./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.1.prop1-back-serstep.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version 5e519f3a
Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/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_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.1.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/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_cb8d9781-70ba-4654-916d-b5cf69aa93ea/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 31822dec7f0d6ab2227e3a145e89ac43ed793cda61605d4e4fb979b56c555af2
--- 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 20:40:23,448 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-11-02 20:40:23,450 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-11-02 20:40:23,476 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-11-02 20:40:23,477 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-11-02 20:40:23,478 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-11-02 20:40:23,480 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-11-02 20:40:23,481 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-11-02 20:40:23,483 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-11-02 20:40:23,484 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-11-02 20:40:23,485 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-11-02 20:40:23,486 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-11-02 20:40:23,487 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-11-02 20:40:23,488 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-11-02 20:40:23,489 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-11-02 20:40:23,490 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-11-02 20:40:23,491 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-11-02 20:40:23,492 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-11-02 20:40:23,494 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-11-02 20:40:23,496 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-11-02 20:40:23,498 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-11-02 20:40:23,505 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-11-02 20:40:23,510 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-11-02 20:40:23,511 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-11-02 20:40:23,518 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-11-02 20:40:23,523 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-11-02 20:40:23,524 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-11-02 20:40:23,525 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-11-02 20:40:23,526 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-11-02 20:40:23,527 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-11-02 20:40:23,528 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-11-02 20:40:23,529 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-11-02 20:40:23,531 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-11-02 20:40:23,532 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-11-02 20:40:23,535 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-11-02 20:40:23,535 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-11-02 20:40:23,536 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-11-02 20:40:23,536 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-11-02 20:40:23,536 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-11-02 20:40:23,537 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-11-02 20:40:23,538 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-11-02 20:40:23,539 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf
[2022-11-02 20:40:23,577 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-11-02 20:40:23,582 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-11-02 20:40:23,583 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-11-02 20:40:23,583 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-11-02 20:40:23,584 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-11-02 20:40:23,584 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-11-02 20:40:23,585 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-11-02 20:40:23,585 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-11-02 20:40:23,585 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-11-02 20:40:23,586 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-11-02 20:40:23,587 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-11-02 20:40:23,587 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-11-02 20:40:23,587 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-11-02 20:40:23,587 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-11-02 20:40:23,588 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-11-02 20:40:23,588 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-11-02 20:40:23,588 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-11-02 20:40:23,588 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-11-02 20:40:23,588 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-11-02 20:40:23,589 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-11-02 20:40:23,589 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-11-02 20:40:23,589 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-02 20:40:23,589 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-11-02 20:40:23,589 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-11-02 20:40:23,590 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-11-02 20:40:23,590 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-11-02 20:40:23,591 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-11-02 20:40:23,592 INFO  L138        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2022-11-02 20:40:23,592 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-11-02 20:40:23,592 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-11-02 20:40:23,592 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_cb8d9781-70ba-4654-916d-b5cf69aa93ea/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_cb8d9781-70ba-4654-916d-b5cf69aa93ea/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 -> 31822dec7f0d6ab2227e3a145e89ac43ed793cda61605d4e4fb979b56c555af2
[2022-11-02 20:40:23,899 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-11-02 20:40:23,923 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-11-02 20:40:23,926 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-11-02 20:40:23,928 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-11-02 20:40:23,929 INFO  L275        PluginConnector]: CDTParser initialized
[2022-11-02 20:40:23,930 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.1.prop1-back-serstep.c
[2022-11-02 20:40:24,017 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/data/0a34e0f06/354b669b7b9747258281ee46b9acca18/FLAGb6540937e
[2022-11-02 20:40:24,962 INFO  L306              CDTParser]: Found 1 translation units.
[2022-11-02 20:40:24,963 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.1.prop1-back-serstep.c
[2022-11-02 20:40:25,017 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/data/0a34e0f06/354b669b7b9747258281ee46b9acca18/FLAGb6540937e
[2022-11-02 20:40:25,408 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/data/0a34e0f06/354b669b7b9747258281ee46b9acca18
[2022-11-02 20:40:25,410 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-11-02 20:40:25,412 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-11-02 20:40:25,413 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-11-02 20:40:25,414 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-11-02 20:40:25,417 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-11-02 20:40:25,418 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:40:25" (1/1) ...
[2022-11-02 20:40:25,419 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36c19a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:25, skipping insertion in model container
[2022-11-02 20:40:25,420 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:40:25" (1/1) ...
