./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c --full-output --architecture 32bit
--------------------------------------------------------------------------------
Checking for ERROR reachability
Using default analysis
Version 5e519f3a
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc --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 173419c809fa8cb7fa094fdfc7b5765802a9a2fdebfe9d0a53cd745fd0c573d2
--- Real Ultimate output ---
[0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset.
This is Ultimate 0.2.2-dev-5e519f3
[2022-11-02 20:44:56,121 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2022-11-02 20:44:56,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2022-11-02 20:44:56,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-11-02 20:44:56,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-11-02 20:44:56,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-11-02 20:44:56,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-11-02 20:44:56,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2022-11-02 20:44:56,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-11-02 20:44:56,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-11-02 20:44:56,210 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2022-11-02 20:44:56,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-11-02 20:44:56,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-11-02 20:44:56,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-11-02 20:44:56,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-11-02 20:44:56,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-11-02 20:44:56,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-11-02 20:44:56,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-11-02 20:44:56,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-11-02 20:44:56,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2022-11-02 20:44:56,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-11-02 20:44:56,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-11-02 20:44:56,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2022-11-02 20:44:56,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-11-02 20:44:56,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-11-02 20:44:56,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-11-02 20:44:56,259 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-11-02 20:44:56,261 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-11-02 20:44:56,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-11-02 20:44:56,263 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-11-02 20:44:56,265 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-11-02 20:44:56,267 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-11-02 20:44:56,269 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-11-02 20:44:56,271 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2022-11-02 20:44:56,273 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-11-02 20:44:56,273 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2022-11-02 20:44:56,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-11-02 20:44:56,275 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-11-02 20:44:56,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2022-11-02 20:44:56,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2022-11-02 20:44:56,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2022-11-02 20:44:56,279 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf
[2022-11-02 20:44:56,332 INFO L113 SettingsManager]: Loading preferences was successful
[2022-11-02 20:44:56,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2022-11-02 20:44:56,334 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-11-02 20:44:56,334 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-11-02 20:44:56,336 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-11-02 20:44:56,336 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-11-02 20:44:56,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-11-02 20:44:56,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2022-11-02 20:44:56,338 INFO L138 SettingsManager]: * Use SBE=true
[2022-11-02 20:44:56,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-11-02 20:44:56,340 INFO L138 SettingsManager]: * sizeof long=4
[2022-11-02 20:44:56,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2022-11-02 20:44:56,341 INFO L138 SettingsManager]: * sizeof POINTER=4
[2022-11-02 20:44:56,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2022-11-02 20:44:56,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2022-11-02 20:44:56,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-11-02 20:44:56,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2022-11-02 20:44:56,342 INFO L138 SettingsManager]: * sizeof long double=12
[2022-11-02 20:44:56,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2022-11-02 20:44:56,343 INFO L138 SettingsManager]: * Use constant arrays=true
[2022-11-02 20:44:56,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2022-11-02 20:44:56,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-11-02 20:44:56,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2022-11-02 20:44:56,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2022-11-02 20:44:56,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-02 20:44:56,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-11-02 20:44:56,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2022-11-02 20:44:56,346 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-11-02 20:44:56,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2022-11-02 20:44:56,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-11-02 20:44:56,347 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false
[2022-11-02 20:44:56,348 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET
[2022-11-02 20:44:56,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-11-02 20:44:56,349 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_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 173419c809fa8cb7fa094fdfc7b5765802a9a2fdebfe9d0a53cd745fd0c573d2
[2022-11-02 20:44:56,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2022-11-02 20:44:56,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-11-02 20:44:56,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-11-02 20:44:56,770 INFO L271 PluginConnector]: Initializing CDTParser...
[2022-11-02 20:44:56,771 INFO L275 PluginConnector]: CDTParser initialized
[2022-11-02 20:44:56,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c
[2022-11-02 20:44:56,886 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/data/90fab49a1/91c999e0bf6e4353bd42250fd85bdbef/FLAG402434e53
[2022-11-02 20:44:57,429 INFO L306 CDTParser]: Found 1 translation units.
[2022-11-02 20:44:57,429 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c
[2022-11-02 20:44:57,438 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/data/90fab49a1/91c999e0bf6e4353bd42250fd85bdbef/FLAG402434e53
[2022-11-02 20:44:57,791 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/data/90fab49a1/91c999e0bf6e4353bd42250fd85bdbef
[2022-11-02 20:44:57,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-11-02 20:44:57,795 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements.
[2022-11-02 20:44:57,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-11-02 20:44:57,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-11-02 20:44:57,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2022-11-02 20:44:57,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:44:57" (1/1) ...
[2022-11-02 20:44:57,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71de9b0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:57, skipping insertion in model container
[2022-11-02 20:44:57,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:44:57" (1/1) ...
[2022-11-02 20:44:57,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2022-11-02 20:44:57,850 INFO L178 MainTranslator]: Built tables and reachable declarations
[2022-11-02 20:44:58,104 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c[588,601]
[2022-11-02 20:44:58,155 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-11-02 20:44:58,171 INFO L203 MainTranslator]: Completed pre-run
[2022-11-02 20:44:58,192 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound5.c[588,601]
[2022-11-02 20:44:58,224 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-11-02 20:44:58,246 INFO L208 MainTranslator]: Completed translation
[2022-11-02 20:44:58,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:58 WrapperNode
[2022-11-02 20:44:58,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-11-02 20:44:58,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-11-02 20:44:58,249 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-11-02 20:44:58,249 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized
[2022-11-02 20:44:58,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:58" (1/1) ...
[2022-11-02 20:44:58,287 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:58" (1/1) ...
[2022-11-02 20:44:58,319 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49
[2022-11-02 20:44:58,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-11-02 20:44:58,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-11-02 20:44:58,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2022-11-02 20:44:58,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2022-11-02 20:44:58,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:58" (1/1) ...
[2022-11-02 20:44:58,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:58" (1/1) ...
[2022-11-02 20:44:58,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:58" (1/1) ...
[2022-11-02 20:44:58,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:58" (1/1) ...
[2022-11-02 20:44:58,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:58" (1/1) ...
[2022-11-02 20:44:58,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:58" (1/1) ...
[2022-11-02 20:44:58,371 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:58" (1/1) ...
[2022-11-02 20:44:58,373 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:58" (1/1) ...
[2022-11-02 20:44:58,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-11-02 20:44:58,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-11-02 20:44:58,380 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2022-11-02 20:44:58,380 INFO L275 PluginConnector]: RCFGBuilder initialized
[2022-11-02 20:44:58,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:58" (1/1) ...
[2022-11-02 20:44:58,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-02 20:44:58,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:44:58,426 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-11-02 20:44:58,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-11-02 20:44:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-11-02 20:44:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2022-11-02 20:44:58,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-11-02 20:44:58,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-11-02 20:44:58,478 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2022-11-02 20:44:58,478 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2022-11-02 20:44:58,573 INFO L235 CfgBuilder]: Building ICFG
[2022-11-02 20:44:58,576 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation
[2022-11-02 20:44:58,915 INFO L276 CfgBuilder]: Performing block encoding
[2022-11-02 20:44:58,923 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-11-02 20:44:58,923 INFO L300 CfgBuilder]: Removed 1 assume(true) statements.
[2022-11-02 20:44:58,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:44:58 BoogieIcfgContainer
[2022-11-02 20:44:58,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-11-02 20:44:58,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-11-02 20:44:58,928 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2022-11-02 20:44:58,948 INFO L275 PluginConnector]: TraceAbstraction initialized
[2022-11-02 20:44:58,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:44:57" (1/3) ...
[2022-11-02 20:44:58,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651f3c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:44:58, skipping insertion in model container
[2022-11-02 20:44:58,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:58" (2/3) ...
[2022-11-02 20:44:58,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651f3c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:44:58, skipping insertion in model container
[2022-11-02 20:44:58,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:44:58" (3/3) ...
