./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 5e519f3a
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53995a2-e39f-4662-b80d-dc972e5f0d4f/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53995a2-e39f-4662-b80d-dc972e5f0d4f/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53995a2-e39f-4662-b80d-dc972e5f0d4f/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53995a2-e39f-4662-b80d-dc972e5f0d4f/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53995a2-e39f-4662-b80d-dc972e5f0d4f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53995a2-e39f-4662-b80d-dc972e5f0d4f/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7311ea8eed1b76a77d129e75acc31171f325dda60148033cbbd15d9405b6e79a
--- Real Ultimate output ---
[0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset.
This is Ultimate 0.2.2-dev-5e519f3
[2022-11-03 03:28:33,239 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-11-03 03:28:33,241 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-11-03 03:28:33,276 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-11-03 03:28:33,276 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-11-03 03:28:33,278 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-11-03 03:28:33,279 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-11-03 03:28:33,281 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-11-03 03:28:33,283 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-11-03 03:28:33,284 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-11-03 03:28:33,286 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-11-03 03:28:33,287 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-11-03 03:28:33,287 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-11-03 03:28:33,289 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-11-03 03:28:33,290 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-11-03 03:28:33,292 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-11-03 03:28:33,293 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-11-03 03:28:33,294 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-11-03 03:28:33,296 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-11-03 03:28:33,308 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-11-03 03:28:33,309 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-11-03 03:28:33,311 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-11-03 03:28:33,312 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-11-03 03:28:33,314 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-11-03 03:28:33,318 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-11-03 03:28:33,325 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-11-03 03:28:33,325 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-11-03 03:28:33,327 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-11-03 03:28:33,327 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-11-03 03:28:33,328 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-11-03 03:28:33,329 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-11-03 03:28:33,330 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-11-03 03:28:33,331 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-11-03 03:28:33,332 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-11-03 03:28:33,334 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-11-03 03:28:33,334 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-11-03 03:28:33,335 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-11-03 03:28:33,336 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-11-03 03:28:33,336 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-11-03 03:28:33,337 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-11-03 03:28:33,338 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-11-03 03:28:33,348 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53995a2-e39f-4662-b80d-dc972e5f0d4f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf
[2022-11-03 03:28:33,404 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-11-03 03:28:33,405 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-11-03 03:28:33,405 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-11-03 03:28:33,405 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-11-03 03:28:33,406 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-11-03 03:28:33,413 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-11-03 03:28:33,414 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2022-11-03 03:28:33,414 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2022-11-03 03:28:33,414 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2022-11-03 03:28:33,415 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2022-11-03 03:28:33,416 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2022-11-03 03:28:33,417 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2022-11-03 03:28:33,417 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2022-11-03 03:28:33,417 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2022-11-03 03:28:33,417 INFO  L138        SettingsManager]:  * Interval Domain=false
[2022-11-03 03:28:33,418 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2022-11-03 03:28:33,418 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2022-11-03 03:28:33,418 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2022-11-03 03:28:33,419 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-11-03 03:28:33,420 INFO  L138        SettingsManager]:  * sizeof long=4
[2022-11-03 03:28:33,420 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-11-03 03:28:33,420 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2022-11-03 03:28:33,420 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-11-03 03:28:33,423 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-11-03 03:28:33,424 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-11-03 03:28:33,424 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-11-03 03:28:33,424 INFO  L138        SettingsManager]:  * sizeof long double=12
[2022-11-03 03:28:33,424 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-11-03 03:28:33,425 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-11-03 03:28:33,425 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-11-03 03:28:33,425 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-11-03 03:28:33,426 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-11-03 03:28:33,426 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-03 03:28:33,426 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-11-03 03:28:33,427 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2022-11-03 03:28:33,427 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-11-03 03:28:33,427 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-11-03 03:28:33,427 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2022-11-03 03:28:33,428 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-11-03 03:28:33,428 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-11-03 03:28:33,428 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2022-11-03 03:28:33,429 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53995a2-e39f-4662-b80d-dc972e5f0d4f/bin/utaipan-7li7fVZpFI/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_a53995a2-e39f-4662-b80d-dc972e5f0d4f/bin/utaipan-7li7fVZpFI
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> 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 -> 7311ea8eed1b76a77d129e75acc31171f325dda60148033cbbd15d9405b6e79a
[2022-11-03 03:28:33,760 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-11-03 03:28:33,787 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-11-03 03:28:33,791 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-11-03 03:28:33,792 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-11-03 03:28:33,793 INFO  L275        PluginConnector]: CDTParser initialized
[2022-11-03 03:28:33,795 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53995a2-e39f-4662-b80d-dc972e5f0d4f/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c
[2022-11-03 03:28:33,896 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53995a2-e39f-4662-b80d-dc972e5f0d4f/bin/utaipan-7li7fVZpFI/data/81feabe08/ba910f1137294a10917a7ba5f6ba5ef8/FLAG852b88046
[2022-11-03 03:28:34,604 INFO  L306              CDTParser]: Found 1 translation units.
