./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem07_label52.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 47ea0209
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc2dd867-7698-4f58-b842-df14d1c95de9/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc2dd867-7698-4f58-b842-df14d1c95de9/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc2dd867-7698-4f58-b842-df14d1c95de9/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc2dd867-7698-4f58-b842-df14d1c95de9/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem07_label52.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc2dd867-7698-4f58-b842-df14d1c95de9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc2dd867-7698-4f58-b842-df14d1c95de9/bin/utaipan-UUZaoUuFF8 --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 300dca2efecc5c8214152db2a6b2d689ec4c315eac2b659302619d92ad8af6b0
--- Real Ultimate output ---
This is Ultimate 0.2.1-dev-47ea020
[2021-11-07 01:11:20,989 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-11-07 01:11:20,992 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2021-11-07 01:11:21,056 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-11-07 01:11:21,057 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-11-07 01:11:21,063 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-11-07 01:11:21,065 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-11-07 01:11:21,069 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2021-11-07 01:11:21,072 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-11-07 01:11:21,079 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-11-07 01:11:21,080 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2021-11-07 01:11:21,082 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-11-07 01:11:21,083 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-11-07 01:11:21,085 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-11-07 01:11:21,087 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-11-07 01:11:21,093 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-11-07 01:11:21,095 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-11-07 01:11:21,096 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-11-07 01:11:21,102 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-11-07 01:11:21,106 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-11-07 01:11:21,108 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-11-07 01:11:21,112 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-11-07 01:11:21,116 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-11-07 01:11:21,117 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-11-07 01:11:21,123 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-11-07 01:11:21,124 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-11-07 01:11:21,124 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-11-07 01:11:21,126 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-11-07 01:11:21,127 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-11-07 01:11:21,128 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-11-07 01:11:21,129 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-11-07 01:11:21,130 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-11-07 01:11:21,132 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-11-07 01:11:21,133 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2021-11-07 01:11:21,134 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-11-07 01:11:21,134 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2021-11-07 01:11:21,135 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-11-07 01:11:21,135 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-11-07 01:11:21,136 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2021-11-07 01:11:21,136 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2021-11-07 01:11:21,137 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-11-07 01:11:21,138 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc2dd867-7698-4f58-b842-df14d1c95de9/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf
[2021-11-07 01:11:21,174 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-11-07 01:11:21,174 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-11-07 01:11:21,175 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2021-11-07 01:11:21,176 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2021-11-07 01:11:21,176 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2021-11-07 01:11:21,176 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2021-11-07 01:11:21,176 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2021-11-07 01:11:21,176 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2021-11-07 01:11:21,177 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2021-11-07 01:11:21,177 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2021-11-07 01:11:21,177 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2021-11-07 01:11:21,177 INFO  L138        SettingsManager]:  * Interval Domain=false
[2021-11-07 01:11:21,177 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2021-11-07 01:11:21,178 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2021-11-07 01:11:21,178 INFO  L138        SettingsManager]:  * Simplification Technique=SIMPLIFY_QUICK
[2021-11-07 01:11:21,179 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-11-07 01:11:21,179 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-11-07 01:11:21,179 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-11-07 01:11:21,179 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-11-07 01:11:21,179 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-11-07 01:11:21,180 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-11-07 01:11:21,180 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-11-07 01:11:21,180 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-11-07 01:11:21,180 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2021-11-07 01:11:21,180 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-11-07 01:11:21,181 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-11-07 01:11:21,181 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-11-07 01:11:21,181 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-11-07 01:11:21,181 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-11-07 01:11:21,181 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-11-07 01:11:21,182 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-11-07 01:11:21,182 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-11-07 01:11:21,182 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2021-11-07 01:11:21,182 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-11-07 01:11:21,183 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2021-11-07 01:11:21,183 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-11-07 01:11:21,183 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-11-07 01:11:21,183 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2021-11-07 01:11:21,183 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2021-11-07 01:11:21,184 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc2dd867-7698-4f58-b842-df14d1c95de9/bin/utaipan-UUZaoUuFF8/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_cc2dd867-7698-4f58-b842-df14d1c95de9/bin/utaipan-UUZaoUuFF8
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 -> 300dca2efecc5c8214152db2a6b2d689ec4c315eac2b659302619d92ad8af6b0
[2021-11-07 01:11:21,472 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-11-07 01:11:21,508 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-11-07 01:11:21,511 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-11-07 01:11:21,512 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-11-07 01:11:21,513 INFO  L275        PluginConnector]: CDTParser initialized
[2021-11-07 01:11:21,514 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc2dd867-7698-4f58-b842-df14d1c95de9/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/eca-rers2012/Problem07_label52.c
[2021-11-07 01:11:21,586 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc2dd867-7698-4f58-b842-df14d1c95de9/bin/utaipan-UUZaoUuFF8/data/0bd7f7bd9/dd4aa8b400d64043b53409b183255240/FLAG32984502d
[2021-11-07 01:11:24,057 INFO  L306              CDTParser]: Found 1 translation units.
