./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version a0165632
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_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8a7308dc5f86f1f4eda090a45a8f84359680ddfad7d17e2c5273bd494b2cbe5e
--- Real Ultimate output ---
This is Ultimate 0.2.5-dev-a016563
[2024-11-09 01:19:11,292 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2024-11-09 01:19:11,405 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf
[2024-11-09 01:19:11,412 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2024-11-09 01:19:11,414 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2024-11-09 01:19:11,452 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2024-11-09 01:19:11,453 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2024-11-09 01:19:11,453 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2024-11-09 01:19:11,454 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-11-09 01:19:11,456 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-11-09 01:19:11,457 INFO  L153        SettingsManager]:  * User list type=DISABLED
[2024-11-09 01:19:11,458 INFO  L151        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2024-11-09 01:19:11,458 INFO  L153        SettingsManager]:  * Explicit value domain=true
[2024-11-09 01:19:11,458 INFO  L153        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2024-11-09 01:19:11,459 INFO  L153        SettingsManager]:  * Octagon Domain=false
[2024-11-09 01:19:11,459 INFO  L153        SettingsManager]:  * Abstract domain=CompoundDomain
[2024-11-09 01:19:11,459 INFO  L153        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2024-11-09 01:19:11,460 INFO  L153        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2024-11-09 01:19:11,460 INFO  L153        SettingsManager]:  * Interval Domain=false
[2024-11-09 01:19:11,460 INFO  L151        SettingsManager]: Preferences of Sifa differ from their defaults:
[2024-11-09 01:19:11,461 INFO  L153        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2024-11-09 01:19:11,466 INFO  L153        SettingsManager]:  * Simplification Technique=POLY_PAC
[2024-11-09 01:19:11,467 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-11-09 01:19:11,467 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2024-11-09 01:19:11,467 INFO  L153        SettingsManager]:  * sizeof long=4
[2024-11-09 01:19:11,469 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2024-11-09 01:19:11,469 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2024-11-09 01:19:11,469 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2024-11-09 01:19:11,470 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2024-11-09 01:19:11,470 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-11-09 01:19:11,471 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2024-11-09 01:19:11,471 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2024-11-09 01:19:11,472 INFO  L153        SettingsManager]:  * sizeof long double=12
[2024-11-09 01:19:11,472 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2024-11-09 01:19:11,472 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2024-11-09 01:19:11,473 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-11-09 01:19:11,473 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2024-11-09 01:19:11,473 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2024-11-09 01:19:11,473 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2024-11-09 01:19:11,474 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-11-09 01:19:11,474 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2024-11-09 01:19:11,474 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2024-11-09 01:19:11,475 INFO  L153        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2024-11-09 01:19:11,475 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2024-11-09 01:19:11,476 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2024-11-09 01:19:11,476 INFO  L153        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2024-11-09 01:19:11,477 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2024-11-09 01:19:11,477 INFO  L153        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
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_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/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_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness
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 -> Taipan
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a7308dc5f86f1f4eda090a45a8f84359680ddfad7d17e2c5273bd494b2cbe5e
[2024-11-09 01:19:11,737 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2024-11-09 01:19:11,764 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-11-09 01:19:11,768 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-11-09 01:19:11,770 INFO  L270        PluginConnector]: Initializing CDTParser...
[2024-11-09 01:19:11,771 INFO  L274        PluginConnector]: CDTParser initialized
[2024-11-09 01:19:11,772 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c
Unable to find full path for "g++"
[2024-11-09 01:19:13,900 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2024-11-09 01:19:14,177 INFO  L384              CDTParser]: Found 1 translation units.
[2024-11-09 01:19:14,178 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c
[2024-11-09 01:19:14,189 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/data/e9d119927/66cf4853cf7e4fc49adb1164d002d1cb/FLAG44727b9b4
[2024-11-09 01:19:14,208 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/data/e9d119927/66cf4853cf7e4fc49adb1164d002d1cb
[2024-11-09 01:19:14,210 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-11-09 01:19:14,212 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2024-11-09 01:19:14,213 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-11-09 01:19:14,214 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-11-09 01:19:14,220 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2024-11-09 01:19:14,221 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:19:14" (1/1) ...
[2024-11-09 01:19:14,222 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b43cf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14, skipping insertion in model container
[2024-11-09 01:19:14,222 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:19:14" (1/1) ...
[2024-11-09 01:19:14,301 INFO  L175         MainTranslator]: Built tables and reachable declarations
[2024-11-09 01:19:14,573 WARN  L250   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_45d0f758-a101-4dee-bc06-dc67248b0b86/sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c[12131,12144]
[2024-11-09 01:19:14,589 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-09 01:19:14,616 INFO  L200         MainTranslator]: Completed pre-run
[2024-11-09 01:19:14,681 WARN  L250   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_45d0f758-a101-4dee-bc06-dc67248b0b86/sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c[12131,12144]
[2024-11-09 01:19:14,689 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-09 01:19:14,709 INFO  L204         MainTranslator]: Completed translation
[2024-11-09 01:19:14,709 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14 WrapperNode
[2024-11-09 01:19:14,710 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-11-09 01:19:14,711 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-11-09 01:19:14,711 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-11-09 01:19:14,711 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2024-11-09 01:19:14,719 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (1/1) ...
[2024-11-09 01:19:14,731 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (1/1) ...
[2024-11-09 01:19:14,766 INFO  L138                Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 613
[2024-11-09 01:19:14,767 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-11-09 01:19:14,767 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-11-09 01:19:14,768 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2024-11-09 01:19:14,768 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2024-11-09 01:19:14,778 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (1/1) ...
[2024-11-09 01:19:14,778 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (1/1) ...
[2024-11-09 01:19:14,782 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (1/1) ...
[2024-11-09 01:19:14,782 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (1/1) ...
[2024-11-09 01:19:14,794 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (1/1) ...
[2024-11-09 01:19:14,798 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (1/1) ...
[2024-11-09 01:19:14,800 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (1/1) ...
[2024-11-09 01:19:14,802 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (1/1) ...
[2024-11-09 01:19:14,806 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-11-09 01:19:14,807 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-11-09 01:19:14,808 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2024-11-09 01:19:14,808 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2024-11-09 01:19:14,809 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (1/1) ...
[2024-11-09 01:19:14,815 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2024-11-09 01:19:14,828 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3
[2024-11-09 01:19:14,842 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2024-11-09 01:19:14,849 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2024-11-09 01:19:14,872 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-11-09 01:19:14,873 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2024-11-09 01:19:14,873 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-11-09 01:19:14,873 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-11-09 01:19:14,986 INFO  L238             CfgBuilder]: Building ICFG
[2024-11-09 01:19:14,988 INFO  L264             CfgBuilder]: Building CFG for each procedure with an implementation
[2024-11-09 01:19:15,386 INFO  L?                        ?]: Removed 179 outVars from TransFormulas that were not future-live.
[2024-11-09 01:19:15,386 INFO  L287             CfgBuilder]: Performing block encoding
[2024-11-09 01:19:15,451 INFO  L311             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-11-09 01:19:15,454 INFO  L316             CfgBuilder]: Removed 0 assume(true) statements.
[2024-11-09 01:19:15,455 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:19:15 BoogieIcfgContainer
[2024-11-09 01:19:15,455 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-11-09 01:19:15,458 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-11-09 01:19:15,458 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2024-11-09 01:19:15,463 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2024-11-09 01:19:15,463 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:19:14" (1/3) ...
[2024-11-09 01:19:15,464 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd4ad4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:19:15, skipping insertion in model container
[2024-11-09 01:19:15,466 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:19:14" (2/3) ...
[2024-11-09 01:19:15,466 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd4ad4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:19:15, skipping insertion in model container
[2024-11-09 01:19:15,466 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:19:15" (3/3) ...
[2024-11-09 01:19:15,468 INFO  L112   eAbstractionObserver]: Analyzing ICFG zonotope_3.c.v+lhb-reducer.c
[2024-11-09 01:19:15,487 INFO  L214   ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-11-09 01:19:15,488 INFO  L154   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2024-11-09 01:19:15,559 INFO  L332      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2024-11-09 01:19:15,570 INFO  L333      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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@17b6fe9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-11-09 01:19:15,570 INFO  L334      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-11-09 01:19:15,577 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 52 states, 50 states have (on average 1.88) internal successors, (94), 51 states have internal predecessors, (94), 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)
[2024-11-09 01:19:15,584 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2024-11-09 01:19:15,584 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-09 01:19:15,585 INFO  L215           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]
[2024-11-09 01:19:15,585 INFO  L396      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-09 01:19:15,590 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-09 01:19:15,590 INFO  L85        PathProgramCache]: Analyzing trace with hash 1668661496, now seen corresponding path program 1 times
[2024-11-09 01:19:15,598 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-09 01:19:15,599 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182459476]
[2024-11-09 01:19:15,599 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-09 01:19:15,599 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-09 01:19:15,764 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-09 01:19:16,097 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-09 01:19:16,099 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-09 01:19:16,100 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182459476]
[2024-11-09 01:19:16,100 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182459476] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-09 01:19:16,101 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-09 01:19:16,101 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2024-11-09 01:19:16,102 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090655538]
[2024-11-09 01:19:16,104 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-09 01:19:16,110 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2024-11-09 01:19:16,110 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-09 01:19:16,139 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2024-11-09 01:19:16,141 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2024-11-09 01:19:16,144 INFO  L87              Difference]: Start difference. First operand  has 52 states, 50 states have (on average 1.88) internal successors, (94), 51 states have internal predecessors, (94), 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 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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)
[2024-11-09 01:19:16,230 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-09 01:19:16,230 INFO  L93              Difference]: Finished difference Result 58 states and 100 transitions.
[2024-11-09 01:19:16,232 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2024-11-09 01:19:16,234 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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 44
[2024-11-09 01:19:16,235 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-09 01:19:16,244 INFO  L225             Difference]: With dead ends: 58
[2024-11-09 01:19:16,244 INFO  L226             Difference]: Without dead ends: 50
[2024-11-09 01:19:16,247 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2024-11-09 01:19:16,251 INFO  L432           NwaCegarLoop]: 87 mSDtfsCounter, 0 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-11-09 01:19:16,252 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 342 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-11-09 01:19:16,270 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 50 states.
[2024-11-09 01:19:16,282 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50.
[2024-11-09 01:19:16,284 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 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)
[2024-11-09 01:19:16,285 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions.
[2024-11-09 01:19:16,287 INFO  L78                 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 44
[2024-11-09 01:19:16,287 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-09 01:19:16,287 INFO  L471      AbstractCegarLoop]: Abstraction has 50 states and 53 transitions.
[2024-11-09 01:19:16,288 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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)
[2024-11-09 01:19:16,288 INFO  L276                IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions.
[2024-11-09 01:19:16,289 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2024-11-09 01:19:16,289 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-09 01:19:16,289 INFO  L215           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]
[2024-11-09 01:19:16,290 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2024-11-09 01:19:16,290 INFO  L396      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-09 01:19:16,291 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-09 01:19:16,291 INFO  L85        PathProgramCache]: Analyzing trace with hash 1685672157, now seen corresponding path program 1 times
[2024-11-09 01:19:16,291 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-09 01:19:16,292 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565493862]
[2024-11-09 01:19:16,292 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-09 01:19:16,292 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-09 01:19:16,355 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-09 01:19:16,800 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-09 01:19:16,801 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-09 01:19:16,801 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565493862]
[2024-11-09 01:19:16,801 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565493862] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-09 01:19:16,801 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-09 01:19:16,802 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2024-11-09 01:19:16,802 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300459349]
[2024-11-09 01:19:16,802 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-09 01:19:16,803 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2024-11-09 01:19:16,803 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-09 01:19:16,804 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2024-11-09 01:19:16,806 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132
[2024-11-09 01:19:16,807 INFO  L87              Difference]: Start difference. First operand 50 states and 53 transitions. Second operand  has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 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)
[2024-11-09 01:19:16,906 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-09 01:19:16,911 INFO  L93              Difference]: Finished difference Result 63 states and 69 transitions.
[2024-11-09 01:19:16,913 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2024-11-09 01:19:16,914 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 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 44
[2024-11-09 01:19:16,914 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-09 01:19:16,915 INFO  L225             Difference]: With dead ends: 63
[2024-11-09 01:19:16,916 INFO  L226             Difference]: Without dead ends: 56
[2024-11-09 01:19:16,917 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132
[2024-11-09 01:19:16,918 INFO  L432           NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-11-09 01:19:16,920 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 109 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-11-09 01:19:16,921 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 56 states.
[2024-11-09 01:19:16,926 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52.
[2024-11-09 01:19:16,928 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 52 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 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)
[2024-11-09 01:19:16,929 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions.
[2024-11-09 01:19:16,932 INFO  L78                 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 44
[2024-11-09 01:19:16,933 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-09 01:19:16,933 INFO  L471      AbstractCegarLoop]: Abstraction has 52 states and 55 transitions.
[2024-11-09 01:19:16,933 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 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)
[2024-11-09 01:19:16,933 INFO  L276                IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions.
[2024-11-09 01:19:16,934 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2024-11-09 01:19:16,934 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-09 01:19:16,934 INFO  L215           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]
[2024-11-09 01:19:16,935 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2024-11-09 01:19:16,935 INFO  L396      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-09 01:19:16,935 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-09 01:19:16,936 INFO  L85        PathProgramCache]: Analyzing trace with hash 894822493, now seen corresponding path program 1 times
[2024-11-09 01:19:16,939 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-09 01:19:16,940 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195134819]
[2024-11-09 01:19:16,940 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-09 01:19:16,940 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-09 01:19:16,990 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-09 01:19:17,036 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-09 01:19:17,038 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-09 01:19:17,038 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195134819]
[2024-11-09 01:19:17,038 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195134819] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-09 01:19:17,039 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-09 01:19:17,039 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2024-11-09 01:19:17,039 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308142974]
[2024-11-09 01:19:17,039 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-09 01:19:17,041 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2024-11-09 01:19:17,041 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-09 01:19:17,042 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2024-11-09 01:19:17,042 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-11-09 01:19:17,043 INFO  L87              Difference]: Start difference. First operand 52 states and 55 transitions. Second operand  has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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)
[2024-11-09 01:19:17,058 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-09 01:19:17,059 INFO  L93              Difference]: Finished difference Result 66 states and 72 transitions.
[2024-11-09 01:19:17,059 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2024-11-09 01:19:17,060 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 49
[2024-11-09 01:19:17,062 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-09 01:19:17,062 INFO  L225             Difference]: With dead ends: 66
[2024-11-09 01:19:17,062 INFO  L226             Difference]: Without dead ends: 51
[2024-11-09 01:19:17,063 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-11-09 01:19:17,065 INFO  L432           NwaCegarLoop]: 52 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2024-11-09 01:19:17,067 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-11-09 01:19:17,068 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 51 states.
[2024-11-09 01:19:17,072 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51.
[2024-11-09 01:19:17,072 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 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)
[2024-11-09 01:19:17,075 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions.
[2024-11-09 01:19:17,076 INFO  L78                 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 49
[2024-11-09 01:19:17,077 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-09 01:19:17,077 INFO  L471      AbstractCegarLoop]: Abstraction has 51 states and 52 transitions.
[2024-11-09 01:19:17,077 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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)
[2024-11-09 01:19:17,079 INFO  L276                IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions.
[2024-11-09 01:19:17,080 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2024-11-09 01:19:17,080 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-09 01:19:17,080 INFO  L215           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]
[2024-11-09 01:19:17,080 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2024-11-09 01:19:17,083 INFO  L396      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-09 01:19:17,084 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-09 01:19:17,084 INFO  L85        PathProgramCache]: Analyzing trace with hash 442233218, now seen corresponding path program 1 times
[2024-11-09 01:19:17,084 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-09 01:19:17,084 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558122271]
[2024-11-09 01:19:17,084 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-09 01:19:17,084 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-09 01:19:17,137 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-09 01:19:17,470 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-09 01:19:17,470 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-09 01:19:17,470 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558122271]
[2024-11-09 01:19:17,470 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558122271] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-09 01:19:17,471 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989900926]
[2024-11-09 01:19:17,471 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-09 01:19:17,471 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-09 01:19:17,471 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3
[2024-11-09 01:19:17,473 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-11-09 01:19:17,476 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2024-11-09 01:19:17,729 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-09 01:19:17,733 INFO  L255         TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 12 conjuncts are in the unsatisfiable core
[2024-11-09 01:19:17,745 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-09 01:19:17,922 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-09 01:19:17,922 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-09 01:19:18,354 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-09 01:19:18,354 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989900926] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-09 01:19:18,354 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [763051288]
[2024-11-09 01:19:18,376 INFO  L159        IcfgInterpreter]: Started Sifa with 48 locations of interest
[2024-11-09 01:19:18,376 INFO  L166        IcfgInterpreter]: Building call graph
[2024-11-09 01:19:18,382 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2024-11-09 01:19:18,389 INFO  L176        IcfgInterpreter]: Starting interpretation
[2024-11-09 01:19:18,390 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2024-11-09 01:19:20,261 INFO  L180        IcfgInterpreter]: Interpretation finished
[2024-11-09 01:19:24,844 INFO  L133             SifaRunner]: Sifa could not show that error location is unreachable, found '730#(and (= ~__tmp_120439_1~0 1) (<= 1 |#StackHeapBarrier|) (= ~__return_120502~0 0) (= ~__return_main~0 0))' at error location
[2024-11-09 01:19:24,844 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED
[2024-11-09 01:19:24,844 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2024-11-09 01:19:24,845 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24
[2024-11-09 01:19:24,845 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797799843]
[2024-11-09 01:19:24,845 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2024-11-09 01:19:24,845 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 25 states
[2024-11-09 01:19:24,846 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-09 01:19:24,847 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants.
[2024-11-09 01:19:24,848 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=693, Invalid=1659, Unknown=0, NotChecked=0, Total=2352
[2024-11-09 01:19:24,848 INFO  L87              Difference]: Start difference. First operand 51 states and 52 transitions. Second operand  has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 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)
[2024-11-09 01:19:24,986 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-09 01:19:24,986 INFO  L93              Difference]: Finished difference Result 118 states and 131 transitions.
[2024-11-09 01:19:24,986 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2024-11-09 01:19:24,987 INFO  L78                 Accepts]: Start accepts. Automaton has  has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 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 49
[2024-11-09 01:19:24,987 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-09 01:19:24,988 INFO  L225             Difference]: With dead ends: 118
[2024-11-09 01:19:24,988 INFO  L226             Difference]: Without dead ends: 111
[2024-11-09 01:19:24,989 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=693, Invalid=1659, Unknown=0, NotChecked=0, Total=2352
[2024-11-09 01:19:24,990 INFO  L432           NwaCegarLoop]: 29 mSDtfsCounter, 105 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-11-09 01:19:24,991 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 147 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-11-09 01:19:24,992 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 111 states.
[2024-11-09 01:19:24,997 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111.
[2024-11-09 01:19:24,997 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 111 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 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)
[2024-11-09 01:19:24,998 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions.
[2024-11-09 01:19:24,998 INFO  L78                 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 49
[2024-11-09 01:19:24,999 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-09 01:19:24,999 INFO  L471      AbstractCegarLoop]: Abstraction has 111 states and 112 transitions.
[2024-11-09 01:19:24,999 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 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)
[2024-11-09 01:19:24,999 INFO  L276                IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions.
[2024-11-09 01:19:25,001 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 110
[2024-11-09 01:19:25,001 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-09 01:19:25,001 INFO  L215           NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-09 01:19:25,023 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2024-11-09 01:19:25,202 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-09 01:19:25,202 INFO  L396      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-09 01:19:25,202 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-09 01:19:25,203 INFO  L85        PathProgramCache]: Analyzing trace with hash -1363671358, now seen corresponding path program 2 times
[2024-11-09 01:19:25,203 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-09 01:19:25,203 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616355962]
[2024-11-09 01:19:25,203 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-09 01:19:25,203 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-09 01:19:25,267 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-09 01:19:26,043 INFO  L134       CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-09 01:19:26,043 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-09 01:19:26,043 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616355962]
[2024-11-09 01:19:26,043 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616355962] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-09 01:19:26,044 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938609745]
[2024-11-09 01:19:26,044 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2024-11-09 01:19:26,044 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-09 01:19:26,044 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3
[2024-11-09 01:19:26,046 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-11-09 01:19:26,050 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2024-11-09 01:19:26,415 INFO  L227   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s)
[2024-11-09 01:19:26,415 INFO  L228   tOrderPrioritization]: Conjunction of SSA is unsat
[2024-11-09 01:19:26,419 INFO  L255         TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 24 conjuncts are in the unsatisfiable core
[2024-11-09 01:19:26,424 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-09 01:19:26,597 INFO  L134       CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-09 01:19:26,597 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-09 01:19:27,534 INFO  L134       CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-09 01:19:27,534 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938609745] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-09 01:19:27,534 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1426913966]
[2024-11-09 01:19:27,537 INFO  L159        IcfgInterpreter]: Started Sifa with 48 locations of interest
[2024-11-09 01:19:27,537 INFO  L166        IcfgInterpreter]: Building call graph
[2024-11-09 01:19:27,538 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2024-11-09 01:19:27,538 INFO  L176        IcfgInterpreter]: Starting interpretation
[2024-11-09 01:19:27,538 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2024-11-09 01:19:28,724 INFO  L180        IcfgInterpreter]: Interpretation finished
[2024-11-09 01:19:33,215 INFO  L133             SifaRunner]: Sifa could not show that error location is unreachable, found '1680#(and (= ~__tmp_120439_1~0 1) (<= 1 |#StackHeapBarrier|) (= ~__return_120502~0 0) (= ~__return_main~0 0))' at error location
[2024-11-09 01:19:33,215 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED
[2024-11-09 01:19:33,215 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2024-11-09 01:19:33,215 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48
[2024-11-09 01:19:33,215 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351527267]
[2024-11-09 01:19:33,215 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2024-11-09 01:19:33,216 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 49 states
[2024-11-09 01:19:33,216 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-09 01:19:33,218 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants.
[2024-11-09 01:19:33,220 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256
[2024-11-09 01:19:33,220 INFO  L87              Difference]: Start difference. First operand 111 states and 112 transitions. Second operand  has 49 states, 49 states have (on average 4.448979591836735) internal successors, (218), 48 states have internal predecessors, (218), 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)
[2024-11-09 01:19:33,505 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-09 01:19:33,509 INFO  L93              Difference]: Finished difference Result 238 states and 263 transitions.
[2024-11-09 01:19:33,509 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. 
[2024-11-09 01:19:33,510 INFO  L78                 Accepts]: Start accepts. Automaton has  has 49 states, 49 states have (on average 4.448979591836735) internal successors, (218), 48 states have internal predecessors, (218), 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 109
[2024-11-09 01:19:33,510 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-09 01:19:33,514 INFO  L225             Difference]: With dead ends: 238
[2024-11-09 01:19:33,514 INFO  L226             Difference]: Without dead ends: 231
[2024-11-09 01:19:33,516 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2320 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256
[2024-11-09 01:19:33,517 INFO  L432           NwaCegarLoop]: 29 mSDtfsCounter, 83 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2024-11-09 01:19:33,519 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 218 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2024-11-09 01:19:33,520 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 231 states.
