./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c --full-output --architecture 32bit
--------------------------------------------------------------------------------
Checking for ERROR reachability
Using default analysis
Version 63182f13
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )
--witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 820aaba80b9c7e4ca2ad4a6a908bac2e6f59545dc6a131cb9fae6306b993a9eb
--- Real Ultimate output ---
This is Ultimate 0.2.1-dev-63182f1
[2021-11-13 18:34:22,927 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-11-13 18:34:22,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2021-11-13 18:34:22,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-11-13 18:34:22,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-11-13 18:34:22,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-11-13 18:34:22,963 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-11-13 18:34:22,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2021-11-13 18:34:22,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-11-13 18:34:22,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-11-13 18:34:22,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2021-11-13 18:34:22,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-11-13 18:34:22,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-11-13 18:34:22,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-11-13 18:34:22,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-11-13 18:34:22,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-11-13 18:34:22,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-11-13 18:34:22,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-11-13 18:34:22,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-11-13 18:34:22,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2021-11-13 18:34:22,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-11-13 18:34:22,988 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-11-13 18:34:22,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2021-11-13 18:34:22,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-11-13 18:34:22,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-11-13 18:34:22,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-11-13 18:34:22,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-11-13 18:34:22,996 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-11-13 18:34:22,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-11-13 18:34:22,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-11-13 18:34:22,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-11-13 18:34:22,999 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-11-13 18:34:23,000 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-11-13 18:34:23,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2021-11-13 18:34:23,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-11-13 18:34:23,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2021-11-13 18:34:23,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-11-13 18:34:23,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-11-13 18:34:23,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2021-11-13 18:34:23,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2021-11-13 18:34:23,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2021-11-13 18:34:23,009 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf
[2021-11-13 18:34:23,043 INFO L113 SettingsManager]: Loading preferences was successful
[2021-11-13 18:34:23,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-11-13 18:34:23,044 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2021-11-13 18:34:23,045 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2021-11-13 18:34:23,052 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2021-11-13 18:34:23,052 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2021-11-13 18:34:23,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2021-11-13 18:34:23,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2021-11-13 18:34:23,054 INFO L138 SettingsManager]: * Use SBE=true
[2021-11-13 18:34:23,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-11-13 18:34:23,055 INFO L138 SettingsManager]: * sizeof long=4
[2021-11-13 18:34:23,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-11-13 18:34:23,055 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-11-13 18:34:23,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-11-13 18:34:23,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-11-13 18:34:23,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-11-13 18:34:23,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-11-13 18:34:23,056 INFO L138 SettingsManager]: * sizeof long double=12
[2021-11-13 18:34:23,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-11-13 18:34:23,057 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-11-13 18:34:23,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-11-13 18:34:23,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-11-13 18:34:23,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2021-11-13 18:34:23,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-11-13 18:34:23,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-11-13 18:34:23,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-11-13 18:34:23,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2021-11-13 18:34:23,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-11-13 18:34:23,059 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2021-11-13 18:34:23,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-11-13 18:34:23,061 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF
[2021-11-13 18:34:23,061 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET
[2021-11-13 18:34:23,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-11-13 18:34:23,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2021-11-13 18:34:23,062 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 820aaba80b9c7e4ca2ad4a6a908bac2e6f59545dc6a131cb9fae6306b993a9eb
[2021-11-13 18:34:23,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-11-13 18:34:23,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-11-13 18:34:23,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-11-13 18:34:23,360 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-11-13 18:34:23,361 INFO L275 PluginConnector]: CDTParser initialized
[2021-11-13 18:34:23,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c
[2021-11-13 18:34:23,456 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/data/5135948e3/1cc5bf70a7ca489395387fbd8551d6c6/FLAGca78461c9
[2021-11-13 18:34:23,903 INFO L306 CDTParser]: Found 1 translation units.
[2021-11-13 18:34:23,904 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c
[2021-11-13 18:34:23,910 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/data/5135948e3/1cc5bf70a7ca489395387fbd8551d6c6/FLAGca78461c9
[2021-11-13 18:34:24,292 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/data/5135948e3/1cc5bf70a7ca489395387fbd8551d6c6
[2021-11-13 18:34:24,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-11-13 18:34:24,296 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements.
[2021-11-13 18:34:24,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-11-13 18:34:24,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-11-13 18:34:24,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-11-13 18:34:24,305 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:34:24" (1/1) ...
[2021-11-13 18:34:24,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ad8cfaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:24, skipping insertion in model container
[2021-11-13 18:34:24,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:34:24" (1/1) ...
[2021-11-13 18:34:24,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-11-13 18:34:24,331 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-11-13 18:34:24,498 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c[588,601]
[2021-11-13 18:34:24,529 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-11-13 18:34:24,545 INFO L203 MainTranslator]: Completed pre-run
[2021-11-13 18:34:24,558 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c[588,601]
[2021-11-13 18:34:24,569 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-11-13 18:34:24,583 INFO L208 MainTranslator]: Completed translation
[2021-11-13 18:34:24,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:24 WrapperNode
[2021-11-13 18:34:24,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-11-13 18:34:24,585 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-11-13 18:34:24,586 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-11-13 18:34:24,586 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized
[2021-11-13 18:34:24,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:24" (1/1) ...
[2021-11-13 18:34:24,616 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:24" (1/1) ...
[2021-11-13 18:34:24,645 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-11-13 18:34:24,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-11-13 18:34:24,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-11-13 18:34:24,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-11-13 18:34:24,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:24" (1/1) ...
[2021-11-13 18:34:24,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:24" (1/1) ...
[2021-11-13 18:34:24,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:24" (1/1) ...
[2021-11-13 18:34:24,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:24" (1/1) ...
[2021-11-13 18:34:24,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:24" (1/1) ...
[2021-11-13 18:34:24,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:24" (1/1) ...
[2021-11-13 18:34:24,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:24" (1/1) ...
[2021-11-13 18:34:24,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-11-13 18:34:24,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-11-13 18:34:24,693 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-11-13 18:34:24,694 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-11-13 18:34:24,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:24" (1/1) ...
[2021-11-13 18:34:24,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-11-13 18:34:24,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:34:24,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2021-11-13 18:34:24,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2021-11-13 18:34:24,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-11-13 18:34:24,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-11-13 18:34:24,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-11-13 18:34:24,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-11-13 18:34:24,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-11-13 18:34:24,782 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-11-13 18:34:24,993 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-11-13 18:34:24,993 INFO L299 CfgBuilder]: Removed 1 assume(true) statements.
[2021-11-13 18:34:24,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:34:24 BoogieIcfgContainer
[2021-11-13 18:34:24,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-11-13 18:34:24,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-11-13 18:34:24,997 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-11-13 18:34:25,001 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-11-13 18:34:25,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:34:24" (1/3) ...
[2021-11-13 18:34:25,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3147c306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:34:25, skipping insertion in model container
[2021-11-13 18:34:25,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:24" (2/3) ...
[2021-11-13 18:34:25,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3147c306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:34:25, skipping insertion in model container
[2021-11-13 18:34:25,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:34:24" (3/3) ...
[2021-11-13 18:34:25,005 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound20.c
[2021-11-13 18:34:25,010 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-11-13 18:34:25,010 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2021-11-13 18:34:25,060 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2021-11-13 18:34:25,068 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR
[2021-11-13 18:34:25,068 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-11-13 18:34:25,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2021-11-13 18:34:25,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2021-11-13 18:34:25,105 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:34:25,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:34:25,107 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:34:25,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:34:25,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1823967074, now seen corresponding path program 1 times
[2021-11-13 18:34:25,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:34:25,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410470251]
[2021-11-13 18:34:25,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:25,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:34:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:34:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-13 18:34:25,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:34:25,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410470251]
[2021-11-13 18:34:25,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410470251] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-13 18:34:25,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-13 18:34:25,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2021-11-13 18:34:25,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82528883]
[2021-11-13 18:34:25,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-13 18:34:25,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2021-11-13 18:34:25,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:34:25,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2021-11-13 18:34:25,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2021-11-13 18:34:25,377 INFO L87 Difference]: Start difference. First operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-13 18:34:25,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:34:25,412 INFO L93 Difference]: Finished difference Result 50 states and 87 transitions.
[2021-11-13 18:34:25,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states.
[2021-11-13 18:34:25,414 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7
[2021-11-13 18:34:25,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:34:25,420 INFO L225 Difference]: With dead ends: 50
[2021-11-13 18:34:25,421 INFO L226 Difference]: Without dead ends: 22
[2021-11-13 18:34:25,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2021-11-13 18:34:25,428 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.62ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:34:25,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 1.62ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time]
[2021-11-13 18:34:25,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states.
[2021-11-13 18:34:25,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22.
[2021-11-13 18:34:25,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2021-11-13 18:34:25,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions.
[2021-11-13 18:34:25,469 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7
[2021-11-13 18:34:25,469 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:34:25,470 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions.
[2021-11-13 18:34:25,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-13 18:34:25,470 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions.
[2021-11-13 18:34:25,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2021-11-13 18:34:25,471 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:34:25,471 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:34:25,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-11-13 18:34:25,472 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:34:25,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:34:25,473 INFO L85 PathProgramCache]: Analyzing trace with hash 178926099, now seen corresponding path program 1 times
[2021-11-13 18:34:25,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:34:25,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972587410]
[2021-11-13 18:34:25,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:25,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:34:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:34:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-13 18:34:25,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:34:25,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972587410]
[2021-11-13 18:34:25,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972587410] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-13 18:34:25,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-13 18:34:25,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2021-11-13 18:34:25,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149310047]
[2021-11-13 18:34:25,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-13 18:34:25,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2021-11-13 18:34:25,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:34:25,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2021-11-13 18:34:25,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2021-11-13 18:34:25,554 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-13 18:34:25,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:34:25,578 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions.
[2021-11-13 18:34:25,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2021-11-13 18:34:25,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8
[2021-11-13 18:34:25,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:34:25,580 INFO L225 Difference]: With dead ends: 36
[2021-11-13 18:34:25,581 INFO L226 Difference]: Without dead ends: 24
[2021-11-13 18:34:25,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2021-11-13 18:34:25,583 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.88ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.76ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:34:25,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 8 Unknown, 0 Unchecked, 2.88ms Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 10.76ms Time]
[2021-11-13 18:34:25,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states.
[2021-11-13 18:34:25,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24.
[2021-11-13 18:34:25,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2021-11-13 18:34:25,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions.
[2021-11-13 18:34:25,595 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 8
[2021-11-13 18:34:25,595 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:34:25,595 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions.
[2021-11-13 18:34:25,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-13 18:34:25,596 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions.
[2021-11-13 18:34:25,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2021-11-13 18:34:25,596 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:34:25,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:34:25,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-11-13 18:34:25,597 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:34:25,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:34:25,598 INFO L85 PathProgramCache]: Analyzing trace with hash 180475231, now seen corresponding path program 1 times
[2021-11-13 18:34:25,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:34:25,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432767058]
[2021-11-13 18:34:25,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:25,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:34:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:34:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-13 18:34:25,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:34:25,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432767058]
[2021-11-13 18:34:25,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432767058] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-13 18:34:25,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-13 18:34:25,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2021-11-13 18:34:25,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166437029]
[2021-11-13 18:34:25,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-13 18:34:25,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2021-11-13 18:34:25,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:34:25,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2021-11-13 18:34:25,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2021-11-13 18:34:25,802 INFO L87 Difference]: Start difference. First operand 24 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-13 18:34:25,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:34:25,884 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions.
[2021-11-13 18:34:25,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2021-11-13 18:34:25,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8
[2021-11-13 18:34:25,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:34:25,886 INFO L225 Difference]: With dead ends: 30
[2021-11-13 18:34:25,886 INFO L226 Difference]: Without dead ends: 28
[2021-11-13 18:34:25,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2021-11-13 18:34:25,888 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.85ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.31ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:34:25,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 84 Invalid, 31 Unknown, 0 Unchecked, 2.85ms Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 59.31ms Time]
[2021-11-13 18:34:25,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2021-11-13 18:34:25,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2021-11-13 18:34:25,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2021-11-13 18:34:25,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions.
[2021-11-13 18:34:25,912 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 8
[2021-11-13 18:34:25,912 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:34:25,912 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions.
[2021-11-13 18:34:25,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-13 18:34:25,913 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions.
[2021-11-13 18:34:25,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2021-11-13 18:34:25,913 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:34:25,914 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:34:25,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2021-11-13 18:34:25,914 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:34:25,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:34:25,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1275442234, now seen corresponding path program 1 times
[2021-11-13 18:34:25,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:34:25,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747781825]
[2021-11-13 18:34:25,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:25,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:34:25,944 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-13 18:34:25,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78667108]
[2021-11-13 18:34:25,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:25,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:25,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:34:25,949 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:34:25,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2021-11-13 18:34:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:34:26,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core
[2021-11-13 18:34:26,036 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:34:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-13 18:34:26,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2021-11-13 18:34:26,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:34:26,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747781825]
[2021-11-13 18:34:26,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-13 18:34:26,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78667108]
[2021-11-13 18:34:26,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78667108] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-13 18:34:26,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-13 18:34:26,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2021-11-13 18:34:26,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089684740]
[2021-11-13 18:34:26,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-13 18:34:26,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2021-11-13 18:34:26,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:34:26,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2021-11-13 18:34:26,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2021-11-13 18:34:26,183 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2021-11-13 18:34:26,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:34:26,262 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions.