[2021-11-07 01:11:24,072 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc2dd867-7698-4f58-b842-df14d1c95de9/sv-benchmarks/c/eca-rers2012/Problem07_label52.c
[2021-11-07 01:11:24,223 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc2dd867-7698-4f58-b842-df14d1c95de9/bin/utaipan-UUZaoUuFF8/data/0bd7f7bd9/dd4aa8b400d64043b53409b183255240/FLAG32984502d
[2021-11-07 01:11:24,450 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc2dd867-7698-4f58-b842-df14d1c95de9/bin/utaipan-UUZaoUuFF8/data/0bd7f7bd9/dd4aa8b400d64043b53409b183255240
[2021-11-07 01:11:24,453 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-11-07 01:11:24,455 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2021-11-07 01:11:24,456 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-11-07 01:11:24,456 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-11-07 01:11:24,460 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-11-07 01:11:24,460 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:24" (1/1) ...
[2021-11-07 01:11:24,461 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d686961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:24, skipping insertion in model container
[2021-11-07 01:11:24,462 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:24" (1/1) ...
[2021-11-07 01:11:24,469 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-11-07 01:11:25,370 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-11-07 01:11:37,569 WARN  L228   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_cc2dd867-7698-4f58-b842-df14d1c95de9/sv-benchmarks/c/eca-rers2012/Problem07_label52.c[2776488,2776501]
[2021-11-07 01:11:37,636 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-11-07 01:11:37,647 INFO  L203         MainTranslator]: Completed pre-run
[2021-11-07 01:11:44,896 WARN  L228   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_cc2dd867-7698-4f58-b842-df14d1c95de9/sv-benchmarks/c/eca-rers2012/Problem07_label52.c[2776488,2776501]
[2021-11-07 01:11:44,900 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-11-07 01:11:46,050 INFO  L208         MainTranslator]: Completed translation
[2021-11-07 01:11:46,050 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:46 WrapperNode
[2021-11-07 01:11:46,051 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-11-07 01:11:46,052 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-11-07 01:11:46,052 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-11-07 01:11:46,053 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2021-11-07 01:11:46,061 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:46" (1/1) ...
[2021-11-07 01:11:47,143 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:46" (1/1) ...
[2021-11-07 01:11:50,348 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-11-07 01:11:50,349 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-11-07 01:11:50,349 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-11-07 01:11:50,349 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-11-07 01:11:50,361 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:46" (1/1) ...
[2021-11-07 01:11:50,375 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:46" (1/1) ...
[2021-11-07 01:11:50,854 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:46" (1/1) ...
[2021-11-07 01:11:50,855 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:46" (1/1) ...
[2021-11-07 01:11:52,483 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:46" (1/1) ...
[2021-11-07 01:11:52,687 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:46" (1/1) ...
[2021-11-07 01:11:53,025 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:46" (1/1) ...
[2021-11-07 01:11:53,437 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-11-07 01:11:53,438 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-11-07 01:11:53,439 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-11-07 01:11:53,439 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-11-07 01:11:53,441 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:46" (1/1) ...
[2021-11-07 01:11:53,453 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-11-07 01:11:53,464 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc2dd867-7698-4f58-b842-df14d1c95de9/bin/utaipan-UUZaoUuFF8/z3
[2021-11-07 01:11:53,480 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc2dd867-7698-4f58-b842-df14d1c95de9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2021-11-07 01:11:53,482 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc2dd867-7698-4f58-b842-df14d1c95de9/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2021-11-07 01:11:53,520 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-11-07 01:11:53,520 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-11-07 01:11:53,520 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-11-07 01:11:53,520 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-11-07 01:12:34,552 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-11-07 01:12:34,553 INFO  L299             CfgBuilder]: Removed 97 assume(true) statements.
[2021-11-07 01:12:34,567 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:12:34 BoogieIcfgContainer
[2021-11-07 01:12:34,568 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-11-07 01:12:34,570 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-11-07 01:12:34,570 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-11-07 01:12:34,575 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-11-07 01:12:34,576 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:11:24" (1/3) ...
