./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.3.prop1-func-interl.c --full-output --architecture 64bit


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


Checking for ERROR reachability
Using default analysis
Version e7bb482b
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_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.3.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP --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 04927dfb69f8ef3367b374404f29bd40a71da3fdb862ae11077fc5d1ad55f1a1
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-e7bb482
[2023-11-06 22:56:21,864 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-06 22:56:21,972 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf
[2023-11-06 22:56:21,976 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-06 22:56:21,977 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-06 22:56:22,007 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-06 22:56:22,008 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-06 22:56:22,008 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-06 22:56:22,009 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-06 22:56:22,010 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-06 22:56:22,011 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-11-06 22:56:22,012 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2023-11-06 22:56:22,012 INFO  L153        SettingsManager]:  * Use SBE=true
[2023-11-06 22:56:22,013 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-06 22:56:22,014 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-06 22:56:22,014 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-06 22:56:22,015 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-06 22:56:22,016 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-06 22:56:22,016 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-06 22:56:22,017 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-06 22:56:22,018 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-06 22:56:22,022 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-06 22:56:22,023 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-06 22:56:22,023 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-11-06 22:56:22,024 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-06 22:56:22,024 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 22:56:22,025 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-06 22:56:22,025 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-06 22:56:22,026 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-11-06 22:56:22,026 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-11-06 22:56:22,027 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-06 22:56:22,027 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-11-06 22:56:22,028 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-06 22:56:22,028 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-11-06 22:56:22,029 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-06 22:56:22,029 INFO  L153        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-11-06 22:56:22,030 INFO  L153        SettingsManager]:  * Looper check in Petri net analysis=SEMANTIC
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_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP/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_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP
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 -> 04927dfb69f8ef3367b374404f29bd40a71da3fdb862ae11077fc5d1ad55f1a1
[2023-11-06 22:56:22,330 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-06 22:56:22,354 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-06 22:56:22,357 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-06 22:56:22,358 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-06 22:56:22,359 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-06 22:56:22,361 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.3.prop1-func-interl.c
[2023-11-06 22:56:25,580 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-06 22:56:26,137 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-06 22:56:26,138 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.3.prop1-func-interl.c
[2023-11-06 22:56:26,173 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP/data/690fcec83/0ac33587bcae4992b7696631f1d21187/FLAG35cb0be35
[2023-11-06 22:56:26,188 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP/data/690fcec83/0ac33587bcae4992b7696631f1d21187
[2023-11-06 22:56:26,191 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-06 22:56:26,192 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-06 22:56:26,194 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-06 22:56:26,194 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-06 22:56:26,200 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-06 22:56:26,200 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:26" (1/1) ...
[2023-11-06 22:56:26,201 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c1d68d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:26, skipping insertion in model container
[2023-11-06 22:56:26,202 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:26" (1/1) ...
[2023-11-06 22:56:26,345 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-06 22:56:26,613 WARN  L240   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.3.prop1-func-interl.c[1173,1186]
[2023-11-06 22:56:27,805 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 22:56:27,818 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-06 22:56:27,827 WARN  L240   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.rether.3.prop1-func-interl.c[1173,1186]
[2023-11-06 22:56:28,670 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-06 22:56:28,703 INFO  L206         MainTranslator]: Completed translation
[2023-11-06 22:56:28,704 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:28 WrapperNode
[2023-11-06 22:56:28,704 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-06 22:56:28,719 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-06 22:56:28,719 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-06 22:56:28,719 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-06 22:56:28,729 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:28" (1/1) ...
[2023-11-06 22:56:28,999 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:28" (1/1) ...
[2023-11-06 22:56:32,252 INFO  L138                Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 29670
[2023-11-06 22:56:32,253 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-06 22:56:32,254 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-06 22:56:32,254 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-06 22:56:32,254 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-06 22:56:32,266 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:28" (1/1) ...
[2023-11-06 22:56:32,267 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:28" (1/1) ...
[2023-11-06 22:56:33,007 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:28" (1/1) ...
[2023-11-06 22:56:33,008 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:28" (1/1) ...
[2023-11-06 22:56:33,949 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:28" (1/1) ...