[2021-11-13 18:34:26,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2021-11-13 18:34:26,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13
[2021-11-13 18:34:26,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:34:26,265 INFO L225 Difference]: With dead ends: 46
[2021-11-13 18:34:26,265 INFO L226 Difference]: Without dead ends: 44
[2021-11-13 18:34:26,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2021-11-13 18:34:26,268 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.19ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.28ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:34:26,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 143 Invalid, 32 Unknown, 0 Unchecked, 3.19ms Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 51.28ms Time]
[2021-11-13 18:34:26,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states.
[2021-11-13 18:34:26,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34.
[2021-11-13 18:34:26,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12)
[2021-11-13 18:34:26,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions.
[2021-11-13 18:34:26,299 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 13
[2021-11-13 18:34:26,300 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:34:26,300 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions.
[2021-11-13 18:34:26,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2021-11-13 18:34:26,301 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions.
[2021-11-13 18:34:26,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2021-11-13 18:34:26,302 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:34:26,303 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:34:26,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2021-11-13 18:34:26,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:26,522 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:34:26,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:34:26,522 INFO L85 PathProgramCache]: Analyzing trace with hash 427545983, now seen corresponding path program 1 times
[2021-11-13 18:34:26,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:34:26,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440357831]
[2021-11-13 18:34:26,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:26,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:34:26,536 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-13 18:34:26,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067713660]
[2021-11-13 18:34:26,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:26,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:26,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:34:26,539 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:34:26,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2021-11-13 18:34:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:34:26,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core
[2021-11-13 18:34:26,595 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:34:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2021-11-13 18:34:26,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2021-11-13 18:34:26,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:34:26,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440357831]
[2021-11-13 18:34:26,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-13 18:34:26,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067713660]
[2021-11-13 18:34:26,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067713660] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-13 18:34:26,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-13 18:34:26,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2021-11-13 18:34:26,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693804531]
[2021-11-13 18:34:26,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-13 18:34:26,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2021-11-13 18:34:26,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:34:26,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2021-11-13 18:34:26,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2021-11-13 18:34:26,722 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2021-11-13 18:34:26,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:34:26,781 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions.
[2021-11-13 18:34:26,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2021-11-13 18:34:26,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18
[2021-11-13 18:34:26,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:34:26,783 INFO L225 Difference]: With dead ends: 50
[2021-11-13 18:34:26,783 INFO L226 Difference]: Without dead ends: 48
[2021-11-13 18:34:26,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2021-11-13 18:34:26,785 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.66ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.54ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:34:26,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 143 Invalid, 36 Unknown, 0 Unchecked, 2.66ms Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 37.54ms Time]
[2021-11-13 18:34:26,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states.
[2021-11-13 18:34:26,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44.
[2021-11-13 18:34:26,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17)
[2021-11-13 18:34:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions.
[2021-11-13 18:34:26,798 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 18
[2021-11-13 18:34:26,798 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:34:26,799 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions.
[2021-11-13 18:34:26,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)
[2021-11-13 18:34:26,799 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions.
[2021-11-13 18:34:26,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2021-11-13 18:34:26,800 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:34:26,800 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:34:26,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2021-11-13 18:34:27,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:27,014 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:34:27,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:34:27,014 INFO L85 PathProgramCache]: Analyzing trace with hash 5607206, now seen corresponding path program 1 times
[2021-11-13 18:34:27,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:34:27,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758901025]
[2021-11-13 18:34:27,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:27,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:34:27,027 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-13 18:34:27,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115060022]
[2021-11-13 18:34:27,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:27,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:27,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:34:27,028 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:34:27,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2021-11-13 18:34:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:34:27,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core
[2021-11-13 18:34:27,078 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:34:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2021-11-13 18:34:27,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2021-11-13 18:34:27,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:34:27,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758901025]
[2021-11-13 18:34:27,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-13 18:34:27,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115060022]
[2021-11-13 18:34:27,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115060022] provided 1 perfect and 0 imperfect interpolant sequences
[2021-11-13 18:34:27,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2021-11-13 18:34:27,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2021-11-13 18:34:27,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404476673]
[2021-11-13 18:34:27,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2021-11-13 18:34:27,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2021-11-13 18:34:27,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:34:27,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2021-11-13 18:34:27,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2021-11-13 18:34:27,245 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)
[2021-11-13 18:34:27,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:34:27,361 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions.
[2021-11-13 18:34:27,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2021-11-13 18:34:27,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23
[2021-11-13 18:34:27,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:34:27,363 INFO L225 Difference]: With dead ends: 58
[2021-11-13 18:34:27,364 INFO L226 Difference]: Without dead ends: 46
[2021-11-13 18:34:27,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2021-11-13 18:34:27,365 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.41ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.94ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:34:27,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 141 Invalid, 47 Unknown, 0 Unchecked, 2.41ms Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 95.94ms Time]
[2021-11-13 18:34:27,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states.
[2021-11-13 18:34:27,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46.
[2021-11-13 18:34:27,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15)
[2021-11-13 18:34:27,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions.
[2021-11-13 18:34:27,375 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 23
[2021-11-13 18:34:27,376 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:34:27,376 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions.
[2021-11-13 18:34:27,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)
[2021-11-13 18:34:27,376 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions.
[2021-11-13 18:34:27,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2021-11-13 18:34:27,378 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:34:27,378 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:34:27,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2021-11-13 18:34:27,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2021-11-13 18:34:27,604 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:34:27,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:34:27,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1172224904, now seen corresponding path program 1 times
[2021-11-13 18:34:27,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:34:27,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523290589]
[2021-11-13 18:34:27,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:27,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:34:27,616 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-13 18:34:27,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502454848]
[2021-11-13 18:34:27,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:27,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:27,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:34:27,623 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:34:27,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2021-11-13 18:34:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:34:27,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core
[2021-11-13 18:34:27,696 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:34:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked.
[2021-11-13 18:34:27,830 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:34:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked.
[2021-11-13 18:34:27,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:34:27,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523290589]
[2021-11-13 18:34:27,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-13 18:34:27,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502454848]
[2021-11-13 18:34:27,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502454848] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-13 18:34:27,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2021-11-13 18:34:27,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8
[2021-11-13 18:34:27,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563540281]
[2021-11-13 18:34:27,967 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2021-11-13 18:34:27,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2021-11-13 18:34:27,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:34:27,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2021-11-13 18:34:27,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2021-11-13 18:34:27,970 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12)
[2021-11-13 18:34:28,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:34:28,165 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions.
[2021-11-13 18:34:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2021-11-13 18:34:28,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 41
[2021-11-13 18:34:28,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:34:28,171 INFO L225 Difference]: With dead ends: 116
[2021-11-13 18:34:28,171 INFO L226 Difference]: Without dead ends: 100
[2021-11-13 18:34:28,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110
[2021-11-13 18:34:28,182 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 65 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 104.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.62ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 129.59ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:34:28,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 225 Invalid, 133 Unknown, 0 Unchecked, 8.62ms Time], IncrementalHoareTripleChecker [37 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 129.59ms Time]
[2021-11-13 18:34:28,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states.
[2021-11-13 18:34:28,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96.
[2021-11-13 18:34:28,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 47 states have (on average 1.148936170212766) internal successors, (54), 50 states have internal predecessors, (54), 38 states have call successors, (38), 10 states have call predecessors, (38), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35)
[2021-11-13 18:34:28,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 127 transitions.
[2021-11-13 18:34:28,206 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 127 transitions. Word has length 41
[2021-11-13 18:34:28,207 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:34:28,207 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 127 transitions.
[2021-11-13 18:34:28,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12)
[2021-11-13 18:34:28,207 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 127 transitions.
[2021-11-13 18:34:28,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2021-11-13 18:34:28,209 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:34:28,209 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:34:28,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2021-11-13 18:34:28,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6
[2021-11-13 18:34:28,426 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:34:28,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:34:28,427 INFO L85 PathProgramCache]: Analyzing trace with hash -680109588, now seen corresponding path program 1 times
[2021-11-13 18:34:28,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:34:28,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500114874]
[2021-11-13 18:34:28,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:28,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:34:28,438 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-13 18:34:28,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220224303]
[2021-11-13 18:34:28,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:28,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:28,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:34:28,440 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:34:28,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2021-11-13 18:34:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:34:28,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core
[2021-11-13 18:34:28,508 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:34:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked.
[2021-11-13 18:34:28,698 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:34:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked.
[2021-11-13 18:34:28,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:34:28,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500114874]
[2021-11-13 18:34:28,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-13 18:34:28,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220224303]
[2021-11-13 18:34:28,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220224303] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-13 18:34:28,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2021-11-13 18:34:28,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8
[2021-11-13 18:34:28,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50942213]
[2021-11-13 18:34:28,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2021-11-13 18:34:28,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2021-11-13 18:34:28,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:34:28,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2021-11-13 18:34:28,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2021-11-13 18:34:28,881 INFO L87 Difference]: Start difference. First operand 96 states and 127 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12)
[2021-11-13 18:34:29,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:34:29,405 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions.
[2021-11-13 18:34:29,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2021-11-13 18:34:29,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 41
[2021-11-13 18:34:29,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:34:29,408 INFO L225 Difference]: With dead ends: 114
[2021-11-13 18:34:29,408 INFO L226 Difference]: Without dead ends: 112
[2021-11-13 18:34:29,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110
[2021-11-13 18:34:29,409 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 422.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.16ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 472.10ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:34:29,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 144 Invalid, 162 Unknown, 0 Unchecked, 3.16ms Time], IncrementalHoareTripleChecker [55 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 472.10ms Time]
[2021-11-13 18:34:29,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states.
[2021-11-13 18:34:29,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112.
[2021-11-13 18:34:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 59 states have (on average 1.11864406779661) internal successors, (66), 62 states have internal predecessors, (66), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35)
[2021-11-13 18:34:29,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 139 transitions.
[2021-11-13 18:34:29,436 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 139 transitions. Word has length 41
[2021-11-13 18:34:29,437 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:34:29,437 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 139 transitions.
[2021-11-13 18:34:29,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12)
[2021-11-13 18:34:29,437 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 139 transitions.
[2021-11-13 18:34:29,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2021-11-13 18:34:29,439 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:34:29,439 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:34:29,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2021-11-13 18:34:29,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:29,660 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:34:29,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:34:29,660 INFO L85 PathProgramCache]: Analyzing trace with hash -399462631, now seen corresponding path program 2 times
[2021-11-13 18:34:29,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:34:29,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873129589]
[2021-11-13 18:34:29,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:29,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:34:29,672 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-13 18:34:29,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536726692]
[2021-11-13 18:34:29,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2021-11-13 18:34:29,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:29,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:34:29,673 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:34:29,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2021-11-13 18:34:29,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2021-11-13 18:34:29,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2021-11-13 18:34:29,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core
[2021-11-13 18:34:29,738 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:34:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked.
[2021-11-13 18:34:29,931 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:34:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked.
[2021-11-13 18:34:30,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:34:30,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873129589]
[2021-11-13 18:34:30,060 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-13 18:34:30,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536726692]
[2021-11-13 18:34:30,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536726692] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-13 18:34:30,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2021-11-13 18:34:30,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8
[2021-11-13 18:34:30,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646788646]
[2021-11-13 18:34:30,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2021-11-13 18:34:30,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2021-11-13 18:34:30,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:34:30,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2021-11-13 18:34:30,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2021-11-13 18:34:30,062 INFO L87 Difference]: Start difference. First operand 112 states and 139 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14)
[2021-11-13 18:34:30,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:34:30,178 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions.
[2021-11-13 18:34:30,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2021-11-13 18:34:30,178 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 46
[2021-11-13 18:34:30,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:34:30,180 INFO L225 Difference]: With dead ends: 118
[2021-11-13 18:34:30,180 INFO L226 Difference]: Without dead ends: 116
[2021-11-13 18:34:30,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72
[2021-11-13 18:34:30,181 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.75ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 85.11ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:34:30,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 241 Invalid, 84 Unknown, 0 Unchecked, 3.75ms Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 85.11ms Time]
[2021-11-13 18:34:30,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states.
[2021-11-13 18:34:30,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116.
[2021-11-13 18:34:30,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 65 states have internal predecessors, (69), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35)
[2021-11-13 18:34:30,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 142 transitions.
[2021-11-13 18:34:30,204 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 142 transitions. Word has length 46
[2021-11-13 18:34:30,204 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:34:30,204 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 142 transitions.
[2021-11-13 18:34:30,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14)
[2021-11-13 18:34:30,205 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 142 transitions.
[2021-11-13 18:34:30,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52
[2021-11-13 18:34:30,206 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:34:30,206 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:34:30,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2021-11-13 18:34:30,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:30,432 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:34:30,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:34:30,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1802852916, now seen corresponding path program 3 times
[2021-11-13 18:34:30,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:34:30,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508321678]
[2021-11-13 18:34:30,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:30,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:34:30,442 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-13 18:34:30,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878027979]
[2021-11-13 18:34:30,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2021-11-13 18:34:30,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:30,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:34:30,444 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:34:30,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2021-11-13 18:34:30,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s)
[2021-11-13 18:34:30,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2021-11-13 18:34:30,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core
[2021-11-13 18:34:30,497 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:34:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked.