[2022-11-02 20:44:58,951 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound5.c
[2022-11-02 20:44:58,996 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-11-02 20:44:58,997 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-11-02 20:44:59,096 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-11-02 20:44:59,109 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@72cb5d64, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2022-11-02 20:44:59,109 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2022-11-02 20:44:59,114 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)
[2022-11-02 20:44:59,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2022-11-02 20:44:59,125 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-02 20:44:59,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2022-11-02 20:44:59,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:44:59,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:44:59,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1823967074, now seen corresponding path program 1 times
[2022-11-02 20:44:59,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:44:59,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708470440]
[2022-11-02 20:44:59,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:44:59,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:44:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:44:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-02 20:44:59,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:44:59,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708470440]
[2022-11-02 20:44:59,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708470440] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:44:59,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:44:59,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-11-02 20:44:59,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951883650]
[2022-11-02 20:44:59,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:44:59,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-11-02 20:44:59,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:44:59,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-11-02 20:44:59,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-11-02 20:44:59,438 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)
[2022-11-02 20:44:59,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:44:59,497 INFO L93 Difference]: Finished difference Result 50 states and 87 transitions.
[2022-11-02 20:44:59,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states.
[2022-11-02 20:44:59,502 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
[2022-11-02 20:44:59,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:44:59,514 INFO L225 Difference]: With dead ends: 50
[2022-11-02 20:44:59,515 INFO L226 Difference]: Without dead ends: 22
[2022-11-02 20:44:59,521 INFO L412 NwaCegarLoop]: 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
[2022-11-02 20:44:59,537 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-11-02 20:44:59,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-11-02 20:44:59,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states.
[2022-11-02 20:44:59,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22.
[2022-11-02 20:44:59,600 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)
[2022-11-02 20:44:59,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions.
[2022-11-02 20:44:59,604 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7
[2022-11-02 20:44:59,605 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:44:59,605 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions.
[2022-11-02 20:44:59,606 INFO L496 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)
[2022-11-02 20:44:59,606 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions.
[2022-11-02 20:44:59,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2022-11-02 20:44:59,607 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-02 20:44:59,607 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-02 20:44:59,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-11-02 20:44:59,608 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:44:59,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:44:59,609 INFO L85 PathProgramCache]: Analyzing trace with hash 178926099, now seen corresponding path program 1 times
[2022-11-02 20:44:59,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:44:59,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140341955]
[2022-11-02 20:44:59,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:44:59,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:44:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:44:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-02 20:44:59,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:44:59,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140341955]
[2022-11-02 20:44:59,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140341955] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:44:59,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:44:59,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-02 20:44:59,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833628872]
[2022-11-02 20:44:59,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:44:59,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2022-11-02 20:44:59,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:44:59,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2022-11-02 20:44:59,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2022-11-02 20:44:59,804 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)
[2022-11-02 20:44:59,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:44:59,835 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions.
[2022-11-02 20:44:59,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2022-11-02 20:44:59,836 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
[2022-11-02 20:44:59,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:44:59,837 INFO L225 Difference]: With dead ends: 36
[2022-11-02 20:44:59,837 INFO L226 Difference]: Without dead ends: 24
[2022-11-02 20:44:59,838 INFO L412 NwaCegarLoop]: 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
[2022-11-02 20:44:59,840 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2022-11-02 20:44:59,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2022-11-02 20:44:59,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states.
[2022-11-02 20:44:59,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24.
[2022-11-02 20:44:59,850 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)
[2022-11-02 20:44:59,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions.
[2022-11-02 20:44:59,853 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 8
[2022-11-02 20:44:59,853 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:44:59,853 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions.
[2022-11-02 20:44:59,854 INFO L496 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)
[2022-11-02 20:44:59,854 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions.
[2022-11-02 20:44:59,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2022-11-02 20:44:59,855 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-02 20:44:59,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-02 20:44:59,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-11-02 20:44:59,867 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:44:59,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:44:59,868 INFO L85 PathProgramCache]: Analyzing trace with hash 180475231, now seen corresponding path program 1 times
[2022-11-02 20:44:59,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:44:59,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684309968]
[2022-11-02 20:44:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:44:59,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:44:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:45:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-02 20:45:00,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:45:00,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684309968]
[2022-11-02 20:45:00,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684309968] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:45:00,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:45:00,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-02 20:45:00,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937662257]
[2022-11-02 20:45:00,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:45:00,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-02 20:45:00,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:45:00,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-02 20:45:00,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:45:00,271 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)
[2022-11-02 20:45:00,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:45:00,445 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions.
[2022-11-02 20:45:00,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2022-11-02 20:45:00,446 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
[2022-11-02 20:45:00,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:45:00,450 INFO L225 Difference]: With dead ends: 30
[2022-11-02 20:45:00,451 INFO L226 Difference]: Without dead ends: 28
[2022-11-02 20:45:00,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2022-11-02 20:45:00,459 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-11-02 20:45:00,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 62 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-11-02 20:45:00,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2022-11-02 20:45:00,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2022-11-02 20:45:00,488 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)
[2022-11-02 20:45:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions.
[2022-11-02 20:45:00,495 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 8
[2022-11-02 20:45:00,495 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:45:00,496 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions.
[2022-11-02 20:45:00,496 INFO L496 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)
[2022-11-02 20:45:00,496 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions.
[2022-11-02 20:45:00,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2022-11-02 20:45:00,498 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-02 20:45:00,499 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-02 20:45:00,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2022-11-02 20:45:00,500 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:45:00,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:45:00,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1275442234, now seen corresponding path program 1 times
[2022-11-02 20:45:00,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:45:00,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192964809]
[2022-11-02 20:45:00,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:00,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:45:00,534 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:45:00,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467010712]
[2022-11-02 20:45:00,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:00,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:00,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:45:00,544 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:45:00,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-11-02 20:45:00,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:45:00,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-11-02 20:45:00,627 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:45:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-02 20:45:00,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-02 20:45:00,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:45:00,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192964809]
[2022-11-02 20:45:00,788 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:45:00,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467010712]
[2022-11-02 20:45:00,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467010712] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:45:00,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:45:00,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-02 20:45:00,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772581170]
[2022-11-02 20:45:00,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:45:00,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-02 20:45:00,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:45:00,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-02 20:45:00,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:45:00,797 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)
[2022-11-02 20:45:00,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:45:00,958 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions.
[2022-11-02 20:45:00,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2022-11-02 20:45:00,959 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
[2022-11-02 20:45:00,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:45:00,961 INFO L225 Difference]: With dead ends: 46
[2022-11-02 20:45:00,962 INFO L226 Difference]: Without dead ends: 44
[2022-11-02 20:45:00,963 INFO L412 NwaCegarLoop]: 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
[2022-11-02 20:45:00,965 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-11-02 20:45:00,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 121 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-11-02 20:45:00,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states.
[2022-11-02 20:45:00,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34.
[2022-11-02 20:45:00,991 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)
[2022-11-02 20:45:00,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions.
[2022-11-02 20:45:01,000 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 13
[2022-11-02 20:45:01,001 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:45:01,002 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions.
[2022-11-02 20:45:01,002 INFO L496 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)
[2022-11-02 20:45:01,002 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions.
[2022-11-02 20:45:01,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2022-11-02 20:45:01,004 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-02 20:45:01,004 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-02 20:45:01,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-11-02 20:45:01,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:01,219 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:45:01,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:45:01,220 INFO L85 PathProgramCache]: Analyzing trace with hash 427545983, now seen corresponding path program 1 times
[2022-11-02 20:45:01,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:45:01,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574754921]
[2022-11-02 20:45:01,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:01,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:45:01,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:45:01,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602548487]
[2022-11-02 20:45:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:01,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:01,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:45:01,248 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:45:01,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-11-02 20:45:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:45:01,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core
[2022-11-02 20:45:01,326 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:45:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2022-11-02 20:45:01,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-02 20:45:01,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:45:01,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574754921]
[2022-11-02 20:45:01,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:45:01,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602548487]
[2022-11-02 20:45:01,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602548487] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:45:01,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:45:01,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-02 20:45:01,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67713767]
[2022-11-02 20:45:01,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:45:01,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-02 20:45:01,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:45:01,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-02 20:45:01,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:45:01,447 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)
[2022-11-02 20:45:01,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:45:01,569 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions.
[2022-11-02 20:45:01,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2022-11-02 20:45:01,570 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
[2022-11-02 20:45:01,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:45:01,574 INFO L225 Difference]: With dead ends: 50
[2022-11-02 20:45:01,574 INFO L226 Difference]: Without dead ends: 48
[2022-11-02 20:45:01,575 INFO L412 NwaCegarLoop]: 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
[2022-11-02 20:45:01,577 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-11-02 20:45:01,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 125 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-11-02 20:45:01,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states.
[2022-11-02 20:45:01,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44.
[2022-11-02 20:45:01,607 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)
[2022-11-02 20:45:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions.
[2022-11-02 20:45:01,610 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 18
[2022-11-02 20:45:01,610 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:45:01,610 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions.
[2022-11-02 20:45:01,611 INFO L496 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)
[2022-11-02 20:45:01,611 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions.
[2022-11-02 20:45:01,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2022-11-02 20:45:01,613 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-02 20:45:01,613 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-02 20:45:01,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2022-11-02 20:45:01,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:01,831 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:45:01,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:45:01,832 INFO L85 PathProgramCache]: Analyzing trace with hash 5607206, now seen corresponding path program 1 times
[2022-11-02 20:45:01,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:45:01,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256532246]
[2022-11-02 20:45:01,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:01,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:45:01,845 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:45:01,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949416832]
[2022-11-02 20:45:01,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:01,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:01,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:45:01,855 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:45:01,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-11-02 20:45:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:45:01,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core
[2022-11-02 20:45:01,923 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:45:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2022-11-02 20:45:02,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2022-11-02 20:45:02,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:45:02,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256532246]
[2022-11-02 20:45:02,045 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:45:02,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949416832]
[2022-11-02 20:45:02,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949416832] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:45:02,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:45:02,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2022-11-02 20:45:02,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627104584]
[2022-11-02 20:45:02,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:45:02,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2022-11-02 20:45:02,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:45:02,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2022-11-02 20:45:02,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2022-11-02 20:45:02,048 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)
[2022-11-02 20:45:02,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:45:02,171 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions.
[2022-11-02 20:45:02,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2022-11-02 20:45:02,172 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
[2022-11-02 20:45:02,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:45:02,173 INFO L225 Difference]: With dead ends: 58
[2022-11-02 20:45:02,173 INFO L226 Difference]: Without dead ends: 46
[2022-11-02 20:45:02,174 INFO L412 NwaCegarLoop]: 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
[2022-11-02 20:45:02,175 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-11-02 20:45:02,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 114 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-11-02 20:45:02,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states.
[2022-11-02 20:45:02,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46.
[2022-11-02 20:45:02,188 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)
[2022-11-02 20:45:02,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions.
[2022-11-02 20:45:02,189 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 23
[2022-11-02 20:45:02,189 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:45:02,189 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions.
[2022-11-02 20:45:02,190 INFO L496 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)
[2022-11-02 20:45:02,190 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions.
[2022-11-02 20:45:02,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2022-11-02 20:45:02,191 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-02 20:45:02,191 INFO L195 NwaCegarLoop]: 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]
[2022-11-02 20:45:02,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-11-02 20:45:02,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2022-11-02 20:45:02,420 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:45:02,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:45:02,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1172224904, now seen corresponding path program 1 times
[2022-11-02 20:45:02,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:45:02,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644340993]
[2022-11-02 20:45:02,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:02,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:45:02,437 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:45:02,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112993335]
[2022-11-02 20:45:02,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:02,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:02,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:45:02,441 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:45:02,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-11-02 20:45:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:45:02,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core
[2022-11-02 20:45:02,534 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:45:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked.
[2022-11-02 20:45:02,639 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-02 20:45:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked.
[2022-11-02 20:45:02,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:45:02,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644340993]
[2022-11-02 20:45:02,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:45:02,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112993335]
[2022-11-02 20:45:02,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112993335] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-02 20:45:02,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-11-02 20:45:02,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8
[2022-11-02 20:45:02,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267924739]
[2022-11-02 20:45:02,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-11-02 20:45:02,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-11-02 20:45:02,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:45:02,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-11-02 20:45:02,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2022-11-02 20:45:02,736 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)
[2022-11-02 20:45:03,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:45:03,022 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions.
[2022-11-02 20:45:03,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2022-11-02 20:45:03,024 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
[2022-11-02 20:45:03,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:45:03,032 INFO L225 Difference]: With dead ends: 116
[2022-11-02 20:45:03,033 INFO L226 Difference]: Without dead ends: 100
[2022-11-02 20:45:03,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110
[2022-11-02 20:45:03,037 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 65 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-11-02 20:45:03,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 225 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-11-02 20:45:03,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states.
[2022-11-02 20:45:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96.
[2022-11-02 20:45:03,073 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)
[2022-11-02 20:45:03,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 127 transitions.
[2022-11-02 20:45:03,080 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 127 transitions. Word has length 41
[2022-11-02 20:45:03,080 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:45:03,080 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 127 transitions.
[2022-11-02 20:45:03,081 INFO L496 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)
[2022-11-02 20:45:03,081 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 127 transitions.
[2022-11-02 20:45:03,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2022-11-02 20:45:03,082 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-02 20:45:03,082 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-02 20:45:03,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0
[2022-11-02 20:45:03,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:03,283 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:45:03,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:45:03,284 INFO L85 PathProgramCache]: Analyzing trace with hash -680109588, now seen corresponding path program 1 times
[2022-11-02 20:45:03,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:45:03,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328995113]
[2022-11-02 20:45:03,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:03,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:45:03,296 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:45:03,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651685741]
[2022-11-02 20:45:03,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:03,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:03,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:45:03,298 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:45:03,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2022-11-02 20:45:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:45:03,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-11-02 20:45:03,370 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:45:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked.
[2022-11-02 20:45:03,554 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-02 20:45:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked.
[2022-11-02 20:45:03,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:45:03,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328995113]
[2022-11-02 20:45:03,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:45:03,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651685741]
[2022-11-02 20:45:03,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651685741] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-02 20:45:03,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-11-02 20:45:03,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8
[2022-11-02 20:45:03,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921579084]
[2022-11-02 20:45:03,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-11-02 20:45:03,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-11-02 20:45:03,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:45:03,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-11-02 20:45:03,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2022-11-02 20:45:03,718 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)
[2022-11-02 20:45:04,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:45:04,318 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions.
[2022-11-02 20:45:04,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2022-11-02 20:45:04,319 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
[2022-11-02 20:45:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:45:04,320 INFO L225 Difference]: With dead ends: 114
[2022-11-02 20:45:04,320 INFO L226 Difference]: Without dead ends: 112
[2022-11-02 20:45:04,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110
[2022-11-02 20:45:04,322 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2022-11-02 20:45:04,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 96 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2022-11-02 20:45:04,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states.
[2022-11-02 20:45:04,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112.
[2022-11-02 20:45:04,378 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)
[2022-11-02 20:45:04,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 139 transitions.
[2022-11-02 20:45:04,380 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 139 transitions. Word has length 41
[2022-11-02 20:45:04,380 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:45:04,381 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 139 transitions.
[2022-11-02 20:45:04,381 INFO L496 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)
[2022-11-02 20:45:04,381 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 139 transitions.