[2022-11-02 20:40:25,427 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-11-02 20:40:25,639 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-11-02 20:40:26,051 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_cb8d9781-70ba-4654-916d-b5cf69aa93ea/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.1.prop1-back-serstep.c[1014,1027]
[2022-11-02 20:40:27,446 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-11-02 20:40:27,449 INFO  L203         MainTranslator]: Completed pre-run
[2022-11-02 20:40:27,487 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_cb8d9781-70ba-4654-916d-b5cf69aa93ea/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.1.prop1-back-serstep.c[1014,1027]
[2022-11-02 20:40:28,403 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-11-02 20:40:28,418 INFO  L208         MainTranslator]: Completed translation
[2022-11-02 20:40:28,418 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:28 WrapperNode
[2022-11-02 20:40:28,420 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-11-02 20:40:28,422 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-11-02 20:40:28,422 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-11-02 20:40:28,423 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-11-02 20:40:28,432 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:28" (1/1) ...
[2022-11-02 20:40:28,618 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:28" (1/1) ...
[2022-11-02 20:40:30,280 INFO  L138                Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 21068
[2022-11-02 20:40:30,280 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-11-02 20:40:30,281 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-11-02 20:40:30,281 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-11-02 20:40:30,281 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-11-02 20:40:30,290 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:28" (1/1) ...
[2022-11-02 20:40:30,291 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:28" (1/1) ...
[2022-11-02 20:40:30,497 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:28" (1/1) ...
[2022-11-02 20:40:30,497 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:28" (1/1) ...
[2022-11-02 20:40:31,035 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:28" (1/1) ...
[2022-11-02 20:40:31,099 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:28" (1/1) ...
[2022-11-02 20:40:31,218 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:28" (1/1) ...
[2022-11-02 20:40:31,257 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:28" (1/1) ...
[2022-11-02 20:40:31,514 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-11-02 20:40:31,515 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-11-02 20:40:31,515 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-11-02 20:40:31,515 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-11-02 20:40:31,516 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:28" (1/1) ...
[2022-11-02 20:40:31,523 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-02 20:40:31,534 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:40:31,545 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-11-02 20:40:31,565 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-11-02 20:40:31,583 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-11-02 20:40:31,583 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-11-02 20:40:33,945 INFO  L235             CfgBuilder]: Building ICFG
[2022-11-02 20:40:33,948 INFO  L261             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-11-02 20:41:06,371 INFO  L276             CfgBuilder]: Performing block encoding
[2022-11-02 20:41:06,420 INFO  L295             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-11-02 20:41:06,421 INFO  L300             CfgBuilder]: Removed 1 assume(true) statements.
[2022-11-02 20:41:06,429 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:41:06 BoogieIcfgContainer
[2022-11-02 20:41:06,430 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-11-02 20:41:06,434 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-11-02 20:41:06,435 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-11-02 20:41:06,439 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-11-02 20:41:06,440 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:40:25" (1/3) ...
[2022-11-02 20:41:06,440 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52005392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:41:06, skipping insertion in model container
[2022-11-02 20:41:06,441 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:28" (2/3) ...
[2022-11-02 20:41:06,441 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52005392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:41:06, skipping insertion in model container
[2022-11-02 20:41:06,441 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:41:06" (3/3) ...
[2022-11-02 20:41:06,443 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.rushhour.1.prop1-back-serstep.c
[2022-11-02 20:41:06,471 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-11-02 20:41:06,471 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-11-02 20:41:06,637 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-11-02 20:41:06,643 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;@75139370, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2022-11-02 20:41:06,644 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-11-02 20:41:06,658 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 3037 states, 3035 states have (on average 1.499835255354201) internal successors, (4552), 3036 states have internal predecessors, (4552), 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 20:41:06,663 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2022-11-02 20:41:06,663 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:41:06,663 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2022-11-02 20:41:06,664 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:41:06,669 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:41:06,670 INFO  L85        PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times
[2022-11-02 20:41:06,680 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:41:06,681 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354370668]
[2022-11-02 20:41:06,681 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:41:06,682 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:41:11,046 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:41:24,074 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 20:41:24,074 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:41:24,075 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354370668]
[2022-11-02 20:41:24,075 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354370668] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:41:24,076 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:41:24,076 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-11-02 20:41:24,078 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567375078]
[2022-11-02 20:41:24,078 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:41:24,082 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-02 20:41:24,083 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:41:24,115 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-02 20:41:24,116 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-11-02 20:41:24,125 INFO  L87              Difference]: Start difference. First operand  has 3037 states, 3035 states have (on average 1.499835255354201) internal successors, (4552), 3036 states have internal predecessors, (4552), 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 20:41:26,253 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-11-02 20:41:28,722 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-11-02 20:41:30,771 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 20:41:30,823 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:41:30,823 INFO  L93              Difference]: Finished difference Result 6070 states and 9104 transitions.