[2021-11-13 18:34:30,762 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:34:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked.
[2021-11-13 18:34:31,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:34:31,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508321678]
[2021-11-13 18:34:31,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-13 18:34:31,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878027979]
[2021-11-13 18:34:31,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878027979] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-13 18:34:31,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2021-11-13 18:34:31,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8
[2021-11-13 18:34:31,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050954120]
[2021-11-13 18:34:31,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2021-11-13 18:34:31,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2021-11-13 18:34:31,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:34:31,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2021-11-13 18:34:31,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2021-11-13 18:34:31,114 INFO L87 Difference]: Start difference. First operand 116 states and 142 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16)
[2021-11-13 18:34:31,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:34:31,706 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions.
[2021-11-13 18:34:31,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2021-11-13 18:34:31,706 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 51
[2021-11-13 18:34:31,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:34:31,708 INFO L225 Difference]: With dead ends: 142
[2021-11-13 18:34:31,708 INFO L226 Difference]: Without dead ends: 131
[2021-11-13 18:34:31,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90
[2021-11-13 18:34:31,709 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 504.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.47ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 533.59ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:34:31,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 168 Invalid, 140 Unknown, 0 Unchecked, 2.47ms Time], IncrementalHoareTripleChecker [37 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 533.59ms Time]
[2021-11-13 18:34:31,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states.
[2021-11-13 18:34:31,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131.
[2021-11-13 18:34:31,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 80 states have (on average 1.0875) internal successors, (87), 83 states have internal predecessors, (87), 29 states have call successors, (29), 21 states have call predecessors, (29), 21 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26)
[2021-11-13 18:34:31,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions.
[2021-11-13 18:34:31,731 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 51
[2021-11-13 18:34:31,731 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:34:31,731 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions.
[2021-11-13 18:34:31,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16)
[2021-11-13 18:34:31,732 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions.
[2021-11-13 18:34:31,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2021-11-13 18:34:31,733 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:34:31,733 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:34:31,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2021-11-13 18:34:31,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:31,948 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:34:31,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:34:31,948 INFO L85 PathProgramCache]: Analyzing trace with hash 616227619, now seen corresponding path program 1 times
[2021-11-13 18:34:31,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:34:31,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536714089]
[2021-11-13 18:34:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:31,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:34:31,958 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-13 18:34:31,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053886755]
[2021-11-13 18:34:31,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:31,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:31,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:34:31,960 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:34:31,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2021-11-13 18:34:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:34:32,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core
[2021-11-13 18:34:32,023 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:34:32,398 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked.
[2021-11-13 18:34:32,399 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:34:32,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:34:32,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536714089]
[2021-11-13 18:34:32,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-13 18:34:32,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053886755]
[2021-11-13 18:34:32,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053886755] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-13 18:34:32,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences.
[2021-11-13 18:34:32,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2021-11-13 18:34:32,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381929717]
[2021-11-13 18:34:32,708 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton
[2021-11-13 18:34:32,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2021-11-13 18:34:32,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:34:32,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2021-11-13 18:34:32,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90
[2021-11-13 18:34:32,709 INFO L87 Difference]: Start difference. First operand 131 states and 142 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)
[2021-11-13 18:34:32,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:34:32,844 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions.
[2021-11-13 18:34:32,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2021-11-13 18:34:32,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 67
[2021-11-13 18:34:32,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:34:32,847 INFO L225 Difference]: With dead ends: 137
[2021-11-13 18:34:32,847 INFO L226 Difference]: Without dead ends: 133
[2021-11-13 18:34:32,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132
[2021-11-13 18:34:32,848 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.59ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.90ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:34:32,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 175 Invalid, 91 Unknown, 0 Unchecked, 1.59ms Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 92.90ms Time]
[2021-11-13 18:34:32,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states.
[2021-11-13 18:34:32,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133.
[2021-11-13 18:34:32,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 84 states have internal predecessors, (88), 29 states have call successors, (29), 22 states have call predecessors, (29), 21 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26)
[2021-11-13 18:34:32,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions.
[2021-11-13 18:34:32,867 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 67
[2021-11-13 18:34:32,867 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:34:32,867 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions.
[2021-11-13 18:34:32,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)
[2021-11-13 18:34:32,868 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions.
[2021-11-13 18:34:32,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73
[2021-11-13 18:34:32,869 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:34:32,870 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:34:32,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2021-11-13 18:34:33,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:33,084 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:34:33,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:34:33,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1808123650, now seen corresponding path program 1 times
[2021-11-13 18:34:33,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:34:33,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83002438]
[2021-11-13 18:34:33,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:33,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:34:33,093 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-13 18:34:33,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082680034]
[2021-11-13 18:34:33,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:33,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:33,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:34:33,103 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:34:33,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2021-11-13 18:34:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:34:33,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core
[2021-11-13 18:34:33,181 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:34:33,584 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked.
[2021-11-13 18:34:33,584 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:34:33,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:34:33,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83002438]
[2021-11-13 18:34:33,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-13 18:34:33,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082680034]
[2021-11-13 18:34:33,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082680034] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-13 18:34:33,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences.
[2021-11-13 18:34:33,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2021-11-13 18:34:33,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939889591]
[2021-11-13 18:34:33,872 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton
[2021-11-13 18:34:33,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2021-11-13 18:34:33,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:34:33,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2021-11-13 18:34:33,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2021-11-13 18:34:33,874 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12)
[2021-11-13 18:34:33,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:34:33,999 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions.
[2021-11-13 18:34:34,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2021-11-13 18:34:34,000 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 72
[2021-11-13 18:34:34,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:34:34,003 INFO L225 Difference]: With dead ends: 135
[2021-11-13 18:34:34,004 INFO L226 Difference]: Without dead ends: 124
[2021-11-13 18:34:34,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132
[2021-11-13 18:34:34,005 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.56ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.21ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:34:34,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 205 Invalid, 71 Unknown, 0 Unchecked, 1.56ms Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 86.21ms Time]
[2021-11-13 18:34:34,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states.
[2021-11-13 18:34:34,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124.
[2021-11-13 18:34:34,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 79 states have internal predecessors, (82), 26 states have call successors, (26), 20 states have call predecessors, (26), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24)
[2021-11-13 18:34:34,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 132 transitions.
[2021-11-13 18:34:34,021 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 132 transitions. Word has length 72
[2021-11-13 18:34:34,021 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:34:34,021 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 132 transitions.
[2021-11-13 18:34:34,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12)
[2021-11-13 18:34:34,022 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 132 transitions.
[2021-11-13 18:34:34,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75
[2021-11-13 18:34:34,023 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:34:34,024 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1]
[2021-11-13 18:34:34,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0
[2021-11-13 18:34:34,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2021-11-13 18:34:34,239 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:34:34,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:34:34,239 INFO L85 PathProgramCache]: Analyzing trace with hash -207258189, now seen corresponding path program 4 times
[2021-11-13 18:34:34,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:34:34,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193827648]
[2021-11-13 18:34:34,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:34,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:34:34,249 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-13 18:34:34,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743005115]
[2021-11-13 18:34:34,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2021-11-13 18:34:34,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:34,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:34:34,250 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:34:34,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2021-11-13 18:34:36,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2021-11-13 18:34:36,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2021-11-13 18:34:36,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 46 conjunts are in the unsatisfiable core
[2021-11-13 18:34:36,219 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:34:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 81 proven. 69 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked.
[2021-11-13 18:34:36,664 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:34:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 97 proven. 22 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked.
[2021-11-13 18:34:37,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:34:37,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193827648]
[2021-11-13 18:34:37,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-13 18:34:37,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743005115]
[2021-11-13 18:34:37,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743005115] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-13 18:34:37,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2021-11-13 18:34:37,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16
[2021-11-13 18:34:37,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383948859]
[2021-11-13 18:34:37,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2021-11-13 18:34:37,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states
[2021-11-13 18:34:37,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:34:37,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2021-11-13 18:34:37,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240
[2021-11-13 18:34:37,137 INFO L87 Difference]: Start difference. First operand 124 states and 132 transitions. Second operand has 16 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 9 states have internal predecessors, (25), 10 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22)
[2021-11-13 18:34:37,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:34:37,386 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions.
[2021-11-13 18:34:37,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2021-11-13 18:34:37,387 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 9 states have internal predecessors, (25), 10 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 74
[2021-11-13 18:34:37,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:34:37,388 INFO L225 Difference]: With dead ends: 134
[2021-11-13 18:34:37,388 INFO L226 Difference]: Without dead ends: 132
[2021-11-13 18:34:37,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306
[2021-11-13 18:34:37,389 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 185.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.43ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 205.42ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:34:37,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 125 Invalid, 119 Unknown, 0 Unchecked, 1.43ms Time], IncrementalHoareTripleChecker [30 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 205.42ms Time]
[2021-11-13 18:34:37,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states.
[2021-11-13 18:34:37,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126.
[2021-11-13 18:34:37,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 80 states have (on average 1.05) internal successors, (84), 82 states have internal predecessors, (84), 24 states have call successors, (24), 21 states have call predecessors, (24), 21 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23)
[2021-11-13 18:34:37,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions.
[2021-11-13 18:34:37,406 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 74
[2021-11-13 18:34:37,407 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:34:37,408 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions.
[2021-11-13 18:34:37,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 9 states have internal predecessors, (25), 10 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22)
[2021-11-13 18:34:37,408 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions.
[2021-11-13 18:34:37,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96
[2021-11-13 18:34:37,417 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:34:37,418 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:34:37,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0
[2021-11-13 18:34:37,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12
[2021-11-13 18:34:37,624 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:34:37,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:34:37,625 INFO L85 PathProgramCache]: Analyzing trace with hash 308615369, now seen corresponding path program 2 times
[2021-11-13 18:34:37,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:34:37,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951652947]
[2021-11-13 18:34:37,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:37,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:34:37,631 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-13 18:34:37,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792800721]
[2021-11-13 18:34:37,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2021-11-13 18:34:37,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:37,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:34:37,637 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:34:37,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2021-11-13 18:34:37,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2021-11-13 18:34:37,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2021-11-13 18:34:37,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 27 conjunts are in the unsatisfiable core
[2021-11-13 18:34:37,726 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:34:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 32 proven. 24 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked.
[2021-11-13 18:34:38,205 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:34:38,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:34:38,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951652947]
[2021-11-13 18:34:38,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-13 18:34:38,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792800721]
[2021-11-13 18:34:38,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792800721] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-13 18:34:38,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences.
[2021-11-13 18:34:38,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2021-11-13 18:34:38,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147333710]
[2021-11-13 18:34:38,507 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton
[2021-11-13 18:34:38,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2021-11-13 18:34:38,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:34:38,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2021-11-13 18:34:38,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2021-11-13 18:34:38,508 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16)
[2021-11-13 18:34:38,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:34:38,684 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions.
[2021-11-13 18:34:38,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2021-11-13 18:34:38,686 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 95
[2021-11-13 18:34:38,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:34:38,686 INFO L225 Difference]: With dead ends: 134
[2021-11-13 18:34:38,687 INFO L226 Difference]: Without dead ends: 132
[2021-11-13 18:34:38,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156
[2021-11-13 18:34:38,687 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.79ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 127.33ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:34:38,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 240 Invalid, 158 Unknown, 0 Unchecked, 1.79ms Time], IncrementalHoareTripleChecker [16 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 127.33ms Time]
[2021-11-13 18:34:38,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states.
[2021-11-13 18:34:38,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131.
[2021-11-13 18:34:38,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 85 states have internal predecessors, (87), 25 states have call successors, (25), 22 states have call predecessors, (25), 22 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24)
[2021-11-13 18:34:38,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 136 transitions.
[2021-11-13 18:34:38,704 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 136 transitions. Word has length 95
[2021-11-13 18:34:38,705 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:34:38,705 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 136 transitions.
[2021-11-13 18:34:38,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16)
[2021-11-13 18:34:38,705 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 136 transitions.
[2021-11-13 18:34:38,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101
[2021-11-13 18:34:38,709 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:34:38,709 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:34:38,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0
[2021-11-13 18:34:38,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13
[2021-11-13 18:34:38,936 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:34:38,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:34:38,936 INFO L85 PathProgramCache]: Analyzing trace with hash 75049244, now seen corresponding path program 2 times
[2021-11-13 18:34:38,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:34:38,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890382082]
[2021-11-13 18:34:38,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:38,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:34:38,944 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-13 18:34:38,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418151261]
[2021-11-13 18:34:38,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2021-11-13 18:34:38,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:38,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:34:38,955 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:34:38,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2021-11-13 18:34:39,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2021-11-13 18:34:39,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2021-11-13 18:34:39,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 23 conjunts are in the unsatisfiable core
[2021-11-13 18:34:39,063 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:34:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked.