[2022-11-02 20:45:04,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2022-11-02 20:45:04,382 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-02 20:45:04,383 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-02 20:45:04,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2022-11-02 20:45:04,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:04,604 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:45:04,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:45:04,604 INFO L85 PathProgramCache]: Analyzing trace with hash -399462631, now seen corresponding path program 2 times
[2022-11-02 20:45:04,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:45:04,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721242813]
[2022-11-02 20:45:04,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:04,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:45:04,616 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:45:04,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11620130]
[2022-11-02 20:45:04,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-11-02 20:45:04,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:04,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:45:04,632 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:45:04,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2022-11-02 20:45:04,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-11-02 20:45:04,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-11-02 20:45:04,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-11-02 20:45:04,720 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:45:04,864 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked.
[2022-11-02 20:45:04,864 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-02 20:45:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked.
[2022-11-02 20:45:05,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:45:05,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721242813]
[2022-11-02 20:45:05,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:45:05,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11620130]
[2022-11-02 20:45:05,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11620130] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-02 20:45:05,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-11-02 20:45:05,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8
[2022-11-02 20:45:05,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991473690]
[2022-11-02 20:45:05,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-11-02 20:45:05,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-11-02 20:45:05,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:45:05,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-11-02 20:45:05,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2022-11-02 20:45:05,008 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)
[2022-11-02 20:45:05,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:45:05,262 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions.
[2022-11-02 20:45:05,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2022-11-02 20:45:05,263 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
[2022-11-02 20:45:05,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:45:05,265 INFO L225 Difference]: With dead ends: 118
[2022-11-02 20:45:05,265 INFO L226 Difference]: Without dead ends: 116
[2022-11-02 20:45:05,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72
[2022-11-02 20:45:05,267 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-11-02 20:45:05,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 186 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-11-02 20:45:05,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states.
[2022-11-02 20:45:05,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116.
[2022-11-02 20:45:05,309 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)
[2022-11-02 20:45:05,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 142 transitions.
[2022-11-02 20:45:05,311 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 142 transitions. Word has length 46
[2022-11-02 20:45:05,312 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:45:05,312 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 142 transitions.
[2022-11-02 20:45:05,312 INFO L496 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)
[2022-11-02 20:45:05,312 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 142 transitions.
[2022-11-02 20:45:05,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52
[2022-11-02 20:45:05,314 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-02 20:45:05,314 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-02 20:45:05,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0
[2022-11-02 20:45:05,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8
[2022-11-02 20:45:05,540 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:45:05,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:45:05,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1802852916, now seen corresponding path program 3 times
[2022-11-02 20:45:05,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:45:05,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777497484]
[2022-11-02 20:45:05,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:05,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:45:05,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:45:05,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533642154]
[2022-11-02 20:45:05,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-11-02 20:45:05,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:05,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:45:05,555 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:45:05,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process
[2022-11-02 20:45:05,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s)
[2022-11-02 20:45:05,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-11-02 20:45:05,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core
[2022-11-02 20:45:05,633 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:45:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked.
[2022-11-02 20:45:05,873 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-02 20:45:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked.
[2022-11-02 20:45:06,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:45:06,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777497484]
[2022-11-02 20:45:06,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:45:06,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533642154]
[2022-11-02 20:45:06,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533642154] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-02 20:45:06,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-11-02 20:45:06,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8
[2022-11-02 20:45:06,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023250634]
[2022-11-02 20:45:06,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-11-02 20:45:06,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-11-02 20:45:06,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:45:06,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-11-02 20:45:06,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2022-11-02 20:45:06,225 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)
[2022-11-02 20:45:07,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:45:07,062 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions.
[2022-11-02 20:45:07,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2022-11-02 20:45:07,063 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
[2022-11-02 20:45:07,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:45:07,064 INFO L225 Difference]: With dead ends: 142
[2022-11-02 20:45:07,065 INFO L226 Difference]: Without dead ends: 131
[2022-11-02 20:45:07,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90
[2022-11-02 20:45:07,066 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2022-11-02 20:45:07,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 104 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2022-11-02 20:45:07,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states.
[2022-11-02 20:45:07,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131.
[2022-11-02 20:45:07,111 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)
[2022-11-02 20:45:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions.
[2022-11-02 20:45:07,113 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 51
[2022-11-02 20:45:07,113 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:45:07,113 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions.
[2022-11-02 20:45:07,114 INFO L496 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)
[2022-11-02 20:45:07,114 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions.
[2022-11-02 20:45:07,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2022-11-02 20:45:07,115 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-02 20:45:07,115 INFO L195 NwaCegarLoop]: 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]
[2022-11-02 20:45:07,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0
[2022-11-02 20:45:07,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2022-11-02 20:45:07,324 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:45:07,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:45:07,324 INFO L85 PathProgramCache]: Analyzing trace with hash 616227619, now seen corresponding path program 1 times
[2022-11-02 20:45:07,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:45:07,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937189267]
[2022-11-02 20:45:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:07,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:45:07,336 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:45:07,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965933332]
[2022-11-02 20:45:07,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:07,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:07,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:45:07,339 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:45:07,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process
[2022-11-02 20:45:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:45:07,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core
[2022-11-02 20:45:07,427 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:45:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked.
[2022-11-02 20:45:07,743 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-02 20:45:08,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:45:08,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937189267]
[2022-11-02 20:45:08,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:45:08,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965933332]
[2022-11-02 20:45:08,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965933332] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-02 20:45:08,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences.
[2022-11-02 20:45:08,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2022-11-02 20:45:08,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855082722]
[2022-11-02 20:45:08,110 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton
[2022-11-02 20:45:08,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-11-02 20:45:08,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:45:08,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-11-02 20:45:08,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90
[2022-11-02 20:45:08,112 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)
[2022-11-02 20:45:08,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:45:08,412 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions.
[2022-11-02 20:45:08,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2022-11-02 20:45:08,413 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
[2022-11-02 20:45:08,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:45:08,415 INFO L225 Difference]: With dead ends: 137
[2022-11-02 20:45:08,415 INFO L226 Difference]: Without dead ends: 133
[2022-11-02 20:45:08,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132
[2022-11-02 20:45:08,416 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-11-02 20:45:08,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 123 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-11-02 20:45:08,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states.
[2022-11-02 20:45:08,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133.
[2022-11-02 20:45:08,455 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)
[2022-11-02 20:45:08,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions.
[2022-11-02 20:45:08,457 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 67
[2022-11-02 20:45:08,457 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:45:08,458 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions.
[2022-11-02 20:45:08,458 INFO L496 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)
[2022-11-02 20:45:08,458 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions.
[2022-11-02 20:45:08,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73
[2022-11-02 20:45:08,460 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-02 20:45:08,460 INFO L195 NwaCegarLoop]: 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]
[2022-11-02 20:45:08,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0
[2022-11-02 20:45:08,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:08,676 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:45:08,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:45:08,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1808123650, now seen corresponding path program 1 times
[2022-11-02 20:45:08,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:45:08,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145116834]
[2022-11-02 20:45:08,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:08,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:45:08,691 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:45:08,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767250328]
[2022-11-02 20:45:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:08,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:08,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:45:08,694 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:45:08,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process
[2022-11-02 20:45:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:45:08,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core
[2022-11-02 20:45:08,791 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:45:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked.
[2022-11-02 20:45:09,141 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-02 20:45:09,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:45:09,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145116834]
[2022-11-02 20:45:09,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:45:09,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767250328]
[2022-11-02 20:45:09,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767250328] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-02 20:45:09,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences.
[2022-11-02 20:45:09,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2022-11-02 20:45:09,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493925063]
[2022-11-02 20:45:09,461 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton
[2022-11-02 20:45:09,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2022-11-02 20:45:09,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:45:09,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2022-11-02 20:45:09,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2022-11-02 20:45:09,463 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)
[2022-11-02 20:45:09,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:45:09,708 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions.
[2022-11-02 20:45:09,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2022-11-02 20:45:09,709 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
[2022-11-02 20:45:09,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:45:09,711 INFO L225 Difference]: With dead ends: 135
[2022-11-02 20:45:09,711 INFO L226 Difference]: Without dead ends: 124
[2022-11-02 20:45:09,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132
[2022-11-02 20:45:09,712 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2022-11-02 20:45:09,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 153 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2022-11-02 20:45:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states.
[2022-11-02 20:45:09,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124.
[2022-11-02 20:45:09,748 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)
[2022-11-02 20:45:09,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 132 transitions.
[2022-11-02 20:45:09,749 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 132 transitions. Word has length 72
[2022-11-02 20:45:09,750 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:45:09,750 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 132 transitions.
[2022-11-02 20:45:09,750 INFO L496 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)
[2022-11-02 20:45:09,750 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 132 transitions.
[2022-11-02 20:45:09,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75
[2022-11-02 20:45:09,752 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-02 20:45:09,752 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1]
[2022-11-02 20:45:09,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0
[2022-11-02 20:45:09,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11
[2022-11-02 20:45:09,975 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:45:09,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:45:09,976 INFO L85 PathProgramCache]: Analyzing trace with hash -207258189, now seen corresponding path program 4 times
[2022-11-02 20:45:09,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:45:09,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130580133]
[2022-11-02 20:45:09,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:09,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:45:09,994 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:45:10,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422863581]
[2022-11-02 20:45:10,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-11-02 20:45:10,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:10,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:45:10,003 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:45:10,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process
[2022-11-02 20:45:10,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-11-02 20:45:10,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-11-02 20:45:10,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 47 conjunts are in the unsatisfiable core
[2022-11-02 20:45:10,254 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:45:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 81 proven. 69 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked.
[2022-11-02 20:45:10,647 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-02 20:45:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 97 proven. 22 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked.
[2022-11-02 20:45:11,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:45:11,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130580133]
[2022-11-02 20:45:11,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:45:11,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422863581]
[2022-11-02 20:45:11,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422863581] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-02 20:45:11,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-11-02 20:45:11,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15
[2022-11-02 20:45:11,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092630722]
[2022-11-02 20:45:11,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-11-02 20:45:11,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2022-11-02 20:45:11,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:45:11,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2022-11-02 20:45:11,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210
[2022-11-02 20:45:11,165 INFO L87 Difference]: Start difference. First operand 124 states and 132 transitions. Second operand has 15 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 9 states have internal predecessors, (25), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22)
[2022-11-02 20:45:11,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:45:11,684 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions.
[2022-11-02 20:45:11,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2022-11-02 20:45:11,685 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 9 states have internal predecessors, (25), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 74
[2022-11-02 20:45:11,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:45:11,692 INFO L225 Difference]: With dead ends: 134
[2022-11-02 20:45:11,692 INFO L226 Difference]: Without dead ends: 132
[2022-11-02 20:45:11,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272
[2022-11-02 20:45:11,695 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-11-02 20:45:11,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-11-02 20:45:11,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states.
[2022-11-02 20:45:11,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126.
[2022-11-02 20:45:11,738 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)
[2022-11-02 20:45:11,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions.
[2022-11-02 20:45:11,739 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 74
[2022-11-02 20:45:11,739 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:45:11,739 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions.
[2022-11-02 20:45:11,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 9 states have internal predecessors, (25), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22)
[2022-11-02 20:45:11,740 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions.
[2022-11-02 20:45:11,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96
[2022-11-02 20:45:11,741 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-02 20:45:11,742 INFO L195 NwaCegarLoop]: 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]
[2022-11-02 20:45:11,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0
[2022-11-02 20:45:11,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:11,948 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:45:11,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:45:11,949 INFO L85 PathProgramCache]: Analyzing trace with hash 308615369, now seen corresponding path program 2 times
[2022-11-02 20:45:11,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:45:11,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430983748]
[2022-11-02 20:45:11,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:11,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:45:11,962 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:45:11,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251155183]
[2022-11-02 20:45:11,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-11-02 20:45:11,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:11,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:45:11,964 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:45:11,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process
[2022-11-02 20:45:12,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-11-02 20:45:12,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-11-02 20:45:12,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 26 conjunts are in the unsatisfiable core
[2022-11-02 20:45:12,080 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:45:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 32 proven. 24 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked.
[2022-11-02 20:45:12,503 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-02 20:45:12,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:45:12,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430983748]
[2022-11-02 20:45:12,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:45:12,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251155183]
[2022-11-02 20:45:12,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251155183] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-02 20:45:12,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences.
[2022-11-02 20:45:12,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2022-11-02 20:45:12,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116020331]
[2022-11-02 20:45:12,769 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton
[2022-11-02 20:45:12,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-11-02 20:45:12,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:45:12,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-11-02 20:45:12,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110
[2022-11-02 20:45:12,770 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)
[2022-11-02 20:45:13,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:45:13,139 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions.
[2022-11-02 20:45:13,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2022-11-02 20:45:13,140 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
[2022-11-02 20:45:13,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:45:13,143 INFO L225 Difference]: With dead ends: 134
[2022-11-02 20:45:13,143 INFO L226 Difference]: Without dead ends: 132
[2022-11-02 20:45:13,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156
[2022-11-02 20:45:13,145 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-11-02 20:45:13,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 159 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-11-02 20:45:13,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states.
[2022-11-02 20:45:13,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131.
[2022-11-02 20:45:13,201 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)
[2022-11-02 20:45:13,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 136 transitions.
[2022-11-02 20:45:13,202 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 136 transitions. Word has length 95
[2022-11-02 20:45:13,203 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:45:13,203 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 136 transitions.
[2022-11-02 20:45:13,203 INFO L496 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)
[2022-11-02 20:45:13,204 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 136 transitions.
[2022-11-02 20:45:13,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101
[2022-11-02 20:45:13,205 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-02 20:45:13,205 INFO L195 NwaCegarLoop]: 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]
[2022-11-02 20:45:13,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0
[2022-11-02 20:45:13,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:13,421 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:45:13,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:45:13,422 INFO L85 PathProgramCache]: Analyzing trace with hash 75049244, now seen corresponding path program 2 times
[2022-11-02 20:45:13,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:45:13,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888431406]
[2022-11-02 20:45:13,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:13,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:45:13,436 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:45:13,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244207727]
[2022-11-02 20:45:13,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-11-02 20:45:13,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:13,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:45:13,440 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:45:13,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process
[2022-11-02 20:45:13,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-11-02 20:45:13,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-11-02 20:45:13,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 22 conjunts are in the unsatisfiable core
[2022-11-02 20:45:13,546 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:45:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked.
[2022-11-02 20:45:13,913 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-02 20:45:14,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:45:14,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888431406]
[2022-11-02 20:45:14,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:45:14,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244207727]
[2022-11-02 20:45:14,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244207727] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-02 20:45:14,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences.
[2022-11-02 20:45:14,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2022-11-02 20:45:14,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551345954]
[2022-11-02 20:45:14,250 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton
[2022-11-02 20:45:14,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-11-02 20:45:14,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:45:14,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-11-02 20:45:14,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110
[2022-11-02 20:45:14,253 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)
[2022-11-02 20:45:14,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:45:14,625 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions.
[2022-11-02 20:45:14,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2022-11-02 20:45:14,626 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
[2022-11-02 20:45:14,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:45:14,627 INFO L225 Difference]: With dead ends: 138
[2022-11-02 20:45:14,627 INFO L226 Difference]: Without dead ends: 125
[2022-11-02 20:45:14,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156
[2022-11-02 20:45:14,629 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2022-11-02 20:45:14,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 168 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2022-11-02 20:45:14,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states.
[2022-11-02 20:45:14,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125.
[2022-11-02 20:45:14,669 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)
[2022-11-02 20:45:14,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions.
[2022-11-02 20:45:14,670 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 100
[2022-11-02 20:45:14,670 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:45:14,670 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions.
[2022-11-02 20:45:14,671 INFO L496 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)
[2022-11-02 20:45:14,671 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions.
[2022-11-02 20:45:14,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124
[2022-11-02 20:45:14,672 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-02 20:45:14,673 INFO L195 NwaCegarLoop]: 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]
[2022-11-02 20:45:14,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0
[2022-11-02 20:45:14,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:14,899 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:45:14,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:45:14,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1859389073, now seen corresponding path program 3 times
[2022-11-02 20:45:14,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:45:14,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339014098]
[2022-11-02 20:45:14,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:14,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:45:14,913 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:45:14,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617279529]
[2022-11-02 20:45:14,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-11-02 20:45:14,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:14,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:45:14,915 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:45:14,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process
[2022-11-02 20:45:15,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2022-11-02 20:45:15,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-11-02 20:45:15,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core
[2022-11-02 20:45:15,698 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:45:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 110 proven. 16 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked.
[2022-11-02 20:45:15,927 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-02 20:45:18,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:45:18,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339014098]
[2022-11-02 20:45:18,033 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:45:18,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617279529]
[2022-11-02 20:45:18,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617279529] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-02 20:45:18,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences.
[2022-11-02 20:45:18,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9
[2022-11-02 20:45:18,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587069554]
[2022-11-02 20:45:18,034 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton
[2022-11-02 20:45:18,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2022-11-02 20:45:18,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:45:18,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2022-11-02 20:45:18,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=69, Unknown=1, NotChecked=0, Total=90
[2022-11-02 20:45:18,036 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11)
[2022-11-02 20:45:21,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-11-02 20:45:24,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []
[2022-11-02 20:45:24,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:45:24,666 INFO L93 Difference]: Finished difference Result 134 states and 138 transitions.
[2022-11-02 20:45:24,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2022-11-02 20:45:24,667 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 123
[2022-11-02 20:45:24,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:45:24,668 INFO L225 Difference]: With dead ends: 134
[2022-11-02 20:45:24,668 INFO L226 Difference]: Without dead ends: 132
[2022-11-02 20:45:24,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=37, Invalid=118, Unknown=1, NotChecked=0, Total=156
[2022-11-02 20:45:24,669 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 14 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 15 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time
[2022-11-02 20:45:24,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 101 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 202 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time]
[2022-11-02 20:45:24,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states.
[2022-11-02 20:45:24,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131.
[2022-11-02 20:45:24,719 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)
[2022-11-02 20:45:24,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions.
[2022-11-02 20:45:24,720 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 123
[2022-11-02 20:45:24,721 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:45:24,721 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions.
[2022-11-02 20:45:24,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11)
[2022-11-02 20:45:24,722 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions.
[2022-11-02 20:45:24,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126
[2022-11-02 20:45:24,723 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-02 20:45:24,723 INFO L195 NwaCegarLoop]: 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]
[2022-11-02 20:45:24,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0
[2022-11-02 20:45:24,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15
[2022-11-02 20:45:24,932 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:45:24,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:45:24,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1602424598, now seen corresponding path program 2 times
[2022-11-02 20:45:24,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:45:24,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208541362]
[2022-11-02 20:45:24,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:24,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:45:24,951 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:45:24,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353584739]
[2022-11-02 20:45:24,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-11-02 20:45:24,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:24,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:45:24,954 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:45:24,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process
[2022-11-02 20:45:25,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-11-02 20:45:25,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-11-02 20:45:25,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 11 conjunts are in the unsatisfiable core
[2022-11-02 20:45:25,064 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:45:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked.
[2022-11-02 20:45:25,333 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-02 20:45:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked.
[2022-11-02 20:45:25,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:45:25,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208541362]
[2022-11-02 20:45:25,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:45:25,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353584739]
[2022-11-02 20:45:25,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353584739] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-02 20:45:25,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences.
[2022-11-02 20:45:25,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8
[2022-11-02 20:45:25,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67127116]
[2022-11-02 20:45:25,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton
[2022-11-02 20:45:25,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2022-11-02 20:45:25,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:45:25,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2022-11-02 20:45:25,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56
[2022-11-02 20:45:25,542 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 5 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 5 states have call predecessors, (42), 5 states have call successors, (42)
[2022-11-02 20:45:25,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:45:25,787 INFO L93 Difference]: Finished difference Result 185 states and 191 transitions.
[2022-11-02 20:45:25,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states.
[2022-11-02 20:45:25,814 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 5 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 5 states have call predecessors, (42), 5 states have call successors, (42) Word has length 125
[2022-11-02 20:45:25,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:45:25,818 INFO L225 Difference]: With dead ends: 185
[2022-11-02 20:45:25,818 INFO L226 Difference]: Without dead ends: 170
[2022-11-02 20:45:25,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 236 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132
[2022-11-02 20:45:25,819 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2022-11-02 20:45:25,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 153 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2022-11-02 20:45:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states.
[2022-11-02 20:45:25,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168.
[2022-11-02 20:45:25,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 108 states have internal predecessors, (110), 33 states have call successors, (33), 29 states have call predecessors, (33), 28 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31)
[2022-11-02 20:45:25,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 174 transitions.
[2022-11-02 20:45:25,881 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 174 transitions. Word has length 125
[2022-11-02 20:45:25,882 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:45:25,882 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 174 transitions.
[2022-11-02 20:45:25,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 5 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 5 states have call predecessors, (42), 5 states have call successors, (42)
[2022-11-02 20:45:25,882 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 174 transitions.
[2022-11-02 20:45:25,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129
[2022-11-02 20:45:25,884 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-02 20:45:25,885 INFO L195 NwaCegarLoop]: 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]
[2022-11-02 20:45:25,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0
[2022-11-02 20:45:26,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16
[2022-11-02 20:45:26,099 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:45:26,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:45:26,100 INFO L85 PathProgramCache]: Analyzing trace with hash 709017654, now seen corresponding path program 3 times
[2022-11-02 20:45:26,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:45:26,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357625312]
[2022-11-02 20:45:26,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:26,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:45:26,112 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:45:26,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170473553]
[2022-11-02 20:45:26,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-11-02 20:45:26,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:26,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:45:26,114 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:45:26,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process
[2022-11-02 20:45:26,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2022-11-02 20:45:26,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-11-02 20:45:27,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjunts are in the unsatisfiable core
[2022-11-02 20:45:27,004 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:45:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 44 proven. 48 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked.
[2022-11-02 20:45:27,458 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-02 20:45:27,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:45:27,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357625312]
[2022-11-02 20:45:27,737 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2022-11-02 20:45:27,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170473553]
[2022-11-02 20:45:27,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170473553] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-02 20:45:27,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences.
[2022-11-02 20:45:27,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9
[2022-11-02 20:45:27,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977258994]
[2022-11-02 20:45:27,738 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton
[2022-11-02 20:45:27,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2022-11-02 20:45:27,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:45:27,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2022-11-02 20:45:27,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132
[2022-11-02 20:45:27,740 INFO L87 Difference]: Start difference. First operand 168 states and 174 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)
[2022-11-02 20:45:28,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2022-11-02 20:45:28,252 INFO L93 Difference]: Finished difference Result 170 states and 175 transitions.
[2022-11-02 20:45:28,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2022-11-02 20:45:28,253 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
[2022-11-02 20:45:28,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2022-11-02 20:45:28,254 INFO L225 Difference]: With dead ends: 170
[2022-11-02 20:45:28,254 INFO L226 Difference]: Without dead ends: 159
[2022-11-02 20:45:28,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182
[2022-11-02 20:45:28,256 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2022-11-02 20:45:28,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 202 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2022-11-02 20:45:28,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states.
[2022-11-02 20:45:28,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159.
[2022-11-02 20:45:28,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 103 states have internal predecessors, (104), 30 states have call successors, (30), 27 states have call predecessors, (30), 27 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29)
[2022-11-02 20:45:28,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 163 transitions.
[2022-11-02 20:45:28,310 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 163 transitions. Word has length 128
[2022-11-02 20:45:28,311 INFO L84 Accepts]: Finished accepts. word is rejected.
[2022-11-02 20:45:28,311 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 163 transitions.
[2022-11-02 20:45:28,311 INFO L496 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)
[2022-11-02 20:45:28,311 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 163 transitions.
[2022-11-02 20:45:28,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154
[2022-11-02 20:45:28,315 INFO L187 NwaCegarLoop]: Found error trace
[2022-11-02 20:45:28,315 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-02 20:45:28,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0
[2022-11-02 20:45:28,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17
[2022-11-02 20:45:28,522 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2022-11-02 20:45:28,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:45:28,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1091720432, now seen corresponding path program 3 times
[2022-11-02 20:45:28,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:45:28,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180436567]
[2022-11-02 20:45:28,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:45:28,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:45:28,534 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2022-11-02 20:45:28,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493181146]
[2022-11-02 20:45:28,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-11-02 20:45:28,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:28,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:45:28,537 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:45:28,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process
[2022-11-02 20:45:28,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s)
[2022-11-02 20:45:28,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat
[2022-11-02 20:45:28,895 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2022-11-02 20:45:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2022-11-02 20:45:29,083 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2022-11-02 20:45:29,084 INFO L359 BasicCegarLoop]: Counterexample is feasible
[2022-11-02 20:45:29,085 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining)
[2022-11-02 20:45:29,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0
[2022-11-02 20:45:29,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:45:29,326 INFO L444 BasicCegarLoop]: Path program histogram: [4, 3, 3, 3, 1, 1, 1, 1, 1, 1]
[2022-11-02 20:45:29,330 INFO L178 ceAbstractionStarter]: Computing trace abstraction results
[2022-11-02 20:45:29,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 08:45:29 BoogieIcfgContainer
[2022-11-02 20:45:29,402 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2022-11-02 20:45:29,402 INFO L113 PluginConnector]: ------------------------Witness Printer----------------------------
[2022-11-02 20:45:29,402 INFO L271 PluginConnector]: Initializing Witness Printer...
[2022-11-02 20:45:29,403 INFO L275 PluginConnector]: Witness Printer initialized
[2022-11-02 20:45:29,403 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:44:58" (3/4) ...
[2022-11-02 20:45:29,405 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample
[2022-11-02 20:45:29,536 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/witness.graphml
[2022-11-02 20:45:29,537 INFO L132 PluginConnector]: ------------------------ END Witness Printer----------------------------
[2022-11-02 20:45:29,537 INFO L158 Benchmark]: Toolchain (without parser) took 31741.95ms. Allocated memory was 96.5MB in the beginning and 163.6MB in the end (delta: 67.1MB). Free memory was 61.6MB in the beginning and 134.2MB in the end (delta: -72.6MB). Peak memory consumption was 84.1MB. Max. memory is 16.1GB.
[2022-11-02 20:45:29,538 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 96.5MB. Free memory was 67.7MB in the beginning and 67.6MB in the end (delta: 30.5kB). There was no memory consumed. Max. memory is 16.1GB.
[2022-11-02 20:45:29,538 INFO L158 Benchmark]: CACSL2BoogieTranslator took 445.02ms. Allocated memory is still 96.5MB. Free memory was 61.4MB in the beginning and 71.3MB in the end (delta: -9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB.
[2022-11-02 20:45:29,539 INFO L158 Benchmark]: Boogie Procedure Inliner took 74.00ms. Allocated memory is still 96.5MB. Free memory was 71.3MB in the beginning and 69.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
[2022-11-02 20:45:29,539 INFO L158 Benchmark]: Boogie Preprocessor took 55.81ms. Allocated memory is still 96.5MB. Free memory was 69.6MB in the beginning and 68.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
[2022-11-02 20:45:29,540 INFO L158 Benchmark]: RCFGBuilder took 545.92ms. Allocated memory is still 96.5MB. Free memory was 68.4MB in the beginning and 57.4MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB.
[2022-11-02 20:45:29,540 INFO L158 Benchmark]: TraceAbstraction took 30473.91ms. Allocated memory was 96.5MB in the beginning and 163.6MB in the end (delta: 67.1MB). Free memory was 56.7MB in the beginning and 48.7MB in the end (delta: 8.1MB). Peak memory consumption was 78.2MB. Max. memory is 16.1GB.
[2022-11-02 20:45:29,540 INFO L158 Benchmark]: Witness Printer took 134.42ms. Allocated memory is still 163.6MB. Free memory was 48.7MB in the beginning and 134.2MB in the end (delta: -85.5MB). Peak memory consumption was 4.7MB. Max. memory is 16.1GB.
[2022-11-02 20:45:29,543 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.34ms. Allocated memory is still 96.5MB. Free memory was 67.7MB in the beginning and 67.6MB in the end (delta: 30.5kB). There was no memory consumed. Max. memory is 16.1GB.
* CACSL2BoogieTranslator took 445.02ms. Allocated memory is still 96.5MB. Free memory was 61.4MB in the beginning and 71.3MB in the end (delta: -9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB.
* Boogie Procedure Inliner took 74.00ms. Allocated memory is still 96.5MB. Free memory was 71.3MB in the beginning and 69.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
* Boogie Preprocessor took 55.81ms. Allocated memory is still 96.5MB. Free memory was 69.6MB in the beginning and 68.4MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
* RCFGBuilder took 545.92ms. Allocated memory is still 96.5MB. Free memory was 68.4MB in the beginning and 57.4MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB.
* TraceAbstraction took 30473.91ms. Allocated memory was 96.5MB in the beginning and 163.6MB in the end (delta: 67.1MB). Free memory was 56.7MB in the beginning and 48.7MB in the end (delta: 8.1MB). Peak memory consumption was 78.2MB. Max. memory is 16.1GB.
* Witness Printer took 134.42ms. Allocated memory is still 163.6MB. Free memory was 48.7MB in the beginning and 134.2MB in the end (delta: -85.5MB). Peak memory consumption was 4.7MB. 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
- CounterExampleResult [Line: 17]: a call to reach_error is reachable
a call to reach_error is reachable
We found a FailurePath:
[L22] int counter = 0;
VAL [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
VAL [a=5, counter=0, n=0, x=0, y=1, z=6]
[L33] EXPR counter++
VAL [a=5, counter=1, counter++=0, n=0, x=0, y=1, z=6]
[L33] COND TRUE counter++<5
[L34] CALL __VERIFIER_assert(z == 6 * n + 6)
VAL [\old(cond)=1, counter=1]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=1]
[L34] RET __VERIFIER_assert(z == 6 * n + 6)
VAL [a=5, counter=1, n=0, x=0, y=1, z=6]
[L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1)
VAL [\old(cond)=1, counter=1]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=1]
[L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1)
VAL [a=5, counter=1, n=0, x=0, y=1, z=6]
[L36] CALL __VERIFIER_assert(x == n * n * n)
VAL [\old(cond)=1, counter=1]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=1]
[L36] RET __VERIFIER_assert(x == n * n * n)
VAL [a=5, counter=1, n=0, x=0, y=1, z=6]
[L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0)
VAL [\old(cond)=1, counter=1]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=1]
[L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0)
VAL [a=5, counter=1, n=0, x=0, y=1, z=6]
[L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0)
VAL [\old(cond)=1, counter=1]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=1]
[L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0)
VAL [a=5, counter=1, n=0, x=0, y=1, z=6]
[L39] COND FALSE !(!(n <= a))
[L42] n = n + 1
[L43] x = x + y
[L44] y = y + z
[L45] z = z + 6
VAL [a=5, counter=1, n=1, x=1, y=7, z=12]
[L33] EXPR counter++
VAL [a=5, counter=2, counter++=1, n=1, x=1, y=7, z=12]
[L33] COND TRUE counter++<5
[L34] CALL __VERIFIER_assert(z == 6 * n + 6)
VAL [\old(cond)=1, counter=2]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=2]
[L34] RET __VERIFIER_assert(z == 6 * n + 6)
VAL [a=5, counter=2, n=1, x=1, y=7, z=12]
[L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1)
VAL [\old(cond)=1, counter=2]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=2]
[L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1)
VAL [a=5, counter=2, n=1, x=1, y=7, z=12]
[L36] CALL __VERIFIER_assert(x == n * n * n)
VAL [\old(cond)=1, counter=2]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=2]
[L36] RET __VERIFIER_assert(x == n * n * n)
VAL [a=5, counter=2, n=1, x=1, y=7, z=12]
[L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0)
VAL [\old(cond)=1, counter=2]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=2]
[L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0)
VAL [a=5, counter=2, n=1, x=1, y=7, z=12]
[L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0)
VAL [\old(cond)=1, counter=2]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=2]
[L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0)
VAL [a=5, counter=2, n=1, x=1, y=7, z=12]
[L39] COND FALSE !(!(n <= a))
[L42] n = n + 1
[L43] x = x + y
[L44] y = y + z
[L45] z = z + 6
VAL [a=5, counter=2, n=2, x=8, y=19, z=18]
[L33] EXPR counter++
VAL [a=5, counter=3, counter++=2, n=2, x=8, y=19, z=18]
[L33] COND TRUE counter++<5
[L34] CALL __VERIFIER_assert(z == 6 * n + 6)
VAL [\old(cond)=1, counter=3]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=3]
[L34] RET __VERIFIER_assert(z == 6 * n + 6)
VAL [a=5, counter=3, n=2, x=8, y=19, z=18]
[L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1)
VAL [\old(cond)=1, counter=3]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=3]
[L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1)
VAL [a=5, counter=3, n=2, x=8, y=19, z=18]
[L36] CALL __VERIFIER_assert(x == n * n * n)
VAL [\old(cond)=1, counter=3]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=3]
[L36] RET __VERIFIER_assert(x == n * n * n)
VAL [a=5, counter=3, n=2, x=8, y=19, z=18]
[L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0)
VAL [\old(cond)=1, counter=3]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=3]
[L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0)
VAL [a=5, counter=3, n=2, x=8, y=19, z=18]
[L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0)
VAL [\old(cond)=1, counter=3]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=3]
[L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0)
VAL [a=5, counter=3, n=2, x=8, y=19, z=18]
[L39] COND FALSE !(!(n <= a))
[L42] n = n + 1
[L43] x = x + y
[L44] y = y + z
[L45] z = z + 6
VAL [a=5, counter=3, n=3, x=27, y=37, z=24]
[L33] EXPR counter++
VAL [a=5, counter=4, counter++=3, n=3, x=27, y=37, z=24]
[L33] COND TRUE counter++<5
[L34] CALL __VERIFIER_assert(z == 6 * n + 6)
VAL [\old(cond)=1, counter=4]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=4]
[L34] RET __VERIFIER_assert(z == 6 * n + 6)
VAL [a=5, counter=4, n=3, x=27, y=37, z=24]
[L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1)
VAL [\old(cond)=1, counter=4]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=4]
[L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1)
VAL [a=5, counter=4, n=3, x=27, y=37, z=24]
[L36] CALL __VERIFIER_assert(x == n * n * n)
VAL [\old(cond)=1, counter=4]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=4]
[L36] RET __VERIFIER_assert(x == n * n * n)
VAL [a=5, counter=4, n=3, x=27, y=37, z=24]
[L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0)
VAL [\old(cond)=1, counter=4]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=4]
[L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0)
VAL [a=5, counter=4, n=3, x=27, y=37, z=24]
[L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0)
VAL [\old(cond)=1, counter=4]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=4]
[L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0)
VAL [a=5, counter=4, n=3, x=27, y=37, z=24]
[L39] COND FALSE !(!(n <= a))
[L42] n = n + 1
[L43] x = x + y
[L44] y = y + z
[L45] z = z + 6
VAL [a=5, counter=4, n=4, x=64, y=61, z=30]
[L33] EXPR counter++
VAL [a=5, counter=5, counter++=4, n=4, x=64, y=61, z=30]
[L33] COND TRUE counter++<5
[L34] CALL __VERIFIER_assert(z == 6 * n + 6)
VAL [\old(cond)=1, counter=5]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=5]
[L34] RET __VERIFIER_assert(z == 6 * n + 6)
VAL [a=5, counter=5, n=4, x=64, y=61, z=30]
[L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1)
VAL [\old(cond)=1, counter=5]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=5]
[L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1)
VAL [a=5, counter=5, n=4, x=64, y=61, z=30]
[L36] CALL __VERIFIER_assert(x == n * n * n)
VAL [\old(cond)=1, counter=5]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=5]
[L36] RET __VERIFIER_assert(x == n * n * n)
VAL [a=5, counter=5, n=4, x=64, y=61, z=30]
[L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0)
VAL [\old(cond)=1, counter=5]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=5]
[L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0)
VAL [a=5, counter=5, n=4, x=64, y=61, z=30]
[L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0)
VAL [\old(cond)=1, counter=5]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=5]
[L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0)
VAL [a=5, counter=5, n=4, x=64, y=61, z=30]
[L39] COND FALSE !(!(n <= a))
[L42] n = n + 1
[L43] x = x + y
[L44] y = y + z
[L45] z = z + 6
VAL [a=5, counter=5, n=5, x=125, y=91, z=36]
[L33] EXPR counter++
VAL [a=5, counter=6, counter++=5, n=5, x=125, y=91, z=36]
[L33] COND FALSE !(counter++<5)
[L48] CALL __VERIFIER_assert(z == 6*n + 6)
VAL [\old(cond)=1, counter=6]
[L15] COND FALSE !(!(cond))
VAL [\old(cond)=1, cond=1, counter=6]
[L48] RET __VERIFIER_assert(z == 6*n + 6)
VAL [a=5, counter=6, n=5, x=125, y=91, z=36]
[L49] CALL __VERIFIER_assert(6*a*x - x*z + 12*x == 0)
VAL [\old(cond)=0, counter=6]
[L15] COND TRUE !(cond)
VAL [\old(cond)=0, cond=0, counter=6]
[L17] reach_error()
VAL [\old(cond)=0, cond=0, counter=6]
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 2 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 30.3s, OverallIterations: 19, TraceHistogramMax: 27, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 12.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 248 SdHoareTripleChecker+Valid, 10.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 194 mSDsluCounter, 2264 SdHoareTripleChecker+Invalid, 9.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1545 mSDsCounter, 249 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2212 IncrementalHoareTripleChecker+Invalid, 2463 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 249 mSolverCounterUnsat, 719 mSDtfsCounter, 2212 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1631 GetRequests, 1464 SyntacticMatches, 26 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=168occurred in iteration=17, InterpolantAutomatonStates: 124, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 18 MinimizatonAttempts, 28 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 9.6s InterpolantComputationTime, 1193 NumberOfCodeBlocks, 1009 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 1394 ConstructedInterpolants, 0 QuantifiedInterpolants, 5310 SizeOfPredicates, 33 NumberOfNonLiveVariables, 2184 ConjunctsInSsa, 254 ConjunctsInUnsatCore, 24 InterpolantComputations, 6 PerfectInterpolantSequences, 5955/6920 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 proved your program to be incorrect!
[2022-11-02 20:45:29,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb302539-0135-4672-a4be-6376e9793916/bin/uautomizer-Dbtcem3rbc/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
Writing output log to file Ultimate.log
Writing human readable error path to file UltimateCounterExample.errorpath
Result:
FALSE