[2022-11-02 20:41:30,824 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-11-02 20:41:30,826 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 20:41:30,826 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:41:30,869 INFO  L225             Difference]: With dead ends: 6070
[2022-11-02 20:41:30,870 INFO  L226             Difference]: Without dead ends: 3035
[2022-11-02 20:41:30,884 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
[2022-11-02 20:41:30,890 INFO  L413           NwaCegarLoop]: 4545 mSDtfsCounter, 4541 mSDsluCounter, 4544 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4541 SdHoareTripleChecker+Valid, 9089 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time
[2022-11-02 20:41:30,892 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [4541 Valid, 9089 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 3 Unknown, 0 Unchecked, 6.4s Time]
[2022-11-02 20:41:30,921 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3035 states.
[2022-11-02 20:41:31,058 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 3035.
[2022-11-02 20:41:31,066 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3035 states, 3034 states have (on average 1.4990112063282794) internal successors, (4548), 3034 states have internal predecessors, (4548), 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 20:41:31,079 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3035 states to 3035 states and 4548 transitions.
[2022-11-02 20:41:31,081 INFO  L78                 Accepts]: Start accepts. Automaton has 3035 states and 4548 transitions. Word has length 5
[2022-11-02 20:41:31,081 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:41:31,081 INFO  L495      AbstractCegarLoop]: Abstraction has 3035 states and 4548 transitions.
[2022-11-02 20:41:31,081 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 20:41:31,082 INFO  L276                IsEmpty]: Start isEmpty. Operand 3035 states and 4548 transitions.
[2022-11-02 20:41:31,400 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3035
[2022-11-02 20:41:31,401 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:41:31,403 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]
[2022-11-02 20:41:31,404 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-11-02 20:41:31,404 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:41:31,404 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:41:31,406 INFO  L85        PathProgramCache]: Analyzing trace with hash 908904219, now seen corresponding path program 1 times
[2022-11-02 20:41:31,406 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:41:31,407 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731912333]
[2022-11-02 20:41:31,408 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:41:31,408 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:41:32,826 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:41:32,831 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998483403]
[2022-11-02 20:41:32,832 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:41:32,833 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:41:32,833 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:41:32,839 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:41:32,851 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-11-02 20:41:47,337 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:41:47,607 INFO  L263         TraceCheckSpWp]: Trace formula consists of 33604 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-11-02 20:41:47,770 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:41:48,132 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 20:41:48,133 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-02 20:41:48,133 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:41:48,134 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731912333]
[2022-11-02 20:41:48,134 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:41:48,135 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998483403]
[2022-11-02 20:41:48,135 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998483403] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:41:48,135 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:41:48,136 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-02 20:41:48,138 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171981605]
[2022-11-02 20:41:48,138 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:41:48,143 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-02 20:41:48,144 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:41:48,144 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-02 20:41:48,145 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:41:48,147 INFO  L87              Difference]: Start difference. First operand 3035 states and 4548 transitions. Second operand  has 5 states, 5 states have (on average 606.8) internal successors, (3034), 5 states have internal predecessors, (3034), 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 20:41:48,783 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:41:48,783 INFO  L93              Difference]: Finished difference Result 12078 states and 18103 transitions.
[2022-11-02 20:41:48,784 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-11-02 20:41:48,787 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 606.8) internal successors, (3034), 5 states have internal predecessors, (3034), 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 3034
[2022-11-02 20:41:48,787 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:41:48,819 INFO  L225             Difference]: With dead ends: 12078
[2022-11-02 20:41:48,819 INFO  L226             Difference]: Without dead ends: 9047
[2022-11-02 20:41:48,826 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3038 GetRequests, 3032 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 20:41:48,827 INFO  L413           NwaCegarLoop]: 4662 mSDtfsCounter, 22306 mSDsluCounter, 13815 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22306 SdHoareTripleChecker+Valid, 18477 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-11-02 20:41:48,828 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22306 Valid, 18477 Invalid, 26 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-11-02 20:41:49,011 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9047 states.