[2021-11-13 18:34:39,526 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:34:39,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:34:39,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890382082]
[2021-11-13 18:34:39,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-13 18:34:39,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418151261]
[2021-11-13 18:34:39,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418151261] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-13 18:34:39,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences.
[2021-11-13 18:34:39,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2021-11-13 18:34:39,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172954773]
[2021-11-13 18:34:39,851 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton
[2021-11-13 18:34:39,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2021-11-13 18:34:39,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:34:39,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2021-11-13 18:34:39,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2021-11-13 18:34:39,852 INFO L87 Difference]: Start difference. First operand 131 states and 136 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17)
[2021-11-13 18:34:40,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:34:40,019 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions.
[2021-11-13 18:34:40,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2021-11-13 18:34:40,020 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 100
[2021-11-13 18:34:40,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:34:40,021 INFO L225 Difference]: With dead ends: 138
[2021-11-13 18:34:40,021 INFO L226 Difference]: Without dead ends: 125
[2021-11-13 18:34:40,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156
[2021-11-13 18:34:40,022 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.13ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 126.84ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:34:40,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 249 Invalid, 150 Unknown, 0 Unchecked, 2.13ms Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 126.84ms Time]
[2021-11-13 18:34:40,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states.
[2021-11-13 18:34:40,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125.
[2021-11-13 18:34:40,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.0375) internal successors, (83), 81 states have internal predecessors, (83), 23 states have call successors, (23), 21 states have call predecessors, (23), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22)
[2021-11-13 18:34:40,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions.
[2021-11-13 18:34:40,054 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 100
[2021-11-13 18:34:40,054 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:34:40,055 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions.
[2021-11-13 18:34:40,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17)
[2021-11-13 18:34:40,055 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions.
[2021-11-13 18:34:40,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124
[2021-11-13 18:34:40,057 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:34:40,057 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:34:40,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0
[2021-11-13 18:34:40,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14
[2021-11-13 18:34:40,280 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:34:40,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:34:40,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1859389073, now seen corresponding path program 3 times
[2021-11-13 18:34:40,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:34:40,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835714756]
[2021-11-13 18:34:40,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:40,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:34:40,290 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-13 18:34:40,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785458134]
[2021-11-13 18:34:40,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2021-11-13 18:34:40,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:40,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:34:40,297 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:34:40,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2021-11-13 18:34:41,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2021-11-13 18:34:41,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2021-11-13 18:34:41,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core
[2021-11-13 18:34:41,042 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:34:41,463 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 110 proven. 16 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked.
[2021-11-13 18:34:41,463 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:34:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 110 proven. 16 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked.
[2021-11-13 18:34:42,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:34:42,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835714756]
[2021-11-13 18:34:42,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-13 18:34:42,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785458134]
[2021-11-13 18:34:42,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785458134] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-13 18:34:42,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2021-11-13 18:34:42,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12
[2021-11-13 18:34:42,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858701471]
[2021-11-13 18:34:42,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2021-11-13 18:34:42,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2021-11-13 18:34:42,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:34:42,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2021-11-13 18:34:42,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132
[2021-11-13 18:34:42,725 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 6 states have call successors, (16)
[2021-11-13 18:34:43,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:34:43,788 INFO L93 Difference]: Finished difference Result 134 states and 138 transitions.
[2021-11-13 18:34:43,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2021-11-13 18:34:43,789 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 6 states have call successors, (16) Word has length 123
[2021-11-13 18:34:43,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:34:43,790 INFO L225 Difference]: With dead ends: 134
[2021-11-13 18:34:43,790 INFO L226 Difference]: Without dead ends: 132
[2021-11-13 18:34:43,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210
[2021-11-13 18:34:43,791 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 968.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.02ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 997.20ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:34:43,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 115 Invalid, 135 Unknown, 0 Unchecked, 2.02ms Time], IncrementalHoareTripleChecker [28 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 997.20ms Time]
[2021-11-13 18:34:43,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states.
[2021-11-13 18:34:43,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131.
[2021-11-13 18:34:43,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 83 states have (on average 1.036144578313253) internal successors, (86), 85 states have internal predecessors, (86), 25 states have call successors, (25), 22 states have call predecessors, (25), 22 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24)
[2021-11-13 18:34:43,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions.
[2021-11-13 18:34:43,807 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 123
[2021-11-13 18:34:43,808 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:34:43,808 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions.
[2021-11-13 18:34:43,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 6 states have call successors, (16)
[2021-11-13 18:34:43,808 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions.
[2021-11-13 18:34:43,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126
[2021-11-13 18:34:43,810 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:34:43,810 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:34:43,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0
[2021-11-13 18:34:44,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:44,017 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:34:44,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:34:44,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1602424598, now seen corresponding path program 2 times
[2021-11-13 18:34:44,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:34:44,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268502896]
[2021-11-13 18:34:44,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:44,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:34:44,026 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-13 18:34:44,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291082777]
[2021-11-13 18:34:44,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2021-11-13 18:34:44,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:44,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:34:44,048 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:34:44,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2021-11-13 18:34:44,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2021-11-13 18:34:44,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2021-11-13 18:34:44,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 11 conjunts are in the unsatisfiable core
[2021-11-13 18:34:44,120 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:34:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked.
[2021-11-13 18:34:44,429 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:34:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked.
[2021-11-13 18:34:44,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:34:44,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268502896]
[2021-11-13 18:34:44,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-13 18:34:44,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291082777]
[2021-11-13 18:34:44,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291082777] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-13 18:34:44,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2021-11-13 18:34:44,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14
[2021-11-13 18:34:44,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899923730]
[2021-11-13 18:34:44,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2021-11-13 18:34:44,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states
[2021-11-13 18:34:44,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:34:44,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2021-11-13 18:34:44,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182
[2021-11-13 18:34:44,731 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42)
[2021-11-13 18:34:45,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:34:45,180 INFO L93 Difference]: Finished difference Result 390 states and 406 transitions.
[2021-11-13 18:34:45,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states.
[2021-11-13 18:34:45,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) Word has length 125
[2021-11-13 18:34:45,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:34:45,185 INFO L225 Difference]: With dead ends: 390
[2021-11-13 18:34:45,185 INFO L226 Difference]: Without dead ends: 365
[2021-11-13 18:34:45,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506
[2021-11-13 18:34:45,186 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 147 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 252.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.99ms SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 322.92ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:34:45,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 341 Invalid, 356 Unknown, 0 Unchecked, 4.99ms Time], IncrementalHoareTripleChecker [111 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 322.92ms Time]
[2021-11-13 18:34:45,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states.
[2021-11-13 18:34:45,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 313.
[2021-11-13 18:34:45,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 196 states have (on average 1.0459183673469388) internal successors, (205), 203 states have internal predecessors, (205), 63 states have call successors, (63), 54 states have call predecessors, (63), 53 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61)
[2021-11-13 18:34:45,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 329 transitions.
[2021-11-13 18:34:45,227 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 329 transitions. Word has length 125
[2021-11-13 18:34:45,228 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:34:45,228 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 329 transitions.
[2021-11-13 18:34:45,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42)
[2021-11-13 18:34:45,228 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 329 transitions.
[2021-11-13 18:34:45,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129
[2021-11-13 18:34:45,230 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:34:45,230 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:34:45,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0
[2021-11-13 18:34:45,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:45,444 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:34:45,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:34:45,444 INFO L85 PathProgramCache]: Analyzing trace with hash 709017654, now seen corresponding path program 3 times
[2021-11-13 18:34:45,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:34:45,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591352473]
[2021-11-13 18:34:45,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:45,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:34:45,452 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-13 18:34:45,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859626614]
[2021-11-13 18:34:45,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2021-11-13 18:34:45,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:45,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:34:45,455 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:34:45,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2021-11-13 18:34:45,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2021-11-13 18:34:45,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2021-11-13 18:34:45,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjunts are in the unsatisfiable core
[2021-11-13 18:34:45,523 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:34:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 44 proven. 48 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked.
[2021-11-13 18:34:46,142 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:34:46,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:34:46,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591352473]
[2021-11-13 18:34:46,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-13 18:34:46,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859626614]
[2021-11-13 18:34:46,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859626614] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-13 18:34:46,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences.
[2021-11-13 18:34:46,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9
[2021-11-13 18:34:46,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609200964]
[2021-11-13 18:34:46,487 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton
[2021-11-13 18:34:46,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2021-11-13 18:34:46,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:34:46,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2021-11-13 18:34:46,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2021-11-13 18:34:46,488 INFO L87 Difference]: Start difference. First operand 313 states and 329 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22)
[2021-11-13 18:34:46,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:34:46,738 INFO L93 Difference]: Finished difference Result 319 states and 335 transitions.
[2021-11-13 18:34:46,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2021-11-13 18:34:46,739 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 128
[2021-11-13 18:34:46,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:34:46,741 INFO L225 Difference]: With dead ends: 319
[2021-11-13 18:34:46,741 INFO L226 Difference]: Without dead ends: 312
[2021-11-13 18:34:46,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182
[2021-11-13 18:34:46,742 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 6 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 167.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.76ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 191.11ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:34:46,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 370 Invalid, 180 Unknown, 0 Unchecked, 2.76ms Time], IncrementalHoareTripleChecker [6 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 191.11ms Time]
[2021-11-13 18:34:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states.
[2021-11-13 18:34:46,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312.
[2021-11-13 18:34:46,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 196 states have (on average 1.0408163265306123) internal successors, (204), 202 states have internal predecessors, (204), 62 states have call successors, (62), 54 states have call predecessors, (62), 53 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60)
[2021-11-13 18:34:46,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 326 transitions.
[2021-11-13 18:34:46,776 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 326 transitions. Word has length 128
[2021-11-13 18:34:46,776 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:34:46,776 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 326 transitions.
[2021-11-13 18:34:46,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22)
[2021-11-13 18:34:46,777 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 326 transitions.
[2021-11-13 18:34:46,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157
[2021-11-13 18:34:46,779 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:34:46,779 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:34:46,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0
[2021-11-13 18:34:46,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2021-11-13 18:34:46,992 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:34:46,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:34:46,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1972302768, now seen corresponding path program 4 times
[2021-11-13 18:34:46,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:34:46,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100044735]
[2021-11-13 18:34:46,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:34:46,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:34:47,014 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-13 18:34:47,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597454616]
[2021-11-13 18:34:47,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2021-11-13 18:34:47,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:34:47,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:34:47,020 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:34:47,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2021-11-13 18:34:49,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2021-11-13 18:34:49,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2021-11-13 18:34:49,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 82 conjunts are in the unsatisfiable core
[2021-11-13 18:34:49,941 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:34:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 310 proven. 320 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked.
[2021-11-13 18:34:53,283 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:34:55,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:34:55,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100044735]
[2021-11-13 18:34:55,846 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-13 18:34:55,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597454616]
[2021-11-13 18:34:55,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597454616] provided 0 perfect and 1 imperfect interpolant sequences
[2021-11-13 18:34:55,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences.
[2021-11-13 18:34:55,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14
[2021-11-13 18:34:55,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684945011]
[2021-11-13 18:34:55,848 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton
[2021-11-13 18:34:55,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states
[2021-11-13 18:34:55,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:34:55,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2021-11-13 18:34:55,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380
[2021-11-13 18:34:55,849 INFO L87 Difference]: Start difference. First operand 312 states and 326 transitions. Second operand has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 9 states have internal predecessors, (23), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20)
[2021-11-13 18:34:59,479 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2021-11-13 18:35:06,134 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2021-11-13 18:35:08,140 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2021-11-13 18:35:09,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:35:09,521 INFO L93 Difference]: Finished difference Result 319 states and 332 transitions.
[2021-11-13 18:35:09,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2021-11-13 18:35:09,522 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 9 states have internal predecessors, (23), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) Word has length 156
[2021-11-13 18:35:09,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:35:09,525 INFO L225 Difference]: With dead ends: 319
[2021-11-13 18:35:09,525 INFO L226 Difference]: Without dead ends: 293
[2021-11-13 18:35:09,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 175 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552
[2021-11-13 18:35:09,527 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 53 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11539.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.90ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11572.01ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:35:09,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 133 Invalid, 186 Unknown, 0 Unchecked, 1.90ms Time], IncrementalHoareTripleChecker [53 Valid, 131 Invalid, 2 Unknown, 0 Unchecked, 11572.01ms Time]
[2021-11-13 18:35:09,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states.
[2021-11-13 18:35:09,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293.
[2021-11-13 18:35:09,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 189 states have internal predecessors, (190), 53 states have call successors, (53), 51 states have call predecessors, (53), 51 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52)
[2021-11-13 18:35:09,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 295 transitions.
[2021-11-13 18:35:09,557 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 295 transitions. Word has length 156
[2021-11-13 18:35:09,557 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:35:09,558 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 295 transitions.
[2021-11-13 18:35:09,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 9 states have internal predecessors, (23), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20)
[2021-11-13 18:35:09,558 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 295 transitions.
[2021-11-13 18:35:09,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294
[2021-11-13 18:35:09,563 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:35:09,563 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 51, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:35:09,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0
[2021-11-13 18:35:09,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:35:09,771 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:35:09,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:35:09,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1951591730, now seen corresponding path program 3 times
[2021-11-13 18:35:09,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:35:09,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993714781]
[2021-11-13 18:35:09,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:35:09,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:35:09,780 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-13 18:35:09,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546548069]
[2021-11-13 18:35:09,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2021-11-13 18:35:09,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:35:09,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:35:09,787 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:35:09,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process
[2021-11-13 18:35:10,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s)
[2021-11-13 18:35:10,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2021-11-13 18:35:10,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 23 conjunts are in the unsatisfiable core
[2021-11-13 18:35:10,143 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:35:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5582 backedges. 300 proven. 4880 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked.
[2021-11-13 18:35:10,887 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:35:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5582 backedges. 102 proven. 380 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked.
[2021-11-13 18:35:11,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2021-11-13 18:35:11,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993714781]
[2021-11-13 18:35:11,621 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2021-11-13 18:35:11,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546548069]
[2021-11-13 18:35:11,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546548069] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-13 18:35:11,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2021-11-13 18:35:11,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24
[2021-11-13 18:35:11,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467491516]
[2021-11-13 18:35:11,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2021-11-13 18:35:11,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states
[2021-11-13 18:35:11,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-11-13 18:35:11,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2021-11-13 18:35:11,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552
[2021-11-13 18:35:11,625 INFO L87 Difference]: Start difference. First operand 293 states and 295 transitions. Second operand has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 20 states have call successors, (103), 12 states have call predecessors, (103), 12 states have return successors, (102), 20 states have call predecessors, (102), 20 states have call successors, (102)
[2021-11-13 18:35:12,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:35:12,440 INFO L93 Difference]: Finished difference Result 586 states and 598 transitions.
[2021-11-13 18:35:12,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states.
[2021-11-13 18:35:12,441 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 20 states have call successors, (103), 12 states have call predecessors, (103), 12 states have return successors, (102), 20 states have call predecessors, (102), 20 states have call successors, (102) Word has length 293
[2021-11-13 18:35:12,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:35:12,445 INFO L225 Difference]: With dead ends: 586
[2021-11-13 18:35:12,445 INFO L226 Difference]: Without dead ends: 573
[2021-11-13 18:35:12,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 561 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=665, Invalid=1141, Unknown=0, NotChecked=0, Total=1806
[2021-11-13 18:35:12,448 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 169 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 375.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.69ms SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 476.29ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:35:12,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 490 Invalid, 619 Unknown, 0 Unchecked, 7.69ms Time], IncrementalHoareTripleChecker [159 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 476.29ms Time]
[2021-11-13 18:35:12,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states.
[2021-11-13 18:35:12,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 573.
[2021-11-13 18:35:12,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 368 states have (on average 1.0054347826086956) internal successors, (370), 369 states have internal predecessors, (370), 103 states have call successors, (103), 101 states have call predecessors, (103), 101 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102)
[2021-11-13 18:35:12,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 575 transitions.
[2021-11-13 18:35:12,502 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 575 transitions. Word has length 293
[2021-11-13 18:35:12,503 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:35:12,503 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 575 transitions.
[2021-11-13 18:35:12,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 20 states have call successors, (103), 12 states have call predecessors, (103), 12 states have return successors, (102), 20 states have call predecessors, (102), 20 states have call successors, (102)
[2021-11-13 18:35:12,504 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 575 transitions.
[2021-11-13 18:35:12,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574
[2021-11-13 18:35:12,542 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:35:12,542 INFO L514 BasicCegarLoop]: trace histogram [102, 101, 101, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:35:12,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0
[2021-11-13 18:35:12,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:35:12,748 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:35:12,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:35:12,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1295956810, now seen corresponding path program 4 times
[2021-11-13 18:35:12,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-11-13 18:35:12,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225142918]
[2021-11-13 18:35:12,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:35:12,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2021-11-13 18:35:12,763 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2021-11-13 18:35:12,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359252697]
[2021-11-13 18:35:12,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2021-11-13 18:35:12,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:35:12,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:35:12,765 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:35:12,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process
[2021-11-13 18:35:13,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2021-11-13 18:35:13,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat
[2021-11-13 18:35:13,083 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-11-13 18:35:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-11-13 18:35:13,627 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2021-11-13 18:35:13,627 INFO L628 BasicCegarLoop]: Counterexample is feasible
[2021-11-13 18:35:13,628 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2021-11-13 18:35:13,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0
[2021-11-13 18:35:13,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20
[2021-11-13 18:35:13,834 INFO L732 BasicCegarLoop]: Path program histogram: [4, 4, 4, 3, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:35:13,838 INFO L179 ceAbstractionStarter]: Computing trace abstraction results
[2021-11-13 18:35:13,920 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception:
java.lang.NullPointerException
at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230)
at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206)
at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getProgramExecutionAsString(CounterExampleResult.java:155)
at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getLongDescription(CounterExampleResult.java:134)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.<init>(TraceAbstractionStarter.java:155)
at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320)
at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
[2021-11-13 18:35:13,923 INFO L158 Benchmark]: Toolchain (without parser) took 49627.27ms. Allocated memory was 107.0MB in the beginning and 169.9MB in the end (delta: 62.9MB). Free memory was 69.1MB in the beginning and 74.7MB in the end (delta: -5.6MB). Peak memory consumption was 57.4MB. Max. memory is 16.1GB.
[2021-11-13 18:35:13,923 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 107.0MB. Free memory is still 85.5MB. There was no memory consumed. Max. memory is 16.1GB.
[2021-11-13 18:35:13,924 INFO L158 Benchmark]: CACSL2BoogieTranslator took 283.35ms. Allocated memory is still 107.0MB. Free memory was 68.9MB in the beginning and 81.5MB in the end (delta: -12.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB.
[2021-11-13 18:35:13,924 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.22ms. Allocated memory is still 107.0MB. Free memory was 81.5MB in the beginning and 79.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
[2021-11-13 18:35:13,924 INFO L158 Benchmark]: Boogie Preprocessor took 46.08ms. Allocated memory is still 107.0MB. Free memory was 79.7MB in the beginning and 78.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
[2021-11-13 18:35:13,925 INFO L158 Benchmark]: RCFGBuilder took 302.42ms. Allocated memory is still 107.0MB. Free memory was 78.7MB in the beginning and 68.5MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB.
[2021-11-13 18:35:13,925 INFO L158 Benchmark]: TraceAbstraction took 48925.17ms. Allocated memory was 107.0MB in the beginning and 169.9MB in the end (delta: 62.9MB). Free memory was 67.8MB in the beginning and 74.7MB in the end (delta: -6.9MB). Peak memory consumption was 57.8MB. Max. memory is 16.1GB.
[2021-11-13 18:35:13,927 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.28ms. Allocated memory is still 107.0MB. Free memory is still 85.5MB. There was no memory consumed. Max. memory is 16.1GB.
* CACSL2BoogieTranslator took 283.35ms. Allocated memory is still 107.0MB. Free memory was 68.9MB in the beginning and 81.5MB in the end (delta: -12.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB.
* Boogie Procedure Inliner took 60.22ms. Allocated memory is still 107.0MB. Free memory was 81.5MB in the beginning and 79.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
* Boogie Preprocessor took 46.08ms. Allocated memory is still 107.0MB. Free memory was 79.7MB in the beginning and 78.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
* RCFGBuilder took 302.42ms. Allocated memory is still 107.0MB. Free memory was 78.7MB in the beginning and 68.5MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB.
* TraceAbstraction took 48925.17ms. Allocated memory was 107.0MB in the beginning and 169.9MB in the end (delta: 62.9MB). Free memory was 67.8MB in the beginning and 74.7MB in the end (delta: -6.9MB). Peak memory consumption was 57.8MB. Max. memory is 16.1GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- StatisticsResult: ErrorAutomatonStatistics
NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0
- ExceptionOrErrorResult: NullPointerException: null
de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230)
RESULT: Ultimate could not prove your program: Toolchain returned no result.
[2021-11-13 18:35:13,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0
Received shutdown request...
--- End real Ultimate output ---
Execution finished normally
Using bit-precise analysis
Retrying with bit-precise analysis
### Bit-precise run ###
Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )
--witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 820aaba80b9c7e4ca2ad4a6a908bac2e6f59545dc6a131cb9fae6306b993a9eb
--- Real Ultimate output ---
This is Ultimate 0.2.1-dev-63182f1
[2021-11-13 18:35:16,552 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-11-13 18:35:16,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2021-11-13 18:35:16,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-11-13 18:35:16,598 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-11-13 18:35:16,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-11-13 18:35:16,602 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-11-13 18:35:16,604 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2021-11-13 18:35:16,607 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-11-13 18:35:16,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-11-13 18:35:16,610 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2021-11-13 18:35:16,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-11-13 18:35:16,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-11-13 18:35:16,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-11-13 18:35:16,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-11-13 18:35:16,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-11-13 18:35:16,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-11-13 18:35:16,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-11-13 18:35:16,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-11-13 18:35:16,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2021-11-13 18:35:16,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-11-13 18:35:16,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-11-13 18:35:16,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2021-11-13 18:35:16,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-11-13 18:35:16,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-11-13 18:35:16,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-11-13 18:35:16,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-11-13 18:35:16,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-11-13 18:35:16,650 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-11-13 18:35:16,652 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-11-13 18:35:16,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-11-13 18:35:16,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-11-13 18:35:16,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-11-13 18:35:16,656 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2021-11-13 18:35:16,657 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-11-13 18:35:16,658 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2021-11-13 18:35:16,659 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2021-11-13 18:35:16,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2021-11-13 18:35:16,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2021-11-13 18:35:16,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2021-11-13 18:35:16,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2021-11-13 18:35:16,664 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Bitvector.epf
[2021-11-13 18:35:16,700 INFO L113 SettingsManager]: Loading preferences was successful
[2021-11-13 18:35:16,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-11-13 18:35:16,706 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2021-11-13 18:35:16,707 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2021-11-13 18:35:16,708 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2021-11-13 18:35:16,709 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2021-11-13 18:35:16,711 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2021-11-13 18:35:16,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2021-11-13 18:35:16,712 INFO L138 SettingsManager]: * Use SBE=true
[2021-11-13 18:35:16,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-11-13 18:35:16,714 INFO L138 SettingsManager]: * sizeof long=4
[2021-11-13 18:35:16,714 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-11-13 18:35:16,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-11-13 18:35:16,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-11-13 18:35:16,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-11-13 18:35:16,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-11-13 18:35:16,715 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true
[2021-11-13 18:35:16,716 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution
[2021-11-13 18:35:16,716 INFO L138 SettingsManager]: * sizeof long double=12
[2021-11-13 18:35:16,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-11-13 18:35:16,716 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-11-13 18:35:16,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-11-13 18:35:16,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-11-13 18:35:16,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2021-11-13 18:35:16,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-11-13 18:35:16,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-11-13 18:35:16,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-11-13 18:35:16,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2021-11-13 18:35:16,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-11-13 18:35:16,718 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF
[2021-11-13 18:35:16,719 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt
[2021-11-13 18:35:16,719 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF
[2021-11-13 18:35:16,719 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET
[2021-11-13 18:35:16,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-11-13 18:35:16,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2021-11-13 18:35:16,720 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
[2021-11-13 18:35:16,720 INFO L138 SettingsManager]: * Logic for external solver=AUFBV
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_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 820aaba80b9c7e4ca2ad4a6a908bac2e6f59545dc6a131cb9fae6306b993a9eb
[2021-11-13 18:35:17,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-11-13 18:35:17,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-11-13 18:35:17,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-11-13 18:35:17,175 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-11-13 18:35:17,175 INFO L275 PluginConnector]: CDTParser initialized
[2021-11-13 18:35:17,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c
[2021-11-13 18:35:17,256 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/data/78d956ddc/ae690bc8419c450696bea1f67bbcfd4a/FLAGa8ec9a18c
[2021-11-13 18:35:17,880 INFO L306 CDTParser]: Found 1 translation units.
[2021-11-13 18:35:17,883 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c
[2021-11-13 18:35:17,892 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/data/78d956ddc/ae690bc8419c450696bea1f67bbcfd4a/FLAGa8ec9a18c
[2021-11-13 18:35:18,215 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/data/78d956ddc/ae690bc8419c450696bea1f67bbcfd4a
[2021-11-13 18:35:18,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-11-13 18:35:18,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements.
[2021-11-13 18:35:18,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-11-13 18:35:18,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-11-13 18:35:18,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-11-13 18:35:18,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:35:18" (1/1) ...
[2021-11-13 18:35:18,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@432dd987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:35:18, skipping insertion in model container
[2021-11-13 18:35:18,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:35:18" (1/1) ...
[2021-11-13 18:35:18,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-11-13 18:35:18,249 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-11-13 18:35:18,403 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c[588,601]
[2021-11-13 18:35:18,465 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-11-13 18:35:18,492 INFO L203 MainTranslator]: Completed pre-run
[2021-11-13 18:35:18,509 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound20.c[588,601]
[2021-11-13 18:35:18,539 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-11-13 18:35:18,559 INFO L208 MainTranslator]: Completed translation
[2021-11-13 18:35:18,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:35:18 WrapperNode
[2021-11-13 18:35:18,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-11-13 18:35:18,562 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2021-11-13 18:35:18,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner...
[2021-11-13 18:35:18,563 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized
[2021-11-13 18:35:18,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:35:18" (1/1) ...
[2021-11-13 18:35:18,592 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:35:18" (1/1) ...
[2021-11-13 18:35:18,622 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2021-11-13 18:35:18,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-11-13 18:35:18,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-11-13 18:35:18,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-11-13 18:35:18,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:35:18" (1/1) ...
[2021-11-13 18:35:18,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:35:18" (1/1) ...
[2021-11-13 18:35:18,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:35:18" (1/1) ...
[2021-11-13 18:35:18,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:35:18" (1/1) ...
[2021-11-13 18:35:18,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:35:18" (1/1) ...
[2021-11-13 18:35:18,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:35:18" (1/1) ...
[2021-11-13 18:35:18,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:35:18" (1/1) ...
[2021-11-13 18:35:18,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-11-13 18:35:18,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-11-13 18:35:18,679 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-11-13 18:35:18,679 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-11-13 18:35:18,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:35:18" (1/1) ...
[2021-11-13 18:35:18,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-11-13 18:35:18,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:35:18,713 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2021-11-13 18:35:18,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2021-11-13 18:35:18,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1
[2021-11-13 18:35:18,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-11-13 18:35:18,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-11-13 18:35:18,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-11-13 18:35:18,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2021-11-13 18:35:18,769 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2021-11-13 18:35:19,121 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-11-13 18:35:19,121 INFO L299 CfgBuilder]: Removed 1 assume(true) statements.
[2021-11-13 18:35:19,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:35:19 BoogieIcfgContainer
[2021-11-13 18:35:19,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-11-13 18:35:19,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-11-13 18:35:19,126 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-11-13 18:35:19,150 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-11-13 18:35:19,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:35:18" (1/3) ...
[2021-11-13 18:35:19,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b307b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:35:19, skipping insertion in model container
[2021-11-13 18:35:19,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:35:18" (2/3) ...
[2021-11-13 18:35:19,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b307b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:35:19, skipping insertion in model container
[2021-11-13 18:35:19,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:35:19" (3/3) ...
[2021-11-13 18:35:19,161 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound20.c
[2021-11-13 18:35:19,167 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-11-13 18:35:19,183 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2021-11-13 18:35:19,252 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2021-11-13 18:35:19,265 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR
[2021-11-13 18:35:19,266 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2021-11-13 18:35:19,309 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11)
[2021-11-13 18:35:19,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2021-11-13 18:35:19,314 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:35:19,315 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:35:19,315 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:35:19,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:35:19,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1823967074, now seen corresponding path program 1 times
[2021-11-13 18:35:19,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF
[2021-11-13 18:35:19,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1633545017]
[2021-11-13 18:35:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:35:19,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2021-11-13 18:35:19,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat
[2021-11-13 18:35:19,344 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2021-11-13 18:35:19,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process
[2021-11-13 18:35:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:35:19,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core
[2021-11-13 18:35:19,481 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:35:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-13 18:35:19,546 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:35:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-13 18:35:19,565 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2021-11-13 18:35:19,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1633545017]
[2021-11-13 18:35:19,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1633545017] provided 2 perfect and 0 imperfect interpolant sequences
[2021-11-13 18:35:19,566 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences.
[2021-11-13 18:35:19,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2
[2021-11-13 18:35:19,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096730618]
[2021-11-13 18:35:19,569 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton
[2021-11-13 18:35:19,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2021-11-13 18:35:19,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2021-11-13 18:35:19,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2021-11-13 18:35:19,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2021-11-13 18:35:19,599 INFO L87 Difference]: Start difference. First operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-13 18:35:19,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:35:19,623 INFO L93 Difference]: Finished difference Result 50 states and 87 transitions.
[2021-11-13 18:35:19,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states.
[2021-11-13 18:35:19,626 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7
[2021-11-13 18:35:19,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:35:19,633 INFO L225 Difference]: With dead ends: 50
[2021-11-13 18:35:19,633 INFO L226 Difference]: Without dead ends: 22
[2021-11-13 18:35:19,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2021-11-13 18:35:19,641 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.95ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:35:19,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.95ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time]
[2021-11-13 18:35:19,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states.
[2021-11-13 18:35:19,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22.
[2021-11-13 18:35:19,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10)
[2021-11-13 18:35:19,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions.
[2021-11-13 18:35:19,683 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7
[2021-11-13 18:35:19,683 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:35:19,684 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions.
[2021-11-13 18:35:19,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-13 18:35:19,684 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions.
[2021-11-13 18:35:19,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2021-11-13 18:35:19,685 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:35:19,685 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:35:19,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0
[2021-11-13 18:35:19,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3
[2021-11-13 18:35:19,900 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:35:19,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:35:19,901 INFO L85 PathProgramCache]: Analyzing trace with hash 178926099, now seen corresponding path program 1 times
[2021-11-13 18:35:19,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF
[2021-11-13 18:35:19,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047523011]
[2021-11-13 18:35:19,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:35:19,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2021-11-13 18:35:19,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat
[2021-11-13 18:35:19,903 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2021-11-13 18:35:19,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process
[2021-11-13 18:35:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:35:19,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core
[2021-11-13 18:35:19,956 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:35:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-13 18:35:20,050 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:35:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-13 18:35:20,109 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2021-11-13 18:35:20,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047523011]
[2021-11-13 18:35:20,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047523011] provided 2 perfect and 0 imperfect interpolant sequences
[2021-11-13 18:35:20,110 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences.
[2021-11-13 18:35:20,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5
[2021-11-13 18:35:20,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973413345]
[2021-11-13 18:35:20,112 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton
[2021-11-13 18:35:20,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2021-11-13 18:35:20,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2021-11-13 18:35:20,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2021-11-13 18:35:20,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2021-11-13 18:35:20,117 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-13 18:35:22,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:35:22,408 INFO L93 Difference]: Finished difference Result 56 states and 83 transitions.
[2021-11-13 18:35:22,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2021-11-13 18:35:22,420 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8
[2021-11-13 18:35:22,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:35:22,422 INFO L225 Difference]: With dead ends: 56
[2021-11-13 18:35:22,422 INFO L226 Difference]: Without dead ends: 44
[2021-11-13 18:35:22,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42
[2021-11-13 18:35:22,426 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 28 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2041.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.27ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2241.52ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:35:22,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 127 Invalid, 34 Unknown, 0 Unchecked, 6.27ms Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 2241.52ms Time]
[2021-11-13 18:35:22,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states.
[2021-11-13 18:35:22,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42.
[2021-11-13 18:35:22,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20)
[2021-11-13 18:35:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 64 transitions.
[2021-11-13 18:35:22,455 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 64 transitions. Word has length 8
[2021-11-13 18:35:22,455 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:35:22,456 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 64 transitions.
[2021-11-13 18:35:22,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-13 18:35:22,457 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 64 transitions.
[2021-11-13 18:35:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2021-11-13 18:35:22,457 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:35:22,458 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:35:22,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0
[2021-11-13 18:35:22,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3
[2021-11-13 18:35:22,672 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:35:22,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:35:22,674 INFO L85 PathProgramCache]: Analyzing trace with hash 180475231, now seen corresponding path program 1 times
[2021-11-13 18:35:22,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF
[2021-11-13 18:35:22,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28830725]
[2021-11-13 18:35:22,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:35:22,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2021-11-13 18:35:22,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat
[2021-11-13 18:35:22,677 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2021-11-13 18:35:22,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process
[2021-11-13 18:35:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:35:22,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 5 conjunts are in the unsatisfiable core
[2021-11-13 18:35:22,752 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:35:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-13 18:35:22,904 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:35:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-13 18:35:23,185 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2021-11-13 18:35:23,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28830725]
[2021-11-13 18:35:23,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28830725] provided 2 perfect and 0 imperfect interpolant sequences
[2021-11-13 18:35:23,186 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences.
[2021-11-13 18:35:23,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8
[2021-11-13 18:35:23,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814443424]
[2021-11-13 18:35:23,187 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton
[2021-11-13 18:35:23,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2021-11-13 18:35:23,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2021-11-13 18:35:23,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2021-11-13 18:35:23,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2021-11-13 18:35:23,189 INFO L87 Difference]: Start difference. First operand 42 states and 64 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-13 18:35:26,320 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2021-11-13 18:35:27,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:35:27,128 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions.
[2021-11-13 18:35:27,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2021-11-13 18:35:27,140 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8
[2021-11-13 18:35:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:35:27,142 INFO L225 Difference]: With dead ends: 52
[2021-11-13 18:35:27,142 INFO L226 Difference]: Without dead ends: 50
[2021-11-13 18:35:27,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72
[2021-11-13 18:35:27,146 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3615.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.19ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3874.51ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:35:27,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 185 Invalid, 79 Unknown, 0 Unchecked, 6.19ms Time], IncrementalHoareTripleChecker [6 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 3874.51ms Time]
[2021-11-13 18:35:27,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states.
[2021-11-13 18:35:27,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50.
[2021-11-13 18:35:27,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 22 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20)
[2021-11-13 18:35:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 70 transitions.
[2021-11-13 18:35:27,184 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 70 transitions. Word has length 8
[2021-11-13 18:35:27,185 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:35:27,185 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 70 transitions.
[2021-11-13 18:35:27,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2021-11-13 18:35:27,186 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 70 transitions.
[2021-11-13 18:35:27,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2021-11-13 18:35:27,187 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:35:27,188 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:35:27,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0
[2021-11-13 18:35:27,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3
[2021-11-13 18:35:27,390 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:35:27,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:35:27,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1275442234, now seen corresponding path program 1 times
[2021-11-13 18:35:27,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF
[2021-11-13 18:35:27,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1907855907]
[2021-11-13 18:35:27,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:35:27,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2021-11-13 18:35:27,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat
[2021-11-13 18:35:27,394 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2021-11-13 18:35:27,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process
[2021-11-13 18:35:27,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:35:27,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core
[2021-11-13 18:35:27,491 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:35:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-13 18:35:27,683 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:35:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-11-13 18:35:29,969 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2021-11-13 18:35:29,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1907855907]
[2021-11-13 18:35:29,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1907855907] provided 2 perfect and 0 imperfect interpolant sequences
[2021-11-13 18:35:29,970 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences.
[2021-11-13 18:35:29,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8
[2021-11-13 18:35:29,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657684946]
[2021-11-13 18:35:29,971 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton
[2021-11-13 18:35:29,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2021-11-13 18:35:29,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2021-11-13 18:35:29,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2021-11-13 18:35:29,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2021-11-13 18:35:29,973 INFO L87 Difference]: Start difference. First operand 50 states and 70 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2021-11-13 18:35:31,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:35:31,802 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions.
[2021-11-13 18:35:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2021-11-13 18:35:31,815 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13
[2021-11-13 18:35:31,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:35:31,817 INFO L225 Difference]: With dead ends: 56
[2021-11-13 18:35:31,817 INFO L226 Difference]: Without dead ends: 54
[2021-11-13 18:35:31,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72
[2021-11-13 18:35:31,821 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1498.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.74ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1660.09ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:35:31,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 168 Invalid, 35 Unknown, 0 Unchecked, 3.74ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 1660.09ms Time]
[2021-11-13 18:35:31,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states.
[2021-11-13 18:35:31,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54.
[2021-11-13 18:35:31,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 22 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20)
[2021-11-13 18:35:31,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions.
[2021-11-13 18:35:31,843 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 13
[2021-11-13 18:35:31,844 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:35:31,844 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions.
[2021-11-13 18:35:31,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2021-11-13 18:35:31,845 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions.
[2021-11-13 18:35:31,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2021-11-13 18:35:31,846 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:35:31,846 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:35:31,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0
[2021-11-13 18:35:32,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3
[2021-11-13 18:35:32,060 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:35:32,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:35:32,061 INFO L85 PathProgramCache]: Analyzing trace with hash 427545983, now seen corresponding path program 1 times
[2021-11-13 18:35:32,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF
[2021-11-13 18:35:32,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985941642]
[2021-11-13 18:35:32,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:35:32,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2021-11-13 18:35:32,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat
[2021-11-13 18:35:32,067 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2021-11-13 18:35:32,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process
[2021-11-13 18:35:32,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:35:32,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core
[2021-11-13 18:35:32,221 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:35:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2021-11-13 18:35:32,431 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:35:37,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2021-11-13 18:35:37,104 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2021-11-13 18:35:37,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985941642]
[2021-11-13 18:35:37,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985941642] provided 2 perfect and 0 imperfect interpolant sequences
[2021-11-13 18:35:37,105 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences.
[2021-11-13 18:35:37,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8
[2021-11-13 18:35:37,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412221235]
[2021-11-13 18:35:37,106 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton
[2021-11-13 18:35:37,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2021-11-13 18:35:37,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2021-11-13 18:35:37,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2021-11-13 18:35:37,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2021-11-13 18:35:37,108 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2021-11-13 18:35:40,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:35:40,418 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions.
[2021-11-13 18:35:40,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2021-11-13 18:35:40,430 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 18
[2021-11-13 18:35:40,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:35:40,431 INFO L225 Difference]: With dead ends: 60
[2021-11-13 18:35:40,432 INFO L226 Difference]: Without dead ends: 58
[2021-11-13 18:35:40,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72
[2021-11-13 18:35:40,434 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2416.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.18ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2695.54ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:35:40,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 134 Invalid, 44 Unknown, 0 Unchecked, 3.18ms Time], IncrementalHoareTripleChecker [11 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 2695.54ms Time]
[2021-11-13 18:35:40,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states.
[2021-11-13 18:35:40,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58.
[2021-11-13 18:35:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20)
[2021-11-13 18:35:40,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions.
[2021-11-13 18:35:40,452 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 18
[2021-11-13 18:35:40,453 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:35:40,453 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions.
[2021-11-13 18:35:40,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)
[2021-11-13 18:35:40,454 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions.
[2021-11-13 18:35:40,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2021-11-13 18:35:40,455 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:35:40,455 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:35:40,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0
[2021-11-13 18:35:40,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3
[2021-11-13 18:35:40,673 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:35:40,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:35:40,674 INFO L85 PathProgramCache]: Analyzing trace with hash 5607206, now seen corresponding path program 1 times
[2021-11-13 18:35:40,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF
[2021-11-13 18:35:40,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849321303]
[2021-11-13 18:35:40,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:35:40,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2021-11-13 18:35:40,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat
[2021-11-13 18:35:40,676 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2021-11-13 18:35:40,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process
[2021-11-13 18:35:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:35:40,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core
[2021-11-13 18:35:40,862 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:35:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2021-11-13 18:35:41,129 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:35:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2021-11-13 18:35:45,030 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2021-11-13 18:35:45,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849321303]
[2021-11-13 18:35:45,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849321303] provided 2 perfect and 0 imperfect interpolant sequences
[2021-11-13 18:35:45,031 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences.
[2021-11-13 18:35:45,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8
[2021-11-13 18:35:45,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505295561]
[2021-11-13 18:35:45,032 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton
[2021-11-13 18:35:45,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2021-11-13 18:35:45,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2021-11-13 18:35:45,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2021-11-13 18:35:45,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2021-11-13 18:35:45,034 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6)
[2021-11-13 18:35:54,938 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2021-11-13 18:35:55,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:35:55,743 INFO L93 Difference]: Finished difference Result 80 states and 107 transitions.
[2021-11-13 18:35:55,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2021-11-13 18:35:55,754 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 23
[2021-11-13 18:35:55,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:35:55,756 INFO L225 Difference]: With dead ends: 80
[2021-11-13 18:35:55,756 INFO L226 Difference]: Without dead ends: 67
[2021-11-13 18:35:55,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72
[2021-11-13 18:35:55,758 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9798.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.93ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10416.47ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:35:55,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 189 Invalid, 98 Unknown, 0 Unchecked, 4.93ms Time], IncrementalHoareTripleChecker [17 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 10416.47ms Time]
[2021-11-13 18:35:55,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states.
[2021-11-13 18:35:55,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67.
[2021-11-13 18:35:55,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24)
[2021-11-13 18:35:55,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions.
[2021-11-13 18:35:55,778 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 23
[2021-11-13 18:35:55,779 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:35:55,779 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions.
[2021-11-13 18:35:55,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6)
[2021-11-13 18:35:55,780 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions.
[2021-11-13 18:35:55,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2021-11-13 18:35:55,781 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:35:55,782 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:35:55,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0
[2021-11-13 18:35:55,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3
[2021-11-13 18:35:55,998 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:35:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:35:55,999 INFO L85 PathProgramCache]: Analyzing trace with hash -680109588, now seen corresponding path program 1 times
[2021-11-13 18:35:55,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF
[2021-11-13 18:35:55,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951004209]
[2021-11-13 18:35:55,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:35:56,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2021-11-13 18:35:56,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat
[2021-11-13 18:35:56,001 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2021-11-13 18:35:56,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process
[2021-11-13 18:35:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:35:56,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core
[2021-11-13 18:35:56,293 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:35:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked.
[2021-11-13 18:35:56,730 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:36:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked.
[2021-11-13 18:36:02,840 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2021-11-13 18:36:02,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951004209]
[2021-11-13 18:36:02,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951004209] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-13 18:36:02,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2021-11-13 18:36:02,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10
[2021-11-13 18:36:02,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197821787]
[2021-11-13 18:36:02,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2021-11-13 18:36:02,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2021-11-13 18:36:02,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2021-11-13 18:36:02,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2021-11-13 18:36:02,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2021-11-13 18:36:02,843 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12)
[2021-11-13 18:36:07,977 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2021-11-13 18:36:10,019 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2021-11-13 18:36:16,084 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2021-11-13 18:36:18,158 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2021-11-13 18:36:21,029 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2021-11-13 18:36:25,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:36:25,646 INFO L93 Difference]: Finished difference Result 109 states and 150 transitions.
[2021-11-13 18:36:25,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2021-11-13 18:36:25,655 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 41
[2021-11-13 18:36:25,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:36:25,657 INFO L225 Difference]: With dead ends: 109
[2021-11-13 18:36:25,658 INFO L226 Difference]: Without dead ends: 107
[2021-11-13 18:36:25,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156
[2021-11-13 18:36:25,659 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 14 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 42 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19891.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.33ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20991.81ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:36:25,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 432 Invalid, 230 Unknown, 0 Unchecked, 11.33ms Time], IncrementalHoareTripleChecker [42 Valid, 183 Invalid, 5 Unknown, 0 Unchecked, 20991.81ms Time]
[2021-11-13 18:36:25,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states.
[2021-11-13 18:36:25,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 91.
[2021-11-13 18:36:25,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 47 states have (on average 1.148936170212766) internal successors, (54), 50 states have internal predecessors, (54), 33 states have call successors, (33), 10 states have call predecessors, (33), 10 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31)
[2021-11-13 18:36:25,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 118 transitions.
[2021-11-13 18:36:25,692 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 118 transitions. Word has length 41
[2021-11-13 18:36:25,692 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:36:25,692 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 118 transitions.
[2021-11-13 18:36:25,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12)
[2021-11-13 18:36:25,693 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 118 transitions.
[2021-11-13 18:36:25,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2021-11-13 18:36:25,694 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:36:25,695 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:36:25,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0
[2021-11-13 18:36:25,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3
[2021-11-13 18:36:25,908 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:36:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:36:25,909 INFO L85 PathProgramCache]: Analyzing trace with hash -399462631, now seen corresponding path program 2 times
[2021-11-13 18:36:25,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF
[2021-11-13 18:36:25,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912255269]
[2021-11-13 18:36:25,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2021-11-13 18:36:25,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2021-11-13 18:36:25,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat
[2021-11-13 18:36:25,910 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2021-11-13 18:36:25,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process
[2021-11-13 18:36:26,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2021-11-13 18:36:26,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2021-11-13 18:36:26,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core
[2021-11-13 18:36:26,211 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:36:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked.
[2021-11-13 18:36:26,604 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:36:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked.
[2021-11-13 18:36:37,749 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2021-11-13 18:36:37,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912255269]
[2021-11-13 18:36:37,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912255269] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-13 18:36:37,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2021-11-13 18:36:37,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10
[2021-11-13 18:36:37,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051220507]
[2021-11-13 18:36:37,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2021-11-13 18:36:37,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2021-11-13 18:36:37,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2021-11-13 18:36:37,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2021-11-13 18:36:37,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2021-11-13 18:36:37,751 INFO L87 Difference]: Start difference. First operand 91 states and 118 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14)
[2021-11-13 18:36:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:36:42,887 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions.
[2021-11-13 18:36:42,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2021-11-13 18:36:42,897 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 46
[2021-11-13 18:36:42,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:36:42,900 INFO L225 Difference]: With dead ends: 97
[2021-11-13 18:36:42,900 INFO L226 Difference]: Without dead ends: 95
[2021-11-13 18:36:42,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2021-11-13 18:36:42,902 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 7 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4247.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.61ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4723.95ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:36:42,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 339 Invalid, 121 Unknown, 0 Unchecked, 3.61ms Time], IncrementalHoareTripleChecker [7 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 4723.95ms Time]
[2021-11-13 18:36:42,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states.
[2021-11-13 18:36:42,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95.
[2021-11-13 18:36:42,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 50 states have (on average 1.14) internal successors, (57), 53 states have internal predecessors, (57), 33 states have call successors, (33), 11 states have call predecessors, (33), 11 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31)
[2021-11-13 18:36:42,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions.
[2021-11-13 18:36:42,923 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 46
[2021-11-13 18:36:42,923 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:36:42,923 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions.
[2021-11-13 18:36:42,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14)
[2021-11-13 18:36:42,925 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions.
[2021-11-13 18:36:42,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2021-11-13 18:36:42,927 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:36:42,927 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:36:42,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0
[2021-11-13 18:36:43,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3
[2021-11-13 18:36:43,128 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:36:43,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:36:43,128 INFO L85 PathProgramCache]: Analyzing trace with hash 616227619, now seen corresponding path program 1 times
[2021-11-13 18:36:43,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF
[2021-11-13 18:36:43,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359920281]
[2021-11-13 18:36:43,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:36:43,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2021-11-13 18:36:43,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat
[2021-11-13 18:36:43,131 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2021-11-13 18:36:43,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process
[2021-11-13 18:36:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:36:43,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core
[2021-11-13 18:36:43,664 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:36:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked.
[2021-11-13 18:36:44,525 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:37:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked.
[2021-11-13 18:37:25,543 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2021-11-13 18:37:25,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359920281]
[2021-11-13 18:37:25,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359920281] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-13 18:37:25,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2021-11-13 18:37:25,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12
[2021-11-13 18:37:25,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804196617]
[2021-11-13 18:37:25,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2021-11-13 18:37:25,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2021-11-13 18:37:25,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2021-11-13 18:37:25,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2021-11-13 18:37:25,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132
[2021-11-13 18:37:25,546 INFO L87 Difference]: Start difference. First operand 95 states and 121 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22)
[2021-11-13 18:37:29,704 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2021-11-13 18:37:31,708 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []
[2021-11-13 18:37:48,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:37:48,674 INFO L93 Difference]: Finished difference Result 113 states and 148 transitions.
[2021-11-13 18:37:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states.
[2021-11-13 18:37:48,704 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 67
[2021-11-13 18:37:48,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:37:48,706 INFO L225 Difference]: With dead ends: 113
[2021-11-13 18:37:48,706 INFO L226 Difference]: Without dead ends: 111
[2021-11-13 18:37:48,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210
[2021-11-13 18:37:48,707 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 19 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19400.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.07ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 20600.67ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:37:48,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 318 Invalid, 232 Unknown, 0 Unchecked, 6.07ms Time], IncrementalHoareTripleChecker [38 Valid, 172 Invalid, 1 Unknown, 21 Unchecked, 20600.67ms Time]
[2021-11-13 18:37:48,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states.
[2021-11-13 18:37:48,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 101.
[2021-11-13 18:37:48,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 57 states have internal predecessors, (60), 35 states have call successors, (35), 12 states have call predecessors, (35), 12 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33)
[2021-11-13 18:37:48,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 128 transitions.
[2021-11-13 18:37:48,737 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 128 transitions. Word has length 67
[2021-11-13 18:37:48,738 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:37:48,738 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 128 transitions.
[2021-11-13 18:37:48,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22)
[2021-11-13 18:37:48,739 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 128 transitions.
[2021-11-13 18:37:48,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70
[2021-11-13 18:37:48,741 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:37:48,741 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:37:48,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0
[2021-11-13 18:37:48,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3
[2021-11-13 18:37:48,965 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:37:48,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:37:48,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1946665570, now seen corresponding path program 1 times
[2021-11-13 18:37:48,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF
[2021-11-13 18:37:48,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119984669]
[2021-11-13 18:37:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:37:48,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2021-11-13 18:37:48,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat
[2021-11-13 18:37:48,967 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2021-11-13 18:37:48,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process
[2021-11-13 18:37:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:37:49,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core
[2021-11-13 18:37:49,539 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:37:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 60 proven. 112 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked.
[2021-11-13 18:37:50,036 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:37:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked.
[2021-11-13 18:37:50,354 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2021-11-13 18:37:50,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119984669]
[2021-11-13 18:37:50,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119984669] provided 0 perfect and 2 imperfect interpolant sequences
[2021-11-13 18:37:50,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2021-11-13 18:37:50,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10
[2021-11-13 18:37:50,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741116838]
[2021-11-13 18:37:50,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2021-11-13 18:37:50,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2021-11-13 18:37:50,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF
[2021-11-13 18:37:50,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2021-11-13 18:37:50,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90
[2021-11-13 18:37:50,357 INFO L87 Difference]: Start difference. First operand 101 states and 128 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22)
[2021-11-13 18:38:05,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-11-13 18:38:05,244 INFO L93 Difference]: Finished difference Result 195 states and 240 transitions.
[2021-11-13 18:38:05,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states.
[2021-11-13 18:38:05,255 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 69
[2021-11-13 18:38:05,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-11-13 18:38:05,257 INFO L225 Difference]: With dead ends: 195
[2021-11-13 18:38:05,257 INFO L226 Difference]: Without dead ends: 179
[2021-11-13 18:38:05,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272
[2021-11-13 18:38:05,259 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 88 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13524.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.41ms SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14587.47ms IncrementalHoareTripleChecker+Time
[2021-11-13 18:38:05,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 277 Invalid, 386 Unknown, 0 Unchecked, 5.41ms Time], IncrementalHoareTripleChecker [142 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 14587.47ms Time]
[2021-11-13 18:38:05,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states.
[2021-11-13 18:38:05,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 171.
[2021-11-13 18:38:05,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 89 states have (on average 1.1235955056179776) internal successors, (100), 94 states have internal predecessors, (100), 59 states have call successors, (59), 22 states have call predecessors, (59), 22 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54)
[2021-11-13 18:38:05,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 213 transitions.
[2021-11-13 18:38:05,294 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 213 transitions. Word has length 69
[2021-11-13 18:38:05,294 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-11-13 18:38:05,294 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 213 transitions.
[2021-11-13 18:38:05,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22)
[2021-11-13 18:38:05,295 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 213 transitions.
[2021-11-13 18:38:05,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73
[2021-11-13 18:38:05,297 INFO L506 BasicCegarLoop]: Found error trace
[2021-11-13 18:38:05,297 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:38:05,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0
[2021-11-13 18:38:05,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3
[2021-11-13 18:38:05,523 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2021-11-13 18:38:05,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-11-13 18:38:05,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1808123650, now seen corresponding path program 1 times
[2021-11-13 18:38:05,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF
[2021-11-13 18:38:05,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1835966601]
[2021-11-13 18:38:05,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:38:05,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3
[2021-11-13 18:38:05,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat
[2021-11-13 18:38:05,525 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null)
[2021-11-13 18:38:05,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process
[2021-11-13 18:38:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:38:06,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core
[2021-11-13 18:38:06,051 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:38:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked.
[2021-11-13 18:38:09,851 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2021-11-13 18:39:51,836 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_57| (_ BitVec 64)) (|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_15| (_ BitVec 16)) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_63| (_ BitVec 64)) (|v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_55| (_ BitVec 64))) (let ((.cse4 ((_ sign_extend 16) |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_15|))) (let ((.cse1 ((_ sign_extend 32) (bvmul .cse4 (_ bv6 32))))) (or (let ((.cse0 (= (bvadd (bvmul .cse1 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_63|) (bvmul (_ bv12 64) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_63|) (bvneg (bvmul |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_63| |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_55|))) (_ bv0 64)))) (and (or .cse0 (not (= |c___VERIFIER_assert_#in~cond| (_ bv0 32)))) (or (not .cse0) (not (= (_ bv1 32) |c___VERIFIER_assert_#in~cond|))))) (exists ((|ULTIMATE.start_main_~a~0#1| (_ BitVec 16))) (let ((.cse3 ((_ sign_extend 16) |ULTIMATE.start_main_~a~0#1|))) (let ((.cse2 ((_ sign_extend 32) (bvmul .cse3 (_ bv6 32))))) (and (= (_ bv0 64) (bvadd (bvmul (_ bv12 64) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_63|) (bvneg (bvmul |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_63| |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_55|)) (bvmul .cse2 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_63|))) (not (= (_ bv10 64) (bvadd (bvmul ((_ sign_extend 32) .cse3) |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_55|) (bvneg (bvmul |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_57| (_ bv2 64))) (bvmul (_ bv2 64) |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_55|) (bvneg .cse2)))))))) (= (_ bv10 64) (bvadd (bvmul ((_ sign_extend 32) .cse4) |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_55|) (bvneg (bvmul |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_57| (_ bv2 64))) (bvmul (_ bv2 64) |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_55|) (bvneg .cse1))))))) is different from false
[2021-11-13 18:46:03,630 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory")
[2021-11-13 18:46:03,634 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace
[2021-11-13 18:46:03,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1835966601]
[2021-11-13 18:46:03,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory")
[2021-11-13 18:46:03,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [422978417]
[2021-11-13 18:46:03,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:46:03,635 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt
[2021-11-13 18:46:03,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/cvc4
[2021-11-13 18:46:03,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101
[2021-11-13 18:46:03,638 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null)
[2021-11-13 18:46:03,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process
[2021-11-13 18:46:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:46:05,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core
[2021-11-13 18:46:05,200 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:46:05,210 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken
[2021-11-13 18:46:05,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843176956]
[2021-11-13 18:46:05,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-11-13 18:46:05,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:46:05,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3
[2021-11-13 18:46:05,213 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2021-11-13 18:46:05,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2021-11-13 18:46:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-11-13 18:46:05,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core
[2021-11-13 18:46:05,797 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2021-11-13 18:46:05,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken
[2021-11-13 18:46:05,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences.
[2021-11-13 18:46:05,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0
[2021-11-13 18:46:05,798 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible
[2021-11-13 18:46:05,798 INFO L628 BasicCegarLoop]: Counterexample might be feasible
[2021-11-13 18:46:05,806 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2021-11-13 18:46:05,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0
[2021-11-13 18:46:06,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0
[2021-11-13 18:46:06,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0
[2021-11-13 18:46:06,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d67a2b5-d5bb-4b72-9ac5-e2c4ed6c45aa/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2021-11-13 18:46:06,424 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-11-13 18:46:06,426 INFO L179 ceAbstractionStarter]: Computing trace abstraction results
[2021-11-13 18:46:06,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 06:46:06 BoogieIcfgContainer
[2021-11-13 18:46:06,446 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-11-13 18:46:06,447 INFO L113 PluginConnector]: ------------------------Witness Printer----------------------------
[2021-11-13 18:46:06,447 INFO L271 PluginConnector]: Initializing Witness Printer...
[2021-11-13 18:46:06,448 INFO L275 PluginConnector]: Witness Printer initialized
[2021-11-13 18:46:06,448 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:35:19" (3/4) ...
[2021-11-13 18:46:06,452 INFO L140 WitnessPrinter]: No result that supports witness generation found
[2021-11-13 18:46:06,452 INFO L132 PluginConnector]: ------------------------ END Witness Printer----------------------------
[2021-11-13 18:46:06,453 INFO L158 Benchmark]: Toolchain (without parser) took 648233.61ms. Allocated memory was 73.4MB in the beginning and 107.0MB in the end (delta: 33.6MB). Free memory was 54.7MB in the beginning and 29.7MB in the end (delta: 25.0MB). Peak memory consumption was 58.9MB. Max. memory is 16.1GB.
[2021-11-13 18:46:06,454 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 73.4MB. Free memory was 53.6MB in the beginning and 53.5MB in the end (delta: 95.9kB). There was no memory consumed. Max. memory is 16.1GB.
[2021-11-13 18:46:06,454 INFO L158 Benchmark]: CACSL2BoogieTranslator took 340.99ms. Allocated memory is still 73.4MB. Free memory was 54.5MB in the beginning and 54.2MB in the end (delta: 261.1kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB.
[2021-11-13 18:46:06,455 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.36ms. Allocated memory is still 73.4MB. Free memory was 54.2MB in the beginning and 52.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
[2021-11-13 18:46:06,455 INFO L158 Benchmark]: Boogie Preprocessor took 53.41ms. Allocated memory is still 73.4MB. Free memory was 52.4MB in the beginning and 51.5MB in the end (delta: 964.7kB). There was no memory consumed. Max. memory is 16.1GB.
[2021-11-13 18:46:06,456 INFO L158 Benchmark]: RCFGBuilder took 445.80ms. Allocated memory is still 73.4MB. Free memory was 51.2MB in the beginning and 39.8MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB.
[2021-11-13 18:46:06,457 INFO L158 Benchmark]: TraceAbstraction took 647320.45ms. Allocated memory was 73.4MB in the beginning and 107.0MB in the end (delta: 33.6MB). Free memory was 39.5MB in the beginning and 29.7MB in the end (delta: 9.8MB). Peak memory consumption was 45.7MB. Max. memory is 16.1GB.
[2021-11-13 18:46:06,457 INFO L158 Benchmark]: Witness Printer took 5.05ms. Allocated memory is still 107.0MB. Free memory is still 29.7MB. There was no memory consumed. Max. memory is 16.1GB.
[2021-11-13 18:46:06,460 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.28ms. Allocated memory is still 73.4MB. Free memory was 53.6MB in the beginning and 53.5MB in the end (delta: 95.9kB). There was no memory consumed. Max. memory is 16.1GB.
* CACSL2BoogieTranslator took 340.99ms. Allocated memory is still 73.4MB. Free memory was 54.5MB in the beginning and 54.2MB in the end (delta: 261.1kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB.
* Boogie Procedure Inliner took 60.36ms. Allocated memory is still 73.4MB. Free memory was 54.2MB in the beginning and 52.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
* Boogie Preprocessor took 53.41ms. Allocated memory is still 73.4MB. Free memory was 52.4MB in the beginning and 51.5MB in the end (delta: 964.7kB). There was no memory consumed. Max. memory is 16.1GB.
* RCFGBuilder took 445.80ms. Allocated memory is still 73.4MB. Free memory was 51.2MB in the beginning and 39.8MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB.
* TraceAbstraction took 647320.45ms. Allocated memory was 73.4MB in the beginning and 107.0MB in the end (delta: 33.6MB). Free memory was 39.5MB in the beginning and 29.7MB in the end (delta: 9.8MB). Peak memory consumption was 45.7MB. Max. memory is 16.1GB.
* Witness Printer took 5.05ms. Allocated memory is still 107.0MB. Free memory is still 29.7MB. There was no memory consumed. Max. memory is 16.1GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- StatisticsResult: ErrorAutomatonStatistics
NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0
- UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable
Unable to prove that call to reach_error is unreachable
Reason: unable to decide satisfiability of path constraint.
Possible FailurePath:
[L22] int counter = 0;
[L24] short a;
[L25] long long n, x, y, z;
[L26] a = __VERIFIER_nondet_ushort()
[L28] n = 0
[L29] x = 0
[L30] y = 1
[L31] z = 6
[L33] EXPR counter++
[L33] COND TRUE counter++<20
[L34] CALL __VERIFIER_assert(z == 6 * n + 6)
[L15] COND FALSE !(!(cond))
[L34] RET __VERIFIER_assert(z == 6 * n + 6)
[L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1)
[L15] COND FALSE !(!(cond))
[L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1)
[L36] CALL __VERIFIER_assert(x == n * n * n)
[L15] COND FALSE !(!(cond))
[L36] RET __VERIFIER_assert(x == n * n * n)
[L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0)
[L15] COND FALSE !(!(cond))
[L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0)
[L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0)
[L15] COND FALSE !(!(cond))
[L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0)
[L39] COND FALSE !(!(n <= a))
[L42] n = n + 1
[L43] x = x + y
[L44] y = y + z
[L45] z = z + 6
[L33] EXPR counter++
[L33] COND TRUE counter++<20
[L34] CALL __VERIFIER_assert(z == 6 * n + 6)
[L15] COND FALSE !(!(cond))
[L34] RET __VERIFIER_assert(z == 6 * n + 6)
[L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1)
[L15] COND FALSE !(!(cond))
[L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1)
[L36] CALL __VERIFIER_assert(x == n * n * n)
[L15] COND FALSE !(!(cond))
[L36] RET __VERIFIER_assert(x == n * n * n)
[L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0)
[L15] COND FALSE !(!(cond))
[L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0)
[L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0)
[L15] COND FALSE !(!(cond))
[L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0)
[L39] COND TRUE !(n <= a)
[L48] CALL __VERIFIER_assert(z == 6*n + 6)
[L15] COND FALSE !(!(cond))
[L48] RET __VERIFIER_assert(z == 6*n + 6)
[L49] CALL __VERIFIER_assert(6*a*x - x*z + 12*x == 0)
[L15] COND FALSE !(!(cond))
[L49] RET __VERIFIER_assert(6*a*x - x*z + 12*x == 0)
[L50] CALL __VERIFIER_assert(a*z - 6*a - 2*y + 2*z - 10 == 0)
[L15] COND TRUE !(cond)
[L17] reach_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 2 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 647.2s, OverallIterations: 11, TraceHistogramMax: 13, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 88.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 6 mSolverCounterUnknown, 271 SdHoareTripleChecker+Valid, 81792.02ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 195 mSDsluCounter, 2206 SdHoareTripleChecker+Invalid, 76433.82ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 21 IncrementalHoareTripleChecker+Unchecked, 1702 mSDsCounter, 266 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 966 IncrementalHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 266 mSolverCounterUnsat, 504 mSDtfsCounter, 966 mSolverCounterSat, 51.68ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 601 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 30.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=171occurred in iteration=10, InterpolantAutomatonStates: 76, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 10 MinimizatonAttempts, 36 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 550.9s InterpolantComputationTime, 372 NumberOfCodeBlocks, 372 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 651 ConstructedInterpolants, 8 QuantifiedInterpolants, 2833 SizeOfPredicates, 14 NumberOfNonLiveVariables, 804 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 21 InterpolantComputations, 12 PerfectInterpolantSequences, 1551/1718 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces
Received shutdown request...
--- End real Ultimate output ---
Execution finished normally
Writing output log to file Ultimate.log
Result:
UNKNOWN