[2024-11-09 01:19:33,531 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231.
[2024-11-09 01:19:33,532 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 231 states, 230 states have (on average 1.008695652173913) internal successors, (232), 230 states have internal predecessors, (232), 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)
[2024-11-09 01:19:33,533 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions.
[2024-11-09 01:19:33,534 INFO  L78                 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 109
[2024-11-09 01:19:33,534 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-09 01:19:33,534 INFO  L471      AbstractCegarLoop]: Abstraction has 231 states and 232 transitions.
[2024-11-09 01:19:33,535 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 49 states, 49 states have (on average 4.448979591836735) internal successors, (218), 48 states have internal predecessors, (218), 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)
[2024-11-09 01:19:33,535 INFO  L276                IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions.
[2024-11-09 01:19:33,539 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 230
[2024-11-09 01:19:33,540 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-09 01:19:33,540 INFO  L215           NwaCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-09 01:19:33,566 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2024-11-09 01:19:33,744 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-09 01:19:33,744 INFO  L396      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-09 01:19:33,745 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-09 01:19:33,745 INFO  L85        PathProgramCache]: Analyzing trace with hash 964170050, now seen corresponding path program 3 times
[2024-11-09 01:19:33,745 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-09 01:19:33,745 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293779555]
[2024-11-09 01:19:33,745 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-09 01:19:33,745 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-09 01:19:33,889 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-09 01:19:36,644 INFO  L134       CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-09 01:19:36,645 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-09 01:19:36,645 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293779555]
[2024-11-09 01:19:36,645 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293779555] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-09 01:19:36,645 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700130594]
[2024-11-09 01:19:36,647 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2024-11-09 01:19:36,648 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-09 01:19:36,648 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3
[2024-11-09 01:19:36,650 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-11-09 01:19:36,653 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2024-11-09 01:19:37,225 INFO  L227   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2024-11-09 01:19:37,225 INFO  L228   tOrderPrioritization]: Conjunction of SSA is unsat
[2024-11-09 01:19:37,231 INFO  L255         TraceCheckSpWp]: Trace formula consists of 1900 conjuncts, 48 conjuncts are in the unsatisfiable core
[2024-11-09 01:19:37,240 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-09 01:19:37,563 INFO  L134       CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-09 01:19:37,563 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-09 01:19:41,190 INFO  L134       CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-09 01:19:41,191 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [700130594] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-09 01:19:41,191 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [632297650]
[2024-11-09 01:19:41,196 INFO  L159        IcfgInterpreter]: Started Sifa with 48 locations of interest
[2024-11-09 01:19:41,196 INFO  L166        IcfgInterpreter]: Building call graph
[2024-11-09 01:19:41,198 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2024-11-09 01:19:41,198 INFO  L176        IcfgInterpreter]: Starting interpretation
[2024-11-09 01:19:41,198 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2024-11-09 01:19:42,195 INFO  L180        IcfgInterpreter]: Interpretation finished
[2024-11-09 01:19:46,434 INFO  L133             SifaRunner]: Sifa could not show that error location is unreachable, found '3638#(and (= ~__tmp_120439_1~0 1) (<= 1 |#StackHeapBarrier|) (= ~__return_120502~0 0) (= ~__return_main~0 0))' at error location
[2024-11-09 01:19:46,434 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED
[2024-11-09 01:19:46,434 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2024-11-09 01:19:46,435 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96
[2024-11-09 01:19:46,435 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193905897]
[2024-11-09 01:19:46,435 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2024-11-09 01:19:46,436 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 97 states
[2024-11-09 01:19:46,436 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-09 01:19:46,439 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants.
[2024-11-09 01:19:46,442 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6345, Invalid=8175, Unknown=0, NotChecked=0, Total=14520
[2024-11-09 01:19:46,443 INFO  L87              Difference]: Start difference. First operand 231 states and 232 transitions. Second operand  has 97 states, 97 states have (on average 4.721649484536083) internal successors, (458), 96 states have internal predecessors, (458), 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)
[2024-11-09 01:19:47,128 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-09 01:19:47,129 INFO  L93              Difference]: Finished difference Result 478 states and 527 transitions.
[2024-11-09 01:19:47,129 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. 
[2024-11-09 01:19:47,129 INFO  L78                 Accepts]: Start accepts. Automaton has  has 97 states, 97 states have (on average 4.721649484536083) internal successors, (458), 96 states have internal predecessors, (458), 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 229
[2024-11-09 01:19:47,130 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-09 01:19:47,131 INFO  L225             Difference]: With dead ends: 478
[2024-11-09 01:19:47,132 INFO  L226             Difference]: Without dead ends: 471
[2024-11-09 01:19:47,134 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 614 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4576 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=6345, Invalid=8175, Unknown=0, NotChecked=0, Total=14520
[2024-11-09 01:19:47,135 INFO  L432           NwaCegarLoop]: 29 mSDtfsCounter, 65 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2024-11-09 01:19:47,136 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 366 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2024-11-09 01:19:47,137 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 471 states.
[2024-11-09 01:19:47,158 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 471.
[2024-11-09 01:19:47,159 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 471 states, 470 states have (on average 1.004255319148936) internal successors, (472), 470 states have internal predecessors, (472), 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)
[2024-11-09 01:19:47,160 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 472 transitions.
[2024-11-09 01:19:47,161 INFO  L78                 Accepts]: Start accepts. Automaton has 471 states and 472 transitions. Word has length 229
[2024-11-09 01:19:47,161 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-09 01:19:47,161 INFO  L471      AbstractCegarLoop]: Abstraction has 471 states and 472 transitions.