[2023-11-06 22:56:34,111 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:28" (1/1) ...
[2023-11-06 22:56:34,255 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:28" (1/1) ...
[2023-11-06 22:56:34,498 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:28" (1/1) ...
[2023-11-06 22:56:34,989 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-06 22:56:34,990 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-06 22:56:34,991 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-06 22:56:34,991 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-06 22:56:34,992 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:28" (1/1) ...
[2023-11-06 22:56:34,999 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-06 22:56:35,014 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:56:35,027 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-06 22:56:35,031 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-06 22:56:35,061 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-06 22:56:35,061 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-06 22:56:35,062 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-06 22:56:35,062 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-06 22:56:36,373 INFO  L236             CfgBuilder]: Building ICFG
[2023-11-06 22:56:36,375 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-06 22:56:54,144 INFO  L277             CfgBuilder]: Performing block encoding
[2023-11-06 22:56:54,195 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-06 22:56:54,195 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-11-06 22:56:54,203 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:54 BoogieIcfgContainer
[2023-11-06 22:56:54,203 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-06 22:56:54,206 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-06 22:56:54,207 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-06 22:56:54,210 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-06 22:56:54,210 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:56:26" (1/3) ...
[2023-11-06 22:56:54,211 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c93efe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:54, skipping insertion in model container
[2023-11-06 22:56:54,211 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:28" (2/3) ...
[2023-11-06 22:56:54,212 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c93efe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:54, skipping insertion in model container
[2023-11-06 22:56:54,212 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:54" (3/3) ...
[2023-11-06 22:56:54,213 INFO  L112   eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.rether.3.prop1-func-interl.c
[2023-11-06 22:56:54,233 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-06 22:56:54,234 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-06 22:56:54,444 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-06 22:56:54,452 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;@6336963e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-11-06 22:56:54,453 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-06 22:56:54,479 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 6711 states, 6709 states have (on average 1.6665672976598598) internal successors, (11181), 6710 states have internal predecessors, (11181), 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)
[2023-11-06 22:56:54,526 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 344
[2023-11-06 22:56:54,527 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:56:54,529 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:56:54,531 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:56:54,536 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:56:54,538 INFO  L85        PathProgramCache]: Analyzing trace with hash 1880059842, now seen corresponding path program 1 times
[2023-11-06 22:56:54,549 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:56:54,550 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19200577]
[2023-11-06 22:56:54,551 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:56:54,552 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:56:55,090 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:56:56,829 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:56:56,830 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:56:56,830 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19200577]
[2023-11-06 22:56:56,831 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19200577] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:56:56,831 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:56:56,832 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:56:56,833 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150262715]
[2023-11-06 22:56:56,834 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:56:56,842 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:56:56,842 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:56:56,886 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:56:56,887 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:56:56,906 INFO  L87              Difference]: Start difference. First operand  has 6711 states, 6709 states have (on average 1.6665672976598598) internal successors, (11181), 6710 states have internal predecessors, (11181), 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 85.75) internal successors, (343), 4 states have internal predecessors, (343), 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)
[2023-11-06 22:56:57,330 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:56:57,331 INFO  L93              Difference]: Finished difference Result 13118 states and 21860 transitions.
[2023-11-06 22:56:57,332 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:56:57,334 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 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 343
[2023-11-06 22:56:57,340 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:56:57,391 INFO  L225             Difference]: With dead ends: 13118
[2023-11-06 22:56:57,391 INFO  L226             Difference]: Without dead ends: 6709
[2023-11-06 22:56:57,405 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:56:57,409 INFO  L413           NwaCegarLoop]: 11173 mSDtfsCounter, 1 mSDsluCounter, 22340 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33513 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:56:57,410 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33513 Invalid, 11 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:56:57,444 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6709 states.
[2023-11-06 22:56:57,645 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6709 to 6709.
[2023-11-06 22:56:57,663 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6709 states, 6708 states have (on average 1.6662194394752534) internal successors, (11177), 6708 states have internal predecessors, (11177), 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)
[2023-11-06 22:56:57,692 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6709 states to 6709 states and 11177 transitions.
[2023-11-06 22:56:57,693 INFO  L78                 Accepts]: Start accepts. Automaton has 6709 states and 11177 transitions. Word has length 343
[2023-11-06 22:56:57,695 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:56:57,696 INFO  L495      AbstractCegarLoop]: Abstraction has 6709 states and 11177 transitions.
[2023-11-06 22:56:57,697 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 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)
[2023-11-06 22:56:57,697 INFO  L276                IsEmpty]: Start isEmpty. Operand 6709 states and 11177 transitions.
[2023-11-06 22:56:57,704 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 345
[2023-11-06 22:56:57,705 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:56:57,705 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:56:57,706 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-11-06 22:56:57,706 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:56:57,707 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:56:57,708 INFO  L85        PathProgramCache]: Analyzing trace with hash -1845960066, now seen corresponding path program 1 times
[2023-11-06 22:56:57,708 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:56:57,708 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891562]
[2023-11-06 22:56:57,709 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:56:57,709 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:56:57,921 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:56:58,779 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:56:58,780 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:56:58,781 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891562]
[2023-11-06 22:56:58,781 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891562] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:56:58,781 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:56:58,781 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2023-11-06 22:56:58,782 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207498576]
[2023-11-06 22:56:58,782 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:56:58,785 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2023-11-06 22:56:58,786 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:56:58,786 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2023-11-06 22:56:58,787 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:56:58,787 INFO  L87              Difference]: Start difference. First operand 6709 states and 11177 transitions. Second operand  has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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)
[2023-11-06 22:56:59,181 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:56:59,182 INFO  L93              Difference]: Finished difference Result 13119 states and 21856 transitions.
[2023-11-06 22:56:59,182 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2023-11-06 22:56:59,183 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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 344
[2023-11-06 22:56:59,184 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:56:59,222 INFO  L225             Difference]: With dead ends: 13119
[2023-11-06 22:56:59,222 INFO  L226             Difference]: Without dead ends: 6712
[2023-11-06 22:56:59,237 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2023-11-06 22:56:59,239 INFO  L413           NwaCegarLoop]: 11173 mSDtfsCounter, 1 mSDsluCounter, 22337 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33510 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:56:59,240 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33510 Invalid, 14 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2023-11-06 22:56:59,257 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6712 states.
[2023-11-06 22:56:59,372 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6712 to 6711.
[2023-11-06 22:56:59,394 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6711 states, 6710 states have (on average 1.6660208643815202) internal successors, (11179), 6710 states have internal predecessors, (11179), 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)
[2023-11-06 22:56:59,430 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6711 states to 6711 states and 11179 transitions.
[2023-11-06 22:56:59,430 INFO  L78                 Accepts]: Start accepts. Automaton has 6711 states and 11179 transitions. Word has length 344
[2023-11-06 22:56:59,431 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:56:59,431 INFO  L495      AbstractCegarLoop]: Abstraction has 6711 states and 11179 transitions.
[2023-11-06 22:56:59,432 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 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)
[2023-11-06 22:56:59,433 INFO  L276                IsEmpty]: Start isEmpty. Operand 6711 states and 11179 transitions.
[2023-11-06 22:56:59,439 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 346
[2023-11-06 22:56:59,439 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:56:59,440 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-06 22:56:59,440 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-06 22:56:59,440 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:56:59,441 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:56:59,441 INFO  L85        PathProgramCache]: Analyzing trace with hash -1600617636, now seen corresponding path program 1 times
[2023-11-06 22:56:59,442 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:56:59,442 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088372420]
[2023-11-06 22:56:59,443 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:56:59,443 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:56:59,630 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:57:00,531 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:57:00,532 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:57:00,532 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088372420]
[2023-11-06 22:57:00,532 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088372420] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-06 22:57:00,532 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-06 22:57:00,533 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-11-06 22:57:00,533 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415014787]
[2023-11-06 22:57:00,533 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:57:00,534 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-06 22:57:00,534 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:57:00,535 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-06 22:57:00,535 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-06 22:57:00,536 INFO  L87              Difference]: Start difference. First operand 6711 states and 11179 transitions. Second operand  has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 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)
[2023-11-06 22:57:01,210 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:57:01,210 INFO  L93              Difference]: Finished difference Result 19720 states and 32853 transitions.
[2023-11-06 22:57:01,211 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 22:57:01,211 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 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 345
[2023-11-06 22:57:01,212 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:57:01,293 INFO  L225             Difference]: With dead ends: 19720
[2023-11-06 22:57:01,294 INFO  L226             Difference]: Without dead ends: 13311
[2023-11-06 22:57:01,307 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2023-11-06 22:57:01,313 INFO  L413           NwaCegarLoop]: 11500 mSDtfsCounter, 43164 mSDsluCounter, 22336 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43164 SdHoareTripleChecker+Valid, 33836 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-11-06 22:57:01,314 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [43164 Valid, 33836 Invalid, 20 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-11-06 22:57:01,338 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13311 states.
[2023-11-06 22:57:01,501 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13311 to 6914.
[2023-11-06 22:57:01,514 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6914 states, 6913 states have (on average 1.6658469550122956) internal successors, (11516), 6913 states have internal predecessors, (11516), 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)
[2023-11-06 22:57:01,547 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6914 states to 6914 states and 11516 transitions.
[2023-11-06 22:57:01,548 INFO  L78                 Accepts]: Start accepts. Automaton has 6914 states and 11516 transitions. Word has length 345
[2023-11-06 22:57:01,548 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:57:01,549 INFO  L495      AbstractCegarLoop]: Abstraction has 6914 states and 11516 transitions.
[2023-11-06 22:57:01,550 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 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)
[2023-11-06 22:57:01,554 INFO  L276                IsEmpty]: Start isEmpty. Operand 6914 states and 11516 transitions.
[2023-11-06 22:57:01,801 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4611
[2023-11-06 22:57:01,801 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:57:01,804 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-06 22:57:01,805 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-11-06 22:57:01,805 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:57:01,806 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:57:01,808 INFO  L85        PathProgramCache]: Analyzing trace with hash -1479118948, now seen corresponding path program 1 times
[2023-11-06 22:57:01,808 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:57:01,809 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045378312]
[2023-11-06 22:57:01,810 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:57:01,810 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:57:02,600 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:57:02,600 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070729065]
[2023-11-06 22:57:02,602 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:57:02,602 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:57:02,603 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:57:02,607 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:57:02,623 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-06 22:57:09,132 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:57:09,255 INFO  L262         TraceCheckSpWp]: Trace formula consists of 20492 conjuncts, 17 conjunts are in the unsatisfiable core
[2023-11-06 22:57:09,436 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:57:10,385 INFO  L134       CoverageAnalysis]: Checked inductivity of 140 backedges. 4 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:57:10,386 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-06 22:57:10,715 INFO  L134       CoverageAnalysis]: Checked inductivity of 140 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked.
[2023-11-06 22:57:10,715 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:57:10,716 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045378312]
[2023-11-06 22:57:10,716 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:57:10,716 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070729065]
[2023-11-06 22:57:10,716 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070729065] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-06 22:57:10,717 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-06 22:57:10,720 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12
[2023-11-06 22:57:10,720 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333459720]
[2023-11-06 22:57:10,720 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-06 22:57:10,728 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2023-11-06 22:57:10,729 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:57:10,737 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2023-11-06 22:57:10,738 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132
[2023-11-06 22:57:10,740 INFO  L87              Difference]: Start difference. First operand 6914 states and 11516 transitions. Second operand  has 6 states, 6 states have (on average 746.1666666666666) internal successors, (4477), 6 states have internal predecessors, (4477), 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)
[2023-11-06 22:57:30,019 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-06 22:57:30,020 INFO  L93              Difference]: Finished difference Result 31980 states and 53094 transitions.