[2022-11-03 03:28:34,605 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53995a2-e39f-4662-b80d-dc972e5f0d4f/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c
[2022-11-03 03:28:34,631 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53995a2-e39f-4662-b80d-dc972e5f0d4f/bin/utaipan-7li7fVZpFI/data/81feabe08/ba910f1137294a10917a7ba5f6ba5ef8/FLAG852b88046
[2022-11-03 03:28:34,802 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53995a2-e39f-4662-b80d-dc972e5f0d4f/bin/utaipan-7li7fVZpFI/data/81feabe08/ba910f1137294a10917a7ba5f6ba5ef8
[2022-11-03 03:28:34,805 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-11-03 03:28:34,809 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-11-03 03:28:34,812 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-11-03 03:28:34,813 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-11-03 03:28:34,817 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-11-03 03:28:34,818 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:28:34" (1/1) ...
[2022-11-03 03:28:34,820 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7400b6a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:34, skipping insertion in model container
[2022-11-03 03:28:34,821 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:28:34" (1/1) ...
[2022-11-03 03:28:34,831 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-11-03 03:28:34,928 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-11-03 03:28:35,494 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53995a2-e39f-4662-b80d-dc972e5f0d4f/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c[65471,65484]
[2022-11-03 03:28:35,505 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-11-03 03:28:35,525 INFO  L203         MainTranslator]: Completed pre-run
[2022-11-03 03:28:35,706 WARN  L230   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53995a2-e39f-4662-b80d-dc972e5f0d4f/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c[65471,65484]
[2022-11-03 03:28:35,706 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-11-03 03:28:35,726 INFO  L208         MainTranslator]: Completed translation
[2022-11-03 03:28:35,726 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:35 WrapperNode
[2022-11-03 03:28:35,726 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-11-03 03:28:35,728 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-11-03 03:28:35,728 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-11-03 03:28:35,728 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-11-03 03:28:35,749 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:35" (1/1) ...
[2022-11-03 03:28:35,775 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:35" (1/1) ...
[2022-11-03 03:28:35,898 INFO  L138                Inliner]: procedures = 24, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 2131
[2022-11-03 03:28:35,899 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-11-03 03:28:35,900 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-11-03 03:28:35,900 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-11-03 03:28:35,900 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-11-03 03:28:35,934 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:35" (1/1) ...
[2022-11-03 03:28:35,935 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:35" (1/1) ...
[2022-11-03 03:28:35,945 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:35" (1/1) ...
[2022-11-03 03:28:35,946 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:35" (1/1) ...
[2022-11-03 03:28:35,978 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:35" (1/1) ...
[2022-11-03 03:28:36,004 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:35" (1/1) ...
[2022-11-03 03:28:36,012 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:35" (1/1) ...
[2022-11-03 03:28:36,020 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:35" (1/1) ...
[2022-11-03 03:28:36,036 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-11-03 03:28:36,037 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-11-03 03:28:36,037 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-11-03 03:28:36,037 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-11-03 03:28:36,039 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:35" (1/1) ...
[2022-11-03 03:28:36,072 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-03 03:28:36,088 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53995a2-e39f-4662-b80d-dc972e5f0d4f/bin/utaipan-7li7fVZpFI/z3
[2022-11-03 03:28:36,117 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53995a2-e39f-4662-b80d-dc972e5f0d4f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-11-03 03:28:36,151 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53995a2-e39f-4662-b80d-dc972e5f0d4f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-11-03 03:28:36,176 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-11-03 03:28:36,177 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-11-03 03:28:36,177 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-11-03 03:28:36,177 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-11-03 03:28:36,417 INFO  L235             CfgBuilder]: Building ICFG
[2022-11-03 03:28:36,420 INFO  L261             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-11-03 03:28:38,964 INFO  L276             CfgBuilder]: Performing block encoding
[2022-11-03 03:28:42,160 INFO  L295             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-11-03 03:28:42,161 INFO  L300             CfgBuilder]: Removed 1 assume(true) statements.
[2022-11-03 03:28:42,165 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:28:42 BoogieIcfgContainer
[2022-11-03 03:28:42,166 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-11-03 03:28:42,169 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-11-03 03:28:42,169 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-11-03 03:28:42,173 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-11-03 03:28:42,173 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:28:34" (1/3) ...
[2022-11-03 03:28:42,174 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b76243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:28:42, skipping insertion in model container
[2022-11-03 03:28:42,175 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:35" (2/3) ...
[2022-11-03 03:28:42,175 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b76243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:28:42, skipping insertion in model container
[2022-11-03 03:28:42,175 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:28:42" (3/3) ...
[2022-11-03 03:28:42,177 INFO  L112   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c
[2022-11-03 03:28:42,205 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-11-03 03:28:42,205 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-11-03 03:28:42,315 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-11-03 03:28:42,332 INFO  L357      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@b05942a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2022-11-03 03:28:42,336 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-11-03 03:28:42,349 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 441 states, 439 states have (on average 1.7175398633257404) internal successors, (754), 440 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:28:42,383 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 127
[2022-11-03 03:28:42,383 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-03 03:28:42,384 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-03 03:28:42,385 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-03 03:28:42,391 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-03 03:28:42,392 INFO  L85        PathProgramCache]: Analyzing trace with hash -302462875, now seen corresponding path program 1 times
[2022-11-03 03:28:42,404 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-03 03:28:42,405 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831373879]
[2022-11-03 03:28:42,405 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-03 03:28:42,406 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-03 03:28:43,238 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-03 03:28:54,470 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-03 03:28:54,470 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-03 03:28:54,471 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831373879]
[2022-11-03 03:28:54,472 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831373879] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-03 03:28:54,472 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-03 03:28:54,472 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-11-03 03:28:54,474 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036468197]
[2022-11-03 03:28:54,475 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-03 03:28:54,496 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-03 03:28:54,496 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-03 03:28:54,563 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-03 03:28:54,563 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-03 03:28:54,567 INFO  L87              Difference]: Start difference. First operand  has 441 states, 439 states have (on average 1.7175398633257404) internal successors, (754), 440 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:28:55,152 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-03 03:28:55,152 INFO  L93              Difference]: Finished difference Result 483 states and 822 transitions.
[2022-11-03 03:28:55,153 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-11-03 03:28:55,155 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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 126
[2022-11-03 03:28:55,156 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-03 03:28:55,182 INFO  L225             Difference]: With dead ends: 483
[2022-11-03 03:28:55,184 INFO  L226             Difference]: Without dead ends: 460
[2022-11-03 03:28:55,188 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-03 03:28:55,195 INFO  L413           NwaCegarLoop]: 673 mSDtfsCounter, 31 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-11-03 03:28:55,199 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1356 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-11-03 03:28:55,224 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 460 states.
[2022-11-03 03:28:55,319 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 450.
[2022-11-03 03:28:55,326 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 450 states, 449 states have (on average 1.712694877505568) internal successors, (769), 449 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:28:55,330 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 769 transitions.
[2022-11-03 03:28:55,335 INFO  L78                 Accepts]: Start accepts. Automaton has 450 states and 769 transitions. Word has length 126
[2022-11-03 03:28:55,337 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-03 03:28:55,337 INFO  L495      AbstractCegarLoop]: Abstraction has 450 states and 769 transitions.
[2022-11-03 03:28:55,339 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:28:55,339 INFO  L276                IsEmpty]: Start isEmpty. Operand 450 states and 769 transitions.
[2022-11-03 03:28:55,345 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 128
[2022-11-03 03:28:55,347 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-03 03:28:55,348 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-03 03:28:55,348 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-11-03 03:28:55,349 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-03 03:28:55,350 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-03 03:28:55,350 INFO  L85        PathProgramCache]: Analyzing trace with hash -860128157, now seen corresponding path program 1 times
[2022-11-03 03:28:55,350 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-03 03:28:55,351 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447110905]
[2022-11-03 03:28:55,351 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-03 03:28:55,352 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-03 03:28:55,660 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-03 03:29:02,571 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-03 03:29:02,572 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-03 03:29:02,573 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447110905]
[2022-11-03 03:29:02,573 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447110905] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-03 03:29:02,575 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-03 03:29:02,575 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-11-03 03:29:02,575 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698730348]
[2022-11-03 03:29:02,576 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-03 03:29:02,579 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-03 03:29:02,579 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-03 03:29:02,580 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-03 03:29:02,580 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-03 03:29:02,580 INFO  L87              Difference]: Start difference. First operand 450 states and 769 transitions. Second operand  has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:03,074 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-03 03:29:03,074 INFO  L93              Difference]: Finished difference Result 483 states and 819 transitions.
