./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-func-interl.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version 5e519f3a
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_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 26da7f156e13739b61b7ed4c87040e23884cfeea3f641f88c74635ade7491c15
--- Real Ultimate output ---
[0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset.
This is Ultimate 0.2.2-dev-5e519f3
[2022-11-02 20:49:08,416 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-11-02 20:49:08,423 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-11-02 20:49:08,488 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-11-02 20:49:08,491 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-11-02 20:49:08,496 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-11-02 20:49:08,499 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-11-02 20:49:08,503 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-11-02 20:49:08,507 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-11-02 20:49:08,511 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-11-02 20:49:08,512 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-11-02 20:49:08,516 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-11-02 20:49:08,517 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-11-02 20:49:08,519 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-11-02 20:49:08,521 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-11-02 20:49:08,522 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-11-02 20:49:08,523 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-11-02 20:49:08,524 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-11-02 20:49:08,526 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-11-02 20:49:08,528 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-11-02 20:49:08,530 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-11-02 20:49:08,531 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-11-02 20:49:08,533 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-11-02 20:49:08,534 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-11-02 20:49:08,538 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-11-02 20:49:08,539 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-11-02 20:49:08,539 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-11-02 20:49:08,540 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-11-02 20:49:08,541 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-11-02 20:49:08,542 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-11-02 20:49:08,543 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-11-02 20:49:08,544 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-11-02 20:49:08,544 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-11-02 20:49:08,545 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-11-02 20:49:08,547 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-11-02 20:49:08,547 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-11-02 20:49:08,548 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-11-02 20:49:08,548 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-11-02 20:49:08,549 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-11-02 20:49:08,550 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-11-02 20:49:08,551 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-11-02 20:49:08,552 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf
[2022-11-02 20:49:08,580 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-11-02 20:49:08,580 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-11-02 20:49:08,580 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-11-02 20:49:08,581 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-11-02 20:49:08,582 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-11-02 20:49:08,582 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-11-02 20:49:08,583 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-11-02 20:49:08,583 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-11-02 20:49:08,583 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-11-02 20:49:08,584 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-11-02 20:49:08,584 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-11-02 20:49:08,584 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-11-02 20:49:08,585 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-11-02 20:49:08,585 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-11-02 20:49:08,585 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-11-02 20:49:08,585 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-11-02 20:49:08,586 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-11-02 20:49:08,586 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-11-02 20:49:08,586 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-11-02 20:49:08,586 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-11-02 20:49:08,587 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-11-02 20:49:08,587 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-02 20:49:08,587 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-11-02 20:49:08,588 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-11-02 20:49:08,588 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-11-02 20:49:08,588 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-11-02 20:49:08,588 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-11-02 20:49:08,589 INFO  L138        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2022-11-02 20:49:08,589 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-11-02 20:49:08,589 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-11-02 20:49:08,589 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
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_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/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_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
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 -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26da7f156e13739b61b7ed4c87040e23884cfeea3f641f88c74635ade7491c15
[2022-11-02 20:49:08,917 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-11-02 20:49:08,954 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-11-02 20:49:08,958 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-11-02 20:49:08,960 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-11-02 20:49:08,961 INFO  L275        PluginConnector]: CDTParser initialized
[2022-11-02 20:49:08,963 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-func-interl.c
[2022-11-02 20:49:09,072 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/data/2f970be53/b54483b23e3e49dda21e92b5aaddffb8/FLAG148a1f04a
[2022-11-02 20:49:10,243 INFO  L306              CDTParser]: Found 1 translation units.
[2022-11-02 20:49:10,245 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-func-interl.c
[2022-11-02 20:49:10,338 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/data/2f970be53/b54483b23e3e49dda21e92b5aaddffb8/FLAG148a1f04a
[2022-11-02 20:49:10,482 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/data/2f970be53/b54483b23e3e49dda21e92b5aaddffb8
[2022-11-02 20:49:10,485 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-11-02 20:49:10,487 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-11-02 20:49:10,489 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-11-02 20:49:10,489 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-11-02 20:49:10,494 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-11-02 20:49:10,495 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:49:10" (1/1) ...
[2022-11-02 20:49:10,497 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@419eea6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:10, skipping insertion in model container
[2022-11-02 20:49:10,497 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:49:10" (1/1) ...