[2023-11-06 22:57:30,023 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2023-11-06 22:57:30,025 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 746.1666666666666) internal successors, (4477), 6 states have internal predecessors, (4477), 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 4610
[2023-11-06 22:57:30,035 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-06 22:57:30,070 INFO  L225             Difference]: With dead ends: 31980
[2023-11-06 22:57:30,071 INFO  L226             Difference]: Without dead ends: 19717
[2023-11-06 22:57:30,090 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9219 GetRequests, 9208 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156
[2023-11-06 22:57:30,091 INFO  L413           NwaCegarLoop]: 17773 mSDtfsCounter, 30340 mSDsluCounter, 51529 mSDsCounter, 0 mSdLazyCounter, 19047 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30340 SdHoareTripleChecker+Valid, 69302 SdHoareTripleChecker+Invalid, 19600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 19047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time
[2023-11-06 22:57:30,092 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [30340 Valid, 69302 Invalid, 19600 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [553 Valid, 19047 Invalid, 0 Unknown, 0 Unchecked, 18.0s Time]
[2023-11-06 22:57:30,126 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19717 states.
[2023-11-06 22:57:30,316 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19717 to 6914.
[2023-11-06 22:57:30,335 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6914 states, 6913 states have (on average 1.6658469550122956) internal successors, (11516), 6913 states have internal predecessors, (11516), 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)
[2023-11-06 22:57:30,361 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6914 states to 6914 states and 11516 transitions.
[2023-11-06 22:57:30,361 INFO  L78                 Accepts]: Start accepts. Automaton has 6914 states and 11516 transitions. Word has length 4610
[2023-11-06 22:57:30,371 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-06 22:57:30,371 INFO  L495      AbstractCegarLoop]: Abstraction has 6914 states and 11516 transitions.
[2023-11-06 22:57:30,373 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 746.1666666666666) internal successors, (4477), 6 states have internal predecessors, (4477), 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)
[2023-11-06 22:57:30,373 INFO  L276                IsEmpty]: Start isEmpty. Operand 6914 states and 11516 transitions.
[2023-11-06 22:57:30,626 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 4612
[2023-11-06 22:57:30,626 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-06 22:57:30,630 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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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[2023-11-06 22:57:30,705 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-06 22:57:30,851 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:57:30,851 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-06 22:57:30,852 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-06 22:57:30,854 INFO  L85        PathProgramCache]: Analyzing trace with hash -1303105628, now seen corresponding path program 1 times
[2023-11-06 22:57:30,854 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-11-06 22:57:30,855 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998464868]
[2023-11-06 22:57:30,856 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:57:30,856 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-06 22:57:31,834 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-06 22:57:31,834 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922076601]
[2023-11-06 22:57:31,836 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-06 22:57:31,836 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-06 22:57:31,837 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP/z3
[2023-11-06 22:57:31,838 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-06 22:57:31,867 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5ce5849c-121c-4213-8787-330299b0688a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-06 22:57:38,452 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-06 22:57:38,582 INFO  L262         TraceCheckSpWp]: Trace formula consists of 20495 conjuncts, 154 conjunts are in the unsatisfiable core
[2023-11-06 22:57:38,761 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-06 22:58:09,695 INFO  L134       CoverageAnalysis]: Checked inductivity of 140 backedges. 4 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:58:09,695 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-06 22:59:01,617 INFO  L134       CoverageAnalysis]: Checked inductivity of 140 backedges. 62 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-11-06 22:59:01,617 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-11-06 22:59:01,618 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998464868]
[2023-11-06 22:59:01,618 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-06 22:59:01,618 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922076601]
[2023-11-06 22:59:01,618 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922076601] provided 0 perfect and 2 imperfect interpolant sequences
[2023-11-06 22:59:01,618 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2023-11-06 22:59:01,621 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 34] total 93
[2023-11-06 22:59:01,621 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280407610]
[2023-11-06 22:59:01,622 INFO  L85    oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2023-11-06 22:59:01,633 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 93 states
[2023-11-06 22:59:01,634 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-11-06 22:59:01,646 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants.
[2023-11-06 22:59:01,649 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=722, Invalid=7834, Unknown=0, NotChecked=0, Total=8556
[2023-11-06 22:59:01,653 INFO  L87              Difference]: Start difference. First operand 6914 states and 11516 transitions. Second operand  has 93 states, 93 states have (on average 99.04301075268818) internal successors, (9211), 93 states have internal predecessors, (9211), 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)