[2021-11-07 01:12:34,576 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea62599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:12:34, skipping insertion in model container
[2021-11-07 01:12:34,577 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:46" (2/3) ...
[2021-11-07 01:12:34,577 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea62599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:12:34, skipping insertion in model container
[2021-11-07 01:12:34,577 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:12:34" (3/3) ...
[2021-11-07 01:12:34,578 INFO  L111   eAbstractionObserver]: Analyzing ICFG Problem07_label52.c
[2021-11-07 01:12:34,583 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-11-07 01:12:34,583 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2021-11-07 01:12:34,669 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2021-11-07 01:12:34,676 INFO  L339      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, mLoopAccelerationTechnique=FAST_UPR
[2021-11-07 01:12:34,677 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-11-07 01:12:34,862 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 10135 states, 10133 states have (on average 1.9951643146156124) internal successors, (20217), 10134 states have internal predecessors, (20217), 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)
[2021-11-07 01:12:35,841 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10086
[2021-11-07 01:12:35,841 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-07 01:12:35,848 INFO  L513         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2021-11-07 01:12:35,850 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-07 01:12:35,856 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-07 01:12:35,864 INFO  L85        PathProgramCache]: Analyzing trace with hash 184884729, now seen corresponding path program 1 times
[2021-11-07 01:12:35,874 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-07 01:12:35,875 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831159619]
[2021-11-07 01:12:35,880 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-07 01:12:35,881 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-07 01:12:38,885 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:13:05,453 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-07 01:13:05,453 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-07 01:13:05,454 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831159619]
[2021-11-07 01:13:05,455 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831159619] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-07 01:13:05,455 INFO  L186   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-11-07 01:13:05,457 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-11-07 01:13:05,460 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001614849]
[2021-11-07 01:13:05,483 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-07 01:13:05,483 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-07 01:13:05,500 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-07 01:13:05,501 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-07 01:13:05,539 INFO  L87              Difference]: Start difference. First operand  has 10135 states, 10133 states have (on average 1.9951643146156124) internal successors, (20217), 10134 states have internal predecessors, (20217), 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 3 states, 3 states have (on average 3361.6666666666665) internal successors, (10085), 2 states have internal predecessors, (10085), 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)
[2021-11-07 01:13:44,425 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-07 01:13:44,425 INFO  L93              Difference]: Finished difference Result 30401 states and 60647 transitions.
[2021-11-07 01:13:44,426 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-07 01:13:44,432 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 3361.6666666666665) internal successors, (10085), 2 states have internal predecessors, (10085), 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 10085
[2021-11-07 01:13:44,467 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-07 01:13:44,612 INFO  L225             Difference]: With dead ends: 30401
[2021-11-07 01:13:44,612 INFO  L226             Difference]: Without dead ends: 20263
[2021-11-07 01:13:44,630 INFO  L786         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-07 01:13:44,688 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20263 states.
[2021-11-07 01:13:45,150 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20263 to 20263.
[2021-11-07 01:13:45,193 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 20263 states, 20262 states have (on average 1.799279439344586) internal successors, (36457), 20262 states have internal predecessors, (36457), 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)
[2021-11-07 01:13:45,275 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 20263 states to 20263 states and 36457 transitions.
[2021-11-07 01:13:45,276 INFO  L78                 Accepts]: Start accepts. Automaton has 20263 states and 36457 transitions. Word has length 10085
[2021-11-07 01:13:45,296 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-07 01:13:45,296 INFO  L470      AbstractCegarLoop]: Abstraction has 20263 states and 36457 transitions.
[2021-11-07 01:13:45,300 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 3361.6666666666665) internal successors, (10085), 2 states have internal predecessors, (10085), 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)
[2021-11-07 01:13:45,300 INFO  L276                IsEmpty]: Start isEmpty. Operand 20263 states and 36457 transitions.
[2021-11-07 01:13:46,663 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10090
[2021-11-07 01:13:46,663 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-07 01:13:46,669 INFO  L513         BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2021-11-07 01:13:46,670 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-11-07 01:13:46,670 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-07 01:13:46,671 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-07 01:13:46,677 INFO  L85        PathProgramCache]: Analyzing trace with hash 987459489, now seen corresponding path program 1 times
[2021-11-07 01:13:46,677 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-07 01:13:46,678 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261069600]
[2021-11-07 01:13:46,682 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-07 01:13:46,682 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-07 01:13:47,728 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat