./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem07_label26.c --full-output --architecture 32bit


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


Checking for ERROR reachability
Using default analysis
Version 9ad7fb26
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d15bd903-32b3-4e49-97b0-b611b30f5e83/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d15bd903-32b3-4e49-97b0-b611b30f5e83/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d15bd903-32b3-4e49-97b0-b611b30f5e83/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d15bd903-32b3-4e49-97b0-b611b30f5e83/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem07_label26.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d15bd903-32b3-4e49-97b0-b611b30f5e83/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d15bd903-32b3-4e49-97b0-b611b30f5e83/bin/utaipan-aC7eJsxGYH --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 99ca606f39e8e89c81ae97710d3cffb62ce706661ab0895e651aaa8a954b23f1
--- Real Ultimate output ---
This is Ultimate 0.2.1-dev-9ad7fb2
[2021-11-03 04:23:57,529 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-11-03 04:23:57,532 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2021-11-03 04:23:57,569 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-11-03 04:23:57,572 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-11-03 04:23:57,577 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-11-03 04:23:57,581 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-11-03 04:23:57,584 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2021-11-03 04:23:57,587 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-11-03 04:23:57,588 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-11-03 04:23:57,590 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2021-11-03 04:23:57,591 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-11-03 04:23:57,593 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-11-03 04:23:57,600 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-11-03 04:23:57,603 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-11-03 04:23:57,606 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-11-03 04:23:57,609 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-11-03 04:23:57,612 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-11-03 04:23:57,619 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-11-03 04:23:57,629 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-11-03 04:23:57,632 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-11-03 04:23:57,634 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-11-03 04:23:57,637 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-11-03 04:23:57,639 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-11-03 04:23:57,651 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-11-03 04:23:57,651 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-11-03 04:23:57,652 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-11-03 04:23:57,655 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-11-03 04:23:57,655 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-11-03 04:23:57,657 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-11-03 04:23:57,658 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-11-03 04:23:57,659 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-11-03 04:23:57,662 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-11-03 04:23:57,664 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2021-11-03 04:23:57,666 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-11-03 04:23:57,666 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2021-11-03 04:23:57,667 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-11-03 04:23:57,668 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-11-03 04:23:57,668 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2021-11-03 04:23:57,669 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2021-11-03 04:23:57,670 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-11-03 04:23:57,671 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d15bd903-32b3-4e49-97b0-b611b30f5e83/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf
[2021-11-03 04:23:57,726 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-11-03 04:23:57,729 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-11-03 04:23:57,731 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2021-11-03 04:23:57,731 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2021-11-03 04:23:57,732 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2021-11-03 04:23:57,732 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2021-11-03 04:23:57,732 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2021-11-03 04:23:57,733 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2021-11-03 04:23:57,740 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2021-11-03 04:23:57,741 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2021-11-03 04:23:57,742 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2021-11-03 04:23:57,743 INFO  L138        SettingsManager]:  * Interval Domain=false
[2021-11-03 04:23:57,743 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2021-11-03 04:23:57,743 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2021-11-03 04:23:57,744 INFO  L138        SettingsManager]:  * Simplification Technique=SIMPLIFY_QUICK
[2021-11-03 04:23:57,745 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-11-03 04:23:57,745 INFO  L138        SettingsManager]:  * sizeof long=4
[2021-11-03 04:23:57,746 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-11-03 04:23:57,746 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2021-11-03 04:23:57,746 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-11-03 04:23:57,747 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-11-03 04:23:57,747 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-11-03 04:23:57,748 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-11-03 04:23:57,748 INFO  L138        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2021-11-03 04:23:57,749 INFO  L138        SettingsManager]:  * sizeof long double=12
[2021-11-03 04:23:57,749 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-11-03 04:23:57,749 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-11-03 04:23:57,750 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-11-03 04:23:57,750 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-11-03 04:23:57,752 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-11-03 04:23:57,752 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-11-03 04:23:57,753 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-11-03 04:23:57,753 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2021-11-03 04:23:57,754 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-11-03 04:23:57,754 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2021-11-03 04:23:57,755 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-11-03 04:23:57,755 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-11-03 04:23:57,755 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2021-11-03 04:23:57,756 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2021-11-03 04:23:57,756 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_d15bd903-32b3-4e49-97b0-b611b30f5e83/bin/utaipan-aC7eJsxGYH/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_d15bd903-32b3-4e49-97b0-b611b30f5e83/bin/utaipan-aC7eJsxGYH
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 -> 99ca606f39e8e89c81ae97710d3cffb62ce706661ab0895e651aaa8a954b23f1
[2021-11-03 04:23:58,137 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-11-03 04:23:58,167 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-11-03 04:23:58,171 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-11-03 04:23:58,172 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-11-03 04:23:58,173 INFO  L275        PluginConnector]: CDTParser initialized
[2021-11-03 04:23:58,175 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d15bd903-32b3-4e49-97b0-b611b30f5e83/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/eca-rers2012/Problem07_label26.c
[2021-11-03 04:23:58,263 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d15bd903-32b3-4e49-97b0-b611b30f5e83/bin/utaipan-aC7eJsxGYH/data/d884635ff/e3c39b1c3d3a4d099c4715f97d0fca11/FLAG938ee714a
[2021-11-03 04:24:01,640 INFO  L306              CDTParser]: Found 1 translation units.
