./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound2.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version dbf71c69
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7950877d732f4800002d6a797590b13f630fa3c613f928d7858c74ba3c97d345
--- 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-dbf71c6-m
[2022-10-17 10:18:04,235 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2022-10-17 10:18:04,238 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2022-10-17 10:18:04,273 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-10-17 10:18:04,274 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-10-17 10:18:04,276 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-10-17 10:18:04,277 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-10-17 10:18:04,280 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2022-10-17 10:18:04,282 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-10-17 10:18:04,284 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-10-17 10:18:04,285 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2022-10-17 10:18:04,286 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-10-17 10:18:04,287 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-10-17 10:18:04,288 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-10-17 10:18:04,290 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-10-17 10:18:04,292 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-10-17 10:18:04,293 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-10-17 10:18:04,294 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-10-17 10:18:04,297 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-10-17 10:18:04,300 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2022-10-17 10:18:04,302 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-10-17 10:18:04,304 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-10-17 10:18:04,306 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2022-10-17 10:18:04,307 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-10-17 10:18:04,313 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-10-17 10:18:04,319 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-10-17 10:18:04,319 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-10-17 10:18:04,321 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-10-17 10:18:04,322 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-10-17 10:18:04,324 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-10-17 10:18:04,324 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-10-17 10:18:04,326 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-10-17 10:18:04,328 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-10-17 10:18:04,329 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2022-10-17 10:18:04,331 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-10-17 10:18:04,331 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2022-10-17 10:18:04,332 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-10-17 10:18:04,332 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-10-17 10:18:04,333 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2022-10-17 10:18:04,334 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2022-10-17 10:18:04,335 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2022-10-17 10:18:04,336 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf
[2022-10-17 10:18:04,386 INFO  L113        SettingsManager]: Loading preferences was successful
[2022-10-17 10:18:04,387 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2022-10-17 10:18:04,388 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-10-17 10:18:04,388 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-10-17 10:18:04,390 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-10-17 10:18:04,390 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-10-17 10:18:04,391 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-10-17 10:18:04,391 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2022-10-17 10:18:04,391 INFO  L138        SettingsManager]:  * Use SBE=true
[2022-10-17 10:18:04,392 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-10-17 10:18:04,393 INFO  L138        SettingsManager]:  * sizeof long=4
[2022-10-17 10:18:04,393 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2022-10-17 10:18:04,394 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2022-10-17 10:18:04,394 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2022-10-17 10:18:04,394 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2022-10-17 10:18:04,394 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-10-17 10:18:04,395 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2022-10-17 10:18:04,395 INFO  L138        SettingsManager]:  * sizeof long double=12
[2022-10-17 10:18:04,395 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2022-10-17 10:18:04,395 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2022-10-17 10:18:04,396 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2022-10-17 10:18:04,396 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-10-17 10:18:04,396 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2022-10-17 10:18:04,405 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2022-10-17 10:18:04,406 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-10-17 10:18:04,406 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-10-17 10:18:04,406 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2022-10-17 10:18:04,407 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-10-17 10:18:04,407 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2022-10-17 10:18:04,407 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-10-17 10:18:04,407 INFO  L138        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2022-10-17 10:18:04,407 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2022-10-17 10:18:04,408 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-10-17 10:18:04,408 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_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/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_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7950877d732f4800002d6a797590b13f630fa3c613f928d7858c74ba3c97d345
[2022-10-17 10:18:04,677 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2022-10-17 10:18:04,712 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-10-17 10:18:04,716 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-10-17 10:18:04,717 INFO  L271        PluginConnector]: Initializing CDTParser...
[2022-10-17 10:18:04,718 INFO  L275        PluginConnector]: CDTParser initialized
[2022-10-17 10:18:04,719 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound2.c
[2022-10-17 10:18:04,789 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/data/f099fd9ce/2d78f87fa73e41ab83220a4ecda3bbef/FLAG34e11fcf1
[2022-10-17 10:18:05,366 INFO  L306              CDTParser]: Found 1 translation units.
[2022-10-17 10:18:05,367 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound2.c
[2022-10-17 10:18:05,374 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/data/f099fd9ce/2d78f87fa73e41ab83220a4ecda3bbef/FLAG34e11fcf1
[2022-10-17 10:18:05,748 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/data/f099fd9ce/2d78f87fa73e41ab83220a4ecda3bbef
[2022-10-17 10:18:05,750 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-10-17 10:18:05,761 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2022-10-17 10:18:05,763 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-10-17 10:18:05,763 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-10-17 10:18:05,766 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2022-10-17 10:18:05,766 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:18:05" (1/1) ...
[2022-10-17 10:18:05,768 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69f27ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:05, skipping insertion in model container
[2022-10-17 10:18:05,768 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:18:05" (1/1) ...
[2022-10-17 10:18:05,775 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2022-10-17 10:18:05,790 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2022-10-17 10:18:05,938 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_05a16b52-8126-4c10-9128-fcf8a74f7d00/sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound2.c[552,565]
[2022-10-17 10:18:05,981 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-10-17 10:18:05,991 INFO  L203         MainTranslator]: Completed pre-run
[2022-10-17 10:18:06,005 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_05a16b52-8126-4c10-9128-fcf8a74f7d00/sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound2.c[552,565]
[2022-10-17 10:18:06,013 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2022-10-17 10:18:06,027 INFO  L208         MainTranslator]: Completed translation
[2022-10-17 10:18:06,028 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:06 WrapperNode
[2022-10-17 10:18:06,028 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-10-17 10:18:06,030 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-10-17 10:18:06,030 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-10-17 10:18:06,030 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2022-10-17 10:18:06,038 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:06" (1/1) ...
[2022-10-17 10:18:06,046 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:06" (1/1) ...
[2022-10-17 10:18:06,067 INFO  L138                Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77
[2022-10-17 10:18:06,068 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-10-17 10:18:06,069 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-10-17 10:18:06,069 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2022-10-17 10:18:06,069 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2022-10-17 10:18:06,079 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:06" (1/1) ...
[2022-10-17 10:18:06,079 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:06" (1/1) ...
[2022-10-17 10:18:06,081 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:06" (1/1) ...
[2022-10-17 10:18:06,081 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:06" (1/1) ...
[2022-10-17 10:18:06,086 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:06" (1/1) ...
[2022-10-17 10:18:06,091 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:06" (1/1) ...
[2022-10-17 10:18:06,092 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:06" (1/1) ...
[2022-10-17 10:18:06,094 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:06" (1/1) ...
[2022-10-17 10:18:06,096 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-10-17 10:18:06,097 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-10-17 10:18:06,097 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2022-10-17 10:18:06,098 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2022-10-17 10:18:06,099 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:06" (1/1) ...
[2022-10-17 10:18:06,106 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-10-17 10:18:06,131 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/z3
[2022-10-17 10:18:06,151 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-10-17 10:18:06,168 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-10-17 10:18:06,205 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-10-17 10:18:06,206 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2022-10-17 10:18:06,206 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2022-10-17 10:18:06,206 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2022-10-17 10:18:06,206 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-10-17 10:18:06,207 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-10-17 10:18:06,207 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-10-17 10:18:06,209 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-10-17 10:18:06,284 INFO  L235             CfgBuilder]: Building ICFG
[2022-10-17 10:18:06,287 INFO  L261             CfgBuilder]: Building CFG for each procedure with an implementation
[2022-10-17 10:18:06,570 INFO  L276             CfgBuilder]: Performing block encoding
[2022-10-17 10:18:06,592 INFO  L295             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-10-17 10:18:06,592 INFO  L300             CfgBuilder]: Removed 3 assume(true) statements.
[2022-10-17 10:18:06,594 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:18:06 BoogieIcfgContainer
[2022-10-17 10:18:06,595 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-10-17 10:18:06,598 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-10-17 10:18:06,598 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2022-10-17 10:18:06,610 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2022-10-17 10:18:06,611 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:18:05" (1/3) ...
[2022-10-17 10:18:06,611 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c024f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:18:06, skipping insertion in model container
[2022-10-17 10:18:06,612 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:18:06" (2/3) ...
[2022-10-17 10:18:06,612 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c024f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:18:06, skipping insertion in model container
[2022-10-17 10:18:06,612 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:18:06" (3/3) ...
[2022-10-17 10:18:06,613 INFO  L112   eAbstractionObserver]: Analyzing ICFG lcm1_unwindbound2.c
[2022-10-17 10:18:06,646 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-10-17 10:18:06,646 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-10-17 10:18:06,714 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-10-17 10:18:06,730 INFO  L357      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2b69a6a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2022-10-17 10:18:06,730 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-10-17 10:18:06,747 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9)
[2022-10-17 10:18:06,758 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2022-10-17 10:18:06,764 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-17 10:18:06,765 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-10-17 10:18:06,766 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-10-17 10:18:06,775 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-17 10:18:06,775 INFO  L85        PathProgramCache]: Analyzing trace with hash 1730809867, now seen corresponding path program 1 times
[2022-10-17 10:18:06,785 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-17 10:18:06,786 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37370477]
[2022-10-17 10:18:06,786 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-17 10:18:06,787 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-17 10:18:06,935 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-17 10:18:06,989 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-17 10:18:06,989 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37370477]
[2022-10-17 10:18:06,990 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic
[2022-10-17 10:18:06,990 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776467467]
[2022-10-17 10:18:06,990 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-17 10:18:06,991 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-17 10:18:06,991 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/z3
[2022-10-17 10:18:06,993 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-10-17 10:18:07,009 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-10-17 10:18:07,097 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-17 10:18:07,099 INFO  L263         TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 1 conjunts are in the unsatisfiable core
[2022-10-17 10:18:07,104 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-10-17 10:18:07,131 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2022-10-17 10:18:07,132 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-10-17 10:18:07,132 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [776467467] provided 1 perfect and 0 imperfect interpolant sequences
[2022-10-17 10:18:07,133 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-10-17 10:18:07,133 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-10-17 10:18:07,135 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030252124]
[2022-10-17 10:18:07,136 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-10-17 10:18:07,141 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-10-17 10:18:07,141 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-17 10:18:07,170 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-10-17 10:18:07,171 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-10-17 10:18:07,173 INFO  L87              Difference]: Start difference. First operand  has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand  has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4)
[2022-10-17 10:18:07,199 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-10-17 10:18:07,200 INFO  L93              Difference]: Finished difference Result 67 states and 109 transitions.