[2022-11-03 03:29:03,075 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-11-03 03:29:03,075 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 127
[2022-11-03 03:29:03,076 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-03 03:29:03,079 INFO  L225             Difference]: With dead ends: 483
[2022-11-03 03:29:03,080 INFO  L226             Difference]: Without dead ends: 462
[2022-11-03 03:29:03,080 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-03 03:29:03,082 INFO  L413           NwaCegarLoop]: 680 mSDtfsCounter, 26 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-11-03 03:29:03,083 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 2034 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-11-03 03:29:03,085 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 462 states.
[2022-11-03 03:29:03,100 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450.
[2022-11-03 03:29:03,102 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 450 states, 449 states have (on average 1.710467706013363) internal successors, (768), 449 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:03,104 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 768 transitions.
[2022-11-03 03:29:03,105 INFO  L78                 Accepts]: Start accepts. Automaton has 450 states and 768 transitions. Word has length 127
[2022-11-03 03:29:03,105 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-03 03:29:03,106 INFO  L495      AbstractCegarLoop]: Abstraction has 450 states and 768 transitions.
[2022-11-03 03:29:03,106 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:03,106 INFO  L276                IsEmpty]: Start isEmpty. Operand 450 states and 768 transitions.
[2022-11-03 03:29:03,108 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 129
[2022-11-03 03:29:03,109 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-03 03:29:03,109 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-03 03:29:03,109 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-11-03 03:29:03,110 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-03 03:29:03,110 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-03 03:29:03,111 INFO  L85        PathProgramCache]: Analyzing trace with hash -962430962, now seen corresponding path program 1 times
[2022-11-03 03:29:03,111 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-03 03:29:03,111 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119661576]
[2022-11-03 03:29:03,112 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-03 03:29:03,112 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-03 03:29:03,300 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-03 03:29:09,528 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-03 03:29:09,529 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-03 03:29:09,529 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119661576]
[2022-11-03 03:29:09,529 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119661576] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-03 03:29:09,532 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-03 03:29:09,532 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-11-03 03:29:09,533 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75321014]
[2022-11-03 03:29:09,533 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-03 03:29:09,535 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-03 03:29:09,535 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-03 03:29:09,536 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-03 03:29:09,536 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-03 03:29:09,537 INFO  L87              Difference]: Start difference. First operand 450 states and 768 transitions. Second operand  has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:09,880 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-03 03:29:09,880 INFO  L93              Difference]: Finished difference Result 483 states and 818 transitions.
[2022-11-03 03:29:09,881 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-11-03 03:29:09,882 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 128
[2022-11-03 03:29:09,883 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-03 03:29:09,885 INFO  L225             Difference]: With dead ends: 483
[2022-11-03 03:29:09,885 INFO  L226             Difference]: Without dead ends: 462
[2022-11-03 03:29:09,886 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-03 03:29:09,887 INFO  L413           NwaCegarLoop]: 680 mSDtfsCounter, 24 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-11-03 03:29:09,888 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1374 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-11-03 03:29:09,890 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 462 states.
[2022-11-03 03:29:09,910 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450.
[2022-11-03 03:29:09,913 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 450 states, 449 states have (on average 1.7082405345211582) internal successors, (767), 449 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:09,916 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 767 transitions.
[2022-11-03 03:29:09,916 INFO  L78                 Accepts]: Start accepts. Automaton has 450 states and 767 transitions. Word has length 128
[2022-11-03 03:29:09,918 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-03 03:29:09,918 INFO  L495      AbstractCegarLoop]: Abstraction has 450 states and 767 transitions.
[2022-11-03 03:29:09,918 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:09,919 INFO  L276                IsEmpty]: Start isEmpty. Operand 450 states and 767 transitions.
[2022-11-03 03:29:09,923 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 130
[2022-11-03 03:29:09,924 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-03 03:29:09,924 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-03 03:29:09,924 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-11-03 03:29:09,926 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-03 03:29:09,929 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-03 03:29:09,930 INFO  L85        PathProgramCache]: Analyzing trace with hash 166601132, now seen corresponding path program 1 times
[2022-11-03 03:29:09,930 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-03 03:29:09,930 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194705714]
[2022-11-03 03:29:09,931 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-03 03:29:09,931 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-03 03:29:10,169 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-03 03:29:15,417 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-03 03:29:15,418 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-03 03:29:15,418 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194705714]
[2022-11-03 03:29:15,418 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194705714] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-03 03:29:15,419 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-03 03:29:15,419 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-11-03 03:29:15,419 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104391800]
[2022-11-03 03:29:15,420 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-03 03:29:15,420 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-03 03:29:15,421 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-03 03:29:15,421 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-03 03:29:15,421 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-03 03:29:15,422 INFO  L87              Difference]: Start difference. First operand 450 states and 767 transitions. Second operand  has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:15,856 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-03 03:29:15,856 INFO  L93              Difference]: Finished difference Result 483 states and 817 transitions.