[2024-11-09 01:19:47,162 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 97 states, 97 states have (on average 4.721649484536083) internal successors, (458), 96 states have internal predecessors, (458), 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)
[2024-11-09 01:19:47,162 INFO  L276                IsEmpty]: Start isEmpty. Operand 471 states and 472 transitions.
[2024-11-09 01:19:47,170 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 470
[2024-11-09 01:19:47,170 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-09 01:19:47,171 INFO  L215           NwaCegarLoop]: trace histogram [86, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-09 01:19:47,193 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2024-11-09 01:19:47,371 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2024-11-09 01:19:47,372 INFO  L396      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-09 01:19:47,372 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-09 01:19:47,372 INFO  L85        PathProgramCache]: Analyzing trace with hash 1138206274, now seen corresponding path program 4 times
[2024-11-09 01:19:47,372 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-09 01:19:47,372 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225781609]
[2024-11-09 01:19:47,373 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-09 01:19:47,373 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-09 01:19:47,646 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-09 01:19:57,008 INFO  L134       CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-09 01:19:57,009 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-09 01:19:57,009 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225781609]
[2024-11-09 01:19:57,009 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225781609] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-09 01:19:57,009 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724061484]
[2024-11-09 01:19:57,009 INFO  L93    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2024-11-09 01:19:57,009 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-09 01:19:57,009 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3
[2024-11-09 01:19:57,010 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-11-09 01:19:57,012 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2024-11-09 01:19:58,096 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-09 01:19:58,112 INFO  L255         TraceCheckSpWp]: Trace formula consists of 3820 conjuncts, 96 conjuncts are in the unsatisfiable core
[2024-11-09 01:19:58,121 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-09 01:19:58,746 INFO  L134       CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-09 01:19:58,746 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-09 01:20:10,563 INFO  L134       CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-09 01:20:10,564 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724061484] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-09 01:20:10,564 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [528874830]
[2024-11-09 01:20:10,567 INFO  L159        IcfgInterpreter]: Started Sifa with 48 locations of interest
[2024-11-09 01:20:10,567 INFO  L166        IcfgInterpreter]: Building call graph
[2024-11-09 01:20:10,567 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2024-11-09 01:20:10,568 INFO  L176        IcfgInterpreter]: Starting interpretation
[2024-11-09 01:20:10,568 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2024-11-09 01:20:11,478 INFO  L180        IcfgInterpreter]: Interpretation finished
[2024-11-09 01:20:16,092 INFO  L133             SifaRunner]: Sifa could not show that error location is unreachable, found '7612#(and (= ~__tmp_120439_1~0 1) (<= 1 |#StackHeapBarrier|) (= ~__return_120502~0 0) (= ~__return_main~0 0))' at error location
[2024-11-09 01:20:16,092 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED
[2024-11-09 01:20:16,093 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2024-11-09 01:20:16,093 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192
[2024-11-09 01:20:16,093 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834010164]
[2024-11-09 01:20:16,093 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2024-11-09 01:20:16,095 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 193 states
[2024-11-09 01:20:16,095 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-09 01:20:16,102 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants.
[2024-11-09 01:20:16,107 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=21945, Invalid=24927, Unknown=0, NotChecked=0, Total=46872
[2024-11-09 01:20:16,108 INFO  L87              Difference]: Start difference. First operand 471 states and 472 transitions. Second operand  has 193 states, 193 states have (on average 4.860103626943006) internal successors, (938), 192 states have internal predecessors, (938), 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)
[2024-11-09 01:20:18,704 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-09 01:20:18,704 INFO  L93              Difference]: Finished difference Result 958 states and 1055 transitions.
[2024-11-09 01:20:18,705 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. 
[2024-11-09 01:20:18,706 INFO  L78                 Accepts]: Start accepts. Automaton has  has 193 states, 193 states have (on average 4.860103626943006) internal successors, (938), 192 states have internal predecessors, (938), 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 469
[2024-11-09 01:20:18,707 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-09 01:20:18,713 INFO  L225             Difference]: With dead ends: 958
[2024-11-09 01:20:18,713 INFO  L226             Difference]: Without dead ends: 951
[2024-11-09 01:20:18,718 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 1501 GetRequests, 1286 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9088 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=21945, Invalid=24927, Unknown=0, NotChecked=0, Total=46872
[2024-11-09 01:20:18,719 INFO  L432           NwaCegarLoop]: 29 mSDtfsCounter, 113 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2024-11-09 01:20:18,719 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 629 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2024-11-09 01:20:18,721 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 951 states.
[2024-11-09 01:20:18,741 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 951.
[2024-11-09 01:20:18,743 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 951 states, 950 states have (on average 1.0021052631578948) internal successors, (952), 950 states have internal predecessors, (952), 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)
[2024-11-09 01:20:18,745 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 952 transitions.
[2024-11-09 01:20:18,745 INFO  L78                 Accepts]: Start accepts. Automaton has 951 states and 952 transitions. Word has length 469
[2024-11-09 01:20:18,746 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-09 01:20:18,747 INFO  L471      AbstractCegarLoop]: Abstraction has 951 states and 952 transitions.
[2024-11-09 01:20:18,747 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 193 states, 193 states have (on average 4.860103626943006) internal successors, (938), 192 states have internal predecessors, (938), 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)
[2024-11-09 01:20:18,748 INFO  L276                IsEmpty]: Start isEmpty. Operand 951 states and 952 transitions.
[2024-11-09 01:20:18,779 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 950
[2024-11-09 01:20:18,779 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-09 01:20:18,780 INFO  L215           NwaCegarLoop]: trace histogram [182, 181, 181, 181, 181, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-09 01:20:18,805 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2024-11-09 01:20:18,980 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6
[2024-11-09 01:20:18,981 INFO  L396      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-09 01:20:18,981 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-09 01:20:18,981 INFO  L85        PathProgramCache]: Analyzing trace with hash -770387902, now seen corresponding path program 5 times
[2024-11-09 01:20:18,981 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-09 01:20:18,981 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390943701]
[2024-11-09 01:20:18,981 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-09 01:20:18,981 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-09 01:20:19,539 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-09 01:20:54,901 INFO  L134       CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-09 01:20:54,902 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-09 01:20:54,902 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390943701]
[2024-11-09 01:20:54,902 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390943701] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-09 01:20:54,902 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65050329]
[2024-11-09 01:20:54,902 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2024-11-09 01:20:54,903 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-09 01:20:54,903 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3
[2024-11-09 01:20:54,905 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-11-09 01:20:54,907 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2024-11-09 01:20:58,608 INFO  L227   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 182 check-sat command(s)
[2024-11-09 01:20:58,608 INFO  L228   tOrderPrioritization]: Conjunction of SSA is unsat
[2024-11-09 01:20:58,642 INFO  L255         TraceCheckSpWp]: Trace formula consists of 7660 conjuncts, 192 conjuncts are in the unsatisfiable core
[2024-11-09 01:20:58,663 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-09 01:20:59,782 INFO  L134       CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-09 01:20:59,782 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-09 01:21:47,886 INFO  L134       CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-09 01:21:47,886 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [65050329] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-09 01:21:47,887 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1568326694]
[2024-11-09 01:21:47,889 INFO  L159        IcfgInterpreter]: Started Sifa with 48 locations of interest
[2024-11-09 01:21:47,889 INFO  L166        IcfgInterpreter]: Building call graph
[2024-11-09 01:21:47,890 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2024-11-09 01:21:47,890 INFO  L176        IcfgInterpreter]: Starting interpretation
[2024-11-09 01:21:47,890 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2024-11-09 01:21:48,901 INFO  L180        IcfgInterpreter]: Interpretation finished
[2024-11-09 01:21:53,500 INFO  L133             SifaRunner]: Sifa could not show that error location is unreachable, found '15618#(and (= ~__tmp_120439_1~0 1) (<= 1 |#StackHeapBarrier|) (= ~__return_120502~0 0) (= ~__return_main~0 0))' at error location
[2024-11-09 01:21:53,500 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED
[2024-11-09 01:21:53,501 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2024-11-09 01:21:53,502 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384
[2024-11-09 01:21:53,502 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389677912]
[2024-11-09 01:21:53,502 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2024-11-09 01:21:53,505 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 385 states
[2024-11-09 01:21:53,505 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-09 01:21:53,528 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants.
[2024-11-09 01:21:53,540 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=80793, Invalid=86079, Unknown=0, NotChecked=0, Total=166872
[2024-11-09 01:21:53,542 INFO  L87              Difference]: Start difference. First operand 951 states and 952 transitions. Second operand  has 385 states, 385 states have (on average 4.92987012987013) internal successors, (1898), 384 states have internal predecessors, (1898), 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)
[2024-11-09 01:22:07,003 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-09 01:22:07,003 INFO  L93              Difference]: Finished difference Result 1918 states and 2111 transitions.
[2024-11-09 01:22:07,003 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. 
[2024-11-09 01:22:07,004 INFO  L78                 Accepts]: Start accepts. Automaton has  has 385 states, 385 states have (on average 4.92987012987013) internal successors, (1898), 384 states have internal predecessors, (1898), 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 949
[2024-11-09 01:22:07,006 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-09 01:22:07,011 INFO  L225             Difference]: With dead ends: 1918
[2024-11-09 01:22:07,011 INFO  L226             Difference]: Without dead ends: 1911
[2024-11-09 01:22:07,020 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 3037 GetRequests, 2630 SyntacticMatches, 0 SemanticMatches, 407 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18112 ImplicationChecksByTransitivity, 66.4s TimeCoverageRelationStatistics Valid=80793, Invalid=86079, Unknown=0, NotChecked=0, Total=166872
[2024-11-09 01:22:07,021 INFO  L432           NwaCegarLoop]: 29 mSDtfsCounter, 83 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2024-11-09 01:22:07,022 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1264 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2024-11-09 01:22:07,024 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1911 states.
[2024-11-09 01:22:07,047 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1911.
[2024-11-09 01:22:07,050 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1911 states, 1910 states have (on average 1.0010471204188482) internal successors, (1912), 1910 states have internal predecessors, (1912), 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)
[2024-11-09 01:22:07,055 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 1912 transitions.
[2024-11-09 01:22:07,055 INFO  L78                 Accepts]: Start accepts. Automaton has 1911 states and 1912 transitions. Word has length 949
[2024-11-09 01:22:07,057 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-09 01:22:07,057 INFO  L471      AbstractCegarLoop]: Abstraction has 1911 states and 1912 transitions.
[2024-11-09 01:22:07,059 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 385 states, 385 states have (on average 4.92987012987013) internal successors, (1898), 384 states have internal predecessors, (1898), 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)
[2024-11-09 01:22:07,059 INFO  L276                IsEmpty]: Start isEmpty. Operand 1911 states and 1912 transitions.
[2024-11-09 01:22:07,201 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1910
[2024-11-09 01:22:07,202 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-09 01:22:07,202 INFO  L215           NwaCegarLoop]: trace histogram [374, 373, 373, 373, 373, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-09 01:22:07,239 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2024-11-09 01:22:07,403 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-09 01:22:07,403 INFO  L396      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-09 01:22:07,404 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-09 01:22:07,404 INFO  L85        PathProgramCache]: Analyzing trace with hash 75965506, now seen corresponding path program 6 times
[2024-11-09 01:22:07,404 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-09 01:22:07,405 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305705099]
[2024-11-09 01:22:07,405 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-09 01:22:07,405 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-09 01:22:09,010 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-09 01:25:03,455 INFO  L134       CoverageAnalysis]: Checked inductivity of 347636 backedges. 0 proven. 347636 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-09 01:25:03,456 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2024-11-09 01:25:03,456 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305705099]
[2024-11-09 01:25:03,456 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305705099] provided 0 perfect and 1 imperfect interpolant sequences
[2024-11-09 01:25:03,456 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426545161]
[2024-11-09 01:25:03,456 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2024-11-09 01:25:03,456 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-09 01:25:03,456 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3
[2024-11-09 01:25:03,457 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-11-09 01:25:03,459 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2024-11-09 01:25:07,792 INFO  L227   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2024-11-09 01:25:07,792 INFO  L228   tOrderPrioritization]: Conjunction of SSA is unsat
[2024-11-09 01:25:07,879 INFO  L255         TraceCheckSpWp]: Trace formula consists of 15340 conjuncts, 384 conjuncts are in the unsatisfiable core
[2024-11-09 01:25:07,925 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-09 01:25:10,295 INFO  L134       CoverageAnalysis]: Checked inductivity of 347636 backedges. 0 proven. 347636 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-09 01:25:10,296 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-11-09 01:28:27,862 INFO  L134       CoverageAnalysis]: Checked inductivity of 347636 backedges. 0 proven. 347636 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-11-09 01:28:27,862 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426545161] provided 0 perfect and 2 imperfect interpolant sequences
[2024-11-09 01:28:27,862 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1566377707]
[2024-11-09 01:28:27,865 INFO  L159        IcfgInterpreter]: Started Sifa with 48 locations of interest
[2024-11-09 01:28:27,866 INFO  L166        IcfgInterpreter]: Building call graph
[2024-11-09 01:28:27,866 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2024-11-09 01:28:27,866 INFO  L176        IcfgInterpreter]: Starting interpretation
[2024-11-09 01:28:27,867 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2024-11-09 01:28:28,982 INFO  L180        IcfgInterpreter]: Interpretation finished
[2024-11-09 01:28:36,140 INFO  L133             SifaRunner]: Sifa could not show that error location is unreachable, found '31688#(and (= ~__tmp_120439_1~0 1) (<= 1 |#StackHeapBarrier|) (= ~__return_120502~0 0) (= ~__return_main~0 0))' at error location
[2024-11-09 01:28:36,140 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED
[2024-11-09 01:28:36,140 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2024-11-09 01:28:36,141 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 768
[2024-11-09 01:28:36,141 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835861817]
[2024-11-09 01:28:36,141 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2024-11-09 01:28:36,146 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 769 states
[2024-11-09 01:28:36,146 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2024-11-09 01:28:36,234 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants.
[2024-11-09 01:28:36,275 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=309078, Invalid=318978, Unknown=0, NotChecked=0, Total=628056
[2024-11-09 01:28:36,279 INFO  L87              Difference]: Start difference. First operand 1911 states and 1912 transitions. Second operand  has 769 states, 769 states have (on average 4.964889466840052) internal successors, (3818), 768 states have internal predecessors, (3818), 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)
[2024-11-09 01:30:14,129 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-09 01:30:14,129 INFO  L93              Difference]: Finished difference Result 3838 states and 4223 transitions.
[2024-11-09 01:30:14,129 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. 
[2024-11-09 01:30:14,132 INFO  L78                 Accepts]: Start accepts. Automaton has  has 769 states, 769 states have (on average 4.964889466840052) internal successors, (3818), 768 states have internal predecessors, (3818), 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 1909
[2024-11-09 01:30:14,136 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-09 01:30:14,146 INFO  L225             Difference]: With dead ends: 3838
[2024-11-09 01:30:14,147 INFO  L226             Difference]: Without dead ends: 3831
[2024-11-09 01:30:14,192 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 6109 GetRequests, 5318 SyntacticMatches, 0 SemanticMatches, 791 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36160 ImplicationChecksByTransitivity, 263.2s TimeCoverageRelationStatistics Valid=309078, Invalid=318978, Unknown=0, NotChecked=0, Total=628056
[2024-11-09 01:30:14,193 INFO  L432           NwaCegarLoop]: 29 mSDtfsCounter, 89 mSDsluCounter, 2348 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 2377 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time
[2024-11-09 01:30:14,193 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 2377 Invalid, 1599 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [22 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time]
[2024-11-09 01:30:14,197 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3831 states.
[2024-11-09 01:30:14,247 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3831 to 3831.
[2024-11-09 01:30:14,251 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3831 states, 3830 states have (on average 1.0005221932114883) internal successors, (3832), 3830 states have internal predecessors, (3832), 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)
[2024-11-09 01:30:14,258 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 3832 transitions.
[2024-11-09 01:30:14,258 INFO  L78                 Accepts]: Start accepts. Automaton has 3831 states and 3832 transitions. Word has length 1909
[2024-11-09 01:30:14,261 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-09 01:30:14,261 INFO  L471      AbstractCegarLoop]: Abstraction has 3831 states and 3832 transitions.
[2024-11-09 01:30:14,264 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 769 states, 769 states have (on average 4.964889466840052) internal successors, (3818), 768 states have internal predecessors, (3818), 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)
[2024-11-09 01:30:14,264 INFO  L276                IsEmpty]: Start isEmpty. Operand 3831 states and 3832 transitions.
[2024-11-09 01:30:14,366 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 3830
[2024-11-09 01:30:14,367 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-09 01:30:14,368 INFO  L215           NwaCegarLoop]: trace histogram [758, 757, 757, 757, 757, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-11-09 01:30:14,427 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2024-11-09 01:30:14,568 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d0f758-a101-4dee-bc06-dc67248b0b86/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-09 01:30:14,569 INFO  L396      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-09 01:30:14,569 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-09 01:30:14,570 INFO  L85        PathProgramCache]: Analyzing trace with hash 1095486530, now seen corresponding path program 7 times
[2024-11-09 01:30:14,570 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2024-11-09 01:30:14,570 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445508217]
[2024-11-09 01:30:14,571 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-09 01:30:14,571 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-11-09 01:30:19,301 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat