./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.4.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_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/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_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.4.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/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_e637df38-fb68-4d64-9f43-80040c58c03d/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 a51a9c223349a85cff6b73829a06d18cb06205648d35f8c1cd196f857336ac66
--- 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 20:57:03,628 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-11-02 20:57:03,632 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-11-02 20:57:03,697 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-11-02 20:57:03,698 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-11-02 20:57:03,703 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-11-02 20:57:03,706 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-11-02 20:57:03,712 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-11-02 20:57:03,715 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-11-02 20:57:03,721 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-11-02 20:57:03,727 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-11-02 20:57:03,728 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-11-02 20:57:03,729 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-11-02 20:57:03,733 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-11-02 20:57:03,736 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-11-02 20:57:03,738 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-11-02 20:57:03,740 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-11-02 20:57:03,742 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-11-02 20:57:03,744 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-11-02 20:57:03,750 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-11-02 20:57:03,752 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-11-02 20:57:03,754 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-11-02 20:57:03,756 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-11-02 20:57:03,757 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-11-02 20:57:03,761 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-11-02 20:57:03,762 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-11-02 20:57:03,762 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-11-02 20:57:03,763 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-11-02 20:57:03,764 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-11-02 20:57:03,765 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-11-02 20:57:03,766 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-11-02 20:57:03,767 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-11-02 20:57:03,768 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-11-02 20:57:03,769 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-11-02 20:57:03,771 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-11-02 20:57:03,771 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-11-02 20:57:03,772 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-11-02 20:57:03,772 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-11-02 20:57:03,773 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-11-02 20:57:03,774 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-11-02 20:57:03,775 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-11-02 20:57:03,776 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf
[2022-11-02 20:57:03,801 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-11-02 20:57:03,801 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-11-02 20:57:03,802 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-11-02 20:57:03,802 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-11-02 20:57:03,803 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-11-02 20:57:03,803 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-11-02 20:57:03,804 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-11-02 20:57:03,805 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-11-02 20:57:03,805 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-11-02 20:57:03,805 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-11-02 20:57:03,806 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-11-02 20:57:03,806 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-11-02 20:57:03,807 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-11-02 20:57:03,807 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-11-02 20:57:03,807 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-11-02 20:57:03,808 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-11-02 20:57:03,808 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-11-02 20:57:03,808 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-11-02 20:57:03,809 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-11-02 20:57:03,809 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-11-02 20:57:03,809 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-11-02 20:57:03,810 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-02 20:57:03,810 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-11-02 20:57:03,810 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-11-02 20:57:03,811 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-11-02 20:57:03,811 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-11-02 20:57:03,811 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-11-02 20:57:03,812 INFO  L138        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2022-11-02 20:57:03,812 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-11-02 20:57:03,812 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-11-02 20:57:03,812 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_e637df38-fb68-4d64-9f43-80040c58c03d/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_e637df38-fb68-4d64-9f43-80040c58c03d/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 -> a51a9c223349a85cff6b73829a06d18cb06205648d35f8c1cd196f857336ac66
[2022-11-02 20:57:04,146 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-11-02 20:57:04,175 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-11-02 20:57:04,178 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-11-02 20:57:04,180 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-11-02 20:57:04,181 INFO  L275        PluginConnector]: CDTParser initialized
[2022-11-02 20:57:04,183 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.4.prop1-back-serstep.c
[2022-11-02 20:57:04,268 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/data/01d9ff446/1363e454fbdd44cc84827244c87ac0b6/FLAGd5d4ad2c0
[2022-11-02 20:57:05,026 INFO  L306              CDTParser]: Found 1 translation units.
[2022-11-02 20:57:05,027 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.4.prop1-back-serstep.c
[2022-11-02 20:57:05,057 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/data/01d9ff446/1363e454fbdd44cc84827244c87ac0b6/FLAGd5d4ad2c0
[2022-11-02 20:57:05,197 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/data/01d9ff446/1363e454fbdd44cc84827244c87ac0b6
[2022-11-02 20:57:05,201 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-11-02 20:57:05,203 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-11-02 20:57:05,208 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-11-02 20:57:05,209 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-11-02 20:57:05,213 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-11-02 20:57:05,214 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:57:05" (1/1) ...