[2021-11-03 04:24:01,640 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d15bd903-32b3-4e49-97b0-b611b30f5e83/sv-benchmarks/c/eca-rers2012/Problem07_label26.c
[2021-11-03 04:24:01,809 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d15bd903-32b3-4e49-97b0-b611b30f5e83/bin/utaipan-aC7eJsxGYH/data/d884635ff/e3c39b1c3d3a4d099c4715f97d0fca11/FLAG938ee714a
[2021-11-03 04:24:02,229 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d15bd903-32b3-4e49-97b0-b611b30f5e83/bin/utaipan-aC7eJsxGYH/data/d884635ff/e3c39b1c3d3a4d099c4715f97d0fca11
[2021-11-03 04:24:02,232 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-11-03 04:24:02,234 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2021-11-03 04:24:02,236 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-11-03 04:24:02,236 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-11-03 04:24:02,240 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-11-03 04:24:02,241 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:24:02" (1/1) ...
[2021-11-03 04:24:02,242 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fbc9948 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:02, skipping insertion in model container
[2021-11-03 04:24:02,242 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:24:02" (1/1) ...
[2021-11-03 04:24:02,250 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-11-03 04:24:03,275 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-11-03 04:24:15,856 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_d15bd903-32b3-4e49-97b0-b611b30f5e83/sv-benchmarks/c/eca-rers2012/Problem07_label26.c[2775806,2775819]
[2021-11-03 04:24:16,044 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-11-03 04:24:16,055 INFO  L203         MainTranslator]: Completed pre-run
[2021-11-03 04:24:23,830 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_d15bd903-32b3-4e49-97b0-b611b30f5e83/sv-benchmarks/c/eca-rers2012/Problem07_label26.c[2775806,2775819]
[2021-11-03 04:24:23,834 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-11-03 04:24:24,882 INFO  L208         MainTranslator]: Completed translation
[2021-11-03 04:24:24,882 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:24 WrapperNode
[2021-11-03 04:24:24,882 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-11-03 04:24:24,884 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-11-03 04:24:24,884 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-11-03 04:24:24,884 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2021-11-03 04:24:24,901 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:24" (1/1) ...
[2021-11-03 04:24:25,862 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:24" (1/1) ...
[2021-11-03 04:24:28,610 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-11-03 04:24:28,612 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-11-03 04:24:28,612 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-11-03 04:24:28,613 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-11-03 04:24:28,625 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:24" (1/1) ...
[2021-11-03 04:24:28,627 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:24" (1/1) ...
[2021-11-03 04:24:29,480 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:24" (1/1) ...
[2021-11-03 04:24:29,481 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:24" (1/1) ...
[2021-11-03 04:24:30,873 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:24" (1/1) ...
[2021-11-03 04:24:31,066 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:24" (1/1) ...
[2021-11-03 04:24:31,491 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:24" (1/1) ...
