./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig9a.c --full-output --architecture 64bit


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


Checking for overflows
Using default analysis
Version 47ea0209
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/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_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig9a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) )

 --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 172ac4fa0310d14c59d9149bc1b8ec1548860e0b827250d611bfd9d710019753
--- Real Ultimate output ---
This is Ultimate 0.2.1-dev-47ea020
[2021-11-07 01:36:24,051 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2021-11-07 01:36:24,054 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2021-11-07 01:36:24,117 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-11-07 01:36:24,117 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-11-07 01:36:24,122 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-11-07 01:36:24,124 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-11-07 01:36:24,128 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2021-11-07 01:36:24,131 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-11-07 01:36:24,136 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-11-07 01:36:24,137 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2021-11-07 01:36:24,139 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-11-07 01:36:24,139 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-11-07 01:36:24,142 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-11-07 01:36:24,144 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-11-07 01:36:24,150 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-11-07 01:36:24,152 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-11-07 01:36:24,153 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-11-07 01:36:24,156 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-11-07 01:36:24,164 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2021-11-07 01:36:24,166 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-11-07 01:36:24,168 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-11-07 01:36:24,171 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2021-11-07 01:36:24,172 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-11-07 01:36:24,181 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-11-07 01:36:24,181 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-11-07 01:36:24,182 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-11-07 01:36:24,184 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-11-07 01:36:24,184 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-11-07 01:36:24,186 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-11-07 01:36:24,186 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-11-07 01:36:24,187 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-11-07 01:36:24,189 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-11-07 01:36:24,191 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2021-11-07 01:36:24,193 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-11-07 01:36:24,193 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2021-11-07 01:36:24,194 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-11-07 01:36:24,194 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-11-07 01:36:24,194 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2021-11-07 01:36:24,195 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2021-11-07 01:36:24,196 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2021-11-07 01:36:24,197 INFO  L101        SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/config/svcomp-Overflow-64bit-Taipan_Default.epf
[2021-11-07 01:36:24,243 INFO  L113        SettingsManager]: Loading preferences was successful
[2021-11-07 01:36:24,244 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2021-11-07 01:36:24,245 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2021-11-07 01:36:24,245 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2021-11-07 01:36:24,246 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2021-11-07 01:36:24,246 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2021-11-07 01:36:24,246 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2021-11-07 01:36:24,246 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2021-11-07 01:36:24,247 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2021-11-07 01:36:24,247 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2021-11-07 01:36:24,251 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2021-11-07 01:36:24,252 INFO  L138        SettingsManager]:  * Interval Domain=false
[2021-11-07 01:36:24,252 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2021-11-07 01:36:24,252 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2021-11-07 01:36:24,253 INFO  L138        SettingsManager]:  * Simplification Technique=SIMPLIFY_QUICK
[2021-11-07 01:36:24,253 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-11-07 01:36:24,254 INFO  L138        SettingsManager]:  * Check unreachability of error function in SV-COMP mode=false
[2021-11-07 01:36:24,254 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2021-11-07 01:36:24,254 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2021-11-07 01:36:24,254 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2021-11-07 01:36:24,255 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-11-07 01:36:24,255 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2021-11-07 01:36:24,255 INFO  L138        SettingsManager]:  * Check absence of signed integer overflows=true
[2021-11-07 01:36:24,255 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2021-11-07 01:36:24,255 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2021-11-07 01:36:24,256 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2021-11-07 01:36:24,256 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-11-07 01:36:24,256 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2021-11-07 01:36:24,256 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-11-07 01:36:24,258 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-11-07 01:36:24,258 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2021-11-07 01:36:24,259 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-11-07 01:36:24,259 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2021-11-07 01:36:24,259 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-11-07 01:36:24,260 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-11-07 01:36:24,260 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2021-11-07 01:36:24,260 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2021-11-07 01:36:24,260 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_19f162b8-e99b-43cb-903a-f7b9b406c27d/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_19f162b8-e99b-43cb-903a-f7b9b406c27d/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 ! overflow) )


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 -> 64bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 172ac4fa0310d14c59d9149bc1b8ec1548860e0b827250d611bfd9d710019753
[2021-11-07 01:36:24,590 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2021-11-07 01:36:24,611 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-11-07 01:36:24,614 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-11-07 01:36:24,615 INFO  L271        PluginConnector]: Initializing CDTParser...
[2021-11-07 01:36:24,616 INFO  L275        PluginConnector]: CDTParser initialized
[2021-11-07 01:36:24,617 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig9a.c
[2021-11-07 01:36:24,684 INFO  L220              CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/data/5eb0a34bb/00e52a6f50ac41a28f921af5caf9c9fe/FLAGfe8ed9cc6
[2021-11-07 01:36:25,170 INFO  L306              CDTParser]: Found 1 translation units.
[2021-11-07 01:36:25,171 INFO  L160              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig9a.c
[2021-11-07 01:36:25,193 INFO  L349              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/data/5eb0a34bb/00e52a6f50ac41a28f921af5caf9c9fe/FLAGfe8ed9cc6
[2021-11-07 01:36:25,568 INFO  L357              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/data/5eb0a34bb/00e52a6f50ac41a28f921af5caf9c9fe
[2021-11-07 01:36:25,570 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-11-07 01:36:25,572 INFO  L131        ToolchainWalker]: Walking toolchain with 6 elements.
[2021-11-07 01:36:25,574 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-11-07 01:36:25,574 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-11-07 01:36:25,577 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2021-11-07 01:36:25,578 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:36:25" (1/1) ...
[2021-11-07 01:36:25,580 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b0c88b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:25, skipping insertion in model container
[2021-11-07 01:36:25,580 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:36:25" (1/1) ...
[2021-11-07 01:36:25,587 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2021-11-07 01:36:25,599 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2021-11-07 01:36:25,793 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-11-07 01:36:25,797 INFO  L203         MainTranslator]: Completed pre-run
[2021-11-07 01:36:25,811 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2021-11-07 01:36:25,824 INFO  L208         MainTranslator]: Completed translation
[2021-11-07 01:36:25,824 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:25 WrapperNode
[2021-11-07 01:36:25,824 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-11-07 01:36:25,826 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-11-07 01:36:25,826 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-11-07 01:36:25,826 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2021-11-07 01:36:25,834 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:25" (1/1) ...
[2021-11-07 01:36:25,839 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:25" (1/1) ...
[2021-11-07 01:36:25,857 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-11-07 01:36:25,858 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-11-07 01:36:25,859 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2021-11-07 01:36:25,859 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2021-11-07 01:36:25,867 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:25" (1/1) ...
[2021-11-07 01:36:25,868 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:25" (1/1) ...
[2021-11-07 01:36:25,869 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:25" (1/1) ...
[2021-11-07 01:36:25,869 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:25" (1/1) ...
[2021-11-07 01:36:25,871 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:25" (1/1) ...
[2021-11-07 01:36:25,875 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:25" (1/1) ...
[2021-11-07 01:36:25,876 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:25" (1/1) ...
[2021-11-07 01:36:25,878 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-11-07 01:36:25,879 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-11-07 01:36:25,879 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2021-11-07 01:36:25,879 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2021-11-07 01:36:25,880 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:25" (1/1) ...
[2021-11-07 01:36:25,888 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-11-07 01:36:25,899 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3
[2021-11-07 01:36:25,913 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2021-11-07 01:36:25,934 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2021-11-07 01:36:25,971 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-11-07 01:36:25,971 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-11-07 01:36:26,226 INFO  L294             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-11-07 01:36:26,227 INFO  L299             CfgBuilder]: Removed 6 assume(true) statements.
[2021-11-07 01:36:26,229 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:36:26 BoogieIcfgContainer
[2021-11-07 01:36:26,230 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-11-07 01:36:26,232 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-11-07 01:36:26,232 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2021-11-07 01:36:26,244 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2021-11-07 01:36:26,244 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:36:25" (1/3) ...
[2021-11-07 01:36:26,245 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1489be18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:36:26, skipping insertion in model container
[2021-11-07 01:36:26,245 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:25" (2/3) ...
[2021-11-07 01:36:26,246 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1489be18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:36:26, skipping insertion in model container
[2021-11-07 01:36:26,246 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:36:26" (3/3) ...
[2021-11-07 01:36:26,247 INFO  L111   eAbstractionObserver]: Analyzing ICFG BrockschmidtCookFuhs-CAV2013-Fig9a.c
[2021-11-07 01:36:26,253 INFO  L204   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-11-07 01:36:26,253 INFO  L163   ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations.
[2021-11-07 01:36:26,355 INFO  L338      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2021-11-07 01:36:26,362 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 01:36:26,362 INFO  L340      AbstractCegarLoop]: Starting to check reachability of 4 error locations.
[2021-11-07 01:36:26,398 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 14 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 13 states have internal predecessors, (16), 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 01:36:26,403 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2021-11-07 01:36:26,403 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-07 01:36:26,404 INFO  L513         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2021-11-07 01:36:26,405 INFO  L402      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] ===
[2021-11-07 01:36:26,416 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-07 01:36:26,416 INFO  L85        PathProgramCache]: Analyzing trace with hash 29685034, now seen corresponding path program 1 times
[2021-11-07 01:36:26,426 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-07 01:36:26,426 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037932039]
[2021-11-07 01:36:26,427 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-07 01:36:26,432 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-07 01:36:26,541 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:36:26,645 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 01:36:26,646 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-07 01:36:26,646 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037932039]
[2021-11-07 01:36:26,647 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037932039] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-07 01:36:26,647 INFO  L186   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-11-07 01:36:26,648 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-11-07 01:36:26,649 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91050820]
[2021-11-07 01:36:26,655 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-11-07 01:36:26,655 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-07 01:36:26,673 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-11-07 01:36:26,675 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2021-11-07 01:36:26,677 INFO  L87              Difference]: Start difference. First operand  has 14 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 13 states have internal predecessors, (16), 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, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 01:36:26,755 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-07 01:36:26,755 INFO  L93              Difference]: Finished difference Result 24 states and 27 transitions.
[2021-11-07 01:36:26,756 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2021-11-07 01:36:26,757 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5
[2021-11-07 01:36:26,758 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-07 01:36:26,766 INFO  L225             Difference]: With dead ends: 24
[2021-11-07 01:36:26,766 INFO  L226             Difference]: Without dead ends: 19
[2021-11-07 01:36:26,770 INFO  L786         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2021-11-07 01:36:26,787 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2021-11-07 01:36:26,799 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14.
[2021-11-07 01:36:26,802 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 14 states, 10 states have (on average 1.6) internal successors, (16), 13 states have internal predecessors, (16), 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 01:36:26,804 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions.
[2021-11-07 01:36:26,805 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 5
[2021-11-07 01:36:26,807 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-07 01:36:26,807 INFO  L470      AbstractCegarLoop]: Abstraction has 14 states and 16 transitions.
[2021-11-07 01:36:26,807 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 01:36:26,808 INFO  L276                IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions.
[2021-11-07 01:36:26,809 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2021-11-07 01:36:26,809 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-07 01:36:26,809 INFO  L513         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2021-11-07 01:36:26,809 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-11-07 01:36:26,810 INFO  L402      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] ===
[2021-11-07 01:36:26,814 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-07 01:36:26,814 INFO  L85        PathProgramCache]: Analyzing trace with hash 29685785, now seen corresponding path program 1 times
[2021-11-07 01:36:26,814 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-07 01:36:26,815 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144476132]
[2021-11-07 01:36:26,815 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-07 01:36:26,816 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-07 01:36:26,838 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:36:26,889 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 01:36:26,890 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-07 01:36:26,890 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144476132]
[2021-11-07 01:36:26,890 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144476132] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-07 01:36:26,891 INFO  L186   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-11-07 01:36:26,891 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2021-11-07 01:36:26,891 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650667727]
[2021-11-07 01:36:26,892 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-11-07 01:36:26,893 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-07 01:36:26,893 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-11-07 01:36:26,894 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2021-11-07 01:36:26,894 INFO  L87              Difference]: Start difference. First operand 14 states and 16 transitions. Second operand  has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 01:36:26,946 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-07 01:36:26,946 INFO  L93              Difference]: Finished difference Result 25 states and 30 transitions.
[2021-11-07 01:36:26,947 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2021-11-07 01:36:26,947 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 5
[2021-11-07 01:36:26,947 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-07 01:36:26,949 INFO  L225             Difference]: With dead ends: 25
[2021-11-07 01:36:26,949 INFO  L226             Difference]: Without dead ends: 13
[2021-11-07 01:36:26,950 INFO  L786         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2021-11-07 01:36:26,950 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2021-11-07 01:36:26,956 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2021-11-07 01:36:26,956 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13 states, 10 states have (on average 1.4) internal successors, (14), 12 states have internal predecessors, (14), 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 01:36:26,957 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions.
[2021-11-07 01:36:26,958 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 5
[2021-11-07 01:36:26,958 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-07 01:36:26,958 INFO  L470      AbstractCegarLoop]: Abstraction has 13 states and 14 transitions.
[2021-11-07 01:36:26,959 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 01:36:26,959 INFO  L276                IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions.
[2021-11-07 01:36:26,959 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2021-11-07 01:36:26,960 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-07 01:36:26,960 INFO  L513         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2021-11-07 01:36:26,961 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-11-07 01:36:26,962 INFO  L402      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] ===
[2021-11-07 01:36:26,972 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-07 01:36:26,972 INFO  L85        PathProgramCache]: Analyzing trace with hash 920236110, now seen corresponding path program 1 times
[2021-11-07 01:36:26,972 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-07 01:36:26,973 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678221759]
[2021-11-07 01:36:26,973 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-07 01:36:26,973 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-07 01:36:26,982 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:36:27,016 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 01:36:27,016 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-07 01:36:27,016 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678221759]
[2021-11-07 01:36:27,017 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678221759] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-07 01:36:27,017 INFO  L186   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-11-07 01:36:27,017 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-11-07 01:36:27,017 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167684160]
[2021-11-07 01:36:27,018 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-11-07 01:36:27,018 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-07 01:36:27,019 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-11-07 01:36:27,019 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2021-11-07 01:36:27,019 INFO  L87              Difference]: Start difference. First operand 13 states and 14 transitions. Second operand  has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 01:36:27,039 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-07 01:36:27,040 INFO  L93              Difference]: Finished difference Result 14 states and 15 transitions.
[2021-11-07 01:36:27,040 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2021-11-07 01:36:27,040 INFO  L78                 Accepts]: Start accepts. Automaton has  has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6
[2021-11-07 01:36:27,040 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-07 01:36:27,041 INFO  L225             Difference]: With dead ends: 14
[2021-11-07 01:36:27,041 INFO  L226             Difference]: Without dead ends: 13
[2021-11-07 01:36:27,041 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
[2021-11-07 01:36:27,042 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2021-11-07 01:36:27,044 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12.
[2021-11-07 01:36:27,045 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 12 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 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 01:36:27,045 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions.
[2021-11-07 01:36:27,045 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 6
[2021-11-07 01:36:27,045 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-07 01:36:27,046 INFO  L470      AbstractCegarLoop]: Abstraction has 12 states and 13 transitions.
[2021-11-07 01:36:27,046 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 01:36:27,046 INFO  L276                IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions.
[2021-11-07 01:36:27,046 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2021-11-07 01:36:27,046 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-07 01:36:27,047 INFO  L513         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1]
[2021-11-07 01:36:27,047 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-11-07 01:36:27,047 INFO  L402      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] ===
[2021-11-07 01:36:27,048 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-07 01:36:27,048 INFO  L85        PathProgramCache]: Analyzing trace with hash -416359600, now seen corresponding path program 1 times
[2021-11-07 01:36:27,048 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-07 01:36:27,048 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66027512]
[2021-11-07 01:36:27,048 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-07 01:36:27,049 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-07 01:36:27,059 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:36:27,111 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-07 01:36:27,111 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-07 01:36:27,111 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66027512]
[2021-11-07 01:36:27,112 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66027512] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-07 01:36:27,112 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145750283]
[2021-11-07 01:36:27,112 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-07 01:36:27,112 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:36:27,113 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3
[2021-11-07 01:36:27,139 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-07 01:36:27,166 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2021-11-07 01:36:27,199 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:36:27,200 INFO  L263         TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core
[2021-11-07 01:36:27,204 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-07 01:36:27,414 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-07 01:36:27,415 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-11-07 01:36:27,464 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-07 01:36:27,465 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145750283] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-07 01:36:27,465 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1540866907]
[2021-11-07 01:36:27,485 INFO  L159        IcfgInterpreter]: Started Sifa with 7 locations of interest
[2021-11-07 01:36:27,485 INFO  L166        IcfgInterpreter]: Building call graph
[2021-11-07 01:36:27,490 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2021-11-07 01:36:27,495 INFO  L176        IcfgInterpreter]: Starting interpretation
[2021-11-07 01:36:27,496 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2021-11-07 01:36:27,526 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:27,535 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33
[2021-11-07 01:36:27,541 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 87.5 percent of original size
[2021-11-07 01:36:27,545 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26
[2021-11-07 01:36:27,548 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:27,551 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:36:27,557 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:27,571 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41
[2021-11-07 01:36:27,589 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:27,593 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24
[2021-11-07 01:36:27,596 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:27,623 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:27,654 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:27,667 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:27,695 INFO  L180        IcfgInterpreter]: Interpretation finished
[2021-11-07 01:36:27,945 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSifa [1540866907] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-07 01:36:27,945 INFO  L186   FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences.
[2021-11-07 01:36:27,945 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5, 5] total 12
[2021-11-07 01:36:27,946 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992189283]
[2021-11-07 01:36:27,947 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2021-11-07 01:36:27,947 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-07 01:36:27,948 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2021-11-07 01:36:27,948 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132
[2021-11-07 01:36:27,948 INFO  L87              Difference]: Start difference. First operand 12 states and 13 transitions. Second operand  has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 01:36:28,045 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-07 01:36:28,045 INFO  L93              Difference]: Finished difference Result 26 states and 28 transitions.
[2021-11-07 01:36:28,045 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2021-11-07 01:36:28,046 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 8
[2021-11-07 01:36:28,046 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-07 01:36:28,047 INFO  L225             Difference]: With dead ends: 26
[2021-11-07 01:36:28,047 INFO  L226             Difference]: Without dead ends: 24
[2021-11-07 01:36:28,049 INFO  L786         BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132
[2021-11-07 01:36:28,050 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24 states.
[2021-11-07 01:36:28,056 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18.
[2021-11-07 01:36:28,056 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 18 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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 01:36:28,056 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions.
[2021-11-07 01:36:28,057 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 8
[2021-11-07 01:36:28,057 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-07 01:36:28,057 INFO  L470      AbstractCegarLoop]: Abstraction has 18 states and 20 transitions.
[2021-11-07 01:36:28,058 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 01:36:28,058 INFO  L276                IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions.
[2021-11-07 01:36:28,058 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2021-11-07 01:36:28,058 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-07 01:36:28,059 INFO  L513         BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1]
[2021-11-07 01:36:28,099 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2021-11-07 01:36:28,283 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:36:28,284 INFO  L402      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] ===
[2021-11-07 01:36:28,284 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-07 01:36:28,285 INFO  L85        PathProgramCache]: Analyzing trace with hash 1868861325, now seen corresponding path program 1 times
[2021-11-07 01:36:28,285 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-07 01:36:28,285 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445215856]
[2021-11-07 01:36:28,285 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-07 01:36:28,285 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-07 01:36:28,299 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:36:28,395 INFO  L134       CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2021-11-07 01:36:28,395 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-07 01:36:28,396 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445215856]
[2021-11-07 01:36:28,396 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445215856] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-07 01:36:28,396 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249611174]
[2021-11-07 01:36:28,396 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-07 01:36:28,397 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:36:28,397 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3
[2021-11-07 01:36:28,398 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-07 01:36:28,419 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2021-11-07 01:36:28,442 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:36:28,444 INFO  L263         TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core
[2021-11-07 01:36:28,445 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-07 01:36:28,551 INFO  L134       CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2021-11-07 01:36:28,552 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-11-07 01:36:28,657 INFO  L134       CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2021-11-07 01:36:28,658 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [249611174] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-07 01:36:28,658 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1627677699]
[2021-11-07 01:36:28,661 INFO  L159        IcfgInterpreter]: Started Sifa with 9 locations of interest
[2021-11-07 01:36:28,661 INFO  L166        IcfgInterpreter]: Building call graph
[2021-11-07 01:36:28,661 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2021-11-07 01:36:28,662 INFO  L176        IcfgInterpreter]: Starting interpretation
[2021-11-07 01:36:28,662 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2021-11-07 01:36:28,674 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:28,679 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33
[2021-11-07 01:36:28,682 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 87.5 percent of original size
[2021-11-07 01:36:28,685 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26
[2021-11-07 01:36:28,688 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:28,690 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:36:28,695 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:28,698 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24
[2021-11-07 01:36:28,701 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:28,704 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24
[2021-11-07 01:36:28,706 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:28,713 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:28,720 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:28,725 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:28,738 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:28,744 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110
[2021-11-07 01:36:28,747 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:28,761 INFO  L185       QuantifierPusher]: treesize reduction 32, result has 45.8 percent of original size 27
[2021-11-07 01:36:28,765 INFO  L180       QuantifierPusher]: treesize reduction 32, result has 59.5 percent of original size
[2021-11-07 01:36:28,768 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44
[2021-11-07 01:36:28,771 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:28,779 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:28,791 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:28,807 INFO  L180       QuantifierPusher]: treesize reduction 24, result has 81.5 percent of original size
[2021-11-07 01:36:28,823 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111
[2021-11-07 01:36:28,835 INFO  L180       QuantifierPusher]: treesize reduction 24, result has 81.5 percent of original size
[2021-11-07 01:36:28,845 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111
[2021-11-07 01:36:28,850 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:28,867 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:28,868 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:28,869 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:28,881 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:28,882 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:28,888 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:28,914 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:28,915 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:28,916 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:28,929 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:28,932 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 86.1 percent of original size
[2021-11-07 01:36:28,936 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25
[2021-11-07 01:36:28,940 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:28,942 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25
[2021-11-07 01:36:28,947 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:28,950 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42
[2021-11-07 01:36:28,953 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:28,958 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:28,965 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:28,977 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:28,985 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92
[2021-11-07 01:36:28,991 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,005 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,015 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,018 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:29,023 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:29,028 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:29,035 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:29,036 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,040 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,047 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,050 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,059 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,065 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,068 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,070 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,074 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,077 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size
[2021-11-07 01:36:29,080 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22
[2021-11-07 01:36:29,082 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:29,086 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25
[2021-11-07 01:36:29,088 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:29,092 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.8 percent of original size 25
[2021-11-07 01:36:29,094 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,102 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,108 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,119 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:29,128 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83
[2021-11-07 01:36:29,132 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,152 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,156 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,160 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:29,162 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:29,167 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:29,169 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:29,170 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,175 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,179 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,182 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,192 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size
[2021-11-07 01:36:29,194 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22
[2021-11-07 01:36:29,195 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,197 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,201 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,204 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,212 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,214 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,217 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,220 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,229 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:29,236 WARN  L197       QuantifierPusher]: Ignoring assumption.
[2021-11-07 01:36:29,242 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:29,249 WARN  L197       QuantifierPusher]: Ignoring assumption.
[2021-11-07 01:36:29,250 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:29,255 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38
[2021-11-07 01:36:29,261 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103
[2021-11-07 01:36:29,263 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110
[2021-11-07 01:36:29,266 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,285 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,286 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,287 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,288 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,289 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,291 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,292 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,297 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:29,301 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127
[2021-11-07 01:36:29,303 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,314 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,315 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,315 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,319 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,322 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:29,324 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:36:29,327 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:29,329 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:36:29,330 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,338 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,339 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,340 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,340 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,343 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,344 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,345 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,348 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,351 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,354 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,361 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,368 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,369 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,371 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,374 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,377 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,388 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,389 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,390 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,390 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,391 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,392 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,393 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:29,395 INFO  L180        IcfgInterpreter]: Interpretation finished
[2021-11-07 01:36:29,677 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-07 01:36:29,677 INFO  L186   FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences.
[2021-11-07 01:36:29,677 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14
[2021-11-07 01:36:29,677 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438460165]
[2021-11-07 01:36:29,678 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2021-11-07 01:36:29,678 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-07 01:36:29,678 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2021-11-07 01:36:29,679 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462
[2021-11-07 01:36:29,679 INFO  L87              Difference]: Start difference. First operand 18 states and 20 transitions. Second operand  has 15 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 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 01:36:30,345 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-07 01:36:30,345 INFO  L93              Difference]: Finished difference Result 79 states and 97 transitions.
[2021-11-07 01:36:30,346 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. 
[2021-11-07 01:36:30,346 INFO  L78                 Accepts]: Start accepts. Automaton has  has 15 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 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 15
[2021-11-07 01:36:30,346 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-07 01:36:30,347 INFO  L225             Difference]: With dead ends: 79
[2021-11-07 01:36:30,347 INFO  L226             Difference]: Without dead ends: 77
[2021-11-07 01:36:30,348 INFO  L786         BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=468, Invalid=1884, Unknown=0, NotChecked=0, Total=2352
[2021-11-07 01:36:30,349 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 77 states.
[2021-11-07 01:36:30,358 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54.
[2021-11-07 01:36:30,358 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 54 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 53 states have internal predecessors, (66), 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 01:36:30,360 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions.
[2021-11-07 01:36:30,360 INFO  L78                 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 15
[2021-11-07 01:36:30,360 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-07 01:36:30,360 INFO  L470      AbstractCegarLoop]: Abstraction has 54 states and 66 transitions.
[2021-11-07 01:36:30,360 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 15 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 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 01:36:30,361 INFO  L276                IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions.
[2021-11-07 01:36:30,361 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2021-11-07 01:36:30,361 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-07 01:36:30,361 INFO  L513         BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1]
[2021-11-07 01:36:30,398 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2021-11-07 01:36:30,581 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:36:30,581 INFO  L402      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] ===
[2021-11-07 01:36:30,582 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-07 01:36:30,582 INFO  L85        PathProgramCache]: Analyzing trace with hash 1959886733, now seen corresponding path program 2 times
[2021-11-07 01:36:30,582 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-07 01:36:30,582 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386739430]
[2021-11-07 01:36:30,582 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-07 01:36:30,582 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-07 01:36:30,595 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:36:30,645 INFO  L134       CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2021-11-07 01:36:30,645 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-07 01:36:30,646 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386739430]
[2021-11-07 01:36:30,646 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386739430] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-07 01:36:30,646 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558953421]
[2021-11-07 01:36:30,646 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2021-11-07 01:36:30,646 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:36:30,647 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3
[2021-11-07 01:36:30,660 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-07 01:36:30,661 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2021-11-07 01:36:30,717 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2021-11-07 01:36:30,718 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2021-11-07 01:36:30,718 INFO  L263         TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core
[2021-11-07 01:36:30,720 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-07 01:36:30,979 INFO  L134       CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2021-11-07 01:36:30,979 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-11-07 01:36:31,093 INFO  L134       CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2021-11-07 01:36:31,094 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558953421] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-07 01:36:31,096 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [920654728]
[2021-11-07 01:36:31,099 INFO  L159        IcfgInterpreter]: Started Sifa with 9 locations of interest
[2021-11-07 01:36:31,099 INFO  L166        IcfgInterpreter]: Building call graph
[2021-11-07 01:36:31,099 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2021-11-07 01:36:31,100 INFO  L176        IcfgInterpreter]: Starting interpretation
[2021-11-07 01:36:31,100 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2021-11-07 01:36:31,117 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,120 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33
[2021-11-07 01:36:31,123 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 87.5 percent of original size
[2021-11-07 01:36:31,133 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26
[2021-11-07 01:36:31,135 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,137 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:36:31,142 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,144 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24
[2021-11-07 01:36:31,148 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,150 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24
[2021-11-07 01:36:31,151 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,154 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,157 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,160 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,169 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,174 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110
[2021-11-07 01:36:31,177 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,189 INFO  L185       QuantifierPusher]: treesize reduction 32, result has 45.8 percent of original size 27
[2021-11-07 01:36:31,195 INFO  L180       QuantifierPusher]: treesize reduction 32, result has 59.5 percent of original size
[2021-11-07 01:36:31,198 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44
[2021-11-07 01:36:31,202 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,210 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,215 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,234 INFO  L180       QuantifierPusher]: treesize reduction 24, result has 81.5 percent of original size
[2021-11-07 01:36:31,238 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111
[2021-11-07 01:36:31,246 INFO  L180       QuantifierPusher]: treesize reduction 24, result has 81.5 percent of original size
[2021-11-07 01:36:31,250 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 111
[2021-11-07 01:36:31,251 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,259 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,260 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,261 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,264 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,265 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,268 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,275 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,277 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,277 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,281 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,285 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 86.1 percent of original size
[2021-11-07 01:36:31,286 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25
[2021-11-07 01:36:31,288 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,290 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25
[2021-11-07 01:36:31,293 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,295 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42
[2021-11-07 01:36:31,298 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,301 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,306 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,313 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,317 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92
[2021-11-07 01:36:31,320 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,329 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,332 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,336 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,339 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:31,342 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,344 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:31,345 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,348 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,352 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,354 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,360 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,366 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,369 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,370 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,373 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,376 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size
[2021-11-07 01:36:31,379 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22
[2021-11-07 01:36:31,380 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,382 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25
[2021-11-07 01:36:31,386 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,390 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.8 percent of original size 25
[2021-11-07 01:36:31,393 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,396 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,401 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,408 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,412 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83
[2021-11-07 01:36:31,415 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,425 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,428 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,430 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,432 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:31,435 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,437 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:31,438 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,440 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,443 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,446 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,462 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size
[2021-11-07 01:36:31,464 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22
[2021-11-07 01:36:31,465 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,468 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,471 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,473 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,483 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,485 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,488 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,490 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,495 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,499 WARN  L197       QuantifierPusher]: Ignoring assumption.
[2021-11-07 01:36:31,501 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,503 WARN  L197       QuantifierPusher]: Ignoring assumption.
[2021-11-07 01:36:31,504 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,506 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:36:31,513 WARN  L197       QuantifierPusher]: Ignoring assumption.
[2021-11-07 01:36:31,514 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,518 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:36:31,520 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92
[2021-11-07 01:36:31,522 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99
[2021-11-07 01:36:31,525 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,536 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,541 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,542 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,548 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,551 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110
[2021-11-07 01:36:31,556 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,564 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,565 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,574 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,576 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,580 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:36:31,583 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:31,585 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:36:31,587 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,592 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,595 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,597 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,602 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,609 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,610 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,611 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,613 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,614 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,617 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,624 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,624 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,625 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,628 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,629 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,631 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,641 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,642 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,643 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,643 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,645 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,646 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:31,653 INFO  L180        IcfgInterpreter]: Interpretation finished
[2021-11-07 01:36:31,889 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-07 01:36:31,890 INFO  L186   FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences.
[2021-11-07 01:36:31,890 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16
[2021-11-07 01:36:31,890 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951147872]
[2021-11-07 01:36:31,890 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 16 states
[2021-11-07 01:36:31,890 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-07 01:36:31,891 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2021-11-07 01:36:31,891 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506
[2021-11-07 01:36:31,892 INFO  L87              Difference]: Start difference. First operand 54 states and 66 transitions. Second operand  has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-07 01:36:32,180 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-07 01:36:32,181 INFO  L93              Difference]: Finished difference Result 105 states and 127 transitions.
[2021-11-07 01:36:32,182 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2021-11-07 01:36:32,183 INFO  L78                 Accepts]: Start accepts. Automaton has  has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21
[2021-11-07 01:36:32,183 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-07 01:36:32,184 INFO  L225             Difference]: With dead ends: 105
[2021-11-07 01:36:32,184 INFO  L226             Difference]: Without dead ends: 55
[2021-11-07 01:36:32,185 INFO  L786         BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992
[2021-11-07 01:36:32,185 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 55 states.
[2021-11-07 01:36:32,192 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52.
[2021-11-07 01:36:32,193 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 52 states, 50 states have (on average 1.2) internal successors, (60), 51 states have internal predecessors, (60), 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 01:36:32,194 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions.
[2021-11-07 01:36:32,194 INFO  L78                 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 21
[2021-11-07 01:36:32,194 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-07 01:36:32,195 INFO  L470      AbstractCegarLoop]: Abstraction has 52 states and 60 transitions.
[2021-11-07 01:36:32,195 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-07 01:36:32,195 INFO  L276                IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions.
[2021-11-07 01:36:32,196 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2021-11-07 01:36:32,196 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-07 01:36:32,197 INFO  L513         BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 1, 1, 1]
[2021-11-07 01:36:32,234 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2021-11-07 01:36:32,412 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:36:32,413 INFO  L402      AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] ===
[2021-11-07 01:36:32,413 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-07 01:36:32,413 INFO  L85        PathProgramCache]: Analyzing trace with hash -1182708214, now seen corresponding path program 3 times
[2021-11-07 01:36:32,413 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-07 01:36:32,413 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250615056]
[2021-11-07 01:36:32,414 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-07 01:36:32,414 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-07 01:36:32,437 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:36:32,517 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2021-11-07 01:36:32,517 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-07 01:36:32,518 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250615056]
[2021-11-07 01:36:32,518 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250615056] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-07 01:36:32,518 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675323094]
[2021-11-07 01:36:32,518 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2021-11-07 01:36:32,518 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:36:32,518 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3
[2021-11-07 01:36:32,519 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-07 01:36:32,546 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2021-11-07 01:36:32,608 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2021-11-07 01:36:32,608 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2021-11-07 01:36:32,609 INFO  L263         TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core
[2021-11-07 01:36:32,610 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-07 01:36:32,893 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2021-11-07 01:36:32,893 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-11-07 01:36:33,091 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2021-11-07 01:36:33,091 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675323094] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-07 01:36:33,091 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1569783582]
[2021-11-07 01:36:33,093 INFO  L159        IcfgInterpreter]: Started Sifa with 9 locations of interest
[2021-11-07 01:36:33,093 INFO  L166        IcfgInterpreter]: Building call graph
[2021-11-07 01:36:33,094 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2021-11-07 01:36:33,094 INFO  L176        IcfgInterpreter]: Starting interpretation
[2021-11-07 01:36:33,094 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2021-11-07 01:36:33,100 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:33,104 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33
[2021-11-07 01:36:33,106 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 87.5 percent of original size
[2021-11-07 01:36:33,108 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26
[2021-11-07 01:36:33,110 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:33,112 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:36:33,117 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:33,119 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41
[2021-11-07 01:36:33,121 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:33,128 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41
[2021-11-07 01:36:33,130 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,132 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,137 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,139 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,146 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:33,149 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 120
[2021-11-07 01:36:33,151 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:33,159 INFO  L185       QuantifierPusher]: treesize reduction 24, result has 72.1 percent of original size 62
[2021-11-07 01:36:33,163 INFO  L180       QuantifierPusher]: treesize reduction 24, result has 77.4 percent of original size
[2021-11-07 01:36:33,167 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 88.6 percent of original size 62
[2021-11-07 01:36:33,169 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,177 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,178 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,178 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,179 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,179 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,185 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,188 INFO  L180       QuantifierPusher]: treesize reduction 6, result has 83.8 percent of original size
[2021-11-07 01:36:33,190 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:36:33,192 INFO  L180       QuantifierPusher]: treesize reduction 6, result has 83.8 percent of original size
[2021-11-07 01:36:33,194 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:36:33,194 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,199 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,212 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,214 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,221 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,244 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,245 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,245 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,246 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,246 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,250 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,252 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size
[2021-11-07 01:36:33,254 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22
[2021-11-07 01:36:33,255 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:33,257 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25
[2021-11-07 01:36:33,261 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:33,263 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.8 percent of original size 25
[2021-11-07 01:36:33,266 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,269 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,272 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,286 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:33,290 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83
[2021-11-07 01:36:33,292 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,300 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,302 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,304 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:33,306 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:33,308 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:33,310 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:33,311 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,313 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,315 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,317 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,324 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size
[2021-11-07 01:36:33,326 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22
[2021-11-07 01:36:33,327 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,329 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,331 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,333 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,336 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,338 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,340 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,341 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,348 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:33,356 WARN  L197       QuantifierPusher]: Ignoring assumption.
[2021-11-07 01:36:33,358 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:33,360 WARN  L197       QuantifierPusher]: Ignoring assumption.
[2021-11-07 01:36:33,361 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:33,364 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:36:33,368 WARN  L197       QuantifierPusher]: Ignoring assumption.
[2021-11-07 01:36:33,369 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:33,373 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:36:33,374 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92
[2021-11-07 01:36:33,377 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99
[2021-11-07 01:36:33,381 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,385 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,388 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,389 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,394 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:33,396 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110
[2021-11-07 01:36:33,399 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,405 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,406 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,409 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,410 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:33,411 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:36:33,414 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:33,416 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:36:33,417 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,419 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,422 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,424 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,428 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,432 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,433 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,435 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,436 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,437 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,439 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,445 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,446 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,447 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,448 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,449 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,451 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,452 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,453 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,461 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,465 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,470 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,473 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,474 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,475 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,476 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:33,478 INFO  L180        IcfgInterpreter]: Interpretation finished
[2021-11-07 01:36:33,762 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-07 01:36:33,762 INFO  L186   FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences.
[2021-11-07 01:36:33,762 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25
[2021-11-07 01:36:33,763 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483377811]
[2021-11-07 01:36:33,763 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 25 states
[2021-11-07 01:36:33,763 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-07 01:36:33,763 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants.
[2021-11-07 01:36:33,764 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992
[2021-11-07 01:36:33,764 INFO  L87              Difference]: Start difference. First operand 52 states and 60 transitions. Second operand  has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 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 01:36:34,433 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-07 01:36:34,433 INFO  L93              Difference]: Finished difference Result 152 states and 176 transitions.
[2021-11-07 01:36:34,433 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2021-11-07 01:36:34,434 INFO  L78                 Accepts]: Start accepts. Automaton has  has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 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 25
[2021-11-07 01:36:34,434 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-07 01:36:34,435 INFO  L225             Difference]: With dead ends: 152
[2021-11-07 01:36:34,435 INFO  L226             Difference]: Without dead ends: 127
[2021-11-07 01:36:34,436 INFO  L786         BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=471, Invalid=2079, Unknown=0, NotChecked=0, Total=2550
[2021-11-07 01:36:34,437 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 127 states.
[2021-11-07 01:36:34,451 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 106.
[2021-11-07 01:36:34,452 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 106 states, 104 states have (on average 1.1923076923076923) internal successors, (124), 105 states have internal predecessors, (124), 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 01:36:34,453 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions.
[2021-11-07 01:36:34,453 INFO  L78                 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 25
[2021-11-07 01:36:34,454 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-07 01:36:34,454 INFO  L470      AbstractCegarLoop]: Abstraction has 106 states and 124 transitions.
[2021-11-07 01:36:34,454 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 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 01:36:34,454 INFO  L276                IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions.
[2021-11-07 01:36:34,455 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2021-11-07 01:36:34,455 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-07 01:36:34,456 INFO  L513         BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 1, 1, 1]
[2021-11-07 01:36:34,493 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2021-11-07 01:36:34,683 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:36:34,684 INFO  L402      AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] ===
[2021-11-07 01:36:34,684 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-07 01:36:34,684 INFO  L85        PathProgramCache]: Analyzing trace with hash -1741840246, now seen corresponding path program 4 times
[2021-11-07 01:36:34,684 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-07 01:36:34,684 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180148559]
[2021-11-07 01:36:34,685 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-07 01:36:34,685 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-07 01:36:34,705 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:36:34,804 INFO  L134       CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2021-11-07 01:36:34,804 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-07 01:36:34,804 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180148559]
[2021-11-07 01:36:34,804 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180148559] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-07 01:36:34,805 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662248147]
[2021-11-07 01:36:34,805 INFO  L93    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2021-11-07 01:36:34,805 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:36:34,805 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3
[2021-11-07 01:36:34,806 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-07 01:36:34,825 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2021-11-07 01:36:34,908 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:36:34,909 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core
[2021-11-07 01:36:34,910 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-07 01:36:35,103 INFO  L134       CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2021-11-07 01:36:35,103 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-11-07 01:36:35,308 INFO  L134       CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2021-11-07 01:36:35,309 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662248147] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-07 01:36:35,309 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [780780716]
[2021-11-07 01:36:35,311 INFO  L159        IcfgInterpreter]: Started Sifa with 9 locations of interest
[2021-11-07 01:36:35,311 INFO  L166        IcfgInterpreter]: Building call graph
[2021-11-07 01:36:35,311 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2021-11-07 01:36:35,312 INFO  L176        IcfgInterpreter]: Starting interpretation
[2021-11-07 01:36:35,312 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2021-11-07 01:36:35,317 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:35,320 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33
[2021-11-07 01:36:35,322 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 87.5 percent of original size
[2021-11-07 01:36:35,325 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26
[2021-11-07 01:36:35,327 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:35,329 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:36:35,332 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:35,334 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24
[2021-11-07 01:36:35,336 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:35,337 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41
[2021-11-07 01:36:35,339 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,342 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,345 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,347 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,354 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:35,358 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 120
[2021-11-07 01:36:35,361 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:35,369 INFO  L185       QuantifierPusher]: treesize reduction 24, result has 72.1 percent of original size 62
[2021-11-07 01:36:35,377 INFO  L180       QuantifierPusher]: treesize reduction 24, result has 77.4 percent of original size
[2021-11-07 01:36:35,379 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79
[2021-11-07 01:36:35,381 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,392 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,392 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,393 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,396 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,397 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,399 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,401 INFO  L180       QuantifierPusher]: treesize reduction 6, result has 83.8 percent of original size
[2021-11-07 01:36:35,402 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:36:35,405 INFO  L180       QuantifierPusher]: treesize reduction 6, result has 83.8 percent of original size
[2021-11-07 01:36:35,406 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:36:35,408 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,412 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,416 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,418 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,424 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,432 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,433 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,433 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,434 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,435 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,438 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,441 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size
[2021-11-07 01:36:35,442 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22
[2021-11-07 01:36:35,445 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:35,446 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25
[2021-11-07 01:36:35,448 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:35,449 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.8 percent of original size 25
[2021-11-07 01:36:35,453 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,455 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,458 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,463 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:35,465 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83
[2021-11-07 01:36:35,470 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,476 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,479 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,480 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:35,482 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:35,484 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:35,485 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:35,486 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,488 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,490 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,492 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,499 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size
[2021-11-07 01:36:35,500 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22
[2021-11-07 01:36:35,501 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,502 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,504 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,506 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,509 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,512 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,521 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,522 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,529 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:35,531 WARN  L197       QuantifierPusher]: Ignoring assumption.
[2021-11-07 01:36:35,533 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:35,541 WARN  L197       QuantifierPusher]: Ignoring assumption.
[2021-11-07 01:36:35,543 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:35,544 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:36:35,546 WARN  L197       QuantifierPusher]: Ignoring assumption.
[2021-11-07 01:36:35,548 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:35,550 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:36:35,551 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92
[2021-11-07 01:36:35,553 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99
[2021-11-07 01:36:35,555 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,560 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,563 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,564 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,569 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:35,571 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110
[2021-11-07 01:36:35,573 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,579 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,580 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,582 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,584 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:35,585 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:36:35,587 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:35,588 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:36:35,589 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,594 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,594 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,595 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,596 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,597 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,598 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,600 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,602 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,604 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,609 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,614 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,615 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,616 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,616 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,617 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,618 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,619 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,620 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,627 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,628 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,642 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,643 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,644 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,645 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,646 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:35,647 INFO  L180        IcfgInterpreter]: Interpretation finished
[2021-11-07 01:36:35,918 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-07 01:36:35,918 INFO  L186   FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences.
[2021-11-07 01:36:35,918 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22
[2021-11-07 01:36:35,919 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833955656]
[2021-11-07 01:36:35,919 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 23 states
[2021-11-07 01:36:35,919 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-07 01:36:35,920 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2021-11-07 01:36:35,920 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870
[2021-11-07 01:36:35,921 INFO  L87              Difference]: Start difference. First operand 106 states and 124 transitions. Second operand  has 23 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 23 states have internal predecessors, (69), 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 01:36:37,866 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-07 01:36:37,866 INFO  L93              Difference]: Finished difference Result 289 states and 365 transitions.
[2021-11-07 01:36:37,867 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. 
[2021-11-07 01:36:37,867 INFO  L78                 Accepts]: Start accepts. Automaton has  has 23 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 23 states have internal predecessors, (69), 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 28
[2021-11-07 01:36:37,867 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-07 01:36:37,870 INFO  L225             Difference]: With dead ends: 289
[2021-11-07 01:36:37,870 INFO  L226             Difference]: Without dead ends: 287
[2021-11-07 01:36:37,876 INFO  L786         BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3844 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1969, Invalid=9161, Unknown=0, NotChecked=0, Total=11130
[2021-11-07 01:36:37,877 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 287 states.
[2021-11-07 01:36:37,899 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 200.
[2021-11-07 01:36:37,900 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 200 states, 198 states have (on average 1.207070707070707) internal successors, (239), 199 states have internal predecessors, (239), 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 01:36:37,902 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 239 transitions.
[2021-11-07 01:36:37,902 INFO  L78                 Accepts]: Start accepts. Automaton has 200 states and 239 transitions. Word has length 28
[2021-11-07 01:36:37,902 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-07 01:36:37,903 INFO  L470      AbstractCegarLoop]: Abstraction has 200 states and 239 transitions.
[2021-11-07 01:36:37,903 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 23 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 23 states have internal predecessors, (69), 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 01:36:37,903 INFO  L276                IsEmpty]: Start isEmpty. Operand 200 states and 239 transitions.
[2021-11-07 01:36:37,904 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2021-11-07 01:36:37,905 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-07 01:36:37,905 INFO  L513         BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1]
[2021-11-07 01:36:37,947 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2021-11-07 01:36:38,124 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255
[2021-11-07 01:36:38,124 INFO  L402      AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] ===
[2021-11-07 01:36:38,124 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-07 01:36:38,124 INFO  L85        PathProgramCache]: Analyzing trace with hash -1388882416, now seen corresponding path program 5 times
[2021-11-07 01:36:38,125 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-07 01:36:38,125 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897190565]
[2021-11-07 01:36:38,125 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-07 01:36:38,125 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-07 01:36:38,134 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:36:38,196 INFO  L134       CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2021-11-07 01:36:38,196 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-07 01:36:38,196 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897190565]
[2021-11-07 01:36:38,197 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897190565] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-07 01:36:38,197 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427149221]
[2021-11-07 01:36:38,197 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2021-11-07 01:36:38,197 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:36:38,197 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3
[2021-11-07 01:36:38,202 INFO  L229       MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-07 01:36:38,208 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2021-11-07 01:36:38,332 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s)
[2021-11-07 01:36:38,333 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2021-11-07 01:36:38,333 INFO  L263         TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core
[2021-11-07 01:36:38,335 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-07 01:36:38,476 INFO  L134       CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2021-11-07 01:36:38,476 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-11-07 01:36:38,680 INFO  L134       CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2021-11-07 01:36:38,681 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [427149221] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-07 01:36:38,681 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1887236872]
[2021-11-07 01:36:38,683 INFO  L159        IcfgInterpreter]: Started Sifa with 9 locations of interest
[2021-11-07 01:36:38,683 INFO  L166        IcfgInterpreter]: Building call graph
[2021-11-07 01:36:38,683 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2021-11-07 01:36:38,684 INFO  L176        IcfgInterpreter]: Starting interpretation
[2021-11-07 01:36:38,684 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2021-11-07 01:36:38,688 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:38,690 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33
[2021-11-07 01:36:38,692 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 87.5 percent of original size
[2021-11-07 01:36:38,693 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26
[2021-11-07 01:36:38,695 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:38,696 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:36:38,698 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:38,700 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24
[2021-11-07 01:36:38,702 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:38,703 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24
[2021-11-07 01:36:38,704 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,706 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,709 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,711 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,716 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:38,719 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110
[2021-11-07 01:36:38,721 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:38,726 INFO  L185       QuantifierPusher]: treesize reduction 32, result has 45.8 percent of original size 27
[2021-11-07 01:36:38,729 INFO  L180       QuantifierPusher]: treesize reduction 32, result has 59.5 percent of original size
[2021-11-07 01:36:38,731 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 77.1 percent of original size 27
[2021-11-07 01:36:38,733 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,736 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,740 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,748 INFO  L180       QuantifierPusher]: treesize reduction 32, result has 74.4 percent of original size
[2021-11-07 01:36:38,750 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94
[2021-11-07 01:36:38,755 INFO  L180       QuantifierPusher]: treesize reduction 32, result has 74.4 percent of original size
[2021-11-07 01:36:38,757 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94
[2021-11-07 01:36:38,758 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,763 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,763 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,764 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,765 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,766 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,769 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,774 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,774 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,775 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,776 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,778 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 86.1 percent of original size
[2021-11-07 01:36:38,784 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25
[2021-11-07 01:36:38,785 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:38,786 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25
[2021-11-07 01:36:38,788 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:38,789 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42
[2021-11-07 01:36:38,791 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,794 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,797 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,803 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:38,805 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92
[2021-11-07 01:36:38,807 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,813 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,815 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,817 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:38,818 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:38,820 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:38,826 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:38,827 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,829 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,836 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,838 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,846 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,852 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,852 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,853 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,854 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,856 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size
[2021-11-07 01:36:38,857 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22
[2021-11-07 01:36:38,858 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:38,859 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25
[2021-11-07 01:36:38,861 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:38,862 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.8 percent of original size 25
[2021-11-07 01:36:38,864 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,867 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,871 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,876 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:38,878 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83
[2021-11-07 01:36:38,882 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,888 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,890 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,891 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:38,893 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:38,895 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:38,897 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:38,897 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,899 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,903 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,905 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,918 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size
[2021-11-07 01:36:38,919 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22
[2021-11-07 01:36:38,920 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,922 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,927 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,928 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,934 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,936 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,938 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,943 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,949 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:38,951 WARN  L197       QuantifierPusher]: Ignoring assumption.
[2021-11-07 01:36:38,953 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:38,955 WARN  L197       QuantifierPusher]: Ignoring assumption.
[2021-11-07 01:36:38,956 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:38,958 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:36:38,961 WARN  L197       QuantifierPusher]: Ignoring assumption.
[2021-11-07 01:36:38,962 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:38,963 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:36:38,989 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92
[2021-11-07 01:36:38,991 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99
[2021-11-07 01:36:38,993 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:38,998 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,001 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,003 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,008 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:39,010 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110
[2021-11-07 01:36:39,013 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,019 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,020 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,023 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,025 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:39,026 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:36:39,028 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:39,034 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:36:39,036 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,041 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,043 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,044 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,045 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,046 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,047 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,049 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,052 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,054 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,060 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,069 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,069 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,070 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,071 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,072 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,073 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,075 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,081 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,081 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,082 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,083 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,084 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:39,086 INFO  L180        IcfgInterpreter]: Interpretation finished
[2021-11-07 01:36:39,332 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-07 01:36:39,332 INFO  L186   FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences.
[2021-11-07 01:36:39,332 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20
[2021-11-07 01:36:39,332 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951775082]
[2021-11-07 01:36:39,333 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 21 states
[2021-11-07 01:36:39,333 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-07 01:36:39,333 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2021-11-07 01:36:39,334 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756
[2021-11-07 01:36:39,334 INFO  L87              Difference]: Start difference. First operand 200 states and 239 transitions. Second operand  has 21 states, 20 states have (on average 3.85) internal successors, (77), 21 states have internal predecessors, (77), 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 01:36:40,871 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-07 01:36:40,871 INFO  L93              Difference]: Finished difference Result 1047 states and 1291 transitions.
[2021-11-07 01:36:40,871 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. 
[2021-11-07 01:36:40,872 INFO  L78                 Accepts]: Start accepts. Automaton has  has 21 states, 20 states have (on average 3.85) internal successors, (77), 21 states have internal predecessors, (77), 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 36
[2021-11-07 01:36:40,872 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-07 01:36:40,878 INFO  L225             Difference]: With dead ends: 1047
[2021-11-07 01:36:40,878 INFO  L226             Difference]: Without dead ends: 1045
[2021-11-07 01:36:40,883 INFO  L786         BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3176 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1912, Invalid=7018, Unknown=0, NotChecked=0, Total=8930
[2021-11-07 01:36:40,885 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1045 states.
[2021-11-07 01:36:40,955 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 901.
[2021-11-07 01:36:40,957 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 901 states, 899 states have (on average 1.2013348164627364) internal successors, (1080), 900 states have internal predecessors, (1080), 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 01:36:40,961 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1080 transitions.
[2021-11-07 01:36:40,961 INFO  L78                 Accepts]: Start accepts. Automaton has 901 states and 1080 transitions. Word has length 36
[2021-11-07 01:36:40,962 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-07 01:36:40,962 INFO  L470      AbstractCegarLoop]: Abstraction has 901 states and 1080 transitions.
[2021-11-07 01:36:40,962 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 21 states, 20 states have (on average 3.85) internal successors, (77), 21 states have internal predecessors, (77), 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 01:36:40,962 INFO  L276                IsEmpty]: Start isEmpty. Operand 901 states and 1080 transitions.
[2021-11-07 01:36:40,965 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 49
[2021-11-07 01:36:40,965 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-07 01:36:40,966 INFO  L513         BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 1, 1, 1]
[2021-11-07 01:36:40,998 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2021-11-07 01:36:41,179 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:36:41,180 INFO  L402      AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] ===
[2021-11-07 01:36:41,180 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-07 01:36:41,180 INFO  L85        PathProgramCache]: Analyzing trace with hash -1579347978, now seen corresponding path program 6 times
[2021-11-07 01:36:41,180 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-07 01:36:41,180 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926410460]
[2021-11-07 01:36:41,180 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-07 01:36:41,181 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-07 01:36:41,210 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:36:41,347 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 47 proven. 140 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2021-11-07 01:36:41,347 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-07 01:36:41,347 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926410460]
[2021-11-07 01:36:41,348 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926410460] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-07 01:36:41,348 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885636627]
[2021-11-07 01:36:41,348 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2021-11-07 01:36:41,348 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:36:41,348 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3
[2021-11-07 01:36:41,349 INFO  L229       MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-07 01:36:41,355 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2021-11-07 01:36:41,490 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2021-11-07 01:36:41,490 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2021-11-07 01:36:41,491 INFO  L263         TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core
[2021-11-07 01:36:41,493 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-07 01:36:41,981 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 27 proven. 156 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2021-11-07 01:36:41,981 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-11-07 01:36:42,302 INFO  L134       CoverageAnalysis]: Checked inductivity of 194 backedges. 10 proven. 173 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2021-11-07 01:36:42,303 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [885636627] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-07 01:36:42,303 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [208164179]
[2021-11-07 01:36:42,305 INFO  L159        IcfgInterpreter]: Started Sifa with 9 locations of interest
[2021-11-07 01:36:42,305 INFO  L166        IcfgInterpreter]: Building call graph
[2021-11-07 01:36:42,305 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2021-11-07 01:36:42,305 INFO  L176        IcfgInterpreter]: Starting interpretation
[2021-11-07 01:36:42,305 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2021-11-07 01:36:42,308 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:42,310 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33
[2021-11-07 01:36:42,311 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 87.5 percent of original size
[2021-11-07 01:36:42,312 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26
[2021-11-07 01:36:42,315 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:42,317 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:36:42,319 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:42,320 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24
[2021-11-07 01:36:42,322 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:42,324 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41
[2021-11-07 01:36:42,324 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,326 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,328 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,330 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,335 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:42,337 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 120
[2021-11-07 01:36:42,339 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,362 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,363 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,364 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,366 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:42,367 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:36:42,370 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:42,371 INFO  L185       QuantifierPusher]: treesize reduction 5, result has 82.8 percent of original size 24
[2021-11-07 01:36:42,372 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,374 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,377 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,381 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 94.6 percent of original size
[2021-11-07 01:36:42,383 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88
[2021-11-07 01:36:42,385 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,391 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,391 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,393 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,394 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:42,395 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:42,397 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:42,398 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:42,399 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,400 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,402 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,404 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,408 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:42,410 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95
[2021-11-07 01:36:42,412 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,416 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,416 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,417 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,418 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,420 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:42,421 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:36:42,423 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:42,424 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41
[2021-11-07 01:36:42,426 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,428 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,431 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,435 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:42,437 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105
[2021-11-07 01:36:42,440 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,453 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,454 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,456 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:42,457 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:42,459 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:42,460 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:42,461 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,462 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,464 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,466 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,471 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:42,473 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95
[2021-11-07 01:36:42,476 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:42,477 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:36:42,479 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:42,481 INFO  L185       QuantifierPusher]: treesize reduction 5, result has 82.8 percent of original size 24
[2021-11-07 01:36:42,482 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,484 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,487 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,513 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 94.6 percent of original size
[2021-11-07 01:36:42,515 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88
[2021-11-07 01:36:42,517 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,523 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,523 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,525 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,526 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:42,527 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:42,530 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:42,531 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:42,532 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,534 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,536 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,537 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,541 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,543 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,544 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,546 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,552 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,556 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,558 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,559 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,563 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,564 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,566 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,568 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:42,571 INFO  L180        IcfgInterpreter]: Interpretation finished
[2021-11-07 01:36:43,081 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-07 01:36:43,081 INFO  L186   FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences.
[2021-11-07 01:36:43,082 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 33
[2021-11-07 01:36:43,082 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159317397]
[2021-11-07 01:36:43,082 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 33 states
[2021-11-07 01:36:43,083 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-07 01:36:43,083 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants.
[2021-11-07 01:36:43,084 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1442, Unknown=0, NotChecked=0, Total=1640
[2021-11-07 01:36:43,084 INFO  L87              Difference]: Start difference. First operand 901 states and 1080 transitions. Second operand  has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 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 01:36:45,958 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-07 01:36:45,958 INFO  L93              Difference]: Finished difference Result 2108 states and 2540 transitions.
[2021-11-07 01:36:45,959 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. 
[2021-11-07 01:36:45,959 INFO  L78                 Accepts]: Start accepts. Automaton has  has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 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 48
[2021-11-07 01:36:45,959 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-07 01:36:45,968 INFO  L225             Difference]: With dead ends: 2108
[2021-11-07 01:36:45,968 INFO  L226             Difference]: Without dead ends: 1581
[2021-11-07 01:36:45,975 INFO  L786         BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3548 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2201, Invalid=10231, Unknown=0, NotChecked=0, Total=12432
[2021-11-07 01:36:45,977 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1581 states.
[2021-11-07 01:36:46,091 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1376.
[2021-11-07 01:36:46,094 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1376 states, 1374 states have (on average 1.1819505094614264) internal successors, (1624), 1375 states have internal predecessors, (1624), 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 01:36:46,099 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 1624 transitions.
[2021-11-07 01:36:46,099 INFO  L78                 Accepts]: Start accepts. Automaton has 1376 states and 1624 transitions. Word has length 48
[2021-11-07 01:36:46,099 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-07 01:36:46,100 INFO  L470      AbstractCegarLoop]: Abstraction has 1376 states and 1624 transitions.
[2021-11-07 01:36:46,100 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 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 01:36:46,100 INFO  L276                IsEmpty]: Start isEmpty. Operand 1376 states and 1624 transitions.
[2021-11-07 01:36:46,104 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 67
[2021-11-07 01:36:46,104 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-07 01:36:46,104 INFO  L513         BasicCegarLoop]: trace histogram [16, 15, 15, 5, 4, 4, 4, 1, 1, 1]
[2021-11-07 01:36:46,140 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2021-11-07 01:36:46,331 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:36:46,332 INFO  L402      AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] ===
[2021-11-07 01:36:46,332 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-07 01:36:46,332 INFO  L85        PathProgramCache]: Analyzing trace with hash 1069182442, now seen corresponding path program 7 times
[2021-11-07 01:36:46,332 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-07 01:36:46,333 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828775845]
[2021-11-07 01:36:46,333 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-07 01:36:46,333 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-07 01:36:46,353 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:36:46,476 INFO  L134       CoverageAnalysis]: Checked inductivity of 437 backedges. 231 proven. 136 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked.
[2021-11-07 01:36:46,476 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-07 01:36:46,476 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828775845]
[2021-11-07 01:36:46,476 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828775845] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-07 01:36:46,476 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980709244]
[2021-11-07 01:36:46,476 INFO  L93    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2021-11-07 01:36:46,477 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:36:46,477 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3
[2021-11-07 01:36:46,480 INFO  L229       MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-07 01:36:46,487 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2021-11-07 01:36:46,662 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:36:46,663 INFO  L263         TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjunts are in the unsatisfiable core
[2021-11-07 01:36:46,665 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-07 01:36:47,151 INFO  L134       CoverageAnalysis]: Checked inductivity of 437 backedges. 249 proven. 118 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked.
[2021-11-07 01:36:47,151 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-11-07 01:36:47,390 INFO  L134       CoverageAnalysis]: Checked inductivity of 437 backedges. 236 proven. 131 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked.
[2021-11-07 01:36:47,390 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [980709244] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-07 01:36:47,390 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1710738288]
[2021-11-07 01:36:47,393 INFO  L159        IcfgInterpreter]: Started Sifa with 9 locations of interest
[2021-11-07 01:36:47,393 INFO  L166        IcfgInterpreter]: Building call graph
[2021-11-07 01:36:47,393 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2021-11-07 01:36:47,394 INFO  L176        IcfgInterpreter]: Starting interpretation
[2021-11-07 01:36:47,394 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2021-11-07 01:36:47,397 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:47,400 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33
[2021-11-07 01:36:47,402 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 87.5 percent of original size
[2021-11-07 01:36:47,404 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26
[2021-11-07 01:36:47,405 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:47,407 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:36:47,409 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:47,410 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24
[2021-11-07 01:36:47,412 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:47,414 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24
[2021-11-07 01:36:47,414 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,417 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,420 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,422 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,428 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:47,431 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110
[2021-11-07 01:36:47,434 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,439 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,440 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,440 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,441 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,442 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,444 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:47,445 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:36:47,447 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:47,449 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41
[2021-11-07 01:36:47,451 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,453 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,457 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,462 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:47,465 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105
[2021-11-07 01:36:47,468 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,475 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,477 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,479 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:47,480 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:47,483 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:47,484 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:47,485 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,487 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,490 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,492 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,498 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:47,500 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95
[2021-11-07 01:36:47,503 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,507 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,508 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,508 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,510 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,511 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:47,513 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:36:47,514 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:47,516 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41
[2021-11-07 01:36:47,518 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,520 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,523 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,527 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:47,530 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105
[2021-11-07 01:36:47,532 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,539 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,541 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,542 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:47,543 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:47,545 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:47,547 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:47,547 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,549 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,552 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,555 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,559 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:47,561 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95
[2021-11-07 01:36:47,564 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:47,565 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:36:47,568 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:47,569 INFO  L185       QuantifierPusher]: treesize reduction 5, result has 82.8 percent of original size 24
[2021-11-07 01:36:47,572 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,574 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,576 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,581 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 94.6 percent of original size
[2021-11-07 01:36:47,583 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88
[2021-11-07 01:36:47,586 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,591 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,595 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,598 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,600 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:47,601 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:47,604 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:47,605 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:47,607 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,608 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,611 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,612 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,616 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,617 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,619 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,620 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,625 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,627 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,630 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,633 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,636 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,638 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,640 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,642 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:47,645 INFO  L180        IcfgInterpreter]: Interpretation finished
[2021-11-07 01:36:48,108 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-07 01:36:48,108 INFO  L186   FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences.
[2021-11-07 01:36:48,108 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23
[2021-11-07 01:36:48,109 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679759599]
[2021-11-07 01:36:48,109 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 23 states
[2021-11-07 01:36:48,109 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-07 01:36:48,110 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2021-11-07 01:36:48,110 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930
[2021-11-07 01:36:48,110 INFO  L87              Difference]: Start difference. First operand 1376 states and 1624 transitions. Second operand  has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 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 01:36:48,561 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-07 01:36:48,561 INFO  L93              Difference]: Finished difference Result 1547 states and 1842 transitions.
[2021-11-07 01:36:48,562 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. 
[2021-11-07 01:36:48,562 INFO  L78                 Accepts]: Start accepts. Automaton has  has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 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 66
[2021-11-07 01:36:48,562 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-07 01:36:48,569 INFO  L225             Difference]: With dead ends: 1547
[2021-11-07 01:36:48,569 INFO  L226             Difference]: Without dead ends: 1072
[2021-11-07 01:36:48,571 INFO  L786         BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=279, Invalid=1791, Unknown=0, NotChecked=0, Total=2070
[2021-11-07 01:36:48,573 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1072 states.
[2021-11-07 01:36:48,648 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1068.
[2021-11-07 01:36:48,650 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1068 states, 1066 states have (on average 1.1688555347091933) internal successors, (1246), 1067 states have internal predecessors, (1246), 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 01:36:48,654 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1246 transitions.
[2021-11-07 01:36:48,654 INFO  L78                 Accepts]: Start accepts. Automaton has 1068 states and 1246 transitions. Word has length 66
[2021-11-07 01:36:48,654 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-07 01:36:48,655 INFO  L470      AbstractCegarLoop]: Abstraction has 1068 states and 1246 transitions.
[2021-11-07 01:36:48,655 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 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 01:36:48,655 INFO  L276                IsEmpty]: Start isEmpty. Operand 1068 states and 1246 transitions.
[2021-11-07 01:36:48,656 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 70
[2021-11-07 01:36:48,657 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-07 01:36:48,657 INFO  L513         BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 1, 1, 1]
[2021-11-07 01:36:48,693 INFO  L552       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0
[2021-11-07 01:36:48,875 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:36:48,876 INFO  L402      AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] ===
[2021-11-07 01:36:48,876 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-07 01:36:48,876 INFO  L85        PathProgramCache]: Analyzing trace with hash 1157733802, now seen corresponding path program 8 times
[2021-11-07 01:36:48,876 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-07 01:36:48,876 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063642782]
[2021-11-07 01:36:48,876 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-07 01:36:48,877 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-07 01:36:48,896 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:36:49,019 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 65 proven. 382 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked.
[2021-11-07 01:36:49,019 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-07 01:36:49,019 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063642782]
[2021-11-07 01:36:49,019 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063642782] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-07 01:36:49,020 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631690221]
[2021-11-07 01:36:49,020 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2021-11-07 01:36:49,020 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:36:49,020 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3
[2021-11-07 01:36:49,024 INFO  L229       MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-07 01:36:49,045 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2021-11-07 01:36:49,311 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s)
[2021-11-07 01:36:49,312 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2021-11-07 01:36:49,313 INFO  L263         TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core
[2021-11-07 01:36:49,315 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-07 01:36:49,857 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 248 proven. 162 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked.
[2021-11-07 01:36:49,857 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-11-07 01:36:50,663 INFO  L134       CoverageAnalysis]: Checked inductivity of 488 backedges. 244 proven. 166 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked.
[2021-11-07 01:36:50,663 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631690221] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-07 01:36:50,664 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1367028144]
[2021-11-07 01:36:50,667 INFO  L159        IcfgInterpreter]: Started Sifa with 9 locations of interest
[2021-11-07 01:36:50,667 INFO  L166        IcfgInterpreter]: Building call graph
[2021-11-07 01:36:50,667 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2021-11-07 01:36:50,668 INFO  L176        IcfgInterpreter]: Starting interpretation
[2021-11-07 01:36:50,668 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2021-11-07 01:36:50,676 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:50,678 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33
[2021-11-07 01:36:50,680 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 87.5 percent of original size
[2021-11-07 01:36:50,681 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26
[2021-11-07 01:36:50,682 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:50,683 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:36:50,693 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:50,695 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41
[2021-11-07 01:36:50,697 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:50,698 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24
[2021-11-07 01:36:50,699 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,700 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,704 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,705 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,716 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:50,718 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110
[2021-11-07 01:36:50,720 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,724 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,724 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,725 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,725 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,727 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,728 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:50,730 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:36:50,731 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:50,733 INFO  L185       QuantifierPusher]: treesize reduction 5, result has 82.8 percent of original size 24
[2021-11-07 01:36:50,734 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,737 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,739 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,744 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 94.6 percent of original size
[2021-11-07 01:36:50,746 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88
[2021-11-07 01:36:50,748 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,753 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,754 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,759 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,761 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:50,762 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:50,764 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:50,765 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:50,766 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,767 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,769 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,770 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,775 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:50,777 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95
[2021-11-07 01:36:50,778 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,782 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,782 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,783 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,784 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,785 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:50,787 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:36:50,788 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:50,790 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41
[2021-11-07 01:36:50,791 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,793 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,796 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,800 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:50,802 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105
[2021-11-07 01:36:50,805 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,810 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,812 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,813 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:50,814 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:50,816 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:50,818 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:50,818 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,820 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,821 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,823 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,827 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:50,836 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95
[2021-11-07 01:36:50,839 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:50,840 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:36:50,842 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:50,856 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41
[2021-11-07 01:36:50,858 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,860 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,863 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,867 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:50,869 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105
[2021-11-07 01:36:50,872 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,879 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,881 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,883 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:50,884 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:50,886 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:36:50,887 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:36:50,888 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,890 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,892 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,893 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,896 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,898 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,899 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,901 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,905 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,907 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,909 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,911 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,914 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,915 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,917 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,919 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:36:50,922 INFO  L180        IcfgInterpreter]: Interpretation finished
[2021-11-07 01:36:51,499 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-07 01:36:51,499 INFO  L186   FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences.
[2021-11-07 01:36:51,499 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 43
[2021-11-07 01:36:51,499 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406998812]
[2021-11-07 01:36:51,500 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 43 states
[2021-11-07 01:36:51,500 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-07 01:36:51,501 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants.
[2021-11-07 01:36:51,501 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2276, Unknown=0, NotChecked=0, Total=2550
[2021-11-07 01:36:51,502 INFO  L87              Difference]: Start difference. First operand 1068 states and 1246 transitions. Second operand  has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-07 01:37:02,199 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-07 01:37:02,199 INFO  L93              Difference]: Finished difference Result 3439 states and 4181 transitions.
[2021-11-07 01:37:02,199 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. 
[2021-11-07 01:37:02,200 INFO  L78                 Accepts]: Start accepts. Automaton has  has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69
[2021-11-07 01:37:02,200 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-07 01:37:02,214 INFO  L225             Difference]: With dead ends: 3439
[2021-11-07 01:37:02,215 INFO  L226             Difference]: Without dead ends: 2682
[2021-11-07 01:37:02,225 INFO  L786         BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22633 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=8210, Invalid=52552, Unknown=0, NotChecked=0, Total=60762
[2021-11-07 01:37:02,228 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2682 states.
[2021-11-07 01:37:02,417 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 2171.
[2021-11-07 01:37:02,421 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 2171 states, 2169 states have (on average 1.214384508990318) internal successors, (2634), 2170 states have internal predecessors, (2634), 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 01:37:02,428 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 2634 transitions.
[2021-11-07 01:37:02,428 INFO  L78                 Accepts]: Start accepts. Automaton has 2171 states and 2634 transitions. Word has length 69
[2021-11-07 01:37:02,429 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-07 01:37:02,429 INFO  L470      AbstractCegarLoop]: Abstraction has 2171 states and 2634 transitions.
[2021-11-07 01:37:02,429 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 43 states, 43 states have (on average 3.0930232558139537) internal successors, (133), 43 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-07 01:37:02,429 INFO  L276                IsEmpty]: Start isEmpty. Operand 2171 states and 2634 transitions.
[2021-11-07 01:37:02,431 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 70
[2021-11-07 01:37:02,431 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-07 01:37:02,431 INFO  L513         BasicCegarLoop]: trace histogram [13, 12, 12, 8, 7, 7, 7, 1, 1, 1]
[2021-11-07 01:37:02,471 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0
[2021-11-07 01:37:02,659 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530
[2021-11-07 01:37:02,660 INFO  L402      AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] ===
[2021-11-07 01:37:02,660 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-07 01:37:02,660 INFO  L85        PathProgramCache]: Analyzing trace with hash -1960912223, now seen corresponding path program 9 times
[2021-11-07 01:37:02,660 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-07 01:37:02,660 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541425945]
[2021-11-07 01:37:02,660 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-07 01:37:02,661 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-07 01:37:02,677 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:37:02,796 INFO  L134       CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 390 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2021-11-07 01:37:02,796 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-07 01:37:02,796 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541425945]
[2021-11-07 01:37:02,796 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541425945] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-07 01:37:02,796 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104499100]
[2021-11-07 01:37:02,796 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2021-11-07 01:37:02,797 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:37:02,797 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3
[2021-11-07 01:37:02,797 INFO  L229       MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-07 01:37:02,799 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2021-11-07 01:37:03,101 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2021-11-07 01:37:03,101 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2021-11-07 01:37:03,102 INFO  L263         TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core
[2021-11-07 01:37:03,104 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-07 01:37:03,509 INFO  L134       CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked.
[2021-11-07 01:37:03,509 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-11-07 01:37:03,895 INFO  L134       CoverageAnalysis]: Checked inductivity of 404 backedges. 1 proven. 384 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked.
[2021-11-07 01:37:03,895 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [104499100] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-07 01:37:03,896 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [632876995]
[2021-11-07 01:37:03,899 INFO  L159        IcfgInterpreter]: Started Sifa with 9 locations of interest
[2021-11-07 01:37:03,899 INFO  L166        IcfgInterpreter]: Building call graph
[2021-11-07 01:37:03,900 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2021-11-07 01:37:03,900 INFO  L176        IcfgInterpreter]: Starting interpretation
[2021-11-07 01:37:03,900 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2021-11-07 01:37:03,907 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:03,911 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33
[2021-11-07 01:37:03,912 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 87.5 percent of original size
[2021-11-07 01:37:03,914 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26
[2021-11-07 01:37:03,916 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:03,917 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:37:03,920 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:03,921 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24
[2021-11-07 01:37:03,923 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:03,924 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41
[2021-11-07 01:37:03,924 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:03,926 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:03,929 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:03,930 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:03,934 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:03,936 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 120
[2021-11-07 01:37:03,938 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:03,947 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:03,948 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:03,949 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:03,951 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:03,952 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:37:03,954 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:03,956 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41
[2021-11-07 01:37:03,958 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:03,960 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:03,963 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:03,967 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:03,969 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105
[2021-11-07 01:37:03,971 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:03,980 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:03,982 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:03,984 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:03,985 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:37:03,987 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:03,989 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:37:03,989 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:03,991 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:03,993 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:03,995 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:03,999 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:04,001 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95
[2021-11-07 01:37:04,004 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,007 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,008 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,009 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,011 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,012 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:04,014 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:37:04,017 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:04,018 INFO  L185       QuantifierPusher]: treesize reduction 5, result has 82.8 percent of original size 24
[2021-11-07 01:37:04,020 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,022 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,025 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,030 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 94.6 percent of original size
[2021-11-07 01:37:04,033 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88
[2021-11-07 01:37:04,036 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,039 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,040 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,042 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,043 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:04,045 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:37:04,047 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:04,048 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:37:04,048 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,049 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,053 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,055 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,059 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:04,061 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95
[2021-11-07 01:37:04,064 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:04,070 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:37:04,073 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:04,075 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41
[2021-11-07 01:37:04,076 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,079 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,082 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,085 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:04,087 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105
[2021-11-07 01:37:04,090 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,096 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,098 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,099 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:04,101 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:37:04,103 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:04,104 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:37:04,105 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,106 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,107 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,108 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,110 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,111 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,113 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,114 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,123 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,125 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,127 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,129 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,131 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,132 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,133 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,134 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:04,138 INFO  L180        IcfgInterpreter]: Interpretation finished
[2021-11-07 01:37:04,613 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-07 01:37:04,613 INFO  L186   FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences.
[2021-11-07 01:37:04,614 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33
[2021-11-07 01:37:04,614 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704736657]
[2021-11-07 01:37:04,614 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 34 states
[2021-11-07 01:37:04,614 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-07 01:37:04,615 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants.
[2021-11-07 01:37:04,615 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1468, Unknown=0, NotChecked=0, Total=1722
[2021-11-07 01:37:04,615 INFO  L87              Difference]: Start difference. First operand 2171 states and 2634 transitions. Second operand  has 34 states, 33 states have (on average 4.606060606060606) internal successors, (152), 34 states have internal predecessors, (152), 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 01:37:13,258 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-07 01:37:13,258 INFO  L93              Difference]: Finished difference Result 6317 states and 8106 transitions.
[2021-11-07 01:37:13,259 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 281 states. 
[2021-11-07 01:37:13,259 INFO  L78                 Accepts]: Start accepts. Automaton has  has 34 states, 33 states have (on average 4.606060606060606) internal successors, (152), 34 states have internal predecessors, (152), 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 69
[2021-11-07 01:37:13,260 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-07 01:37:13,292 INFO  L225             Difference]: With dead ends: 6317
[2021-11-07 01:37:13,292 INFO  L226             Difference]: Without dead ends: 6315
[2021-11-07 01:37:13,302 INFO  L786         BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 310 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45449 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=16874, Invalid=80158, Unknown=0, NotChecked=0, Total=97032
[2021-11-07 01:37:13,310 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6315 states.
[2021-11-07 01:37:13,685 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6315 to 3252.
[2021-11-07 01:37:13,692 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 3252 states, 3250 states have (on average 1.192) internal successors, (3874), 3251 states have internal predecessors, (3874), 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 01:37:13,774 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3252 states to 3252 states and 3874 transitions.
[2021-11-07 01:37:13,774 INFO  L78                 Accepts]: Start accepts. Automaton has 3252 states and 3874 transitions. Word has length 69
[2021-11-07 01:37:13,774 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-07 01:37:13,774 INFO  L470      AbstractCegarLoop]: Abstraction has 3252 states and 3874 transitions.
[2021-11-07 01:37:13,775 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 34 states, 33 states have (on average 4.606060606060606) internal successors, (152), 34 states have internal predecessors, (152), 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 01:37:13,775 INFO  L276                IsEmpty]: Start isEmpty. Operand 3252 states and 3874 transitions.
[2021-11-07 01:37:13,777 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 93
[2021-11-07 01:37:13,778 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-07 01:37:13,778 INFO  L513         BasicCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 12, 1, 1, 1]
[2021-11-07 01:37:13,817 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0
[2021-11-07 01:37:13,999 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589
[2021-11-07 01:37:14,000 INFO  L402      AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] ===
[2021-11-07 01:37:14,000 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-07 01:37:14,000 INFO  L85        PathProgramCache]: Analyzing trace with hash 1869179792, now seen corresponding path program 10 times
[2021-11-07 01:37:14,000 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-07 01:37:14,000 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924428596]
[2021-11-07 01:37:14,000 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-07 01:37:14,000 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-07 01:37:14,026 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:37:14,212 INFO  L134       CoverageAnalysis]: Checked inductivity of 704 backedges. 0 proven. 692 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2021-11-07 01:37:14,212 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-07 01:37:14,212 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924428596]
[2021-11-07 01:37:14,213 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924428596] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-07 01:37:14,213 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017779610]
[2021-11-07 01:37:14,213 INFO  L93    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2021-11-07 01:37:14,213 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:37:14,213 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3
[2021-11-07 01:37:14,216 INFO  L229       MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-07 01:37:14,235 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2021-11-07 01:37:14,564 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:37:14,566 INFO  L263         TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core
[2021-11-07 01:37:14,569 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-07 01:37:14,877 INFO  L134       CoverageAnalysis]: Checked inductivity of 704 backedges. 0 proven. 692 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2021-11-07 01:37:14,877 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-11-07 01:37:15,396 INFO  L134       CoverageAnalysis]: Checked inductivity of 704 backedges. 0 proven. 692 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2021-11-07 01:37:15,396 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017779610] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-07 01:37:15,396 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1516269114]
[2021-11-07 01:37:15,398 INFO  L159        IcfgInterpreter]: Started Sifa with 9 locations of interest
[2021-11-07 01:37:15,398 INFO  L166        IcfgInterpreter]: Building call graph
[2021-11-07 01:37:15,398 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2021-11-07 01:37:15,398 INFO  L176        IcfgInterpreter]: Starting interpretation
[2021-11-07 01:37:15,398 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2021-11-07 01:37:15,409 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:15,411 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33
[2021-11-07 01:37:15,414 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 87.5 percent of original size
[2021-11-07 01:37:15,417 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26
[2021-11-07 01:37:15,419 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:15,420 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:37:15,421 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:15,422 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41
[2021-11-07 01:37:15,429 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:15,430 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41
[2021-11-07 01:37:15,431 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,433 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,435 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,436 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,441 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:15,443 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 120
[2021-11-07 01:37:15,445 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,450 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,450 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,452 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,453 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:15,454 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:37:15,456 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:15,458 INFO  L185       QuantifierPusher]: treesize reduction 5, result has 82.8 percent of original size 24
[2021-11-07 01:37:15,459 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,461 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,465 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,469 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 94.6 percent of original size
[2021-11-07 01:37:15,470 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88
[2021-11-07 01:37:15,472 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,476 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,476 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,477 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,478 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:15,479 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:37:15,482 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:15,487 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:37:15,488 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,489 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,490 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,492 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,494 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:15,496 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95
[2021-11-07 01:37:15,497 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,499 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,499 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,502 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,504 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,506 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:15,507 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:37:15,509 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:15,510 INFO  L185       QuantifierPusher]: treesize reduction 5, result has 82.8 percent of original size 24
[2021-11-07 01:37:15,512 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,514 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,516 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,520 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 94.6 percent of original size
[2021-11-07 01:37:15,522 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88
[2021-11-07 01:37:15,525 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,528 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,529 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,531 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,533 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:15,536 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:37:15,538 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:15,539 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:37:15,540 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,541 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,543 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,544 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,548 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:15,549 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95
[2021-11-07 01:37:15,551 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:15,552 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:37:15,554 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:15,555 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41
[2021-11-07 01:37:15,557 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,558 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,560 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,563 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:15,564 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105
[2021-11-07 01:37:15,567 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,570 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,572 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,577 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:15,579 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:37:15,581 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:15,583 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:37:15,584 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,585 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,587 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,589 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,591 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,593 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,595 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,596 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,601 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,603 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,604 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,606 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,609 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,610 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,612 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,613 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:15,616 INFO  L180        IcfgInterpreter]: Interpretation finished
[2021-11-07 01:37:16,028 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-07 01:37:16,028 INFO  L186   FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences.
[2021-11-07 01:37:16,028 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 36
[2021-11-07 01:37:16,028 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317229309]
[2021-11-07 01:37:16,029 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 37 states
[2021-11-07 01:37:16,029 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-07 01:37:16,029 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants.
[2021-11-07 01:37:16,030 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1509, Unknown=0, NotChecked=0, Total=1980
[2021-11-07 01:37:16,030 INFO  L87              Difference]: Start difference. First operand 3252 states and 3874 transitions. Second operand  has 37 states, 36 states have (on average 5.25) internal successors, (189), 37 states have internal predecessors, (189), 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 01:37:22,041 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-07 01:37:22,042 INFO  L93              Difference]: Finished difference Result 14121 states and 17959 transitions.
[2021-11-07 01:37:22,042 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. 
[2021-11-07 01:37:22,042 INFO  L78                 Accepts]: Start accepts. Automaton has  has 37 states, 36 states have (on average 5.25) internal successors, (189), 37 states have internal predecessors, (189), 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 92
[2021-11-07 01:37:22,043 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-07 01:37:22,108 INFO  L225             Difference]: With dead ends: 14121
[2021-11-07 01:37:22,109 INFO  L226             Difference]: Without dead ends: 14119
[2021-11-07 01:37:22,116 INFO  L786         BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24993 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=12757, Invalid=44603, Unknown=0, NotChecked=0, Total=57360
[2021-11-07 01:37:22,133 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14119 states.
[2021-11-07 01:37:23,381 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14119 to 13852.
[2021-11-07 01:37:23,406 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 13852 states, 13850 states have (on average 1.2008664259927797) internal successors, (16632), 13851 states have internal predecessors, (16632), 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 01:37:23,447 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13852 states to 13852 states and 16632 transitions.
[2021-11-07 01:37:23,447 INFO  L78                 Accepts]: Start accepts. Automaton has 13852 states and 16632 transitions. Word has length 92
[2021-11-07 01:37:23,447 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-07 01:37:23,447 INFO  L470      AbstractCegarLoop]: Abstraction has 13852 states and 16632 transitions.
[2021-11-07 01:37:23,448 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 37 states, 36 states have (on average 5.25) internal successors, (189), 37 states have internal predecessors, (189), 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 01:37:23,448 INFO  L276                IsEmpty]: Start isEmpty. Operand 13852 states and 16632 transitions.
[2021-11-07 01:37:23,454 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 126
[2021-11-07 01:37:23,455 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-07 01:37:23,455 INFO  L513         BasicCegarLoop]: trace histogram [21, 20, 20, 16, 15, 15, 15, 1, 1, 1]
[2021-11-07 01:37:23,495 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0
[2021-11-07 01:37:23,683 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable646,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:37:23,684 INFO  L402      AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] ===
[2021-11-07 01:37:23,684 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-07 01:37:23,684 INFO  L85        PathProgramCache]: Analyzing trace with hash -2111474399, now seen corresponding path program 11 times
[2021-11-07 01:37:23,684 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-07 01:37:23,684 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111815359]
[2021-11-07 01:37:23,684 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-07 01:37:23,684 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-07 01:37:23,715 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:37:23,915 INFO  L134       CoverageAnalysis]: Checked inductivity of 1360 backedges. 0 proven. 1338 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked.
[2021-11-07 01:37:23,915 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-07 01:37:23,916 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111815359]
[2021-11-07 01:37:23,916 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111815359] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-07 01:37:23,916 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300555286]
[2021-11-07 01:37:23,916 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2021-11-07 01:37:23,916 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:37:23,916 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3
[2021-11-07 01:37:23,917 INFO  L229       MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-07 01:37:23,917 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2021-11-07 01:37:24,301 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s)
[2021-11-07 01:37:24,301 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2021-11-07 01:37:24,302 INFO  L263         TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core
[2021-11-07 01:37:24,305 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-07 01:37:24,765 INFO  L134       CoverageAnalysis]: Checked inductivity of 1360 backedges. 653 proven. 175 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked.
[2021-11-07 01:37:24,765 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-11-07 01:37:25,525 INFO  L134       CoverageAnalysis]: Checked inductivity of 1360 backedges. 653 proven. 175 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked.
[2021-11-07 01:37:25,526 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [300555286] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-07 01:37:25,526 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1644847621]
[2021-11-07 01:37:25,528 INFO  L159        IcfgInterpreter]: Started Sifa with 9 locations of interest
[2021-11-07 01:37:25,528 INFO  L166        IcfgInterpreter]: Building call graph
[2021-11-07 01:37:25,528 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2021-11-07 01:37:25,528 INFO  L176        IcfgInterpreter]: Starting interpretation
[2021-11-07 01:37:25,529 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2021-11-07 01:37:25,551 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:25,553 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33
[2021-11-07 01:37:25,555 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 87.5 percent of original size
[2021-11-07 01:37:25,557 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26
[2021-11-07 01:37:25,558 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:25,559 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:37:25,562 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:25,568 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41
[2021-11-07 01:37:25,570 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:25,572 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41
[2021-11-07 01:37:25,573 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,575 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,577 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,579 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,584 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:25,586 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 120
[2021-11-07 01:37:25,588 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:25,594 INFO  L185       QuantifierPusher]: treesize reduction 24, result has 72.1 percent of original size 62
[2021-11-07 01:37:25,597 INFO  L180       QuantifierPusher]: treesize reduction 24, result has 77.4 percent of original size
[2021-11-07 01:37:25,599 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 88.6 percent of original size 62
[2021-11-07 01:37:25,601 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,606 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,607 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,608 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,609 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,609 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,610 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,612 INFO  L180       QuantifierPusher]: treesize reduction 6, result has 83.8 percent of original size
[2021-11-07 01:37:25,613 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:37:25,615 INFO  L180       QuantifierPusher]: treesize reduction 6, result has 83.8 percent of original size
[2021-11-07 01:37:25,616 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:37:25,617 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,619 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,622 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,624 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,629 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,635 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,636 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,636 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,637 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,637 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,639 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,641 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size
[2021-11-07 01:37:25,642 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22
[2021-11-07 01:37:25,642 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:25,644 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25
[2021-11-07 01:37:25,645 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:25,647 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.8 percent of original size 25
[2021-11-07 01:37:25,648 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,650 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,653 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,657 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:25,659 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83
[2021-11-07 01:37:25,661 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,665 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,667 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,668 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:25,669 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:37:25,671 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:25,672 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:37:25,673 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,674 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,676 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,678 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,683 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size
[2021-11-07 01:37:25,684 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22
[2021-11-07 01:37:25,685 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,686 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,688 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,689 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,692 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,693 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,695 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,696 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,699 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:25,701 WARN  L197       QuantifierPusher]: Ignoring assumption.
[2021-11-07 01:37:25,702 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:25,704 WARN  L197       QuantifierPusher]: Ignoring assumption.
[2021-11-07 01:37:25,705 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:25,707 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:37:25,708 WARN  L197       QuantifierPusher]: Ignoring assumption.
[2021-11-07 01:37:25,709 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:25,710 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:37:25,711 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92
[2021-11-07 01:37:25,712 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99
[2021-11-07 01:37:25,715 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,718 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,719 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,720 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,722 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:25,724 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110
[2021-11-07 01:37:25,725 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,728 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,729 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,731 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,732 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:25,733 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:37:25,736 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:37:25,736 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:37:25,738 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,741 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,742 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,742 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,744 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,744 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,745 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,747 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,748 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,750 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,754 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,759 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,759 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,760 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,760 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,761 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,763 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,764 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,765 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,770 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,771 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,771 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,772 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,772 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,773 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,774 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:37:25,774 INFO  L180        IcfgInterpreter]: Interpretation finished
[2021-11-07 01:37:26,088 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-07 01:37:26,088 INFO  L186   FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences.
[2021-11-07 01:37:26,088 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 12] total 44
[2021-11-07 01:37:26,088 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532301410]
[2021-11-07 01:37:26,089 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 45 states
[2021-11-07 01:37:26,089 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-07 01:37:26,089 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants.
[2021-11-07 01:37:26,090 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=2270, Unknown=0, NotChecked=0, Total=2652
[2021-11-07 01:37:26,090 INFO  L87              Difference]: Start difference. First operand 13852 states and 16632 transitions. Second operand  has 45 states, 44 states have (on average 4.568181818181818) internal successors, (201), 45 states have internal predecessors, (201), 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 01:38:10,008 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-07 01:38:10,008 INFO  L93              Difference]: Finished difference Result 72043 states and 88046 transitions.
[2021-11-07 01:38:10,008 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 579 states. 
[2021-11-07 01:38:10,008 INFO  L78                 Accepts]: Start accepts. Automaton has  has 45 states, 44 states have (on average 4.568181818181818) internal successors, (201), 45 states have internal predecessors, (201), 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 125
[2021-11-07 01:38:10,009 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-07 01:38:10,190 INFO  L225             Difference]: With dead ends: 72043
[2021-11-07 01:38:10,191 INFO  L226             Difference]: Without dead ends: 72041
[2021-11-07 01:38:10,234 INFO  L786         BasicCegarLoop]: 0 DeclaredPredicates, 989 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 622 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187699 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=62603, Invalid=326149, Unknown=0, NotChecked=0, Total=388752
[2021-11-07 01:38:10,317 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 72041 states.
[2021-11-07 01:38:12,691 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 72041 to 17771.
[2021-11-07 01:38:12,721 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 17771 states, 17769 states have (on average 1.1858292531937644) internal successors, (21071), 17770 states have internal predecessors, (21071), 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 01:38:12,762 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17771 states to 17771 states and 21071 transitions.
[2021-11-07 01:38:12,762 INFO  L78                 Accepts]: Start accepts. Automaton has 17771 states and 21071 transitions. Word has length 125
[2021-11-07 01:38:12,763 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-07 01:38:12,763 INFO  L470      AbstractCegarLoop]: Abstraction has 17771 states and 21071 transitions.
[2021-11-07 01:38:12,764 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 45 states, 44 states have (on average 4.568181818181818) internal successors, (201), 45 states have internal predecessors, (201), 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 01:38:12,764 INFO  L276                IsEmpty]: Start isEmpty. Operand 17771 states and 21071 transitions.
[2021-11-07 01:38:12,807 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 191
[2021-11-07 01:38:12,807 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-07 01:38:12,808 INFO  L513         BasicCegarLoop]: trace histogram [28, 27, 27, 27, 26, 26, 26, 1, 1, 1]
[2021-11-07 01:38:12,847 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0
[2021-11-07 01:38:13,023 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable704,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:38:13,024 INFO  L402      AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] ===
[2021-11-07 01:38:13,024 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-07 01:38:13,024 INFO  L85        PathProgramCache]: Analyzing trace with hash 1522642224, now seen corresponding path program 12 times
[2021-11-07 01:38:13,024 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-07 01:38:13,024 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780128352]
[2021-11-07 01:38:13,024 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-07 01:38:13,024 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-07 01:38:13,073 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:38:13,466 INFO  L134       CoverageAnalysis]: Checked inductivity of 3161 backedges. 0 proven. 3135 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked.
[2021-11-07 01:38:13,467 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-07 01:38:13,467 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780128352]
[2021-11-07 01:38:13,467 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780128352] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-07 01:38:13,467 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951300985]
[2021-11-07 01:38:13,467 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2021-11-07 01:38:13,467 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:38:13,467 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3
[2021-11-07 01:38:13,468 INFO  L229       MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-07 01:38:13,469 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2021-11-07 01:38:13,954 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2021-11-07 01:38:13,954 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2021-11-07 01:38:13,957 INFO  L263         TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 31 conjunts are in the unsatisfiable core
[2021-11-07 01:38:13,960 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-07 01:38:14,477 INFO  L134       CoverageAnalysis]: Checked inductivity of 3161 backedges. 0 proven. 3135 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked.
[2021-11-07 01:38:14,477 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-11-07 01:38:15,905 INFO  L134       CoverageAnalysis]: Checked inductivity of 3161 backedges. 0 proven. 3135 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked.
[2021-11-07 01:38:15,905 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951300985] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-07 01:38:15,905 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [453544510]
[2021-11-07 01:38:15,906 INFO  L159        IcfgInterpreter]: Started Sifa with 9 locations of interest
[2021-11-07 01:38:15,907 INFO  L166        IcfgInterpreter]: Building call graph
[2021-11-07 01:38:15,907 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2021-11-07 01:38:15,907 INFO  L176        IcfgInterpreter]: Starting interpretation
[2021-11-07 01:38:15,907 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2021-11-07 01:38:15,924 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:15,930 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33
[2021-11-07 01:38:15,932 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 87.5 percent of original size
[2021-11-07 01:38:15,933 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26
[2021-11-07 01:38:15,935 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:15,936 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:38:15,938 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:15,939 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24
[2021-11-07 01:38:15,941 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:15,942 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24
[2021-11-07 01:38:15,943 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:15,944 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:15,945 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:15,946 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:15,949 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:15,950 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110
[2021-11-07 01:38:15,951 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:15,955 INFO  L185       QuantifierPusher]: treesize reduction 32, result has 45.8 percent of original size 27
[2021-11-07 01:38:15,956 INFO  L180       QuantifierPusher]: treesize reduction 32, result has 59.5 percent of original size
[2021-11-07 01:38:15,957 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 77.1 percent of original size 27
[2021-11-07 01:38:15,959 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:15,961 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:15,972 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:15,976 INFO  L180       QuantifierPusher]: treesize reduction 32, result has 74.4 percent of original size
[2021-11-07 01:38:15,977 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94
[2021-11-07 01:38:15,980 INFO  L180       QuantifierPusher]: treesize reduction 32, result has 74.4 percent of original size
[2021-11-07 01:38:15,981 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 94
[2021-11-07 01:38:15,982 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:15,984 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:15,984 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:15,985 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:15,986 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:15,986 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:15,988 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:15,991 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:15,992 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:15,992 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:15,996 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:15,997 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 86.1 percent of original size
[2021-11-07 01:38:15,998 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25
[2021-11-07 01:38:16,000 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:16,001 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25
[2021-11-07 01:38:16,003 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:16,004 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42
[2021-11-07 01:38:16,006 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,008 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,010 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,014 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:16,016 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92
[2021-11-07 01:38:16,020 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,025 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,027 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,030 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:16,031 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:38:16,033 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:16,034 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:38:16,034 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,036 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,038 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,039 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,043 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,046 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,047 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,047 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,048 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,049 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size
[2021-11-07 01:38:16,050 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22
[2021-11-07 01:38:16,051 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:16,052 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25
[2021-11-07 01:38:16,053 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:16,054 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42
[2021-11-07 01:38:16,055 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,057 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,059 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,061 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:16,063 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92
[2021-11-07 01:38:16,064 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,069 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,223 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,225 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:16,226 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:38:16,228 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:16,229 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:38:16,230 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,231 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,239 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,240 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,246 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 84.8 percent of original size
[2021-11-07 01:38:16,247 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22
[2021-11-07 01:38:16,247 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,249 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,250 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,251 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,252 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,253 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,254 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,255 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,257 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:16,258 WARN  L197       QuantifierPusher]: Ignoring assumption.
[2021-11-07 01:38:16,259 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:16,272 WARN  L197       QuantifierPusher]: Ignoring assumption.
[2021-11-07 01:38:16,272 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:16,274 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38
[2021-11-07 01:38:16,275 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103
[2021-11-07 01:38:16,275 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110
[2021-11-07 01:38:16,277 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,286 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,286 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,299 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,300 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,300 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,301 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,302 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,303 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:16,304 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127
[2021-11-07 01:38:16,306 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,312 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,313 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,314 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,316 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,317 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:16,318 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:38:16,321 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:16,321 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27
[2021-11-07 01:38:16,322 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,325 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,325 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,325 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,326 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,328 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,329 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,329 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,330 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,331 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,332 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,335 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,338 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,338 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,351 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,353 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,354 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,360 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,361 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,362 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,362 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,363 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,363 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,364 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:16,365 INFO  L180        IcfgInterpreter]: Interpretation finished
[2021-11-07 01:38:16,660 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-07 01:38:16,660 INFO  L186   FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences.
[2021-11-07 01:38:16,660 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 64
[2021-11-07 01:38:16,661 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663919912]
[2021-11-07 01:38:16,661 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 65 states
[2021-11-07 01:38:16,661 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-07 01:38:16,662 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants.
[2021-11-07 01:38:16,663 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1652, Invalid=3460, Unknown=0, NotChecked=0, Total=5112
[2021-11-07 01:38:16,663 INFO  L87              Difference]: Start difference. First operand 17771 states and 21071 transitions. Second operand  has 65 states, 64 states have (on average 6.015625) internal successors, (385), 65 states have internal predecessors, (385), 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 01:38:42,399 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-07 01:38:42,399 INFO  L93              Difference]: Finished difference Result 83805 states and 103269 transitions.
[2021-11-07 01:38:42,399 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 478 states. 
[2021-11-07 01:38:42,400 INFO  L78                 Accepts]: Start accepts. Automaton has  has 65 states, 64 states have (on average 6.015625) internal successors, (385), 65 states have internal predecessors, (385), 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 190
[2021-11-07 01:38:42,400 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-07 01:38:42,540 INFO  L225             Difference]: With dead ends: 83805
[2021-11-07 01:38:42,541 INFO  L226             Difference]: Without dead ends: 83803
[2021-11-07 01:38:42,572 INFO  L786         BasicCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 489 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109638 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=54657, Invalid=185933, Unknown=0, NotChecked=0, Total=240590
[2021-11-07 01:38:42,642 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 83803 states.
[2021-11-07 01:38:51,532 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 83803 to 78480.
[2021-11-07 01:38:51,592 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 78480 states, 78478 states have (on average 1.1910853997298605) internal successors, (93474), 78479 states have internal predecessors, (93474), 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 01:38:51,962 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 78480 states to 78480 states and 93474 transitions.
[2021-11-07 01:38:51,962 INFO  L78                 Accepts]: Start accepts. Automaton has 78480 states and 93474 transitions. Word has length 190
[2021-11-07 01:38:51,962 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-07 01:38:51,962 INFO  L470      AbstractCegarLoop]: Abstraction has 78480 states and 93474 transitions.
[2021-11-07 01:38:51,963 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 65 states, 64 states have (on average 6.015625) internal successors, (385), 65 states have internal predecessors, (385), 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 01:38:51,963 INFO  L276                IsEmpty]: Start isEmpty. Operand 78480 states and 93474 transitions.
[2021-11-07 01:38:51,998 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 216
[2021-11-07 01:38:51,999 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-07 01:38:51,999 INFO  L513         BasicCegarLoop]: trace histogram [39, 38, 38, 25, 24, 24, 24, 1, 1, 1]
[2021-11-07 01:38:52,034 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0
[2021-11-07 01:38:52,215 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable779,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:38:52,216 INFO  L402      AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] ===
[2021-11-07 01:38:52,216 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-07 01:38:52,216 INFO  L85        PathProgramCache]: Analyzing trace with hash 1173423746, now seen corresponding path program 13 times
[2021-11-07 01:38:52,216 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-07 01:38:52,216 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081074714]
[2021-11-07 01:38:52,216 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-07 01:38:52,216 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-07 01:38:52,255 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:38:52,560 INFO  L134       CoverageAnalysis]: Checked inductivity of 4249 backedges. 0 proven. 3597 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked.
[2021-11-07 01:38:52,560 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-07 01:38:52,561 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081074714]
[2021-11-07 01:38:52,561 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081074714] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-07 01:38:52,561 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129381747]
[2021-11-07 01:38:52,561 INFO  L93    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
[2021-11-07 01:38:52,561 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:38:52,561 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3
[2021-11-07 01:38:52,564 INFO  L229       MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-07 01:38:52,573 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2021-11-07 01:38:53,382 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:38:53,384 INFO  L263         TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 30 conjunts are in the unsatisfiable core
[2021-11-07 01:38:53,387 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-07 01:38:54,948 INFO  L134       CoverageAnalysis]: Checked inductivity of 4249 backedges. 2033 proven. 2079 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked.
[2021-11-07 01:38:54,948 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-11-07 01:38:56,057 INFO  L134       CoverageAnalysis]: Checked inductivity of 4249 backedges. 1918 proven. 2194 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked.
[2021-11-07 01:38:56,058 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [129381747] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-07 01:38:56,058 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1471793807]
[2021-11-07 01:38:56,059 INFO  L159        IcfgInterpreter]: Started Sifa with 9 locations of interest
[2021-11-07 01:38:56,060 INFO  L166        IcfgInterpreter]: Building call graph
[2021-11-07 01:38:56,060 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2021-11-07 01:38:56,060 INFO  L176        IcfgInterpreter]: Starting interpretation
[2021-11-07 01:38:56,060 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2021-11-07 01:38:56,067 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:56,068 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33
[2021-11-07 01:38:56,069 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 87.5 percent of original size
[2021-11-07 01:38:56,070 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26
[2021-11-07 01:38:56,072 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:56,073 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:38:56,075 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:56,075 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24
[2021-11-07 01:38:56,078 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:56,078 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24
[2021-11-07 01:38:56,079 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,080 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,081 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,082 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,084 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:56,086 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110
[2021-11-07 01:38:56,089 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,093 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,093 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,094 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,094 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,095 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,096 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:56,097 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:38:56,098 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:56,099 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41
[2021-11-07 01:38:56,100 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,106 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,108 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,110 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:56,122 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105
[2021-11-07 01:38:56,126 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,131 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,140 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,141 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:56,142 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:38:56,143 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:56,144 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:38:56,144 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,145 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,146 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,147 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,149 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:56,151 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95
[2021-11-07 01:38:56,153 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,155 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,155 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,156 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,157 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,158 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:56,159 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:38:56,160 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:56,161 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41
[2021-11-07 01:38:56,162 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,164 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,165 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,167 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:56,169 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105
[2021-11-07 01:38:56,170 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,174 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,175 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,176 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:56,177 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:38:56,178 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:56,179 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:38:56,179 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,180 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,183 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,184 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,189 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:56,192 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95
[2021-11-07 01:38:56,194 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:56,194 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:38:56,196 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:56,198 INFO  L185       QuantifierPusher]: treesize reduction 5, result has 82.8 percent of original size 24
[2021-11-07 01:38:56,199 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,200 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,201 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,204 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 94.6 percent of original size
[2021-11-07 01:38:56,205 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88
[2021-11-07 01:38:56,207 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,224 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,224 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,226 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,227 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:56,228 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:38:56,230 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:38:56,232 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:38:56,233 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,235 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,240 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,241 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,244 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,245 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,247 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,248 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,252 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,254 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,256 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,257 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,260 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,261 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,342 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,343 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:38:56,345 INFO  L180        IcfgInterpreter]: Interpretation finished
[2021-11-07 01:38:56,968 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-07 01:38:56,968 INFO  L186   FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences.
[2021-11-07 01:38:56,968 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31, 31] total 76
[2021-11-07 01:38:56,968 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202094294]
[2021-11-07 01:38:56,969 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 76 states
[2021-11-07 01:38:56,969 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-07 01:38:56,970 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants.
[2021-11-07 01:38:56,970 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=6087, Unknown=0, NotChecked=0, Total=6972
[2021-11-07 01:38:56,970 INFO  L87              Difference]: Start difference. First operand 78480 states and 93474 transitions. Second operand  has 76 states, 76 states have (on average 5.565789473684211) internal successors, (423), 76 states have internal predecessors, (423), 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 01:39:23,734 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-07 01:39:23,734 INFO  L93              Difference]: Finished difference Result 130020 states and 155931 transitions.
[2021-11-07 01:39:23,734 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 434 states. 
[2021-11-07 01:39:23,734 INFO  L78                 Accepts]: Start accepts. Automaton has  has 76 states, 76 states have (on average 5.565789473684211) internal successors, (423), 76 states have internal predecessors, (423), 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 215
[2021-11-07 01:39:23,735 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-07 01:39:23,815 INFO  L225             Difference]: With dead ends: 130020
[2021-11-07 01:39:23,815 INFO  L226             Difference]: Without dead ends: 60033
[2021-11-07 01:39:23,879 INFO  L786         BasicCegarLoop]: 0 DeclaredPredicates, 1097 GetRequests, 585 SyntacticMatches, 1 SemanticMatches, 511 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103031 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=23451, Invalid=239205, Unknown=0, NotChecked=0, Total=262656
[2021-11-07 01:39:23,924 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 60033 states.
[2021-11-07 01:39:29,431 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 60033 to 51313.
[2021-11-07 01:39:29,497 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 51313 states, 51311 states have (on average 1.1651302839547075) internal successors, (59784), 51312 states have internal predecessors, (59784), 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 01:39:29,586 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 51313 states to 51313 states and 59784 transitions.
[2021-11-07 01:39:29,586 INFO  L78                 Accepts]: Start accepts. Automaton has 51313 states and 59784 transitions. Word has length 215
[2021-11-07 01:39:29,587 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2021-11-07 01:39:29,587 INFO  L470      AbstractCegarLoop]: Abstraction has 51313 states and 59784 transitions.
[2021-11-07 01:39:29,587 INFO  L471      AbstractCegarLoop]: INTERPOLANT automaton has  has 76 states, 76 states have (on average 5.565789473684211) internal successors, (423), 76 states have internal predecessors, (423), 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 01:39:29,587 INFO  L276                IsEmpty]: Start isEmpty. Operand 51313 states and 59784 transitions.
[2021-11-07 01:39:29,614 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 248
[2021-11-07 01:39:29,614 INFO  L505         BasicCegarLoop]: Found error trace
[2021-11-07 01:39:29,614 INFO  L513         BasicCegarLoop]: trace histogram [55, 54, 54, 21, 20, 20, 20, 1, 1, 1]
[2021-11-07 01:39:29,654 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0
[2021-11-07 01:39:29,839 WARN  L452      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable868,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:39:29,840 INFO  L402      AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] ===
[2021-11-07 01:39:29,840 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2021-11-07 01:39:29,840 INFO  L85        PathProgramCache]: Analyzing trace with hash 416665410, now seen corresponding path program 14 times
[2021-11-07 01:39:29,840 INFO  L121   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2021-11-07 01:39:29,840 INFO  L332   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053271853]
[2021-11-07 01:39:29,841 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-07 01:39:29,841 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-07 01:39:29,907 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-07 01:39:30,226 INFO  L134       CoverageAnalysis]: Checked inductivity of 6281 backedges. 3092 proven. 1556 refuted. 0 times theorem prover too weak. 1633 trivial. 0 not checked.
[2021-11-07 01:39:30,226 INFO  L139   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2021-11-07 01:39:30,226 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053271853]
[2021-11-07 01:39:30,227 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053271853] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-07 01:39:30,227 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562574778]
[2021-11-07 01:39:30,227 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2021-11-07 01:39:30,227 INFO  L168          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-07 01:39:30,228 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3
[2021-11-07 01:39:30,229 INFO  L229       MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-07 01:39:30,247 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19f162b8-e99b-43cb-903a-f7b9b406c27d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2021-11-07 01:39:31,232 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s)
[2021-11-07 01:39:31,232 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2021-11-07 01:39:31,234 INFO  L263         TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 19 conjunts are in the unsatisfiable core
[2021-11-07 01:39:31,237 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2021-11-07 01:39:32,037 INFO  L134       CoverageAnalysis]: Checked inductivity of 6281 backedges. 3092 proven. 1648 refuted. 0 times theorem prover too weak. 1541 trivial. 0 not checked.
[2021-11-07 01:39:32,037 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2021-11-07 01:39:33,465 INFO  L134       CoverageAnalysis]: Checked inductivity of 6281 backedges. 3092 proven. 1648 refuted. 0 times theorem prover too weak. 1541 trivial. 0 not checked.
[2021-11-07 01:39:33,465 INFO  L160   FreeRefinementEngine]: IpTcStrategyModuleZ3 [562574778] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-07 01:39:33,466 INFO  L332   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [633669009]
[2021-11-07 01:39:33,468 INFO  L159        IcfgInterpreter]: Started Sifa with 9 locations of interest
[2021-11-07 01:39:33,468 INFO  L166        IcfgInterpreter]: Building call graph
[2021-11-07 01:39:33,468 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2021-11-07 01:39:33,468 INFO  L176        IcfgInterpreter]: Starting interpretation
[2021-11-07 01:39:33,468 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2021-11-07 01:39:33,472 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:39:33,474 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33
[2021-11-07 01:39:33,476 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 87.5 percent of original size
[2021-11-07 01:39:33,477 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26
[2021-11-07 01:39:33,478 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:39:33,480 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:39:33,482 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:39:33,483 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24
[2021-11-07 01:39:33,485 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:39:33,486 INFO  L185       QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24
[2021-11-07 01:39:33,486 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,488 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,490 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,491 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,495 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:39:33,497 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 110
[2021-11-07 01:39:33,499 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,501 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,501 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,502 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,502 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,507 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,509 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:39:33,510 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:39:33,512 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:39:33,513 INFO  L185       QuantifierPusher]: treesize reduction 5, result has 82.8 percent of original size 24
[2021-11-07 01:39:33,514 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,516 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,518 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,522 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 94.6 percent of original size
[2021-11-07 01:39:33,524 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88
[2021-11-07 01:39:33,527 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,531 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,532 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,533 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,534 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:39:33,535 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:39:33,537 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:39:33,538 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:39:33,539 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,540 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,542 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,543 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,547 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:39:33,548 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95
[2021-11-07 01:39:33,550 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,554 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,555 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,556 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,558 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,559 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:39:33,560 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:39:33,562 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:39:33,563 INFO  L185       QuantifierPusher]: treesize reduction 5, result has 82.8 percent of original size 24
[2021-11-07 01:39:33,566 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,567 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,568 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,571 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 94.6 percent of original size
[2021-11-07 01:39:33,572 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88
[2021-11-07 01:39:33,574 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,577 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,577 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,578 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,579 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:39:33,582 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:39:33,584 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:39:33,585 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:39:33,586 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,587 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,589 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,590 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,594 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:39:33,595 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95
[2021-11-07 01:39:33,598 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:39:33,600 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24
[2021-11-07 01:39:33,602 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:39:33,603 INFO  L185       QuantifierPusher]: treesize reduction 5, result has 82.8 percent of original size 24
[2021-11-07 01:39:33,605 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,606 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,609 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,612 INFO  L180       QuantifierPusher]: treesize reduction 5, result has 94.6 percent of original size
[2021-11-07 01:39:33,614 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88
[2021-11-07 01:39:33,616 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,632 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,632 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,633 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,634 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:39:33,635 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:39:33,636 INFO  L180       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-11-07 01:39:33,637 INFO  L185       QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32
[2021-11-07 01:39:33,638 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,639 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,641 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,642 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,645 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,647 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,648 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,649 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,654 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,656 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,658 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,659 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,662 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,663 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,665 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,666 INFO  L126          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms
[2021-11-07 01:39:33,669 INFO  L180        IcfgInterpreter]: Interpretation finished
[2021-11-07 01:39:34,320 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-07 01:39:34,320 INFO  L186   FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences.
[2021-11-07 01:39:34,320 INFO  L199   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 49
[2021-11-07 01:39:34,320 INFO  L115   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111547610]
[2021-11-07 01:39:34,321 INFO  L546      AbstractCegarLoop]: INTERPOLANT automaton has 50 states
[2021-11-07 01:39:34,321 INFO  L103   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2021-11-07 01:39:34,323 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants.
[2021-11-07 01:39:34,323 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=2954, Unknown=0, NotChecked=0, Total=3306
[2021-11-07 01:39:34,324 INFO  L87              Difference]: Start difference. First operand 51313 states and 59784 transitions. Second operand  has 50 states, 49 states have (on average 3.673469387755102) internal successors, (180), 50 states have internal predecessors, (180), 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)