[2022-11-02 20:41:49,087 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9047 to 3051.
[2022-11-02 20:41:49,096 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3051 states, 3050 states have (on average 1.498688524590164) internal successors, (4571), 3050 states have internal predecessors, (4571), 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 20:41:49,107 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3051 states to 3051 states and 4571 transitions.
[2022-11-02 20:41:49,107 INFO  L78                 Accepts]: Start accepts. Automaton has 3051 states and 4571 transitions. Word has length 3034
[2022-11-02 20:41:49,110 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:41:49,111 INFO  L495      AbstractCegarLoop]: Abstraction has 3051 states and 4571 transitions.
[2022-11-02 20:41:49,116 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 606.8) internal successors, (3034), 5 states have internal predecessors, (3034), 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 20:41:49,116 INFO  L276                IsEmpty]: Start isEmpty. Operand 3051 states and 4571 transitions.
[2022-11-02 20:41:49,233 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3035
[2022-11-02 20:41:49,233 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:41:49,241 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 20:41:49,430 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2022-11-02 20:41:49,455 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1
[2022-11-02 20:41:49,456 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:41:49,456 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:41:49,457 INFO  L85        PathProgramCache]: Analyzing trace with hash 206665753, now seen corresponding path program 1 times
[2022-11-02 20:41:49,457 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:41:49,458 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500734510]
[2022-11-02 20:41:49,458 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:41:49,458 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:41:50,960 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:41:50,960 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94490920]
[2022-11-02 20:41:50,962 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:41:50,962 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:41:50,962 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:41:50,964 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:41:50,994 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-11-02 20:42:04,954 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:42:05,209 INFO  L263         TraceCheckSpWp]: Trace formula consists of 33603 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-11-02 20:42:05,335 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:42:06,139 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 20:42:06,140 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-02 20:42:06,140 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:42:06,140 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500734510]
[2022-11-02 20:42:06,140 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:42:06,140 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94490920]
[2022-11-02 20:42:06,141 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [94490920] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:42:06,141 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:42:06,141 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-02 20:42:06,142 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165293963]
[2022-11-02 20:42:06,142 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:42:06,145 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-02 20:42:06,146 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:42:06,146 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-02 20:42:06,146 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:42:06,196 INFO  L87              Difference]: Start difference. First operand 3051 states and 4571 transitions. Second operand  has 5 states, 5 states have (on average 606.8) internal successors, (3034), 5 states have internal predecessors, (3034), 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 20:42:06,708 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:42:06,709 INFO  L93              Difference]: Finished difference Result 12406 states and 18590 transitions.
[2022-11-02 20:42:06,710 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-11-02 20:42:06,711 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 606.8) internal successors, (3034), 5 states have internal predecessors, (3034), 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 3034
[2022-11-02 20:42:06,715 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:42:06,748 INFO  L225             Difference]: With dead ends: 12406
[2022-11-02 20:42:06,748 INFO  L226             Difference]: Without dead ends: 9359
[2022-11-02 20:42:06,755 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3038 GetRequests, 3032 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 20:42:06,758 INFO  L413           NwaCegarLoop]: 4848 mSDtfsCounter, 22492 mSDsluCounter, 13629 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22492 SdHoareTripleChecker+Valid, 18477 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-11-02 20:42:06,760 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22492 Valid, 18477 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-11-02 20:42:06,773 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9359 states.
[2022-11-02 20:42:06,861 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9359 to 3269.
[2022-11-02 20:42:06,868 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3269 states, 3268 states have (on average 1.4981640146878825) internal successors, (4896), 3268 states have internal predecessors, (4896), 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 20:42:06,881 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3269 states to 3269 states and 4896 transitions.
[2022-11-02 20:42:06,881 INFO  L78                 Accepts]: Start accepts. Automaton has 3269 states and 4896 transitions. Word has length 3034
[2022-11-02 20:42:06,883 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:42:06,883 INFO  L495      AbstractCegarLoop]: Abstraction has 3269 states and 4896 transitions.
[2022-11-02 20:42:06,885 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 606.8) internal successors, (3034), 5 states have internal predecessors, (3034), 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 20:42:06,885 INFO  L276                IsEmpty]: Start isEmpty. Operand 3269 states and 4896 transitions.