[2022-11-02 20:49:10,506 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-11-02 20:49:10,785 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-11-02 20:49:11,324 WARN  L230   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_fe7d3c95-74c5-4025-bd19-be75396e8417/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-func-interl.c[1014,1027]
[2022-11-02 20:49:13,253 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-11-02 20:49:13,258 INFO  L203         MainTranslator]: Completed pre-run
[2022-11-02 20:49:13,275 WARN  L230   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_fe7d3c95-74c5-4025-bd19-be75396e8417/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-func-interl.c[1014,1027]
[2022-11-02 20:49:14,531 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-11-02 20:49:14,547 INFO  L208         MainTranslator]: Completed translation
[2022-11-02 20:49:14,547 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:14 WrapperNode
[2022-11-02 20:49:14,550 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-11-02 20:49:14,551 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-11-02 20:49:14,552 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-11-02 20:49:14,553 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-11-02 20:49:14,564 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:14" (1/1) ...
[2022-11-02 20:49:14,971 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:14" (1/1) ...
[2022-11-02 20:49:16,774 INFO  L138                Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 23135
[2022-11-02 20:49:16,775 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-11-02 20:49:16,776 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-11-02 20:49:16,776 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-11-02 20:49:16,776 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-11-02 20:49:16,787 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:14" (1/1) ...
[2022-11-02 20:49:16,787 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:14" (1/1) ...
[2022-11-02 20:49:17,076 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:14" (1/1) ...
[2022-11-02 20:49:17,077 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:14" (1/1) ...
[2022-11-02 20:49:17,834 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:14" (1/1) ...
[2022-11-02 20:49:17,915 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:14" (1/1) ...
[2022-11-02 20:49:18,081 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:14" (1/1) ...
[2022-11-02 20:49:18,126 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:14" (1/1) ...
[2022-11-02 20:49:18,371 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-11-02 20:49:18,373 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-11-02 20:49:18,373 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-11-02 20:49:18,373 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-11-02 20:49:18,375 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:14" (1/1) ...
[2022-11-02 20:49:18,385 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-02 20:49:18,400 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:49:18,418 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-11-02 20:49:18,435 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-11-02 20:49:18,472 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-11-02 20:49:18,472 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-11-02 20:49:21,574 INFO  L235             CfgBuilder]: Building ICFG
[2022-11-02 20:49:21,577 INFO  L261             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-11-02 20:49:51,627 INFO  L276             CfgBuilder]: Performing block encoding
[2022-11-02 20:49:51,662 INFO  L295             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-11-02 20:49:51,662 INFO  L300             CfgBuilder]: Removed 1 assume(true) statements.
[2022-11-02 20:49:51,668 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:49:51 BoogieIcfgContainer
[2022-11-02 20:49:51,668 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-11-02 20:49:51,670 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-11-02 20:49:51,671 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-11-02 20:49:51,675 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-11-02 20:49:51,676 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:49:10" (1/3) ...
[2022-11-02 20:49:51,677 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b711b3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:49:51, skipping insertion in model container
[2022-11-02 20:49:51,677 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:14" (2/3) ...
[2022-11-02 20:49:51,677 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b711b3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:49:51, skipping insertion in model container
[2022-11-02 20:49:51,678 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:49:51" (3/3) ...
[2022-11-02 20:49:51,679 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.rushhour.2.prop1-func-interl.c
[2022-11-02 20:49:51,701 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-11-02 20:49:51,701 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-11-02 20:49:51,824 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-11-02 20:49:51,833 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@645c3115, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2022-11-02 20:49:51,833 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-11-02 20:49:51,851 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 3467 states, 3465 states have (on average 1.4998556998556998) internal successors, (5197), 3466 states have internal predecessors, (5197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-02 20:49:51,859 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2022-11-02 20:49:51,859 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:49:51,860 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2022-11-02 20:49:51,861 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:49:51,868 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:49:51,869 INFO  L85        PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times
[2022-11-02 20:49:51,880 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:49:51,880 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156140477]
[2022-11-02 20:49:51,881 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:49:51,881 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:49:52,467 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:49:53,607 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-02 20:49:53,608 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:49:53,608 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156140477]
[2022-11-02 20:49:53,609 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156140477] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:49:53,609 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:49:53,610 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-11-02 20:49:53,611 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737561925]
[2022-11-02 20:49:53,612 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:49:53,617 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-02 20:49:53,618 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:49:53,659 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-02 20:49:53,661 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-11-02 20:49:53,672 INFO  L87              Difference]: Start difference. First operand  has 3467 states, 3465 states have (on average 1.4998556998556998) internal successors, (5197), 3466 states have internal predecessors, (5197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-02 20:49:56,048 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-11-02 20:49:56,237 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:49:56,238 INFO  L93              Difference]: Finished difference Result 10387 states and 15579 transitions.