[2022-10-17 10:18:07,201 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2022-10-17 10:18:07,203 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28
[2022-10-17 10:18:07,203 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-10-17 10:18:07,211 INFO  L225             Difference]: With dead ends: 67
[2022-10-17 10:18:07,211 INFO  L226             Difference]: Without dead ends: 31
[2022-10-17 10:18:07,215 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-10-17 10:18:07,220 INFO  L413           NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-10-17 10:18:07,221 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-10-17 10:18:07,240 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2022-10-17 10:18:07,260 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31.
[2022-10-17 10:18:07,261 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 31 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2022-10-17 10:18:07,263 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions.
[2022-10-17 10:18:07,265 INFO  L78                 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 28
[2022-10-17 10:18:07,265 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-10-17 10:18:07,266 INFO  L495      AbstractCegarLoop]: Abstraction has 31 states and 43 transitions.
[2022-10-17 10:18:07,266 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4)
[2022-10-17 10:18:07,266 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions.
[2022-10-17 10:18:07,268 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-10-17 10:18:07,269 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-17 10:18:07,269 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-10-17 10:18:07,310 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-10-17 10:18:07,485 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0
[2022-10-17 10:18:07,486 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-10-17 10:18:07,486 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-17 10:18:07,487 INFO  L85        PathProgramCache]: Analyzing trace with hash -1744809392, now seen corresponding path program 1 times
[2022-10-17 10:18:07,487 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-17 10:18:07,487 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270482306]
[2022-10-17 10:18:07,487 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-17 10:18:07,488 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-17 10:18:07,547 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-10-17 10:18:07,549 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297412455]
[2022-10-17 10:18:07,550 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-17 10:18:07,551 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-17 10:18:07,551 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/z3
[2022-10-17 10:18:07,554 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-10-17 10:18:07,561 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-10-17 10:18:07,639 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-17 10:18:07,640 INFO  L263         TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core
[2022-10-17 10:18:07,643 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-10-17 10:18:07,734 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2022-10-17 10:18:07,735 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-10-17 10:18:07,735 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-17 10:18:07,735 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270482306]
[2022-10-17 10:18:07,735 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-10-17 10:18:07,736 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297412455]
[2022-10-17 10:18:07,736 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [297412455] provided 1 perfect and 0 imperfect interpolant sequences
[2022-10-17 10:18:07,736 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-10-17 10:18:07,736 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-10-17 10:18:07,737 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164420103]
[2022-10-17 10:18:07,737 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-10-17 10:18:07,738 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-10-17 10:18:07,738 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-17 10:18:07,739 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-10-17 10:18:07,739 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-10-17 10:18:07,739 INFO  L87              Difference]: Start difference. First operand 31 states and 43 transitions. Second operand  has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4)
[2022-10-17 10:18:07,882 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-10-17 10:18:07,882 INFO  L93              Difference]: Finished difference Result 51 states and 72 transitions.
[2022-10-17 10:18:07,883 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2022-10-17 10:18:07,883 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29
[2022-10-17 10:18:07,884 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-10-17 10:18:07,885 INFO  L225             Difference]: With dead ends: 51
[2022-10-17 10:18:07,885 INFO  L226             Difference]: Without dead ends: 49
[2022-10-17 10:18:07,886 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2022-10-17 10:18:07,888 INFO  L413           NwaCegarLoop]: 36 mSDtfsCounter, 16 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-10-17 10:18:07,888 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 122 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-10-17 10:18:07,890 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 49 states.
[2022-10-17 10:18:07,901 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47.
[2022-10-17 10:18:07,902 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 47 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 32 states have internal predecessors, (44), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2022-10-17 10:18:07,904 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 67 transitions.