[2022-11-02 20:42:06,950 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3035
[2022-11-02 20:42:06,950 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:42:06,952 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 20:42:07,137 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-11-02 20:42:07,179 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:42:07,180 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:42:07,180 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:42:07,181 INFO  L85        PathProgramCache]: Analyzing trace with hash -1570007525, now seen corresponding path program 1 times
[2022-11-02 20:42:07,182 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:42:07,182 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391443622]
[2022-11-02 20:42:07,183 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:42:07,183 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:42:08,539 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:42:08,539 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410154911]
[2022-11-02 20:42:08,540 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:42:08,541 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:42:08,541 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:42:08,542 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:42:08,568 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-11-02 20:42:22,290 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:42:22,553 INFO  L263         TraceCheckSpWp]: Trace formula consists of 33604 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-11-02 20:42:22,643 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:42:22,814 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 20:42:22,814 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-02 20:42:22,815 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:42:22,815 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391443622]
[2022-11-02 20:42:22,816 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:42:22,816 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410154911]
[2022-11-02 20:42:22,816 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410154911] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:42:22,816 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:42:22,817 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-02 20:42:22,817 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779956071]
[2022-11-02 20:42:22,817 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:42:22,821 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-02 20:42:22,822 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:42:22,823 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-02 20:42:22,824 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:42:22,825 INFO  L87              Difference]: Start difference. First operand 3269 states and 4896 transitions. Second operand  has 5 states, 5 states have (on average 606.8) internal successors, (3034), 5 states have internal predecessors, (3034), 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 20:42:23,336 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:42:23,336 INFO  L93              Difference]: Finished difference Result 12962 states and 19414 transitions.
[2022-11-02 20:42:23,337 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-11-02 20:42:23,338 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 606.8) internal successors, (3034), 5 states have internal predecessors, (3034), 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 3034
[2022-11-02 20:42:23,338 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:42:23,368 INFO  L225             Difference]: With dead ends: 12962
[2022-11-02 20:42:23,368 INFO  L226             Difference]: Without dead ends: 9697
[2022-11-02 20:42:23,375 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3038 GetRequests, 3032 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 20:42:23,376 INFO  L413           NwaCegarLoop]: 4656 mSDtfsCounter, 22300 mSDsluCounter, 13821 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22300 SdHoareTripleChecker+Valid, 18477 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-11-02 20:42:23,377 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22300 Valid, 18477 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-11-02 20:42:23,387 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9697 states.
[2022-11-02 20:42:23,465 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9697 to 3309.
[2022-11-02 20:42:23,470 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3309 states, 3308 states have (on average 1.4969770253929866) internal successors, (4952), 3308 states have internal predecessors, (4952), 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 20:42:23,481 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3309 states to 3309 states and 4952 transitions.
[2022-11-02 20:42:23,482 INFO  L78                 Accepts]: Start accepts. Automaton has 3309 states and 4952 transitions. Word has length 3034
[2022-11-02 20:42:23,483 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:42:23,483 INFO  L495      AbstractCegarLoop]: Abstraction has 3309 states and 4952 transitions.
[2022-11-02 20:42:23,485 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 606.8) internal successors, (3034), 5 states have internal predecessors, (3034), 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 20:42:23,485 INFO  L276                IsEmpty]: Start isEmpty. Operand 3309 states and 4952 transitions.
[2022-11-02 20:42:23,553 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3035
[2022-11-02 20:42:23,553 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:42:23,555 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]
[2022-11-02 20:42:23,703 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-11-02 20:42:23,771 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:42:23,772 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:42:23,777 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:42:23,779 INFO  L85        PathProgramCache]: Analyzing trace with hash -1071410147, now seen corresponding path program 1 times
[2022-11-02 20:42:23,779 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:42:23,779 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396254016]
[2022-11-02 20:42:23,780 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:42:23,780 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:42:25,138 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:42:25,139 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [692333012]
[2022-11-02 20:42:25,140 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:42:25,145 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:42:25,145 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:42:25,149 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:42:25,151 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-11-02 20:42:40,718 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:42:40,989 INFO  L263         TraceCheckSpWp]: Trace formula consists of 33605 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-11-02 20:42:41,071 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:42:42,163 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 20:42:42,164 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-02 20:42:42,164 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:42:42,164 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396254016]
[2022-11-02 20:42:42,164 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:42:42,165 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692333012]
[2022-11-02 20:42:42,165 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [692333012] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:42:42,165 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:42:42,166 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-02 20:42:42,166 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003982655]
[2022-11-02 20:42:42,166 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:42:42,170 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-02 20:42:42,171 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:42:42,171 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-02 20:42:42,171 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:42:42,173 INFO  L87              Difference]: Start difference. First operand 3309 states and 4952 transitions. Second operand  has 5 states, 5 states have (on average 606.8) internal successors, (3034), 5 states have internal predecessors, (3034), 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 20:42:42,596 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:42:42,597 INFO  L93              Difference]: Finished difference Result 13704 states and 20507 transitions.