[2022-11-03 03:29:15,857 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-11-03 03:29:15,857 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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 129
[2022-11-03 03:29:15,858 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-03 03:29:15,860 INFO  L225             Difference]: With dead ends: 483
[2022-11-03 03:29:15,860 INFO  L226             Difference]: Without dead ends: 462
[2022-11-03 03:29:15,861 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-03 03:29:15,863 INFO  L413           NwaCegarLoop]: 680 mSDtfsCounter, 22 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-11-03 03:29:15,863 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 2034 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-11-03 03:29:15,865 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 462 states.
[2022-11-03 03:29:15,876 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450.
[2022-11-03 03:29:15,878 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 450 states, 449 states have (on average 1.7060133630289531) internal successors, (766), 449 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:15,880 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 766 transitions.
[2022-11-03 03:29:15,880 INFO  L78                 Accepts]: Start accepts. Automaton has 450 states and 766 transitions. Word has length 129
[2022-11-03 03:29:15,881 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-03 03:29:15,881 INFO  L495      AbstractCegarLoop]: Abstraction has 450 states and 766 transitions.
[2022-11-03 03:29:15,881 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:15,882 INFO  L276                IsEmpty]: Start isEmpty. Operand 450 states and 766 transitions.
[2022-11-03 03:29:15,883 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 131
[2022-11-03 03:29:15,884 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-03 03:29:15,884 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-03 03:29:15,884 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2022-11-03 03:29:15,885 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-03 03:29:15,885 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-03 03:29:15,886 INFO  L85        PathProgramCache]: Analyzing trace with hash 812309431, now seen corresponding path program 1 times
[2022-11-03 03:29:15,886 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-03 03:29:15,886 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907490134]
[2022-11-03 03:29:15,886 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-03 03:29:15,887 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-03 03:29:16,060 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-03 03:29:20,447 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-03 03:29:20,448 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-03 03:29:20,448 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907490134]
[2022-11-03 03:29:20,448 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907490134] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-03 03:29:20,448 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-03 03:29:20,448 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-11-03 03:29:20,449 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433763107]
[2022-11-03 03:29:20,449 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-03 03:29:20,449 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-03 03:29:20,450 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-03 03:29:20,450 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-03 03:29:20,450 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-03 03:29:20,451 INFO  L87              Difference]: Start difference. First operand 450 states and 766 transitions. Second operand  has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:20,778 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-03 03:29:20,778 INFO  L93              Difference]: Finished difference Result 483 states and 816 transitions.
[2022-11-03 03:29:20,779 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-11-03 03:29:20,779 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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 130
[2022-11-03 03:29:20,779 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-03 03:29:20,782 INFO  L225             Difference]: With dead ends: 483
[2022-11-03 03:29:20,782 INFO  L226             Difference]: Without dead ends: 462
[2022-11-03 03:29:20,783 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-03 03:29:20,784 INFO  L413           NwaCegarLoop]: 680 mSDtfsCounter, 20 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-11-03 03:29:20,785 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1372 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-11-03 03:29:20,787 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 462 states.
[2022-11-03 03:29:20,798 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450.
[2022-11-03 03:29:20,800 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 450 states, 449 states have (on average 1.7037861915367483) internal successors, (765), 449 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:20,801 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 765 transitions.
[2022-11-03 03:29:20,802 INFO  L78                 Accepts]: Start accepts. Automaton has 450 states and 765 transitions. Word has length 130
[2022-11-03 03:29:20,802 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-03 03:29:20,803 INFO  L495      AbstractCegarLoop]: Abstraction has 450 states and 765 transitions.
[2022-11-03 03:29:20,803 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:20,803 INFO  L276                IsEmpty]: Start isEmpty. Operand 450 states and 765 transitions.