[2022-11-02 20:49:56,240 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-11-02 20:49:56,242 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5
[2022-11-02 20:49:56,242 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:49:56,279 INFO  L225             Difference]: With dead ends: 10387
[2022-11-02 20:49:56,279 INFO  L226             Difference]: Without dead ends: 6922
[2022-11-02 20:49:56,290 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:49:56,294 INFO  L413           NwaCegarLoop]: 5187 mSDtfsCounter, 15555 mSDsluCounter, 5190 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15555 SdHoareTripleChecker+Valid, 10377 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time
[2022-11-02 20:49:56,296 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [15555 Valid, 10377 Invalid, 9 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time]
[2022-11-02 20:49:56,328 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6922 states.
[2022-11-02 20:49:56,490 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6922 to 3465.
[2022-11-02 20:49:56,500 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3465 states, 3464 states have (on average 1.499133949191686) internal successors, (5193), 3464 states have internal predecessors, (5193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-02 20:49:56,512 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3465 states to 3465 states and 5193 transitions.
[2022-11-02 20:49:56,514 INFO  L78                 Accepts]: Start accepts. Automaton has 3465 states and 5193 transitions. Word has length 5
[2022-11-02 20:49:56,514 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:49:56,515 INFO  L495      AbstractCegarLoop]: Abstraction has 3465 states and 5193 transitions.
[2022-11-02 20:49:56,515 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-02 20:49:56,515 INFO  L276                IsEmpty]: Start isEmpty. Operand 3465 states and 5193 transitions.
[2022-11-02 20:49:56,678 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3465
[2022-11-02 20:49:56,678 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:49:56,680 INFO  L195           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-02 20:49:56,681 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-11-02 20:49:56,681 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:49:56,682 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:49:56,684 INFO  L85        PathProgramCache]: Analyzing trace with hash 1472339475, now seen corresponding path program 1 times
[2022-11-02 20:49:56,684 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:49:56,684 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447748745]
[2022-11-02 20:49:56,685 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:49:56,686 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:49:58,308 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:49:58,309 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [389638097]
[2022-11-02 20:49:58,310 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:49:58,311 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:49:58,311 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:49:58,315 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:49:58,322 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-11-02 20:50:13,846 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:50:14,145 INFO  L263         TraceCheckSpWp]: Trace formula consists of 36019 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-11-02 20:50:14,324 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:50:33,228 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-02 20:50:33,228 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-02 20:50:33,229 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:50:33,229 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447748745]
[2022-11-02 20:50:33,229 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:50:33,229 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389638097]
[2022-11-02 20:50:33,230 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [389638097] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:50:33,230 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:50:33,230 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-02 20:50:33,231 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739667438]
[2022-11-02 20:50:33,232 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:50:33,238 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-02 20:50:33,254 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:50:33,255 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-02 20:50:33,255 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:50:33,258 INFO  L87              Difference]: Start difference. First operand 3465 states and 5193 transitions. Second operand  has 5 states, 5 states have (on average 692.8) internal successors, (3464), 5 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-02 20:50:33,934 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:50:33,935 INFO  L93              Difference]: Finished difference Result 17230 states and 25831 transitions.
[2022-11-02 20:50:33,936 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-11-02 20:50:33,938 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 692.8) internal successors, (3464), 5 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3464
[2022-11-02 20:50:33,950 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:50:33,998 INFO  L225             Difference]: With dead ends: 17230
[2022-11-02 20:50:33,999 INFO  L226             Difference]: Without dead ends: 13769
[2022-11-02 20:50:34,010 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3468 GetRequests, 3462 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2022-11-02 20:50:34,012 INFO  L413           NwaCegarLoop]: 10263 mSDtfsCounter, 22549 mSDsluCounter, 15571 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22549 SdHoareTripleChecker+Valid, 25834 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-11-02 20:50:34,013 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22549 Valid, 25834 Invalid, 22 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-11-02 20:50:34,032 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13769 states.
[2022-11-02 20:50:34,198 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13769 to 6847.
[2022-11-02 20:50:34,210 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6847 states, 6846 states have (on average 1.4994157172071283) internal successors, (10265), 6846 states have internal predecessors, (10265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-02 20:50:34,232 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6847 states to 6847 states and 10265 transitions.
[2022-11-02 20:50:34,233 INFO  L78                 Accepts]: Start accepts. Automaton has 6847 states and 10265 transitions. Word has length 3464
[2022-11-02 20:50:34,239 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:50:34,240 INFO  L495      AbstractCegarLoop]: Abstraction has 6847 states and 10265 transitions.
[2022-11-02 20:50:34,242 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 692.8) internal successors, (3464), 5 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-02 20:50:34,243 INFO  L276                IsEmpty]: Start isEmpty. Operand 6847 states and 10265 transitions.
[2022-11-02 20:50:34,403 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3465
[2022-11-02 20:50:34,404 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:50:34,406 INFO  L195           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2022-11-02 20:50:34,586 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-11-02 20:50:34,606 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:50:34,607 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:50:34,607 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:50:34,609 INFO  L85        PathProgramCache]: Analyzing trace with hash -1088523371, now seen corresponding path program 1 times
[2022-11-02 20:50:34,609 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:50:34,610 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305182020]
[2022-11-02 20:50:34,610 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:50:34,611 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:50:35,968 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:50:35,969 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807552653]
[2022-11-02 20:50:35,970 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:50:35,970 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:50:35,971 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:50:35,974 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:50:36,004 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-11-02 20:50:50,590 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:50:50,893 INFO  L263         TraceCheckSpWp]: Trace formula consists of 36020 conjuncts, 8 conjunts are in the unsatisfiable core
[2022-11-02 20:50:51,062 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:51:21,065 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-02 20:51:21,066 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-02 20:51:21,066 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:51:21,066 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305182020]
[2022-11-02 20:51:21,067 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:51:21,067 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807552653]
[2022-11-02 20:51:21,067 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807552653] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:51:21,067 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:51:21,068 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-02 20:51:21,068 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289516294]
[2022-11-02 20:51:21,068 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:51:21,072 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-02 20:51:21,072 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:51:21,072 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-02 20:51:21,073 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:51:21,075 INFO  L87              Difference]: Start difference. First operand 6847 states and 10265 transitions. Second operand  has 5 states, 5 states have (on average 692.8) internal successors, (3464), 5 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-02 20:51:21,832 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:51:21,833 INFO  L93              Difference]: Finished difference Result 33156 states and 49714 transitions.
[2022-11-02 20:51:21,834 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-11-02 20:51:21,846 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 692.8) internal successors, (3464), 5 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3464
[2022-11-02 20:51:21,859 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:51:21,936 INFO  L225             Difference]: With dead ends: 33156
[2022-11-02 20:51:21,937 INFO  L226             Difference]: Without dead ends: 26313
[2022-11-02 20:51:21,952 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3468 GetRequests, 3462 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2022-11-02 20:51:21,955 INFO  L413           NwaCegarLoop]: 9528 mSDtfsCounter, 23053 mSDsluCounter, 15634 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23053 SdHoareTripleChecker+Valid, 25162 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-11-02 20:51:21,957 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [23053 Valid, 25162 Invalid, 22 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-11-02 20:51:21,982 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 26313 states.
[2022-11-02 20:51:22,355 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 26313 to 12603.
[2022-11-02 20:51:22,377 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12603 states, 12602 states have (on average 1.4995238850976036) internal successors, (18897), 12602 states have internal predecessors, (18897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-02 20:51:22,406 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12603 states to 12603 states and 18897 transitions.
[2022-11-02 20:51:22,406 INFO  L78                 Accepts]: Start accepts. Automaton has 12603 states and 18897 transitions. Word has length 3464
[2022-11-02 20:51:22,410 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:51:22,411 INFO  L495      AbstractCegarLoop]: Abstraction has 12603 states and 18897 transitions.
[2022-11-02 20:51:22,415 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 692.8) internal successors, (3464), 5 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-02 20:51:22,415 INFO  L276                IsEmpty]: Start isEmpty. Operand 12603 states and 18897 transitions.
[2022-11-02 20:51:22,684 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3465
[2022-11-02 20:51:22,685 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:51:22,686 INFO  L195           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2022-11-02 20:51:22,886 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-11-02 20:51:22,902 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:51:22,907 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:51:22,907 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:51:22,908 INFO  L85        PathProgramCache]: Analyzing trace with hash -1630841193, now seen corresponding path program 1 times
[2022-11-02 20:51:22,909 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:51:22,909 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909177656]
[2022-11-02 20:51:22,909 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:51:22,910 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:51:24,031 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:51:24,032 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122559358]
[2022-11-02 20:51:24,033 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:51:24,033 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:51:24,034 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:51:24,039 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:51:24,041 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-11-02 20:51:38,983 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:51:39,285 INFO  L263         TraceCheckSpWp]: Trace formula consists of 36021 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-11-02 20:51:39,397 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:52:20,202 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-02 20:52:20,202 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-02 20:52:20,202 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:52:20,203 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909177656]
[2022-11-02 20:52:20,203 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:52:20,203 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122559358]
[2022-11-02 20:52:20,203 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [122559358] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:52:20,204 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:52:20,204 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-02 20:52:20,205 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496079390]
[2022-11-02 20:52:20,205 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:52:20,209 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-02 20:52:20,209 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:52:20,210 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-02 20:52:20,210 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:52:20,212 INFO  L87              Difference]: Start difference. First operand 12603 states and 18897 transitions. Second operand  has 5 states, 5 states have (on average 692.8) internal successors, (3464), 5 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-02 20:52:21,089 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:52:21,089 INFO  L93              Difference]: Finished difference Result 61368 states and 92020 transitions.
[2022-11-02 20:52:21,091 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-11-02 20:52:21,093 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 692.8) internal successors, (3464), 5 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3464
[2022-11-02 20:52:21,098 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:52:21,183 INFO  L225             Difference]: With dead ends: 61368
[2022-11-02 20:52:21,183 INFO  L226             Difference]: Without dead ends: 48769
[2022-11-02 20:52:21,207 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3468 GetRequests, 3462 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2022-11-02 20:52:21,211 INFO  L413           NwaCegarLoop]: 9318 mSDtfsCounter, 23197 mSDsluCounter, 15652 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23197 SdHoareTripleChecker+Valid, 24970 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-11-02 20:52:21,216 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [23197 Valid, 24970 Invalid, 22 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-11-02 20:52:21,255 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 48769 states.
[2022-11-02 20:52:21,726 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 48769 to 23539.
[2022-11-02 20:52:21,757 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 23539 states, 23538 states have (on average 1.4995751550684) internal successors, (35297), 23538 states have internal predecessors, (35297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-02 20:52:21,815 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 23539 states to 23539 states and 35297 transitions.
[2022-11-02 20:52:21,816 INFO  L78                 Accepts]: Start accepts. Automaton has 23539 states and 35297 transitions. Word has length 3464
[2022-11-02 20:52:21,820 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:52:21,820 INFO  L495      AbstractCegarLoop]: Abstraction has 23539 states and 35297 transitions.
[2022-11-02 20:52:21,821 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 692.8) internal successors, (3464), 5 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-02 20:52:21,822 INFO  L276                IsEmpty]: Start isEmpty. Operand 23539 states and 35297 transitions.
[2022-11-02 20:52:22,062 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3465
[2022-11-02 20:52:22,062 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:52:22,064 INFO  L195           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2022-11-02 20:52:22,258 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-11-02 20:52:22,290 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:52:22,291 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:52:22,291 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:52:22,293 INFO  L85        PathProgramCache]: Analyzing trace with hash -455670123, now seen corresponding path program 1 times
[2022-11-02 20:52:22,293 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:52:22,293 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736844005]
[2022-11-02 20:52:22,294 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:52:22,294 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:52:23,324 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:52:23,324 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [127894679]
[2022-11-02 20:52:23,325 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:52:23,326 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:52:23,326 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:52:23,327 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:52:23,383 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7d3c95-74c5-4025-bd19-be75396e8417/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-11-02 20:52:38,724 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:52:39,001 INFO  L263         TraceCheckSpWp]: Trace formula consists of 36020 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-11-02 20:52:39,084 INFO  L286         TraceCheckSpWp]: Computing forward predicates...