[2022-11-02 20:42:42,598 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-11-02 20:42:42,599 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 606.8) internal successors, (3034), 5 states have internal predecessors, (3034), 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 3034
[2022-11-02 20:42:42,600 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:42:42,619 INFO  L225             Difference]: With dead ends: 13704
[2022-11-02 20:42:42,619 INFO  L226             Difference]: Without dead ends: 10399
[2022-11-02 20:42:42,626 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3038 GetRequests, 3032 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 20:42:42,627 INFO  L413           NwaCegarLoop]: 4854 mSDtfsCounter, 22498 mSDsluCounter, 13627 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22498 SdHoareTripleChecker+Valid, 18481 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-11-02 20:42:42,628 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22498 Valid, 18481 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-11-02 20:42:42,640 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10399 states.
[2022-11-02 20:42:42,733 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10399 to 3791.
[2022-11-02 20:42:42,738 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3791 states, 3790 states have (on average 1.4952506596306068) internal successors, (5667), 3790 states have internal predecessors, (5667), 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 20:42:42,748 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3791 states to 3791 states and 5667 transitions.
[2022-11-02 20:42:42,748 INFO  L78                 Accepts]: Start accepts. Automaton has 3791 states and 5667 transitions. Word has length 3034
[2022-11-02 20:42:42,749 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:42:42,749 INFO  L495      AbstractCegarLoop]: Abstraction has 3791 states and 5667 transitions.
[2022-11-02 20:42:42,750 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 606.8) internal successors, (3034), 5 states have internal predecessors, (3034), 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 20:42:42,751 INFO  L276                IsEmpty]: Start isEmpty. Operand 3791 states and 5667 transitions.
[2022-11-02 20:42:42,824 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3035
[2022-11-02 20:42:42,824 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:42:42,825 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 20:42:42,981 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2022-11-02 20:42:43,026 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:42:43,026 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:42:43,027 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:42:43,028 INFO  L85        PathProgramCache]: Analyzing trace with hash 1473651995, now seen corresponding path program 1 times
[2022-11-02 20:42:43,028 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:42:43,028 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460058004]
[2022-11-02 20:42:43,028 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:42:43,029 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:42:44,395 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:42:44,395 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220738855]
[2022-11-02 20:42:44,396 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:42:44,397 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:42:44,397 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:42:44,398 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:42:44,415 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2022-11-02 20:42:58,551 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:42:58,824 INFO  L263         TraceCheckSpWp]: Trace formula consists of 33604 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-11-02 20:42:58,890 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:42:59,347 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 20:42:59,347 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-02 20:42:59,348 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:42:59,348 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460058004]
[2022-11-02 20:42:59,348 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:42:59,348 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220738855]
[2022-11-02 20:42:59,348 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [220738855] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:42:59,349 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:42:59,349 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-02 20:42:59,350 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815688797]
[2022-11-02 20:42:59,350 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:42:59,353 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-02 20:42:59,353 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:42:59,353 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-02 20:42:59,354 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:42:59,355 INFO  L87              Difference]: Start difference. First operand 3791 states and 5667 transitions. Second operand  has 5 states, 5 states have (on average 606.8) internal successors, (3034), 5 states have internal predecessors, (3034), 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 20:42:59,770 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:42:59,770 INFO  L93              Difference]: Finished difference Result 15580 states and 23281 transitions.
[2022-11-02 20:42:59,771 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-11-02 20:42:59,771 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 606.8) internal successors, (3034), 5 states have internal predecessors, (3034), 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 3034
[2022-11-02 20:42:59,772 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:42:59,786 INFO  L225             Difference]: With dead ends: 15580
[2022-11-02 20:42:59,786 INFO  L226             Difference]: Without dead ends: 11793
[2022-11-02 20:42:59,791 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3038 GetRequests, 3032 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 20:42:59,792 INFO  L413           NwaCegarLoop]: 4752 mSDtfsCounter, 22396 mSDsluCounter, 13725 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22396 SdHoareTripleChecker+Valid, 18477 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-11-02 20:42:59,792 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22396 Valid, 18477 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-11-02 20:42:59,802 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11793 states.