[2022-11-03 03:29:20,805 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 132
[2022-11-03 03:29:20,806 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-03 03:29:20,806 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-03 03:29:20,806 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2022-11-03 03:29:20,807 INFO  L420      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-03 03:29:20,807 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-03 03:29:20,807 INFO  L85        PathProgramCache]: Analyzing trace with hash -640118027, now seen corresponding path program 1 times
[2022-11-03 03:29:20,808 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-03 03:29:20,808 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193293648]
[2022-11-03 03:29:20,808 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-03 03:29:20,809 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-03 03:29:20,969 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-03 03:29:24,965 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-03 03:29:24,966 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-03 03:29:24,966 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193293648]
[2022-11-03 03:29:24,966 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193293648] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-03 03:29:24,966 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-03 03:29:24,967 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-11-03 03:29:24,967 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871625464]
[2022-11-03 03:29:24,967 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-03 03:29:24,968 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-03 03:29:24,968 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-03 03:29:24,969 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-03 03:29:24,969 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-03 03:29:24,969 INFO  L87              Difference]: Start difference. First operand 450 states and 765 transitions. Second operand  has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:25,396 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-03 03:29:25,396 INFO  L93              Difference]: Finished difference Result 483 states and 815 transitions.
[2022-11-03 03:29:25,399 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-11-03 03:29:25,399 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 131
[2022-11-03 03:29:25,399 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-03 03:29:25,402 INFO  L225             Difference]: With dead ends: 483
[2022-11-03 03:29:25,402 INFO  L226             Difference]: Without dead ends: 462
[2022-11-03 03:29:25,403 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-03 03:29:25,404 INFO  L413           NwaCegarLoop]: 680 mSDtfsCounter, 18 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-11-03 03:29:25,404 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2034 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-11-03 03:29:25,405 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 462 states.
[2022-11-03 03:29:25,424 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450.
[2022-11-03 03:29:25,426 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 450 states, 449 states have (on average 1.7015590200445434) internal successors, (764), 449 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:25,428 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 764 transitions.
[2022-11-03 03:29:25,428 INFO  L78                 Accepts]: Start accepts. Automaton has 450 states and 764 transitions. Word has length 131
[2022-11-03 03:29:25,429 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-03 03:29:25,429 INFO  L495      AbstractCegarLoop]: Abstraction has 450 states and 764 transitions.
[2022-11-03 03:29:25,429 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:25,430 INFO  L276                IsEmpty]: Start isEmpty. Operand 450 states and 764 transitions.
[2022-11-03 03:29:25,432 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 134
[2022-11-03 03:29:25,432 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-03 03:29:25,432 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-03 03:29:25,432 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2022-11-03 03:29:25,434 INFO  L420      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-03 03:29:25,434 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-03 03:29:25,434 INFO  L85        PathProgramCache]: Analyzing trace with hash 1842699357, now seen corresponding path program 1 times
[2022-11-03 03:29:25,435 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-03 03:29:25,435 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838214386]
[2022-11-03 03:29:25,435 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-03 03:29:25,436 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-03 03:29:25,708 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-03 03:29:30,707 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-03 03:29:30,707 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-03 03:29:30,707 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838214386]
[2022-11-03 03:29:30,708 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838214386] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-03 03:29:30,708 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-03 03:29:30,708 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-11-03 03:29:30,708 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065582746]
[2022-11-03 03:29:30,709 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-03 03:29:30,709 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-03 03:29:30,709 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-03 03:29:30,710 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-03 03:29:30,710 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-03 03:29:30,711 INFO  L87              Difference]: Start difference. First operand 450 states and 764 transitions. Second operand  has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:31,069 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-03 03:29:31,070 INFO  L93              Difference]: Finished difference Result 481 states and 811 transitions.
[2022-11-03 03:29:31,070 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-11-03 03:29:31,070 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 133
[2022-11-03 03:29:31,071 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-03 03:29:31,073 INFO  L225             Difference]: With dead ends: 481
[2022-11-03 03:29:31,073 INFO  L226             Difference]: Without dead ends: 460
[2022-11-03 03:29:31,074 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-03 03:29:31,075 INFO  L413           NwaCegarLoop]: 679 mSDtfsCounter, 15 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-11-03 03:29:31,076 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1362 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-11-03 03:29:31,077 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 460 states.
[2022-11-03 03:29:31,088 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 451.
[2022-11-03 03:29:31,090 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 451 states, 450 states have (on average 1.7) internal successors, (765), 450 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:31,092 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 765 transitions.
[2022-11-03 03:29:31,092 INFO  L78                 Accepts]: Start accepts. Automaton has 451 states and 765 transitions. Word has length 133
[2022-11-03 03:29:31,093 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-03 03:29:31,093 INFO  L495      AbstractCegarLoop]: Abstraction has 451 states and 765 transitions.
[2022-11-03 03:29:31,093 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:31,094 INFO  L276                IsEmpty]: Start isEmpty. Operand 451 states and 765 transitions.
[2022-11-03 03:29:31,096 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 135
[2022-11-03 03:29:31,096 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-03 03:29:31,096 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-03 03:29:31,097 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2022-11-03 03:29:31,097 INFO  L420      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-03 03:29:31,097 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-03 03:29:31,098 INFO  L85        PathProgramCache]: Analyzing trace with hash 1201002542, now seen corresponding path program 1 times
[2022-11-03 03:29:31,098 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-03 03:29:31,098 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252181395]
[2022-11-03 03:29:31,099 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-03 03:29:31,099 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-03 03:29:31,187 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-03 03:29:35,235 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-03 03:29:35,236 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-03 03:29:35,236 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252181395]
[2022-11-03 03:29:35,236 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252181395] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-03 03:29:35,236 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-03 03:29:35,236 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-11-03 03:29:35,237 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208582]
[2022-11-03 03:29:35,237 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-03 03:29:35,237 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-03 03:29:35,238 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-03 03:29:35,238 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-03 03:29:35,238 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-03 03:29:35,239 INFO  L87              Difference]: Start difference. First operand 451 states and 765 transitions. Second operand  has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:35,667 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-03 03:29:35,667 INFO  L93              Difference]: Finished difference Result 482 states and 812 transitions.
[2022-11-03 03:29:35,668 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-11-03 03:29:35,668 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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 134
[2022-11-03 03:29:35,668 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-03 03:29:35,671 INFO  L225             Difference]: With dead ends: 482
[2022-11-03 03:29:35,671 INFO  L226             Difference]: Without dead ends: 461
[2022-11-03 03:29:35,671 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-03 03:29:35,672 INFO  L413           NwaCegarLoop]: 684 mSDtfsCounter, 12 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-11-03 03:29:35,673 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1378 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-11-03 03:29:35,674 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 461 states.
[2022-11-03 03:29:35,685 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 453.
[2022-11-03 03:29:35,687 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 453 states, 452 states have (on average 1.6946902654867257) internal successors, (766), 452 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:35,689 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 766 transitions.
[2022-11-03 03:29:35,689 INFO  L78                 Accepts]: Start accepts. Automaton has 453 states and 766 transitions. Word has length 134
[2022-11-03 03:29:35,690 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-03 03:29:35,690 INFO  L495      AbstractCegarLoop]: Abstraction has 453 states and 766 transitions.
[2022-11-03 03:29:35,690 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:35,691 INFO  L276                IsEmpty]: Start isEmpty. Operand 453 states and 766 transitions.
[2022-11-03 03:29:35,693 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 137
[2022-11-03 03:29:35,693 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-03 03:29:35,693 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-03 03:29:35,693 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2022-11-03 03:29:35,694 INFO  L420      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-03 03:29:35,694 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-03 03:29:35,694 INFO  L85        PathProgramCache]: Analyzing trace with hash 325408148, now seen corresponding path program 1 times
[2022-11-03 03:29:35,695 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-03 03:29:35,695 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954967102]
[2022-11-03 03:29:35,695 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-03 03:29:35,695 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-03 03:29:36,993 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-03 03:29:41,429 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-03 03:29:41,430 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-03 03:29:41,430 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954967102]
[2022-11-03 03:29:41,430 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954967102] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-03 03:29:41,430 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-03 03:29:41,430 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2022-11-03 03:29:41,430 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575956509]
[2022-11-03 03:29:41,430 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-03 03:29:41,431 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-03 03:29:41,431 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-03 03:29:41,432 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-03 03:29:41,432 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-03 03:29:41,432 INFO  L87              Difference]: Start difference. First operand 453 states and 766 transitions. Second operand  has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:41,921 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-03 03:29:41,921 INFO  L93              Difference]: Finished difference Result 482 states and 809 transitions.
[2022-11-03 03:29:41,921 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-11-03 03:29:41,922 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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 136
[2022-11-03 03:29:41,922 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-03 03:29:41,925 INFO  L225             Difference]: With dead ends: 482
[2022-11-03 03:29:41,925 INFO  L226             Difference]: Without dead ends: 461
[2022-11-03 03:29:41,925 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2022-11-03 03:29:41,926 INFO  L413           NwaCegarLoop]: 681 mSDtfsCounter, 7 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 2031 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-11-03 03:29:41,927 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 2031 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-11-03 03:29:41,928 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 461 states.
[2022-11-03 03:29:41,940 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 454.
[2022-11-03 03:29:41,942 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 454 states, 453 states have (on average 1.6931567328918322) internal successors, (767), 453 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:41,944 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 767 transitions.
[2022-11-03 03:29:41,944 INFO  L78                 Accepts]: Start accepts. Automaton has 454 states and 767 transitions. Word has length 136
[2022-11-03 03:29:41,945 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-03 03:29:41,945 INFO  L495      AbstractCegarLoop]: Abstraction has 454 states and 767 transitions.
[2022-11-03 03:29:41,945 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:41,945 INFO  L276                IsEmpty]: Start isEmpty. Operand 454 states and 767 transitions.
[2022-11-03 03:29:41,947 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 138
[2022-11-03 03:29:41,948 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-03 03:29:41,948 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-03 03:29:41,948 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2022-11-03 03:29:41,949 INFO  L420      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-03 03:29:41,949 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-03 03:29:41,949 INFO  L85        PathProgramCache]: Analyzing trace with hash 1499107483, now seen corresponding path program 1 times
[2022-11-03 03:29:41,949 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-03 03:29:41,950 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010068956]
[2022-11-03 03:29:41,950 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-03 03:29:41,950 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-03 03:29:42,099 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-03 03:29:42,609 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-03 03:29:42,609 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-03 03:29:42,609 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010068956]
[2022-11-03 03:29:42,610 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010068956] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-03 03:29:42,610 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-03 03:29:42,610 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-03 03:29:42,610 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144478718]
[2022-11-03 03:29:42,610 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-03 03:29:42,611 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-03 03:29:42,611 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2022-11-03 03:29:42,612 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-03 03:29:42,612 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-11-03 03:29:42,612 INFO  L87              Difference]: Start difference. First operand 454 states and 767 transitions. Second operand  has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:43,171 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-03 03:29:43,172 INFO  L93              Difference]: Finished difference Result 505 states and 847 transitions.
[2022-11-03 03:29:43,174 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2022-11-03 03:29:43,174 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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 137
[2022-11-03 03:29:43,174 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-03 03:29:43,177 INFO  L225             Difference]: With dead ends: 505
[2022-11-03 03:29:43,177 INFO  L226             Difference]: Without dead ends: 484
[2022-11-03 03:29:43,178 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56
[2022-11-03 03:29:43,179 INFO  L413           NwaCegarLoop]: 696 mSDtfsCounter, 45 mSDsluCounter, 2243 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 2754 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-11-03 03:29:43,181 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 2754 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-11-03 03:29:43,183 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 484 states.
[2022-11-03 03:29:43,196 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 457.
[2022-11-03 03:29:43,197 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 457 states, 456 states have (on average 1.6864035087719298) internal successors, (769), 456 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:43,199 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 769 transitions.
[2022-11-03 03:29:43,200 INFO  L78                 Accepts]: Start accepts. Automaton has 457 states and 769 transitions. Word has length 137
[2022-11-03 03:29:43,200 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-11-03 03:29:43,200 INFO  L495      AbstractCegarLoop]: Abstraction has 457 states and 769 transitions.
[2022-11-03 03:29:43,201 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-03 03:29:43,201 INFO  L276                IsEmpty]: Start isEmpty. Operand 457 states and 769 transitions.
[2022-11-03 03:29:43,203 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 143
[2022-11-03 03:29:43,203 INFO  L187           NwaCegarLoop]: Found error trace
[2022-11-03 03:29:43,204 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-03 03:29:43,208 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2022-11-03 03:29:43,209 INFO  L420      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-03 03:29:43,209 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-11-03 03:29:43,210 INFO  L85        PathProgramCache]: Analyzing trace with hash 924697408, now seen corresponding path program 1 times
[2022-11-03 03:29:43,210 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2022-11-03 03:29:43,213 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118343248]
[2022-11-03 03:29:43,213 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-03 03:29:43,213 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-03 03:29:43,879 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-03 03:29:57,301 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-03 03:29:57,301 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2022-11-03 03:29:57,301 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118343248]
[2022-11-03 03:29:57,302 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118343248] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-03 03:29:57,302 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81250311]
[2022-11-03 03:29:57,302 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-03 03:29:57,302 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-03 03:29:57,303 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53995a2-e39f-4662-b80d-dc972e5f0d4f/bin/utaipan-7li7fVZpFI/z3
[2022-11-03 03:29:57,305 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53995a2-e39f-4662-b80d-dc972e5f0d4f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-03 03:29:57,330 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53995a2-e39f-4662-b80d-dc972e5f0d4f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-11-03 03:29:58,112 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-03 03:29:58,126 INFO  L263         TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 23 conjunts are in the unsatisfiable core
[2022-11-03 03:29:58,190 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-11-03 03:30:31,920 WARN  L234               SmtUtils]: Spent 10.10s on a formula simplification. DAG size of input: 567 DAG size of output: 501 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)
[2022-11-03 03:33:00,126 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-03 03:33:00,129 INFO  L328         TraceCheckSpWp]: Computing backward predicates...