[2022-11-02 20:57:05,216 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d6431ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:57:05, skipping insertion in model container
[2022-11-02 20:57:05,216 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:57:05" (1/1) ...
[2022-11-02 20:57:05,225 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-11-02 20:57:05,311 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-11-02 20:57:05,591 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_e637df38-fb68-4d64-9f43-80040c58c03d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.4.prop1-back-serstep.c[1014,1027]
[2022-11-02 20:57:06,175 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-11-02 20:57:06,179 INFO  L203         MainTranslator]: Completed pre-run
[2022-11-02 20:57:06,192 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_e637df38-fb68-4d64-9f43-80040c58c03d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.4.prop1-back-serstep.c[1014,1027]
[2022-11-02 20:57:06,422 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-11-02 20:57:06,437 INFO  L208         MainTranslator]: Completed translation
[2022-11-02 20:57:06,438 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:57:06 WrapperNode
[2022-11-02 20:57:06,440 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-11-02 20:57:06,441 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-11-02 20:57:06,442 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-11-02 20:57:06,442 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-11-02 20:57:06,452 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:57:06" (1/1) ...
[2022-11-02 20:57:06,532 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:57:06" (1/1) ...
[2022-11-02 20:57:06,869 INFO  L138                Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1766
[2022-11-02 20:57:06,870 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-11-02 20:57:06,871 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-11-02 20:57:06,871 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-11-02 20:57:06,871 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-11-02 20:57:06,884 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:57:06" (1/1) ...
[2022-11-02 20:57:06,885 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:57:06" (1/1) ...
[2022-11-02 20:57:06,920 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:57:06" (1/1) ...
[2022-11-02 20:57:06,920 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:57:06" (1/1) ...
[2022-11-02 20:57:07,130 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:57:06" (1/1) ...
[2022-11-02 20:57:07,156 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:57:06" (1/1) ...
[2022-11-02 20:57:07,187 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:57:06" (1/1) ...
[2022-11-02 20:57:07,210 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:57:06" (1/1) ...
[2022-11-02 20:57:07,254 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-11-02 20:57:07,255 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-11-02 20:57:07,256 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-11-02 20:57:07,256 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-11-02 20:57:07,257 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:57:06" (1/1) ...
[2022-11-02 20:57:07,266 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-02 20:57:07,285 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:57:07,304 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-11-02 20:57:07,314 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-11-02 20:57:07,363 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-11-02 20:57:07,363 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-11-02 20:57:07,991 INFO  L235             CfgBuilder]: Building ICFG
[2022-11-02 20:57:07,993 INFO  L261             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-11-02 20:57:44,970 INFO  L276             CfgBuilder]: Performing block encoding
[2022-11-02 20:57:44,984 INFO  L295             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-11-02 20:57:44,984 INFO  L300             CfgBuilder]: Removed 1 assume(true) statements.
[2022-11-02 20:57:44,987 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:57:44 BoogieIcfgContainer
[2022-11-02 20:57:44,994 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-11-02 20:57:44,996 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-11-02 20:57:44,996 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-11-02 20:57:45,019 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-11-02 20:57:45,020 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:57:05" (1/3) ...
[2022-11-02 20:57:45,020 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12add7db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:57:45, skipping insertion in model container
[2022-11-02 20:57:45,021 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:57:06" (2/3) ...
[2022-11-02 20:57:45,021 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12add7db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:57:45, skipping insertion in model container
[2022-11-02 20:57:45,021 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:57:44" (3/3) ...
[2022-11-02 20:57:45,023 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.protocols.4.prop1-back-serstep.c
[2022-11-02 20:57:45,062 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-11-02 20:57:45,062 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-11-02 20:57:45,142 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-11-02 20:57:45,150 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;@2e2f7f53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2022-11-02 20:57:45,151 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-11-02 20:57:45,156 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 59 states, 57 states have (on average 1.4912280701754386) internal successors, (85), 58 states have internal predecessors, (85), 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 20:57:45,174 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2022-11-02 20:57:45,175 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:57:45,175 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2022-11-02 20:57:45,186 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:57:45,193 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:57:45,193 INFO  L85        PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times
[2022-11-02 20:57:45,204 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:57:45,204 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248970510]
[2022-11-02 20:57:45,205 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:57:45,205 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:57:45,936 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:57:55,633 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 20:57:55,634 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:57:55,635 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248970510]
[2022-11-02 20:57:55,636 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248970510] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:57:55,637 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:57:55,637 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-11-02 20:57:55,639 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608477018]
[2022-11-02 20:57:55,642 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:57:55,647 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-02 20:57:55,648 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:57:55,695 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-02 20:57:55,696 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-11-02 20:57:55,699 INFO  L87              Difference]: Start difference. First operand  has 59 states, 57 states have (on average 1.4912280701754386) internal successors, (85), 58 states have internal predecessors, (85), 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 20:57:58,541 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-11-02 20:57:59,906 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-11-02 20:57:59,907 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:57:59,907 INFO  L93              Difference]: Finished difference Result 163 states and 243 transitions.
[2022-11-02 20:57:59,950 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-11-02 20:57:59,951 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 20:57:59,951 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:57:59,961 INFO  L225             Difference]: With dead ends: 163
[2022-11-02 20:57:59,961 INFO  L226             Difference]: Without dead ends: 106
[2022-11-02 20:57:59,964 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:57:59,968 INFO  L413           NwaCegarLoop]: 77 mSDtfsCounter, 221 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time
[2022-11-02 20:57:59,970 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 155 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time]
[2022-11-02 20:57:59,989 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 106 states.
[2022-11-02 20:58:00,008 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 57.
[2022-11-02 20:58:00,010 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 57 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 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 20:58:00,011 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 81 transitions.
[2022-11-02 20:58:00,013 INFO  L78                 Accepts]: Start accepts. Automaton has 57 states and 81 transitions. Word has length 5
[2022-11-02 20:58:00,014 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:58:00,014 INFO  L495      AbstractCegarLoop]: Abstraction has 57 states and 81 transitions.
[2022-11-02 20:58:00,014 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 20:58:00,015 INFO  L276                IsEmpty]: Start isEmpty. Operand 57 states and 81 transitions.
[2022-11-02 20:58:00,016 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2022-11-02 20:58:00,017 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:58:00,017 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]
[2022-11-02 20:58:00,018 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-11-02 20:58:00,018 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:58:00,019 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:58:00,019 INFO  L85        PathProgramCache]: Analyzing trace with hash -816637943, now seen corresponding path program 1 times
[2022-11-02 20:58:00,020 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:58:00,020 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979974114]
[2022-11-02 20:58:00,020 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:58:00,021 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:58:00,373 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:58:00,374 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255078888]
[2022-11-02 20:58:00,374 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:58:00,375 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:58:00,375 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:58:00,377 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:58:00,380 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-11-02 20:58:02,083 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:58:02,119 INFO  L263         TraceCheckSpWp]: Trace formula consists of 3118 conjuncts, 6 conjunts are in the unsatisfiable core
[2022-11-02 20:58:02,145 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:58:02,313 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 20:58:02,316 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-02 20:58:02,317 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:58:02,318 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979974114]
[2022-11-02 20:58:02,321 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:58:02,322 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255078888]
[2022-11-02 20:58:02,323 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255078888] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:58:02,325 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:58:02,325 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-02 20:58:02,327 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706198247]
[2022-11-02 20:58:02,327 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:58:02,328 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-02 20:58:02,329 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:58:02,330 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-02 20:58:02,331 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:58:02,333 INFO  L87              Difference]: Start difference. First operand 57 states and 81 transitions. Second operand  has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 20:58:06,089 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 20:58:07,394 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:58:07,394 INFO  L93              Difference]: Finished difference Result 191 states and 275 transitions.
[2022-11-02 20:58:07,395 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2022-11-02 20:58:07,395 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 56
[2022-11-02 20:58:07,396 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:58:07,397 INFO  L225             Difference]: With dead ends: 191
[2022-11-02 20:58:07,398 INFO  L226             Difference]: Without dead ends: 138
[2022-11-02 20:58:07,398 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72
[2022-11-02 20:58:07,400 INFO  L413           NwaCegarLoop]: 101 mSDtfsCounter, 150 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time
[2022-11-02 20:58:07,401 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 399 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time]
[2022-11-02 20:58:07,402 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 138 states.
[2022-11-02 20:58:07,412 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 63.
[2022-11-02 20:58:07,416 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 63 states, 62 states have (on average 1.435483870967742) internal successors, (89), 62 states have internal predecessors, (89), 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 20:58:07,418 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 89 transitions.
[2022-11-02 20:58:07,422 INFO  L78                 Accepts]: Start accepts. Automaton has 63 states and 89 transitions. Word has length 56
[2022-11-02 20:58:07,422 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:58:07,423 INFO  L495      AbstractCegarLoop]: Abstraction has 63 states and 89 transitions.
[2022-11-02 20:58:07,424 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 20:58:07,424 INFO  L276                IsEmpty]: Start isEmpty. Operand 63 states and 89 transitions.
[2022-11-02 20:58:07,427 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2022-11-02 20:58:07,428 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:58:07,428 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]
[2022-11-02 20:58:07,488 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2022-11-02 20:58:07,650 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:58:07,650 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:58:07,651 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:58:07,651 INFO  L85        PathProgramCache]: Analyzing trace with hash 569565451, now seen corresponding path program 1 times
[2022-11-02 20:58:07,651 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:58:07,652 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457390534]
[2022-11-02 20:58:07,652 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:58:07,652 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:58:08,068 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:58:08,069 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571858121]
[2022-11-02 20:58:08,069 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:58:08,070 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:58:08,070 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:58:08,072 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:58:08,080 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-11-02 20:58:10,006 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:58:10,039 INFO  L263         TraceCheckSpWp]: Trace formula consists of 3119 conjuncts, 8 conjunts are in the unsatisfiable core
[2022-11-02 20:58:10,055 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:58:10,170 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 20:58:10,171 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-02 20:58:10,171 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:58:10,172 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457390534]
[2022-11-02 20:58:10,172 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:58:10,172 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571858121]
[2022-11-02 20:58:10,173 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [571858121] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:58:10,173 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:58:10,173 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-02 20:58:10,173 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252877926]
[2022-11-02 20:58:10,174 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:58:10,174 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-02 20:58:10,175 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:58:10,175 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-02 20:58:10,176 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:58:10,176 INFO  L87              Difference]: Start difference. First operand 63 states and 89 transitions. Second operand  has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 20:58:12,233 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-11-02 20:58:15,163 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-11-02 20:58:17,207 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-11-02 20:58:19,168 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-11-02 20:58:20,353 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:58:20,353 INFO  L93              Difference]: Finished difference Result 209 states and 299 transitions.
[2022-11-02 20:58:20,354 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-11-02 20:58:20,354 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 56
[2022-11-02 20:58:20,355 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:58:20,356 INFO  L225             Difference]: With dead ends: 209
[2022-11-02 20:58:20,356 INFO  L226             Difference]: Without dead ends: 150
[2022-11-02 20:58:20,357 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 52 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 20:58:20,358 INFO  L413           NwaCegarLoop]: 126 mSDtfsCounter, 191 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time
[2022-11-02 20:58:20,358 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 416 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 3 Unknown, 0 Unchecked, 10.1s Time]
[2022-11-02 20:58:20,359 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 150 states.
[2022-11-02 20:58:20,366 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 71.
[2022-11-02 20:58:20,366 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 71 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 70 states have internal predecessors, (100), 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 20:58:20,370 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions.
[2022-11-02 20:58:20,370 INFO  L78                 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 56
[2022-11-02 20:58:20,371 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:58:20,371 INFO  L495      AbstractCegarLoop]: Abstraction has 71 states and 100 transitions.
[2022-11-02 20:58:20,371 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 20:58:20,371 INFO  L276                IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions.
[2022-11-02 20:58:20,373 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2022-11-02 20:58:20,373 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:58:20,373 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]
[2022-11-02 20:58:20,438 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-11-02 20:58:20,598 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:58:20,598 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:58:20,599 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:58:20,599 INFO  L85        PathProgramCache]: Analyzing trace with hash -2137053943, now seen corresponding path program 1 times
[2022-11-02 20:58:20,599 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:58:20,600 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088101878]
[2022-11-02 20:58:20,600 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:58:20,600 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:58:20,894 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:58:20,895 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502749579]
[2022-11-02 20:58:20,895 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:58:20,895 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:58:20,895 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:58:20,897 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:58:20,914 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-11-02 20:58:52,736 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:58:52,802 INFO  L263         TraceCheckSpWp]: Trace formula consists of 3118 conjuncts, 25 conjunts are in the unsatisfiable core
[2022-11-02 20:58:52,814 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:58:53,158 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 20:58:53,158 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-02 20:58:53,159 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:58:53,159 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088101878]
[2022-11-02 20:58:53,159 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:58:53,159 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502749579]
[2022-11-02 20:58:53,160 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502749579] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:58:53,160 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:58:53,160 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-02 20:58:53,160 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042973365]
[2022-11-02 20:58:53,160 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:58:53,161 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-02 20:58:53,161 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:58:53,162 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-02 20:58:53,162 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:58:53,163 INFO  L87              Difference]: Start difference. First operand 71 states and 100 transitions. Second operand  has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 20:58:54,820 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []
[2022-11-02 20:58:56,325 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:58:56,325 INFO  L93              Difference]: Finished difference Result 266 states and 381 transitions.
[2022-11-02 20:58:56,326 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-11-02 20:58:56,326 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 56
[2022-11-02 20:58:56,326 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:58:56,328 INFO  L225             Difference]: With dead ends: 266
[2022-11-02 20:58:56,328 INFO  L226             Difference]: Without dead ends: 199
[2022-11-02 20:58:56,329 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2022-11-02 20:58:56,330 INFO  L413           NwaCegarLoop]: 143 mSDtfsCounter, 173 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time
[2022-11-02 20:58:56,330 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 288 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time]
[2022-11-02 20:58:56,333 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 199 states.
[2022-11-02 20:58:56,341 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 133.
[2022-11-02 20:58:56,342 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 133 states, 132 states have (on average 1.4393939393939394) internal successors, (190), 132 states have internal predecessors, (190), 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 20:58:56,343 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 190 transitions.
[2022-11-02 20:58:56,343 INFO  L78                 Accepts]: Start accepts. Automaton has 133 states and 190 transitions. Word has length 56
[2022-11-02 20:58:56,343 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:58:56,344 INFO  L495      AbstractCegarLoop]: Abstraction has 133 states and 190 transitions.
[2022-11-02 20:58:56,344 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 20:58:56,344 INFO  L276                IsEmpty]: Start isEmpty. Operand 133 states and 190 transitions.
[2022-11-02 20:58:56,345 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2022-11-02 20:58:56,346 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-02 20:58:56,346 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]
[2022-11-02 20:58:56,529 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-11-02 20:58:56,554 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:58:56,554 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:58:56,555 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:58:56,555 INFO  L85        PathProgramCache]: Analyzing trace with hash -2135206901, now seen corresponding path program 1 times
[2022-11-02 20:58:56,555 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:58:56,555 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086740864]
[2022-11-02 20:58:56,555 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:58:56,555 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:58:56,786 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:58:56,786 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130594444]
[2022-11-02 20:58:56,786 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:58:56,787 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:58:56,787 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:58:56,788 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:58:56,809 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e637df38-fb68-4d64-9f43-80040c58c03d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-11-02 21:00:48,154 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 21:00:48,306 INFO  L263         TraceCheckSpWp]: Trace formula consists of 3119 conjuncts, 131 conjunts are in the unsatisfiable core
[2022-11-02 21:00:48,325 INFO  L286         TraceCheckSpWp]: Computing forward predicates...