[2022-11-02 20:42:59,878 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11793 to 4359.
[2022-11-02 20:42:59,883 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4359 states, 4358 states have (on average 1.492198256080771) internal successors, (6503), 4358 states have internal predecessors, (6503), 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 20:42:59,891 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 6503 transitions.
[2022-11-02 20:42:59,891 INFO  L78                 Accepts]: Start accepts. Automaton has 4359 states and 6503 transitions. Word has length 3034
[2022-11-02 20:42:59,892 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:42:59,892 INFO  L495      AbstractCegarLoop]: Abstraction has 4359 states and 6503 transitions.
[2022-11-02 20:42:59,893 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 606.8) internal successors, (3034), 5 states have internal predecessors, (3034), 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 20:42:59,893 INFO  L276                IsEmpty]: Start isEmpty. Operand 4359 states and 6503 transitions.
[2022-11-02 20:42:59,960 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3035
[2022-11-02 20:42:59,960 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:42:59,961 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 20:43:00,119 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2022-11-02 20:43:00,186 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2022-11-02 20:43:00,186 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:43:00,186 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:43:00,188 INFO  L85        PathProgramCache]: Analyzing trace with hash 696202013, now seen corresponding path program 1 times
[2022-11-02 20:43:00,188 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:43:00,188 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686740482]
[2022-11-02 20:43:00,188 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:43:00,189 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:43:01,172 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:43:01,172 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600743321]
[2022-11-02 20:43:01,173 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:43:01,173 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:43:01,174 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:43:01,175 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:43:01,195 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2022-11-02 20:43:14,754 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:43:15,015 INFO  L263         TraceCheckSpWp]: Trace formula consists of 33605 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-11-02 20:43:15,154 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:43:15,555 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 20:43:15,555 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-02 20:43:15,555 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:43:15,555 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686740482]
[2022-11-02 20:43:15,556 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:43:15,556 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600743321]
[2022-11-02 20:43:15,556 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [600743321] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:43:15,556 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:43:15,556 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-02 20:43:15,557 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589630635]
[2022-11-02 20:43:15,557 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:43:15,560 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-02 20:43:15,560 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:43:15,560 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-02 20:43:15,561 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:43:15,562 INFO  L87              Difference]: Start difference. First operand 4359 states and 6503 transitions. Second operand  has 5 states, 5 states have (on average 606.8) internal successors, (3034), 5 states have internal predecessors, (3034), 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 20:43:15,867 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:43:15,868 INFO  L93              Difference]: Finished difference Result 18452 states and 27509 transitions.
[2022-11-02 20:43:15,869 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-11-02 20:43:15,870 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 606.8) internal successors, (3034), 5 states have internal predecessors, (3034), 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 3034
[2022-11-02 20:43:15,870 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:43:15,886 INFO  L225             Difference]: With dead ends: 18452
[2022-11-02 20:43:15,886 INFO  L226             Difference]: Without dead ends: 14097
[2022-11-02 20:43:15,893 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3038 GetRequests, 3032 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 20:43:15,894 INFO  L413           NwaCegarLoop]: 4758 mSDtfsCounter, 22402 mSDsluCounter, 13719 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22402 SdHoareTripleChecker+Valid, 18477 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-11-02 20:43:15,895 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22402 Valid, 18477 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-11-02 20:43:15,906 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14097 states.
[2022-11-02 20:43:15,993 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14097 to 5519.
[2022-11-02 20:43:16,000 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5519 states, 5518 states have (on average 1.488039144617615) internal successors, (8211), 5518 states have internal predecessors, (8211), 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 20:43:16,009 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5519 states to 5519 states and 8211 transitions.
[2022-11-02 20:43:16,009 INFO  L78                 Accepts]: Start accepts. Automaton has 5519 states and 8211 transitions. Word has length 3034
[2022-11-02 20:43:16,010 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:43:16,010 INFO  L495      AbstractCegarLoop]: Abstraction has 5519 states and 8211 transitions.
[2022-11-02 20:43:16,011 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 606.8) internal successors, (3034), 5 states have internal predecessors, (3034), 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 20:43:16,011 INFO  L276                IsEmpty]: Start isEmpty. Operand 5519 states and 8211 transitions.
[2022-11-02 20:43:16,146 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3035
[2022-11-02 20:43:16,147 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:43:16,148 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 20:43:16,289 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2022-11-02 20:43:16,361 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:43:16,362 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:43:16,362 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:43:16,363 INFO  L85        PathProgramCache]: Analyzing trace with hash 145413147, now seen corresponding path program 1 times
[2022-11-02 20:43:16,363 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:43:16,363 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434560699]
[2022-11-02 20:43:16,364 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:43:16,364 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:43:17,419 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:43:17,419 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642574118]
[2022-11-02 20:43:17,420 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:43:17,420 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:43:17,420 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:43:17,427 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:43:17,431 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2022-11-02 20:43:31,686 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:43:31,931 INFO  L263         TraceCheckSpWp]: Trace formula consists of 33604 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-11-02 20:43:31,994 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:43:32,131 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 20:43:32,131 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-02 20:43:32,132 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:43:32,132 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434560699]
[2022-11-02 20:43:32,132 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:43:32,132 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642574118]
[2022-11-02 20:43:32,132 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642574118] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:43:32,133 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:43:32,133 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-02 20:43:32,133 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454337237]
[2022-11-02 20:43:32,134 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:43:32,136 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-02 20:43:32,137 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:43:32,137 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-02 20:43:32,137 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:43:32,138 INFO  L87              Difference]: Start difference. First operand 5519 states and 8211 transitions. Second operand  has 5 states, 5 states have (on average 606.8) internal successors, (3034), 5 states have internal predecessors, (3034), 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 20:43:32,524 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:43:32,524 INFO  L93              Difference]: Finished difference Result 21826 states and 32473 transitions.
[2022-11-02 20:43:32,525 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-11-02 20:43:32,526 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 606.8) internal successors, (3034), 5 states have internal predecessors, (3034), 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 3034
[2022-11-02 20:43:32,526 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:43:32,543 INFO  L225             Difference]: With dead ends: 21826
[2022-11-02 20:43:32,543 INFO  L226             Difference]: Without dead ends: 16311
[2022-11-02 20:43:32,549 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3038 GetRequests, 3032 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 20:43:32,550 INFO  L413           NwaCegarLoop]: 4977 mSDtfsCounter, 21462 mSDsluCounter, 14583 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21462 SdHoareTripleChecker+Valid, 19560 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-11-02 20:43:32,551 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [21462 Valid, 19560 Invalid, 26 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-11-02 20:43:32,562 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16311 states.
[2022-11-02 20:43:32,653 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16311 to 5527.
[2022-11-02 20:43:32,660 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 5527 states, 5526 states have (on average 1.4878754976474846) internal successors, (8222), 5526 states have internal predecessors, (8222), 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 20:43:32,669 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5527 states to 5527 states and 8222 transitions.
[2022-11-02 20:43:32,670 INFO  L78                 Accepts]: Start accepts. Automaton has 5527 states and 8222 transitions. Word has length 3034
[2022-11-02 20:43:32,670 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:43:32,671 INFO  L495      AbstractCegarLoop]: Abstraction has 5527 states and 8222 transitions.
[2022-11-02 20:43:32,671 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 606.8) internal successors, (3034), 5 states have internal predecessors, (3034), 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 20:43:32,672 INFO  L276                IsEmpty]: Start isEmpty. Operand 5527 states and 8222 transitions.
[2022-11-02 20:43:32,738 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3035
[2022-11-02 20:43:32,738 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:43:32,740 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 20:43:32,893 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2022-11-02 20:43:32,955 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7
[2022-11-02 20:43:32,955 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:43:32,956 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:43:32,956 INFO  L85        PathProgramCache]: Analyzing trace with hash 1876506777, now seen corresponding path program 1 times
[2022-11-02 20:43:32,957 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:43:32,957 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971658418]
[2022-11-02 20:43:32,957 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:43:32,957 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:43:33,916 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:43:33,916 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916746710]
[2022-11-02 20:43:33,917 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:43:33,917 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:43:33,917 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:43:33,919 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:43:33,920 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8d9781-70ba-4654-916d-b5cf69aa93ea/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2022-11-02 20:43:48,224 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:43:48,466 INFO  L263         TraceCheckSpWp]: Trace formula consists of 33603 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-11-02 20:43:48,531 INFO  L286         TraceCheckSpWp]: Computing forward predicates...