states have (on average 1.4062497687052675) internal successors, (379994), 270987 states have internal predecessors, (379994), 23640 states have call successors, (23640), 13524 states have call predecessors, (23640), 13526 states have return successors, (34446), 22874 states have call predecessors, (34446), 23640 states have call successors, (34446)
[2023-12-02 14:06:54,745 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 307385 states to 307385 states and 438080 transitions.
[2023-12-02 14:06:55,089 INFO  L78                 Accepts]: Start accepts. Automaton has 307385 states and 438080 transitions. Word has length 175
[2023-12-02 14:06:55,090 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 14:06:55,090 INFO  L495      AbstractCegarLoop]: Abstraction has 307385 states and 438080 transitions.
[2023-12-02 14:06:55,090 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)
[2023-12-02 14:06:55,090 INFO  L276                IsEmpty]: Start isEmpty. Operand 307385 states and 438080 transitions.
[2023-12-02 14:06:55,536 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 176
[2023-12-02 14:06:55,536 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 14:06:55,536 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:06:55,542 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2023-12-02 14:06:55,737 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-12-02 14:06:55,737 INFO  L420      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 14:06:55,737 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 14:06:55,737 INFO  L85        PathProgramCache]: Analyzing trace with hash -1349145034, now seen corresponding path program 2 times
[2023-12-02 14:06:55,737 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 14:06:55,737 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718173645]
[2023-12-02 14:06:55,737 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:06:55,738 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 14:06:55,757 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:06:56,017 INFO  L134       CoverageAnalysis]: Checked inductivity of 121 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked.
[2023-12-02 14:06:56,017 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 14:06:56,018 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718173645]
[2023-12-02 14:06:56,018 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718173645] provided 0 perfect and 1 imperfect interpolant sequences
[2023-12-02 14:06:56,018 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321321604]
[2023-12-02 14:06:56,018 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2023-12-02 14:06:56,018 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-12-02 14:06:56,018 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3
[2023-12-02 14:06:56,019 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-12-02 14:06:56,024 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2023-12-02 14:06:56,178 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s)
[2023-12-02 14:06:56,178 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2023-12-02 14:06:56,181 INFO  L262         TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 5 conjunts are in the unsatisfiable core
[2023-12-02 14:06:56,185 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-12-02 14:06:56,225 INFO  L134       CoverageAnalysis]: Checked inductivity of 121 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2023-12-02 14:06:56,225 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-12-02 14:06:56,225 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321321604] provided 1 perfect and 0 imperfect interpolant sequences
[2023-12-02 14:06:56,225 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-12-02 14:06:56,225 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8
[2023-12-02 14:06:56,225 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746929989]
[2023-12-02 14:06:56,225 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-12-02 14:06:56,226 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-12-02 14:06:56,226 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-12-02 14:06:56,226 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-12-02 14:06:56,227 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2023-12-02 14:06:56,227 INFO  L87              Difference]: Start difference. First operand 307385 states and 438080 transitions. Second operand  has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10)
[2023-12-02 14:07:09,219 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-12-02 14:07:09,219 INFO  L93              Difference]: Finished difference Result 544334 states and 775121 transitions.
[2023-12-02 14:07:09,220 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-12-02 14:07:09,220 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 175
[2023-12-02 14:07:09,220 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-12-02 14:07:10,078 INFO  L225             Difference]: With dead ends: 544334
[2023-12-02 14:07:10,079 INFO  L226             Difference]: Without dead ends: 319648
[2023-12-02 14:07:10,516 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2023-12-02 14:07:10,517 INFO  L413           NwaCegarLoop]: 273 mSDtfsCounter, 177 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-12-02 14:07:10,517 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 724 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-12-02 14:07:10,739 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 319648 states.
[2023-12-02 14:07:24,206 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 319648 to 318450.
[2023-12-02 14:07:24,359 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 318450 states, 280502 states have (on average 1.4014017725363812) internal successors, (393096), 281655 states have internal predecessors, (393096), 23648 states have call successors, (23648), 13529 states have call predecessors, (23648), 14299 states have return successors, (35606), 23266 states have call predecessors, (35606), 23648 states have call successors, (35606)
[2023-12-02 14:07:25,664 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 318450 states to 318450 states and 452350 transitions.
[2023-12-02 14:07:25,677 INFO  L78                 Accepts]: Start accepts. Automaton has 318450 states and 452350 transitions. Word has length 175
[2023-12-02 14:07:25,677 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-12-02 14:07:25,677 INFO  L495      AbstractCegarLoop]: Abstraction has 318450 states and 452350 transitions.
[2023-12-02 14:07:25,678 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10)
[2023-12-02 14:07:25,678 INFO  L276                IsEmpty]: Start isEmpty. Operand 318450 states and 452350 transitions.
[2023-12-02 14:07:26,137 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 176
[2023-12-02 14:07:26,138 INFO  L187           NwaCegarLoop]: Found error trace
[2023-12-02 14:07:26,138 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2023-12-02 14:07:26,144 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2023-12-02 14:07:26,338 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2023-12-02 14:07:26,339 INFO  L420      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-12-02 14:07:26,339 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-12-02 14:07:26,339 INFO  L85        PathProgramCache]: Analyzing trace with hash 1784974903, now seen corresponding path program 2 times
[2023-12-02 14:07:26,339 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-12-02 14:07:26,339 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110500200]
[2023-12-02 14:07:26,339 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-12-02 14:07:26,339 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-12-02 14:07:26,360 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-12-02 14:07:26,587 INFO  L134       CoverageAnalysis]: Checked inductivity of 123 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked.
[2023-12-02 14:07:26,587 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-12-02 14:07:26,587 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110500200]
[2023-12-02 14:07:26,588 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110500200] provided 0 perfect and 1 imperfect interpolant sequences
[2023-12-02 14:07:26,588 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962748911]
[2023-12-02 14:07:26,588 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2023-12-02 14:07:26,588 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-12-02 14:07:26,588 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3
[2023-12-02 14:07:26,589 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-12-02 14:07:26,592 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13646ade-23d9-4c3a-9663-c682cc36cab5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2023-12-02 14:07:26,813 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2023-12-02 14:07:26,813 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2023-12-02 14:07:26,817 INFO  L262         TraceCheckSpWp]: Trace formula consists of 950 conjuncts, 24 conjunts are in the unsatisfiable core
[2023-12-02 14:07:26,821 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-12-02 14:07:27,284 INFO  L134       CoverageAnalysis]: Checked inductivity of 123 backedges. 83 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2023-12-02 14:07:27,284 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-12-02 14:07:27,593 INFO  L134       CoverageAnalysis]: Checked inductivity of 123 backedges. 22 proven. 58 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked.
[2023-12-02 14:07:27,593 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962748911] provided 0 perfect and 2 imperfect interpolant sequences
[2023-12-02 14:07:27,593 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [951299494]
[2023-12-02 14:07:27,596 INFO  L159        IcfgInterpreter]: Started Sifa with 87 locations of interest
[2023-12-02 14:07:27,596 INFO  L166        IcfgInterpreter]: Building call graph
[2023-12-02 14:07:27,597 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-12-02 14:07:27,597 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-12-02 14:07:27,597 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-12-02 14:07:41,021 INFO  L197        IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 221 for LOIs
[2023-12-02 14:07:41,289 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 19