[2021-11-03 04:24:32,121 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-11-03 04:24:32,123 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-11-03 04:24:32,123 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-11-03 04:24:32,123 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-11-03 04:24:32,125 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:24" (1/1) ...
[2021-11-03 04:24:32,137 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-11-03 04:24:32,148 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d15bd903-32b3-4e49-97b0-b611b30f5e83/bin/utaipan-aC7eJsxGYH/z3
[2021-11-03 04:24:32,166 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d15bd903-32b3-4e49-97b0-b611b30f5e83/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2021-11-03 04:24:32,179 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d15bd903-32b3-4e49-97b0-b611b30f5e83/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2021-11-03 04:24:32,205 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-11-03 04:24:32,205 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2021-11-03 04:24:32,205 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-11-03 04:24:32,205 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-11-03 04:25:13,237 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-11-03 04:25:13,238 INFO  L299             CfgBuilder]: Removed 97 assume(true) statements.
[2021-11-03 04:25:13,255 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:25:13 BoogieIcfgContainer
[2021-11-03 04:25:13,255 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-11-03 04:25:13,259 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-11-03 04:25:13,259 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-11-03 04:25:13,263 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-11-03 04:25:13,263 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:24:02" (1/3) ...
[2021-11-03 04:25:13,265 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ecc2a71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:25:13, skipping insertion in model container
[2021-11-03 04:25:13,265 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:24:24" (2/3) ...
[2021-11-03 04:25:13,265 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ecc2a71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:25:13, skipping insertion in model container
[2021-11-03 04:25:13,266 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:25:13" (3/3) ...
[2021-11-03 04:25:13,268 INFO  L111   eAbstractionObserver]: Analyzing ICFG Problem07_label26.c
[2021-11-03 04:25:13,277 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-11-03 04:25:13,278 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2021-11-03 04:25:13,375 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2021-11-03 04:25:13,383 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
[2021-11-03 04:25:13,383 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-11-03 04:25:13,668 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)
[2021-11-03 04:25:14,546 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10086
[2021-11-03 04:25:14,546 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-03 04:25:14,554 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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[2021-11-03 04:25:14,556 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-03 04:25:14,563 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-03 04:25:14,573 INFO  L85        PathProgramCache]: Analyzing trace with hash 64794232, now seen corresponding path program 1 times
[2021-11-03 04:25:14,584 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-03 04:25:14,585 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643136728]
[2021-11-03 04:25:14,590 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-03 04:25:14,592 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-03 04:25:18,054 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-03 04:25:47,241 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-03 04:25:47,243 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-03 04:25:47,243 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643136728]
[2021-11-03 04:25:47,244 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643136728] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-03 04:25:47,245 INFO  L186   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-11-03 04:25:47,247 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-11-03 04:25:47,258 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892198833]
[2021-11-03 04:25:47,278 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-11-03 04:25:47,279 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-03 04:25:47,300 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-11-03 04:25:47,302 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2021-11-03 04:25:47,347 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 4 states, 4 states have (on average 2521.25) internal successors, (10085), 3 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)
[2021-11-03 04:26:55,109 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-03 04:26:55,110 INFO  L93              Difference]: Finished difference Result 40533 states and 80861 transitions.
[2021-11-03 04:26:55,110 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2021-11-03 04:26:55,115 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 2521.25) internal successors, (10085), 3 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
[2021-11-03 04:26:55,147 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-03 04:26:55,353 INFO  L225             Difference]: With dead ends: 40533
[2021-11-03 04:26:55,353 INFO  L226             Difference]: Without dead ends: 30393
[2021-11-03 04:26:55,381 INFO  L786         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2021-11-03 04:26:55,463 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30393 states.
[2021-11-03 04:26:56,109 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30393 to 30393.
[2021-11-03 04:26:56,177 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 30393 states, 30392 states have (on average 1.4995064490655436) internal successors, (45573), 30392 states have internal predecessors, (45573), 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)
[2021-11-03 04:26:56,289 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30393 states to 30393 states and 45573 transitions.
