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


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


Checking for ERROR reachability
Using default analysis
Version 5e519f3a
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/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_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/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_7c268973-d8ba-4444-911c-495468b71902/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 458df6eda44256ee59ae8918a220b97c624d12c8fbf6445ad3d05aee65a1dd22
--- 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 20:45:33,418 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-11-02 20:45:33,420 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-11-02 20:45:33,457 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-11-02 20:45:33,460 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-11-02 20:45:33,465 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-11-02 20:45:33,468 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-11-02 20:45:33,473 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-11-02 20:45:33,476 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-11-02 20:45:33,483 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-11-02 20:45:33,484 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-11-02 20:45:33,487 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-11-02 20:45:33,487 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-11-02 20:45:33,491 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-11-02 20:45:33,493 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-11-02 20:45:33,496 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-11-02 20:45:33,499 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-11-02 20:45:33,500 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-11-02 20:45:33,502 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-11-02 20:45:33,508 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-11-02 20:45:33,509 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-11-02 20:45:33,512 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-11-02 20:45:33,513 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-11-02 20:45:33,515 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-11-02 20:45:33,518 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-11-02 20:45:33,519 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-11-02 20:45:33,519 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-11-02 20:45:33,520 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-11-02 20:45:33,521 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-11-02 20:45:33,522 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-11-02 20:45:33,523 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-11-02 20:45:33,524 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-11-02 20:45:33,524 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-11-02 20:45:33,525 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-11-02 20:45:33,527 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-11-02 20:45:33,527 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-11-02 20:45:33,528 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-11-02 20:45:33,528 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-11-02 20:45:33,529 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-11-02 20:45:33,530 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-11-02 20:45:33,531 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-11-02 20:45:33,532 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf
[2022-11-02 20:45:33,558 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-11-02 20:45:33,559 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-11-02 20:45:33,559 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-11-02 20:45:33,559 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-11-02 20:45:33,560 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-11-02 20:45:33,561 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-11-02 20:45:33,561 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-11-02 20:45:33,562 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-11-02 20:45:33,562 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-11-02 20:45:33,562 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-11-02 20:45:33,563 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-11-02 20:45:33,563 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-11-02 20:45:33,564 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-11-02 20:45:33,564 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-11-02 20:45:33,564 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-11-02 20:45:33,565 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-11-02 20:45:33,565 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-11-02 20:45:33,565 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-11-02 20:45:33,566 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-11-02 20:45:33,566 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-11-02 20:45:33,566 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-11-02 20:45:33,567 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-02 20:45:33,567 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-11-02 20:45:33,567 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-11-02 20:45:33,568 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-11-02 20:45:33,568 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-11-02 20:45:33,568 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-11-02 20:45:33,569 INFO  L138        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2022-11-02 20:45:33,569 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-11-02 20:45:33,569 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-11-02 20:45:33,570 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_7c268973-d8ba-4444-911c-495468b71902/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_7c268973-d8ba-4444-911c-495468b71902/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 -> 458df6eda44256ee59ae8918a220b97c624d12c8fbf6445ad3d05aee65a1dd22
[2022-11-02 20:45:33,901 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-11-02 20:45:33,952 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-11-02 20:45:33,956 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-11-02 20:45:33,959 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-11-02 20:45:33,961 INFO  L275        PluginConnector]: CDTParser initialized
[2022-11-02 20:45:33,963 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-back-serstep.c
[2022-11-02 20:45:34,052 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/data/848fd633a/098deaeee06843cb9229f50e1ba0fc0b/FLAG525e77fa3
[2022-11-02 20:45:35,222 INFO  L306              CDTParser]: Found 1 translation units.
[2022-11-02 20:45:35,223 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-back-serstep.c
[2022-11-02 20:45:35,295 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/data/848fd633a/098deaeee06843cb9229f50e1ba0fc0b/FLAG525e77fa3
[2022-11-02 20:45:35,495 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/data/848fd633a/098deaeee06843cb9229f50e1ba0fc0b
[2022-11-02 20:45:35,498 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-11-02 20:45:35,501 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-11-02 20:45:35,534 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-11-02 20:45:35,534 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-11-02 20:45:35,544 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-11-02 20:45:35,545 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:45:35" (1/1) ...
[2022-11-02 20:45:35,547 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@309c732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:35, skipping insertion in model container
[2022-11-02 20:45:35,547 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:45:35" (1/1) ...
[2022-11-02 20:45:35,555 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-11-02 20:45:35,807 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-11-02 20:45:36,284 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_7c268973-d8ba-4444-911c-495468b71902/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-back-serstep.c[1014,1027]
[2022-11-02 20:45:38,252 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-11-02 20:45:38,256 INFO  L203         MainTranslator]: Completed pre-run
[2022-11-02 20:45:38,272 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_7c268973-d8ba-4444-911c-495468b71902/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rushhour.2.prop1-back-serstep.c[1014,1027]
[2022-11-02 20:45:39,465 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-11-02 20:45:39,480 INFO  L208         MainTranslator]: Completed translation
[2022-11-02 20:45:39,481 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:39 WrapperNode
[2022-11-02 20:45:39,481 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-11-02 20:45:39,483 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-11-02 20:45:39,483 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-11-02 20:45:39,483 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-11-02 20:45:39,492 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:39" (1/1) ...
[2022-11-02 20:45:39,837 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:39" (1/1) ...
[2022-11-02 20:45:41,419 INFO  L138                Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 23942
[2022-11-02 20:45:41,420 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-11-02 20:45:41,421 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-11-02 20:45:41,421 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-11-02 20:45:41,421 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-11-02 20:45:41,433 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:39" (1/1) ...
[2022-11-02 20:45:41,433 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:39" (1/1) ...
[2022-11-02 20:45:41,936 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:39" (1/1) ...
[2022-11-02 20:45:41,940 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:39" (1/1) ...
[2022-11-02 20:45:42,691 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:39" (1/1) ...
[2022-11-02 20:45:42,762 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:39" (1/1) ...
[2022-11-02 20:45:42,834 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:39" (1/1) ...
[2022-11-02 20:45:42,897 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:39" (1/1) ...
[2022-11-02 20:45:43,113 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-11-02 20:45:43,115 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-11-02 20:45:43,115 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-11-02 20:45:43,116 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-11-02 20:45:43,117 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:39" (1/1) ...
[2022-11-02 20:45:43,125 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-02 20:45:43,138 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:45:43,152 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-11-02 20:45:43,191 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-11-02 20:45:43,213 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-11-02 20:45:43,214 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-11-02 20:45:46,292 INFO  L235             CfgBuilder]: Building ICFG
[2022-11-02 20:45:46,295 INFO  L261             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-11-02 20:46:26,282 INFO  L276             CfgBuilder]: Performing block encoding
[2022-11-02 20:46:26,329 INFO  L295             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-11-02 20:46:26,330 INFO  L300             CfgBuilder]: Removed 1 assume(true) statements.
[2022-11-02 20:46:26,336 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:46:26 BoogieIcfgContainer
[2022-11-02 20:46:26,336 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-11-02 20:46:26,338 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-11-02 20:46:26,339 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-11-02 20:46:26,343 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-11-02 20:46:26,344 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:45:35" (1/3) ...
[2022-11-02 20:46:26,345 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da494ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:46:26, skipping insertion in model container
[2022-11-02 20:46:26,345 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:45:39" (2/3) ...
[2022-11-02 20:46:26,346 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da494ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:46:26, skipping insertion in model container
[2022-11-02 20:46:26,346 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:46:26" (3/3) ...
[2022-11-02 20:46:26,348 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.rushhour.2.prop1-back-serstep.c
[2022-11-02 20:46:26,370 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-11-02 20:46:26,370 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-11-02 20:46:26,519 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-11-02 20:46:26,529 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;@58231c02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2022-11-02 20:46:26,530 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-11-02 20:46:26,546 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 3469 states, 3467 states have (on average 1.499855783097779) internal successors, (5200), 3468 states have internal predecessors, (5200), 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 20:46:26,553 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2022-11-02 20:46:26,553 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:46:26,554 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2022-11-02 20:46:26,555 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:46:26,563 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:46:26,563 INFO  L85        PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times
[2022-11-02 20:46:26,574 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:46:26,575 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014890020]
[2022-11-02 20:46:26,576 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:46:26,576 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:46:38,183 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:47:10,759 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 20:47:10,760 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:47:10,760 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014890020]
[2022-11-02 20:47:10,761 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014890020] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:47:10,761 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:47:10,761 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-11-02 20:47:10,763 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447043277]
[2022-11-02 20:47:10,764 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:47:10,768 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-02 20:47:10,769 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:47:10,804 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-02 20:47:10,805 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-11-02 20:47:10,814 INFO  L87              Difference]: Start difference. First operand  has 3469 states, 3467 states have (on average 1.499855783097779) internal successors, (5200), 3468 states have internal predecessors, (5200), 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 20:47:12,730 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-11-02 20:47:15,141 WARN  L539   Checker$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 20:47:16,378 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-11-02 20:47:16,543 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:47:16,544 INFO  L93              Difference]: Finished difference Result 10393 states and 15588 transitions.
[2022-11-02 20:47:16,546 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-11-02 20:47:16,548 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 20:47:16,548 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:47:16,581 INFO  L225             Difference]: With dead ends: 10393
[2022-11-02 20:47:16,581 INFO  L226             Difference]: Without dead ends: 6926
[2022-11-02 20:47:16,590 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:47:16,594 INFO  L413           NwaCegarLoop]: 5192 mSDtfsCounter, 15566 mSDsluCounter, 5193 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15566 SdHoareTripleChecker+Valid, 10385 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time
[2022-11-02 20:47:16,595 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [15566 Valid, 10385 Invalid, 9 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time]
[2022-11-02 20:47:16,622 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6926 states.
[2022-11-02 20:47:16,721 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6926 to 3467.
[2022-11-02 20:47:16,729 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3467 states, 3466 states have (on average 1.499134448932487) internal successors, (5196), 3466 states have internal predecessors, (5196), 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 20:47:16,742 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3467 states to 3467 states and 5196 transitions.
[2022-11-02 20:47:16,744 INFO  L78                 Accepts]: Start accepts. Automaton has 3467 states and 5196 transitions. Word has length 5
[2022-11-02 20:47:16,744 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:47:16,744 INFO  L495      AbstractCegarLoop]: Abstraction has 3467 states and 5196 transitions.
[2022-11-02 20:47:16,744 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 20:47:16,745 INFO  L276                IsEmpty]: Start isEmpty. Operand 3467 states and 5196 transitions.
[2022-11-02 20:47:16,929 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3467
[2022-11-02 20:47:16,930 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:47:16,932 INFO  L195           NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-02 20:47:16,932 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-11-02 20:47:16,932 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:47:16,933 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:47:16,934 INFO  L85        PathProgramCache]: Analyzing trace with hash 532773615, now seen corresponding path program 1 times
[2022-11-02 20:47:16,934 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:47:16,934 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355265193]
[2022-11-02 20:47:16,935 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:47:16,935 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:47:18,250 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:47:18,250 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277961247]
[2022-11-02 20:47:18,251 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:47:18,252 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:47:18,252 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:47:18,259 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:47:18,292 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-11-02 20:47:34,272 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:47:34,546 INFO  L263         TraceCheckSpWp]: Trace formula consists of 38128 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-11-02 20:47:34,690 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:47:35,611 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 20:47:35,612 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-02 20:47:35,612 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:47:35,612 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355265193]
[2022-11-02 20:47:35,613 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:47:35,613 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277961247]
[2022-11-02 20:47:35,613 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277961247] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:47:35,613 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:47:35,614 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-02 20:47:35,615 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223117433]
[2022-11-02 20:47:35,615 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:47:35,620 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-02 20:47:35,621 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:47:35,621 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-02 20:47:35,621 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:47:35,624 INFO  L87              Difference]: Start difference. First operand 3467 states and 5196 transitions. Second operand  has 5 states, 5 states have (on average 693.2) internal successors, (3466), 5 states have internal predecessors, (3466), 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 20:47:36,330 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:47:36,330 INFO  L93              Difference]: Finished difference Result 14062 states and 21079 transitions.
[2022-11-02 20:47:36,332 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2022-11-02 20:47:36,335 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 693.2) internal successors, (3466), 5 states have internal predecessors, (3466), 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 3466
[2022-11-02 20:47:36,336 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:47:36,368 INFO  L225             Difference]: With dead ends: 14062
[2022-11-02 20:47:36,368 INFO  L226             Difference]: Without dead ends: 10599
[2022-11-02 20:47:36,377 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3470 GetRequests, 3464 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 20:47:36,378 INFO  L413           NwaCegarLoop]: 5502 mSDtfsCounter, 25738 mSDsluCounter, 15571 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25738 SdHoareTripleChecker+Valid, 21073 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-11-02 20:47:36,380 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [25738 Valid, 21073 Invalid, 22 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-11-02 20:47:36,395 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10599 states.
[2022-11-02 20:47:36,497 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10599 to 3675.
[2022-11-02 20:47:36,507 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3675 states, 3674 states have (on average 1.4989112683723462) internal successors, (5507), 3674 states have internal predecessors, (5507), 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 20:47:36,520 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3675 states to 3675 states and 5507 transitions.
[2022-11-02 20:47:36,521 INFO  L78                 Accepts]: Start accepts. Automaton has 3675 states and 5507 transitions. Word has length 3466
[2022-11-02 20:47:36,525 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:47:36,525 INFO  L495      AbstractCegarLoop]: Abstraction has 3675 states and 5507 transitions.
[2022-11-02 20:47:36,531 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 693.2) internal successors, (3466), 5 states have internal predecessors, (3466), 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 20:47:36,532 INFO  L276                IsEmpty]: Start isEmpty. Operand 3675 states and 5507 transitions.
[2022-11-02 20:47:36,622 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3467
[2022-11-02 20:47:36,623 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:47:36,630 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 20:47:36,813 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2022-11-02 20:47:36,855 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:47:36,855 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:47:36,856 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:47:36,857 INFO  L85        PathProgramCache]: Analyzing trace with hash 129054701, now seen corresponding path program 1 times
[2022-11-02 20:47:36,857 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:47:36,857 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573343221]
[2022-11-02 20:47:36,858 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:47:36,858 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:47:38,685 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:47:38,686 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579880474]
[2022-11-02 20:47:38,687 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:47:38,687 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:47:38,688 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:47:38,689 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:47:38,691 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-11-02 20:47:53,595 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:47:53,861 INFO  L263         TraceCheckSpWp]: Trace formula consists of 38127 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-11-02 20:47:54,006 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:47:54,811 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 20:47:54,811 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-02 20:47:54,812 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:47:54,812 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573343221]
[2022-11-02 20:47:54,812 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:47:54,812 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579880474]
[2022-11-02 20:47:54,812 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [579880474] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:47:54,812 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:47:54,813 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-02 20:47:54,813 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658103341]
[2022-11-02 20:47:54,814 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:47:54,818 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-02 20:47:54,818 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:47:54,819 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-02 20:47:54,819 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:47:54,821 INFO  L87              Difference]: Start difference. First operand 3675 states and 5507 transitions. Second operand  has 5 states, 5 states have (on average 693.2) internal successors, (3466), 5 states have internal predecessors, (3466), 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 20:47:57,370 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-11-02 20:47:59,376 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-11-02 20:47:59,581 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:47:59,582 INFO  L93              Difference]: Finished difference Result 15084 states and 22607 transitions.
[2022-11-02 20:47:59,583 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-11-02 20:47:59,584 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 693.2) internal successors, (3466), 5 states have internal predecessors, (3466), 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 3466
[2022-11-02 20:47:59,585 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:47:59,615 INFO  L225             Difference]: With dead ends: 15084
[2022-11-02 20:47:59,616 INFO  L226             Difference]: Without dead ends: 11413
[2022-11-02 20:47:59,621 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3470 GetRequests, 3464 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 20:47:59,622 INFO  L413           NwaCegarLoop]: 5496 mSDtfsCounter, 25732 mSDsluCounter, 15573 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25732 SdHoareTripleChecker+Valid, 21069 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time
[2022-11-02 20:47:59,623 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [25732 Valid, 21069 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time]
[2022-11-02 20:47:59,634 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11413 states.
[2022-11-02 20:47:59,722 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11413 to 4079.
[2022-11-02 20:47:59,745 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4079 states, 4078 states have (on average 1.4985286905345758) internal successors, (6111), 4078 states have internal predecessors, (6111), 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 20:47:59,758 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4079 states to 4079 states and 6111 transitions.
[2022-11-02 20:47:59,759 INFO  L78                 Accepts]: Start accepts. Automaton has 4079 states and 6111 transitions. Word has length 3466
[2022-11-02 20:47:59,760 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:47:59,761 INFO  L495      AbstractCegarLoop]: Abstraction has 4079 states and 6111 transitions.
[2022-11-02 20:47:59,763 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 693.2) internal successors, (3466), 5 states have internal predecessors, (3466), 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 20:47:59,763 INFO  L276                IsEmpty]: Start isEmpty. Operand 4079 states and 6111 transitions.
[2022-11-02 20:48:00,048 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3467
[2022-11-02 20:48:00,048 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:48:00,050 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 20:48:00,216 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-11-02 20:48:00,275 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2
[2022-11-02 20:48:00,275 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:48:00,276 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:48:00,277 INFO  L85        PathProgramCache]: Analyzing trace with hash 1208232431, now seen corresponding path program 1 times
[2022-11-02 20:48:00,277 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:48:00,277 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282536752]
[2022-11-02 20:48:00,278 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:48:00,278 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:48:01,602 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:48:01,603 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025037319]
[2022-11-02 20:48:01,604 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:48:01,604 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:48:01,605 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:48:01,605 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:48:01,645 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-11-02 20:48:16,270 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:48:16,556 INFO  L263         TraceCheckSpWp]: Trace formula consists of 38128 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-11-02 20:48:16,682 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:48:16,856 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 20:48:16,857 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-02 20:48:16,857 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:48:16,857 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282536752]
[2022-11-02 20:48:16,857 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:48:16,858 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025037319]
[2022-11-02 20:48:16,858 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025037319] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:48:16,859 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:48:16,860 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-02 20:48:16,860 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417942468]
[2022-11-02 20:48:16,860 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:48:16,865 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-02 20:48:16,865 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:48:16,866 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-02 20:48:16,866 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:48:16,868 INFO  L87              Difference]: Start difference. First operand 4079 states and 6111 transitions. Second operand  has 5 states, 5 states have (on average 693.2) internal successors, (3466), 5 states have internal predecessors, (3466), 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 20:48:17,631 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:48:17,631 INFO  L93              Difference]: Finished difference Result 16108 states and 24133 transitions.
[2022-11-02 20:48:17,632 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-11-02 20:48:17,634 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 693.2) internal successors, (3466), 5 states have internal predecessors, (3466), 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 3466
[2022-11-02 20:48:17,634 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:48:17,657 INFO  L225             Difference]: With dead ends: 16108
[2022-11-02 20:48:17,657 INFO  L226             Difference]: Without dead ends: 12033
[2022-11-02 20:48:17,666 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3470 GetRequests, 3464 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 20:48:17,667 INFO  L413           NwaCegarLoop]: 5310 mSDtfsCounter, 25546 mSDsluCounter, 15759 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25546 SdHoareTripleChecker+Valid, 21069 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-11-02 20:48:17,667 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [25546 Valid, 21069 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-11-02 20:48:17,680 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12033 states.
[2022-11-02 20:48:17,772 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12033 to 4143.
[2022-11-02 20:48:17,779 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4143 states, 4142 states have (on average 1.4975857073877354) internal successors, (6203), 4142 states have internal predecessors, (6203), 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 20:48:17,788 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4143 states to 4143 states and 6203 transitions.
[2022-11-02 20:48:17,788 INFO  L78                 Accepts]: Start accepts. Automaton has 4143 states and 6203 transitions. Word has length 3466
[2022-11-02 20:48:17,789 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:48:17,789 INFO  L495      AbstractCegarLoop]: Abstraction has 4143 states and 6203 transitions.
[2022-11-02 20:48:17,838 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 693.2) internal successors, (3466), 5 states have internal predecessors, (3466), 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 20:48:17,838 INFO  L276                IsEmpty]: Start isEmpty. Operand 4143 states and 6203 transitions.
[2022-11-02 20:48:17,919 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3467
[2022-11-02 20:48:17,919 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:48:17,921 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 20:48:18,077 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-11-02 20:48:18,131 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:48:18,131 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:48:18,132 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:48:18,132 INFO  L85        PathProgramCache]: Analyzing trace with hash 1873151725, now seen corresponding path program 1 times
[2022-11-02 20:48:18,133 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:48:18,133 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786764617]
[2022-11-02 20:48:18,133 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:48:18,133 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:48:19,118 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:48:19,118 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162781903]
[2022-11-02 20:48:19,119 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:48:19,119 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:48:19,120 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:48:19,123 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:48:19,128 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-11-02 20:48:34,758 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:48:35,020 INFO  L263         TraceCheckSpWp]: Trace formula consists of 38127 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-11-02 20:48:35,104 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:48:35,609 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 20:48:35,610 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-02 20:48:35,610 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:48:35,610 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786764617]
[2022-11-02 20:48:35,610 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:48:35,610 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162781903]
[2022-11-02 20:48:35,611 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [162781903] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:48:35,611 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:48:35,611 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-02 20:48:35,612 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855199703]
[2022-11-02 20:48:35,612 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:48:35,616 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-02 20:48:35,616 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:48:35,617 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-02 20:48:35,617 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:48:35,619 INFO  L87              Difference]: Start difference. First operand 4143 states and 6203 transitions. Second operand  has 5 states, 5 states have (on average 693.2) internal successors, (3466), 5 states have internal predecessors, (3466), 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 20:48:36,051 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:48:36,052 INFO  L93              Difference]: Finished difference Result 16940 states and 25361 transitions.
[2022-11-02 20:48:36,053 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-11-02 20:48:36,055 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 693.2) internal successors, (3466), 5 states have internal predecessors, (3466), 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 3466
[2022-11-02 20:48:36,055 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:48:36,079 INFO  L225             Difference]: With dead ends: 16940
[2022-11-02 20:48:36,079 INFO  L226             Difference]: Without dead ends: 12801
[2022-11-02 20:48:36,086 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3470 GetRequests, 3464 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 20:48:36,089 INFO  L413           NwaCegarLoop]: 5406 mSDtfsCounter, 25642 mSDsluCounter, 15663 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25642 SdHoareTripleChecker+Valid, 21069 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 20:48:36,091 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [25642 Valid, 21069 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-11-02 20:48:36,107 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12801 states.
[2022-11-02 20:48:36,206 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12801 to 4655.
[2022-11-02 20:48:36,213 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 4655 states, 4654 states have (on average 1.4961323592608509) internal successors, (6963), 4654 states have internal predecessors, (6963), 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 20:48:36,220 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 6963 transitions.
[2022-11-02 20:48:36,221 INFO  L78                 Accepts]: Start accepts. Automaton has 4655 states and 6963 transitions. Word has length 3466
[2022-11-02 20:48:36,221 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:48:36,222 INFO  L495      AbstractCegarLoop]: Abstraction has 4655 states and 6963 transitions.
[2022-11-02 20:48:36,223 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 693.2) internal successors, (3466), 5 states have internal predecessors, (3466), 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 20:48:36,223 INFO  L276                IsEmpty]: Start isEmpty. Operand 4655 states and 6963 transitions.
[2022-11-02 20:48:36,361 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3467
[2022-11-02 20:48:36,361 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:48:36,362 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 20:48:36,496 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2022-11-02 20:48:36,563 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:48:36,563 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:48:36,563 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:48:36,564 INFO  L85        PathProgramCache]: Analyzing trace with hash 531551211, now seen corresponding path program 1 times
[2022-11-02 20:48:36,564 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:48:36,564 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668461297]
[2022-11-02 20:48:36,565 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:48:36,565 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:48:37,621 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:48:37,621 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105088866]
[2022-11-02 20:48:37,622 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:48:37,622 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:48:37,623 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:48:37,627 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:48:37,629 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c268973-d8ba-4444-911c-495468b71902/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process