[2022-10-17 10:18:07,904 INFO  L78                 Accepts]: Start accepts. Automaton has 47 states and 67 transitions. Word has length 29
[2022-10-17 10:18:07,905 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-10-17 10:18:07,905 INFO  L495      AbstractCegarLoop]: Abstraction has 47 states and 67 transitions.
[2022-10-17 10:18:07,905 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4)
[2022-10-17 10:18:07,906 INFO  L276                IsEmpty]: Start isEmpty. Operand 47 states and 67 transitions.
[2022-10-17 10:18:07,907 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 30
[2022-10-17 10:18:07,907 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-17 10:18:07,907 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-10-17 10:18:07,946 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-10-17 10:18:08,125 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-17 10:18:08,126 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-10-17 10:18:08,126 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-17 10:18:08,126 INFO  L85        PathProgramCache]: Analyzing trace with hash -1746477688, now seen corresponding path program 1 times
[2022-10-17 10:18:08,126 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-17 10:18:08,127 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381490122]
[2022-10-17 10:18:08,127 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-17 10:18:08,127 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-17 10:18:08,146 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-10-17 10:18:08,146 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [584932951]
[2022-10-17 10:18:08,146 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-17 10:18:08,147 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-17 10:18:08,147 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/z3
[2022-10-17 10:18:08,148 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-10-17 10:18:08,153 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-10-17 10:18:08,205 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-10-17 10:18:08,207 INFO  L263         TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core
[2022-10-17 10:18:08,208 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2022-10-17 10:18:08,271 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2022-10-17 10:18:08,272 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-10-17 10:18:08,272 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-10-17 10:18:08,272 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381490122]
[2022-10-17 10:18:08,272 WARN  L310   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-10-17 10:18:08,273 INFO  L333   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584932951]
[2022-10-17 10:18:08,273 INFO  L157   FreeRefinementEngine]: IpTcStrategyModuleZ3 [584932951] provided 1 perfect and 0 imperfect interpolant sequences
[2022-10-17 10:18:08,273 INFO  L184   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-10-17 10:18:08,273 INFO  L197   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-10-17 10:18:08,274 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598626360]
[2022-10-17 10:18:08,274 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-10-17 10:18:08,274 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-10-17 10:18:08,275 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-10-17 10:18:08,275 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-10-17 10:18:08,275 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-10-17 10:18:08,276 INFO  L87              Difference]: Start difference. First operand 47 states and 67 transitions. Second operand  has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4)
[2022-10-17 10:18:08,294 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-10-17 10:18:08,294 INFO  L93              Difference]: Finished difference Result 57 states and 78 transitions.
[2022-10-17 10:18:08,295 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2022-10-17 10:18:08,295 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29
[2022-10-17 10:18:08,296 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2022-10-17 10:18:08,297 INFO  L225             Difference]: With dead ends: 57
[2022-10-17 10:18:08,313 INFO  L226             Difference]: Without dead ends: 49
[2022-10-17 10:18:08,314 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-10-17 10:18:08,315 INFO  L413           NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-10-17 10:18:08,316 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-10-17 10:18:08,317 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 49 states.
[2022-10-17 10:18:08,325 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49.
[2022-10-17 10:18:08,325 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 49 states, 33 states have (on average 1.393939393939394) internal successors, (46), 34 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2022-10-17 10:18:08,327 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions.
[2022-10-17 10:18:08,327 INFO  L78                 Accepts]: Start accepts. Automaton has 49 states and 69 transitions. Word has length 29
[2022-10-17 10:18:08,328 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2022-10-17 10:18:08,328 INFO  L495      AbstractCegarLoop]: Abstraction has 49 states and 69 transitions.
[2022-10-17 10:18:08,328 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4)
[2022-10-17 10:18:08,328 INFO  L276                IsEmpty]: Start isEmpty. Operand 49 states and 69 transitions.
[2022-10-17 10:18:08,329 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2022-10-17 10:18:08,330 INFO  L187           NwaCegarLoop]: Found error trace
[2022-10-17 10:18:08,330 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-10-17 10:18:08,393 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2022-10-17 10:18:08,547 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-17 10:18:08,547 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-10-17 10:18:08,548 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2022-10-17 10:18:08,548 INFO  L85        PathProgramCache]: Analyzing trace with hash -1754973556, now seen corresponding path program 1 times
[2022-10-17 10:18:08,548 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-10-17 10:18:08,549 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218516052]
[2022-10-17 10:18:08,549 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-17 10:18:08,549 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-10-17 10:18:08,567 ERROR L245   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-10-17 10:18:08,567 INFO  L333   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995842732]
[2022-10-17 10:18:08,567 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-10-17 10:18:08,568 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-10-17 10:18:08,568 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/z3
[2022-10-17 10:18:08,569 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-10-17 10:18:08,570 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05a16b52-8126-4c10-9128-fcf8a74f7d00/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process