[2021-11-03 04:26:56,291 INFO  L78                 Accepts]: Start accepts. Automaton has 30393 states and 45573 transitions. Word has length 10085
[2021-11-03 04:26:56,313 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-03 04:26:56,313 INFO  L470      AbstractCegarLoop]: Abstraction has 30393 states and 45573 transitions.
[2021-11-03 04:26:56,318 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 2521.25) internal successors, (10085), 3 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)
[2021-11-03 04:26:56,319 INFO  L276                IsEmpty]: Start isEmpty. Operand 30393 states and 45573 transitions.
[2021-11-03 04:26:58,183 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12985
[2021-11-03 04:26:58,184 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-03 04:26:58,197 INFO  L513         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-03 04:26:58,198 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-11-03 04:26:58,198 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-03 04:26:58,199 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-03 04:26:58,204 INFO  L85        PathProgramCache]: Analyzing trace with hash -780986439, now seen corresponding path program 1 times
[2021-11-03 04:26:58,204 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-03 04:26:58,205 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349228180]
[2021-11-03 04:26:58,207 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-03 04:26:58,207 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-03 04:27:00,018 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-03 04:27:40,780 INFO  L134       CoverageAnalysis]: Checked inductivity of 2888 backedges. 2885 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2021-11-03 04:27:40,781 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-03 04:27:40,782 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349228180]
[2021-11-03 04:27:40,782 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349228180] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-03 04:27:40,782 INFO  L186   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-11-03 04:27:40,785 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-11-03 04:27:40,785 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282606534]
[2021-11-03 04:27:40,837 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-03 04:27:40,837 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-03 04:27:40,840 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-03 04:27:40,840 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-03 04:27:40,846 INFO  L87              Difference]: Start difference. First operand 30393 states and 45573 transitions. Second operand  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 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)
[2021-11-03 04:28:20,617 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-03 04:28:20,617 INFO  L93              Difference]: Finished difference Result 70915 states and 116444 transitions.
[2021-11-03 04:28:20,617 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-03 04:28:20,620 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 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 12984
[2021-11-03 04:28:20,628 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-03 04:28:20,714 INFO  L225             Difference]: With dead ends: 70915
[2021-11-03 04:28:20,714 INFO  L226             Difference]: Without dead ends: 50653
[2021-11-03 04:28:20,741 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
[2021-11-03 04:28:20,801 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 50653 states.
[2021-11-03 04:28:21,602 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 50653 to 50653.
[2021-11-03 04:28:21,663 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 50653 states, 50652 states have (on average 1.4573955618731738) internal successors, (73820), 50652 states have internal predecessors, (73820), 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)
[2021-11-03 04:28:21,756 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50653 states to 50653 states and 73820 transitions.
[2021-11-03 04:28:21,757 INFO  L78                 Accepts]: Start accepts. Automaton has 50653 states and 73820 transitions. Word has length 12984
[2021-11-03 04:28:21,770 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-03 04:28:21,770 INFO  L470      AbstractCegarLoop]: Abstraction has 50653 states and 73820 transitions.
[2021-11-03 04:28:21,773 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 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)
[2021-11-03 04:28:21,774 INFO  L276                IsEmpty]: Start isEmpty. Operand 50653 states and 73820 transitions.
[2021-11-03 04:28:23,561 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12986
[2021-11-03 04:28:23,561 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-03 04:28:23,569 INFO  L513         BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2021-11-03 04:28:23,570 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-11-03 04:28:23,570 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-03 04:28:23,570 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-03 04:28:23,574 INFO  L85        PathProgramCache]: Analyzing trace with hash -1345674161, now seen corresponding path program 1 times
[2021-11-03 04:28:23,574 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-03 04:28:23,575 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540278246]
[2021-11-03 04:28:23,577 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-03 04:28:23,577 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-03 04:28:24,587 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-03 04:29:03,332 INFO  L134       CoverageAnalysis]: Checked inductivity of 2890 backedges. 2890 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-03 04:29:03,334 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-03 04:29:03,334 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540278246]
[2021-11-03 04:29:03,335 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540278246] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-03 04:29:03,335 INFO  L186   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-11-03 04:29:03,344 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-11-03 04:29:03,345 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480032342]
[2021-11-03 04:29:03,358 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-03 04:29:03,359 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-03 04:29:03,360 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-03 04:29:03,360 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-03 04:29:03,365 INFO  L87              Difference]: Start difference. First operand 50653 states and 73820 transitions. Second operand  has 3 states, 3 states have (on average 4328.333333333333) internal successors, (12985), 3 states have internal predecessors, (12985), 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)
[2021-11-03 04:29:38,696 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-03 04:29:38,696 INFO  L93              Difference]: Finished difference Result 111435 states and 165527 transitions.
[2021-11-03 04:29:38,697 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-03 04:29:38,699 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 4328.333333333333) internal successors, (12985), 3 states have internal predecessors, (12985), 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 12985
[2021-11-03 04:29:38,705 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-03 04:29:38,838 INFO  L225             Difference]: With dead ends: 111435
[2021-11-03 04:29:38,838 INFO  L226             Difference]: Without dead ends: 70913
[2021-11-03 04:29:38,884 INFO  L786         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-03 04:29:38,949 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 70913 states.
[2021-11-03 04:29:39,857 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 70913 to 70913.
[2021-11-03 04:29:39,931 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 70913 states, 70912 states have (on average 1.412595893501805) internal successors, (100170), 70912 states have internal predecessors, (100170), 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)
[2021-11-03 04:29:40,387 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 70913 states to 70913 states and 100170 transitions.
[2021-11-03 04:29:40,392 INFO  L78                 Accepts]: Start accepts. Automaton has 70913 states and 100170 transitions. Word has length 12985
[2021-11-03 04:29:40,400 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-03 04:29:40,400 INFO  L470      AbstractCegarLoop]: Abstraction has 70913 states and 100170 transitions.
[2021-11-03 04:29:40,403 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 4328.333333333333) internal successors, (12985), 3 states have internal predecessors, (12985), 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)
[2021-11-03 04:29:40,403 INFO  L276                IsEmpty]: Start isEmpty. Operand 70913 states and 100170 transitions.
[2021-11-03 04:29:41,878 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12992
[2021-11-03 04:29:41,878 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-03 04:29:41,886 INFO  L513         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2021-11-03 04:29:41,886 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-11-03 04:29:41,886 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-03 04:29:41,888 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-03 04:29:41,894 INFO  L85        PathProgramCache]: Analyzing trace with hash -746705024, now seen corresponding path program 1 times
[2021-11-03 04:29:41,895 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-03 04:29:41,895 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50768026]
[2021-11-03 04:29:41,897 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-03 04:29:41,898 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-03 04:29:43,022 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-03 04:30:17,187 INFO  L134       CoverageAnalysis]: Checked inductivity of 2902 backedges. 2892 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2021-11-03 04:30:17,188 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-03 04:30:17,188 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50768026]
[2021-11-03 04:30:17,194 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50768026] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-03 04:30:17,194 INFO  L186   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-11-03 04:30:17,197 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-11-03 04:30:17,198 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616745501]
[2021-11-03 04:30:17,212 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-03 04:30:17,213 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-03 04:30:17,213 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-03 04:30:17,214 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-03 04:30:17,218 INFO  L87              Difference]: Start difference. First operand 70913 states and 100170 transitions. Second operand  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 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)
[2021-11-03 04:30:57,986 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-03 04:30:57,987 INFO  L93              Difference]: Finished difference Result 192475 states and 280235 transitions.
[2021-11-03 04:30:57,987 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-03 04:30:57,989 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 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 12991
[2021-11-03 04:30:57,992 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-03 04:30:58,475 INFO  L225             Difference]: With dead ends: 192475
[2021-11-03 04:30:58,475 INFO  L226             Difference]: Without dead ends: 131693
[2021-11-03 04:30:58,548 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
[2021-11-03 04:30:58,669 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 131693 states.
[2021-11-03 04:31:00,097 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 131693 to 131693.
[2021-11-03 04:31:00,223 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 131693 states, 131692 states have (on average 1.3217355648027216) internal successors, (174062), 131692 states have internal predecessors, (174062), 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)
[2021-11-03 04:31:00,449 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 131693 states to 131693 states and 174062 transitions.
[2021-11-03 04:31:00,450 INFO  L78                 Accepts]: Start accepts. Automaton has 131693 states and 174062 transitions. Word has length 12991
[2021-11-03 04:31:00,455 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-03 04:31:00,456 INFO  L470      AbstractCegarLoop]: Abstraction has 131693 states and 174062 transitions.
[2021-11-03 04:31:00,459 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 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)
[2021-11-03 04:31:00,461 INFO  L276                IsEmpty]: Start isEmpty. Operand 131693 states and 174062 transitions.
[2021-11-03 04:31:02,746 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13002
[2021-11-03 04:31:02,746 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-03 04:31:02,755 INFO  L513         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-03 04:31:02,756 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2021-11-03 04:31:02,757 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-03 04:31:02,757 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-03 04:31:02,762 INFO  L85        PathProgramCache]: Analyzing trace with hash -79818201, now seen corresponding path program 1 times
[2021-11-03 04:31:02,763 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-03 04:31:02,763 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192662029]
[2021-11-03 04:31:02,766 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-03 04:31:02,766 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-03 04:31:03,841 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-03 04:31:35,686 INFO  L134       CoverageAnalysis]: Checked inductivity of 2922 backedges. 2922 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-03 04:31:35,686 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-03 04:31:35,687 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192662029]
[2021-11-03 04:31:35,687 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192662029] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-03 04:31:35,687 INFO  L186   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-11-03 04:31:35,691 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-11-03 04:31:35,691 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775208016]
[2021-11-03 04:31:35,710 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-11-03 04:31:35,717 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-03 04:31:35,717 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-11-03 04:31:35,718 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-11-03 04:31:35,722 INFO  L87              Difference]: Start difference. First operand 131693 states and 174062 transitions. Second operand  has 4 states, 4 states have (on average 3250.25) internal successors, (13001), 3 states have internal predecessors, (13001), 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)
[2021-11-03 04:32:37,671 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-03 04:32:37,672 INFO  L93              Difference]: Finished difference Result 455855 states and 613939 transitions.
[2021-11-03 04:32:37,672 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2021-11-03 04:32:37,674 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3250.25) internal successors, (13001), 3 states have internal predecessors, (13001), 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 13001
[2021-11-03 04:32:37,676 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-03 04:32:38,311 INFO  L225             Difference]: With dead ends: 455855
[2021-11-03 04:32:38,311 INFO  L226             Difference]: Without dead ends: 334293
[2021-11-03 04:32:38,394 INFO  L786         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-11-03 04:32:38,644 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 334293 states.
[2021-11-03 04:32:41,870 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 334293 to 334293.
[2021-11-03 04:32:42,121 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 334293 states, 334292 states have (on average 1.2274777739221998) internal successors, (410336), 334292 states have internal predecessors, (410336), 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)
[2021-11-03 04:32:43,511 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 334293 states to 334293 states and 410336 transitions.
[2021-11-03 04:32:43,519 INFO  L78                 Accepts]: Start accepts. Automaton has 334293 states and 410336 transitions. Word has length 13001
[2021-11-03 04:32:43,521 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-03 04:32:43,521 INFO  L470      AbstractCegarLoop]: Abstraction has 334293 states and 410336 transitions.
[2021-11-03 04:32:43,524 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3250.25) internal successors, (13001), 3 states have internal predecessors, (13001), 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)
[2021-11-03 04:32:43,524 INFO  L276                IsEmpty]: Start isEmpty. Operand 334293 states and 410336 transitions.
[2021-11-03 04:32:45,654 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13085
[2021-11-03 04:32:45,655 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-03 04:32:45,659 INFO  L513         BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2021-11-03 04:32:45,660 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2021-11-03 04:32:45,661 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-03 04:32:45,661 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-03 04:32:45,664 INFO  L85        PathProgramCache]: Analyzing trace with hash 760068721, now seen corresponding path program 1 times
[2021-11-03 04:32:45,664 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-03 04:32:45,665 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732051044]
[2021-11-03 04:32:45,667 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-03 04:32:45,667 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-03 04:32:46,908 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-03 04:33:18,368 INFO  L134       CoverageAnalysis]: Checked inductivity of 3091 backedges. 3087 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2021-11-03 04:33:18,371 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-03 04:33:18,377 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732051044]
[2021-11-03 04:33:18,377 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732051044] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-03 04:33:18,378 INFO  L186   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-11-03 04:33:18,381 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-11-03 04:33:18,381 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955305981]
[2021-11-03 04:33:18,390 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-11-03 04:33:18,391 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-03 04:33:18,392 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-11-03 04:33:18,394 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-11-03 04:33:18,398 INFO  L87              Difference]: Start difference. First operand 334293 states and 410336 transitions. Second operand  has 4 states, 4 states have (on average 3270.25) internal successors, (13081), 3 states have internal predecessors, (13081), 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)
[2021-11-03 04:34:27,156 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-03 04:34:27,156 INFO  L93              Difference]: Finished difference Result 1063655 states and 1322761 transitions.
[2021-11-03 04:34:27,157 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2021-11-03 04:34:27,159 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 3270.25) internal successors, (13081), 3 states have internal predecessors, (13081), 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 13084
[2021-11-03 04:34:27,161 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-03 04:34:28,296 INFO  L225             Difference]: With dead ends: 1063655
[2021-11-03 04:34:28,296 INFO  L226             Difference]: Without dead ends: 739493
[2021-11-03 04:34:28,532 INFO  L786         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2021-11-03 04:34:29,743 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 739493 states.
[2021-11-03 04:34:37,870 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 739493 to 739493.
[2021-11-03 04:34:38,446 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 739493 states, 739492 states have (on average 1.1718639282101768) internal successors, (866584), 739492 states have internal predecessors, (866584), 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)
[2021-11-03 04:34:41,790 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 739493 states to 739493 states and 866584 transitions.
[2021-11-03 04:34:41,796 INFO  L78                 Accepts]: Start accepts. Automaton has 739493 states and 866584 transitions. Word has length 13084
[2021-11-03 04:34:41,799 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-03 04:34:41,799 INFO  L470      AbstractCegarLoop]: Abstraction has 739493 states and 866584 transitions.
[2021-11-03 04:34:41,802 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 3270.25) internal successors, (13081), 3 states have internal predecessors, (13081), 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)
[2021-11-03 04:34:41,803 INFO  L276                IsEmpty]: Start isEmpty. Operand 739493 states and 866584 transitions.
[2021-11-03 04:34:45,755 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13168
[2021-11-03 04:34:45,756 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-03 04:34:45,762 INFO  L513         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-03 04:34:45,768 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2021-11-03 04:34:45,768 INFO  L402      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-03 04:34:45,770 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-03 04:34:45,774 INFO  L85        PathProgramCache]: Analyzing trace with hash 1187055560, now seen corresponding path program 1 times
[2021-11-03 04:34:45,774 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-03 04:34:45,781 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952864031]
[2021-11-03 04:34:45,784 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-03 04:34:45,784 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-03 04:34:47,333 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-03 04:35:17,899 INFO  L134       CoverageAnalysis]: Checked inductivity of 3254 backedges. 3068 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked.
[2021-11-03 04:35:17,899 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-03 04:35:17,900 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952864031]
[2021-11-03 04:35:17,900 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952864031] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-03 04:35:17,900 INFO  L186   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-11-03 04:35:17,903 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-11-03 04:35:17,903 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637906822]
[2021-11-03 04:35:17,913 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-03 04:35:17,913 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-03 04:35:17,914 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-03 04:35:17,914 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-03 04:35:17,918 INFO  L87              Difference]: Start difference. First operand 739493 states and 866584 transitions. Second operand  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 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)
[2021-11-03 04:36:11,980 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-03 04:36:11,981 INFO  L93              Difference]: Finished difference Result 2198215 states and 2579477 transitions.
[2021-11-03 04:36:11,981 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-03 04:36:11,983 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 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 13167
[2021-11-03 04:36:11,985 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-03 04:36:14,399 INFO  L225             Difference]: With dead ends: 2198215
[2021-11-03 04:36:14,400 INFO  L226             Difference]: Without dead ends: 1468853
[2021-11-03 04:36:15,645 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
[2021-11-03 04:36:16,930 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1468853 states.
[2021-11-03 04:36:33,312 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468853 to 1468853.
[2021-11-03 04:36:34,957 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1468853 states, 1468852 states have (on average 1.1319193492605109) internal successors, (1662622), 1468852 states have internal predecessors, (1662622), 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)
[2021-11-03 04:36:40,180 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1468853 states to 1468853 states and 1662622 transitions.
[2021-11-03 04:36:40,180 INFO  L78                 Accepts]: Start accepts. Automaton has 1468853 states and 1662622 transitions. Word has length 13167
[2021-11-03 04:36:40,183 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-03 04:36:40,183 INFO  L470      AbstractCegarLoop]: Abstraction has 1468853 states and 1662622 transitions.
[2021-11-03 04:36:40,186 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 4327.333333333333) internal successors, (12982), 2 states have internal predecessors, (12982), 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)
[2021-11-03 04:36:40,186 INFO  L276                IsEmpty]: Start isEmpty. Operand 1468853 states and 1662622 transitions.
[2021-11-03 04:36:44,066 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13395
[2021-11-03 04:36:44,067 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-03 04:36:44,073 INFO  L513         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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[2021-11-03 04:36:44,073 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2021-11-03 04:36:44,074 INFO  L402      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-03 04:36:44,074 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-03 04:36:44,078 INFO  L85        PathProgramCache]: Analyzing trace with hash 1388415305, now seen corresponding path program 1 times
[2021-11-03 04:36:44,078 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-03 04:36:44,079 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123205235]
[2021-11-03 04:36:44,081 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-03 04:36:44,081 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-03 04:36:45,636 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-03 04:37:16,442 INFO  L134       CoverageAnalysis]: Checked inductivity of 3834 backedges. 3422 proven. 0 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked.
[2021-11-03 04:37:16,442 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-03 04:37:16,443 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123205235]
[2021-11-03 04:37:16,443 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123205235] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-03 04:37:16,443 INFO  L186   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-11-03 04:37:16,445 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-11-03 04:37:16,445 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34492220]
[2021-11-03 04:37:16,454 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2021-11-03 04:37:16,454 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-03 04:37:16,455 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2021-11-03 04:37:16,455 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2021-11-03 04:37:16,459 INFO  L87              Difference]: Start difference. First operand 1468853 states and 1662622 transitions. Second operand  has 3 states, 3 states have (on average 4328.0) internal successors, (12984), 2 states have internal predecessors, (12984), 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)
[2021-11-03 04:38:11,797 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-03 04:38:11,797 INFO  L93              Difference]: Finished difference Result 4376165 states and 4956639 transitions.
[2021-11-03 04:38:11,798 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2021-11-03 04:38:11,800 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 4328.0) internal successors, (12984), 2 states have internal predecessors, (12984), 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 13394
[2021-11-03 04:38:11,803 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-03 04:38:17,546 INFO  L225             Difference]: With dead ends: 4376165
[2021-11-03 04:38:17,546 INFO  L226             Difference]: Without dead ends: 2917443
[2021-11-03 04:38:19,758 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
[2021-11-03 04:38:22,127 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2917443 states.
[2021-11-03 04:38:59,152 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917443 to 2917443.
[2021-11-03 04:39:06,658 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2917443 states, 2917442 states have (on average 1.1090612941062752) internal successors, (3235622), 2917442 states have internal predecessors, (3235622), 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)
[2021-11-03 04:39:20,350 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2917443 states to 2917443 states and 3235622 transitions.
[2021-11-03 04:39:20,361 INFO  L78                 Accepts]: Start accepts. Automaton has 2917443 states and 3235622 transitions. Word has length 13394
[2021-11-03 04:39:20,364 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-03 04:39:20,364 INFO  L470      AbstractCegarLoop]: Abstraction has 2917443 states and 3235622 transitions.
[2021-11-03 04:39:20,367 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 4328.0) internal successors, (12984), 2 states have internal predecessors, (12984), 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)
[2021-11-03 04:39:20,367 INFO  L276                IsEmpty]: Start isEmpty. Operand 2917443 states and 3235622 transitions.