./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8 --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 cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c --- 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-e04fb08 [2022-11-16 11:11:55,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:11:55,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:11:55,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:11:55,368 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:11:55,372 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:11:55,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:11:55,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:11:55,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:11:55,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:11:55,387 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:11:55,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:11:55,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:11:55,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:11:55,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:11:55,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:11:55,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:11:55,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:11:55,407 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:11:55,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:11:55,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:11:55,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:11:55,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:11:55,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:11:55,419 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:11:55,419 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:11:55,420 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:11:55,421 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:11:55,421 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:11:55,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:11:55,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:11:55,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:11:55,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:11:55,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:11:55,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:11:55,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:11:55,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:11:55,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:11:55,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:11:55,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:11:55,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:11:55,444 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:11:55,504 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:11:55,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:11:55,510 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:11:55,510 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:11:55,511 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:11:55,512 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:11:55,513 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:11:55,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:11:55,514 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:11:55,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:11:55,516 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:11:55,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:11:55,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:11:55,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:11:55,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:11:55,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:11:55,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:11:55,518 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:11:55,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:11:55,518 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:11:55,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:11:55,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:11:55,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:11:55,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:11:55,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:11:55,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:11:55,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:11:55,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:11:55,523 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:11:55,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:11:55,524 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:11:55,524 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:11:55,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:11:55,525 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_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c [2022-11-16 11:11:55,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:11:55,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:11:55,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:11:55,923 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:11:55,924 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:11:55,926 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2022-11-16 11:11:56,010 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/data/3dc201668/fcf910baa66c46d98e57e61829bb0101/FLAG7e07a96e6 [2022-11-16 11:11:56,541 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:11:56,541 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2022-11-16 11:11:56,549 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/data/3dc201668/fcf910baa66c46d98e57e61829bb0101/FLAG7e07a96e6 [2022-11-16 11:11:56,915 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/data/3dc201668/fcf910baa66c46d98e57e61829bb0101 [2022-11-16 11:11:56,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:11:56,919 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:11:56,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:11:56,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:11:56,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:11:56,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:11:56" (1/1) ... [2022-11-16 11:11:56,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bf172fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:56, skipping insertion in model container [2022-11-16 11:11:56,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:11:56" (1/1) ... [2022-11-16 11:11:56,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:11:56,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:11:57,183 WARN L229 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_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2022-11-16 11:11:57,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:11:57,248 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:11:57,274 WARN L229 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_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2022-11-16 11:11:57,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:11:57,321 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:11:57,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:57 WrapperNode [2022-11-16 11:11:57,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:11:57,323 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:11:57,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:11:57,323 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:11:57,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:57" (1/1) ... [2022-11-16 11:11:57,353 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:57" (1/1) ... [2022-11-16 11:11:57,389 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 114 [2022-11-16 11:11:57,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:11:57,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:11:57,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:11:57,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:11:57,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:57" (1/1) ... [2022-11-16 11:11:57,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:57" (1/1) ... [2022-11-16 11:11:57,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:57" (1/1) ... [2022-11-16 11:11:57,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:57" (1/1) ... [2022-11-16 11:11:57,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:57" (1/1) ... [2022-11-16 11:11:57,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:57" (1/1) ... [2022-11-16 11:11:57,434 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:57" (1/1) ... [2022-11-16 11:11:57,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:57" (1/1) ... [2022-11-16 11:11:57,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:11:57,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:11:57,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:11:57,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:11:57,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:57" (1/1) ... [2022-11-16 11:11:57,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:11:57,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:57,498 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:11:57,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:11:57,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:11:57,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:11:57,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:11:57,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:11:57,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:11:57,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:11:57,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:11:57,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 11:11:57,546 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 11:11:57,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:11:57,639 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:11:57,641 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:11:57,871 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:11:57,889 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:11:57,890 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-16 11:11:57,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:11:57 BoogieIcfgContainer [2022-11-16 11:11:57,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:11:57,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:11:57,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:11:57,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:11:57,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:11:56" (1/3) ... [2022-11-16 11:11:57,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7674937c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:11:57, skipping insertion in model container [2022-11-16 11:11:57,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:57" (2/3) ... [2022-11-16 11:11:57,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7674937c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:11:57, skipping insertion in model container [2022-11-16 11:11:57,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:11:57" (3/3) ... [2022-11-16 11:11:57,929 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2022-11-16 11:11:57,968 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:11:57,968 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:11:58,077 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:11:58,099 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;@738353fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:11:58,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:11:58,115 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 11:11:58,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:11:58,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:58,127 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:58,128 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:58,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:58,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1922481208, now seen corresponding path program 1 times [2022-11-16 11:11:58,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:58,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427247758] [2022-11-16 11:11:58,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:58,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:58,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:58,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427247758] [2022-11-16 11:11:58,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427247758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:58,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:11:58,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:11:58,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625292800] [2022-11-16 11:11:58,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:58,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:11:58,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:58,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:11:58,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:11:58,556 INFO L87 Difference]: Start difference. First operand has 40 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:58,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:58,726 INFO L93 Difference]: Finished difference Result 96 states and 155 transitions. [2022-11-16 11:11:58,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:11:58,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:11:58,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:58,740 INFO L225 Difference]: With dead ends: 96 [2022-11-16 11:11:58,740 INFO L226 Difference]: Without dead ends: 56 [2022-11-16 11:11:58,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:11:58,748 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 22 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:58,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 76 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:11:58,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-16 11:11:58,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 38. [2022-11-16 11:11:58,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 11:11:58,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-11-16 11:11:58,797 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 12 [2022-11-16 11:11:58,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:58,797 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-11-16 11:11:58,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:58,798 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-11-16 11:11:58,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:11:58,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:58,799 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:58,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:11:58,800 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:58,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:58,802 INFO L85 PathProgramCache]: Analyzing trace with hash -916904651, now seen corresponding path program 1 times [2022-11-16 11:11:58,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:58,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353211977] [2022-11-16 11:11:58,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:58,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:58,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:58,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:58,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353211977] [2022-11-16 11:11:58,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353211977] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:58,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937358473] [2022-11-16 11:11:58,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:58,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:58,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:58,969 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:58,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:11:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:59,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:11:59,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:11:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:11:59,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:11:59,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937358473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:11:59,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:11:59,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-16 11:11:59,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886326101] [2022-11-16 11:11:59,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:59,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:11:59,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:59,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:11:59,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:11:59,122 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-11-16 11:11:59,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:59,210 INFO L93 Difference]: Finished difference Result 86 states and 115 transitions. [2022-11-16 11:11:59,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:11:59,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 16 [2022-11-16 11:11:59,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:59,217 INFO L225 Difference]: With dead ends: 86 [2022-11-16 11:11:59,217 INFO L226 Difference]: Without dead ends: 55 [2022-11-16 11:11:59,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:11:59,219 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:59,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 70 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:11:59,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-16 11:11:59,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2022-11-16 11:11:59,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 11:11:59,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-11-16 11:11:59,235 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 16 [2022-11-16 11:11:59,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:59,235 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-11-16 11:11:59,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-11-16 11:11:59,236 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-11-16 11:11:59,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:11:59,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:59,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:59,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:11:59,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:59,444 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:59,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:59,445 INFO L85 PathProgramCache]: Analyzing trace with hash -107558025, now seen corresponding path program 1 times [2022-11-16 11:11:59,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:59,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165820004] [2022-11-16 11:11:59,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:59,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:59,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:59,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165820004] [2022-11-16 11:11:59,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165820004] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:59,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265433909] [2022-11-16 11:11:59,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:59,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:59,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:59,538 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:59,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:11:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:59,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:11:59,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:11:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:59,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:11:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:59,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265433909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:11:59,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:11:59,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-16 11:11:59,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195602216] [2022-11-16 11:11:59,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:11:59,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:11:59,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:59,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:11:59,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:11:59,690 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-11-16 11:11:59,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:59,842 INFO L93 Difference]: Finished difference Result 151 states and 212 transitions. [2022-11-16 11:11:59,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:11:59,843 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 16 [2022-11-16 11:11:59,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:59,844 INFO L225 Difference]: With dead ends: 151 [2022-11-16 11:11:59,845 INFO L226 Difference]: Without dead ends: 114 [2022-11-16 11:11:59,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:11:59,846 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 172 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:59,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 96 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:11:59,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-16 11:11:59,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-11-16 11:11:59,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 103 states have (on average 1.3495145631067962) internal successors, (139), 103 states have internal predecessors, (139), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 11:11:59,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 157 transitions. [2022-11-16 11:11:59,864 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 157 transitions. Word has length 16 [2022-11-16 11:11:59,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:59,864 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 157 transitions. [2022-11-16 11:11:59,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-11-16 11:11:59,865 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 157 transitions. [2022-11-16 11:11:59,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 11:11:59,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:59,867 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:59,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:00,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-16 11:12:00,071 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:00,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:00,071 INFO L85 PathProgramCache]: Analyzing trace with hash -2071104259, now seen corresponding path program 2 times [2022-11-16 11:12:00,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:00,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470687964] [2022-11-16 11:12:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:00,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:12:00,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:00,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470687964] [2022-11-16 11:12:00,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470687964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:00,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:12:00,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:12:00,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645063072] [2022-11-16 11:12:00,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:00,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:12:00,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:00,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:12:00,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:12:00,282 INFO L87 Difference]: Start difference. First operand 114 states and 157 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-11-16 11:12:00,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:00,351 INFO L93 Difference]: Finished difference Result 212 states and 294 transitions. [2022-11-16 11:12:00,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:12:00,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 22 [2022-11-16 11:12:00,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:00,352 INFO L225 Difference]: With dead ends: 212 [2022-11-16 11:12:00,353 INFO L226 Difference]: Without dead ends: 118 [2022-11-16 11:12:00,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:12:00,355 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 29 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:00,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 97 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:12:00,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-16 11:12:00,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2022-11-16 11:12:00,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 104 states have (on average 1.3461538461538463) internal successors, (140), 104 states have internal predecessors, (140), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 11:12:00,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 158 transitions. [2022-11-16 11:12:00,369 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 158 transitions. Word has length 22 [2022-11-16 11:12:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:00,370 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 158 transitions. [2022-11-16 11:12:00,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2022-11-16 11:12:00,370 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 158 transitions. [2022-11-16 11:12:00,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 11:12:00,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:00,371 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:00,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:12:00,371 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:00,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:00,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1079334847, now seen corresponding path program 1 times [2022-11-16 11:12:00,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:00,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345920015] [2022-11-16 11:12:00,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:00,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:12:00,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:00,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345920015] [2022-11-16 11:12:00,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345920015] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:00,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629790719] [2022-11-16 11:12:00,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:00,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:00,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:00,472 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:00,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:12:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:00,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:12:00,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:12:00,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:12:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:12:00,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629790719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:12:00,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:12:00,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-11-16 11:12:00,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137501601] [2022-11-16 11:12:00,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:12:00,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:12:00,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:00,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:12:00,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:12:00,700 INFO L87 Difference]: Start difference. First operand 115 states and 158 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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) [2022-11-16 11:12:01,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:01,087 INFO L93 Difference]: Finished difference Result 376 states and 540 transitions. [2022-11-16 11:12:01,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:12:01,088 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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 25 [2022-11-16 11:12:01,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:01,090 INFO L225 Difference]: With dead ends: 376 [2022-11-16 11:12:01,090 INFO L226 Difference]: Without dead ends: 272 [2022-11-16 11:12:01,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=179, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:12:01,092 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 474 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:01,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 265 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:12:01,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-16 11:12:01,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 265. [2022-11-16 11:12:01,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 242 states have (on average 1.3512396694214877) internal successors, (327), 242 states have internal predecessors, (327), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-16 11:12:01,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 369 transitions. [2022-11-16 11:12:01,126 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 369 transitions. Word has length 25 [2022-11-16 11:12:01,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:01,126 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 369 transitions. [2022-11-16 11:12:01,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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) [2022-11-16 11:12:01,127 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 369 transitions. [2022-11-16 11:12:01,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-16 11:12:01,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:01,128 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:01,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:01,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:01,339 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:01,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:01,340 INFO L85 PathProgramCache]: Analyzing trace with hash -34194041, now seen corresponding path program 2 times [2022-11-16 11:12:01,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:01,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128100017] [2022-11-16 11:12:01,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:01,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-16 11:12:01,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:01,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128100017] [2022-11-16 11:12:01,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128100017] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:01,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:12:01,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:12:01,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101998805] [2022-11-16 11:12:01,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:01,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:12:01,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:01,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:12:01,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:12:01,517 INFO L87 Difference]: Start difference. First operand 265 states and 369 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-11-16 11:12:01,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:01,598 INFO L93 Difference]: Finished difference Result 485 states and 684 transitions. [2022-11-16 11:12:01,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:12:01,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 40 [2022-11-16 11:12:01,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:01,600 INFO L225 Difference]: With dead ends: 485 [2022-11-16 11:12:01,600 INFO L226 Difference]: Without dead ends: 260 [2022-11-16 11:12:01,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:12:01,604 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:01,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 76 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:12:01,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-16 11:12:01,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2022-11-16 11:12:01,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 238 states have (on average 1.3487394957983194) internal successors, (321), 238 states have internal predecessors, (321), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-16 11:12:01,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 361 transitions. [2022-11-16 11:12:01,662 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 361 transitions. Word has length 40 [2022-11-16 11:12:01,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:01,663 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 361 transitions. [2022-11-16 11:12:01,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-11-16 11:12:01,663 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 361 transitions. [2022-11-16 11:12:01,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 11:12:01,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:01,671 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:01,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:12:01,672 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:01,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:01,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1753085294, now seen corresponding path program 1 times [2022-11-16 11:12:01,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:01,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950774423] [2022-11-16 11:12:01,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:01,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:12:01,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:01,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950774423] [2022-11-16 11:12:01,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950774423] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:01,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079248802] [2022-11-16 11:12:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:01,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:01,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:01,970 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:01,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:12:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:02,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:12:02,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:12:02,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:12:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:12:02,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079248802] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:12:02,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:12:02,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-16 11:12:02,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400620771] [2022-11-16 11:12:02,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:12:02,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 11:12:02,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:02,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 11:12:02,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:12:02,475 INFO L87 Difference]: Start difference. First operand 260 states and 361 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 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) [2022-11-16 11:12:03,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:03,221 INFO L93 Difference]: Finished difference Result 785 states and 1130 transitions. [2022-11-16 11:12:03,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 11:12:03,222 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 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 41 [2022-11-16 11:12:03,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:03,225 INFO L225 Difference]: With dead ends: 785 [2022-11-16 11:12:03,226 INFO L226 Difference]: Without dead ends: 548 [2022-11-16 11:12:03,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:12:03,228 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 1317 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1360 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:03,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1360 Valid, 421 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:12:03,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-11-16 11:12:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2022-11-16 11:12:03,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 502 states have (on average 1.3565737051792828) internal successors, (681), 502 states have internal predecessors, (681), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-16 11:12:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 769 transitions. [2022-11-16 11:12:03,261 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 769 transitions. Word has length 41 [2022-11-16 11:12:03,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:03,262 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 769 transitions. [2022-11-16 11:12:03,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 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) [2022-11-16 11:12:03,262 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 769 transitions. [2022-11-16 11:12:03,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-16 11:12:03,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:03,264 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:03,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:03,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:03,470 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:03,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:03,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1772381526, now seen corresponding path program 2 times [2022-11-16 11:12:03,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:03,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257828071] [2022-11-16 11:12:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:03,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:04,268 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:12:04,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:04,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257828071] [2022-11-16 11:12:04,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257828071] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:04,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344458791] [2022-11-16 11:12:04,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:12:04,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:04,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:04,275 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:04,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:12:04,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:12:04,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:12:04,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:12:04,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:12:04,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:12:05,552 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:12:05,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344458791] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:12:05,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:12:05,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-11-16 11:12:05,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92811135] [2022-11-16 11:12:05,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:12:05,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-16 11:12:05,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:05,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-16 11:12:05,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 11:12:05,557 INFO L87 Difference]: Start difference. First operand 548 states and 769 transitions. Second operand has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 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) [2022-11-16 11:12:07,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:07,849 INFO L93 Difference]: Finished difference Result 1625 states and 2354 transitions. [2022-11-16 11:12:07,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-16 11:12:07,850 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 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 65 [2022-11-16 11:12:07,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:07,856 INFO L225 Difference]: With dead ends: 1625 [2022-11-16 11:12:07,857 INFO L226 Difference]: Without dead ends: 1124 [2022-11-16 11:12:07,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 11:12:07,860 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 2690 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2781 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:07,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2781 Valid, 942 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 11:12:07,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-11-16 11:12:07,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1124. [2022-11-16 11:12:07,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1030 states have (on average 1.3601941747572817) internal successors, (1401), 1030 states have internal predecessors, (1401), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-16 11:12:07,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1585 transitions. [2022-11-16 11:12:07,923 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1585 transitions. Word has length 65 [2022-11-16 11:12:07,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:07,923 INFO L495 AbstractCegarLoop]: Abstraction has 1124 states and 1585 transitions. [2022-11-16 11:12:07,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 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) [2022-11-16 11:12:07,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1585 transitions. [2022-11-16 11:12:07,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-16 11:12:07,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:07,926 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:07,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-16 11:12:08,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 11:12:08,132 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:08,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:08,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1315726042, now seen corresponding path program 3 times [2022-11-16 11:12:08,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:08,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976571337] [2022-11-16 11:12:08,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:08,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:12:10,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:10,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976571337] [2022-11-16 11:12:10,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976571337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:10,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378348258] [2022-11-16 11:12:10,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:12:10,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:10,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:10,859 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:10,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:12:10,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:12:10,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:12:10,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:12:10,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2022-11-16 11:12:11,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:12:11,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378348258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:11,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:12:11,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [49] total 53 [2022-11-16 11:12:11,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43577586] [2022-11-16 11:12:11,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:11,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:12:11,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:11,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:12:11,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=1383, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 11:12:11,041 INFO L87 Difference]: Start difference. First operand 1124 states and 1585 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2022-11-16 11:12:11,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:11,190 INFO L93 Difference]: Finished difference Result 2152 states and 3073 transitions. [2022-11-16 11:12:11,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:12:11,191 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 113 [2022-11-16 11:12:11,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:11,200 INFO L225 Difference]: With dead ends: 2152 [2022-11-16 11:12:11,200 INFO L226 Difference]: Without dead ends: 1139 [2022-11-16 11:12:11,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1424, Invalid=1438, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 11:12:11,204 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 44 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:11,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 83 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:12:11,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-11-16 11:12:11,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1126. [2022-11-16 11:12:11,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 1032 states have (on average 1.3604651162790697) internal successors, (1404), 1032 states have internal predecessors, (1404), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-16 11:12:11,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1588 transitions. [2022-11-16 11:12:11,257 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1588 transitions. Word has length 113 [2022-11-16 11:12:11,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:11,258 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 1588 transitions. [2022-11-16 11:12:11,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2022-11-16 11:12:11,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1588 transitions. [2022-11-16 11:12:11,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-16 11:12:11,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:11,259 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:11,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-16 11:12:11,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:11,465 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:11,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:11,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1995784412, now seen corresponding path program 1 times [2022-11-16 11:12:11,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:11,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420914734] [2022-11-16 11:12:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:11,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:12:13,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:13,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420914734] [2022-11-16 11:12:13,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420914734] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:13,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343232803] [2022-11-16 11:12:13,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:13,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:13,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:13,759 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:13,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:12:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:13,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-16 11:12:13,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:14,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:12:14,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:12:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:12:17,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343232803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:12:17,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:12:17,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-11-16 11:12:17,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388973947] [2022-11-16 11:12:17,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:12:17,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-16 11:12:17,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:17,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-16 11:12:17,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-11-16 11:12:17,603 INFO L87 Difference]: Start difference. First operand 1126 states and 1588 transitions. Second operand has 97 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 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) [2022-11-16 11:12:28,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:28,018 INFO L93 Difference]: Finished difference Result 3309 states and 4808 transitions. [2022-11-16 11:12:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-16 11:12:28,019 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 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 113 [2022-11-16 11:12:28,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:28,029 INFO L225 Difference]: With dead ends: 3309 [2022-11-16 11:12:28,029 INFO L226 Difference]: Without dead ends: 2278 [2022-11-16 11:12:28,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-11-16 11:12:28,034 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 7583 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 1125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7770 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 3147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1125 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:28,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7770 Valid, 1628 Invalid, 3147 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1125 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-16 11:12:28,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2022-11-16 11:12:28,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 2278. [2022-11-16 11:12:28,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2088 states have (on average 1.3620689655172413) internal successors, (2844), 2088 states have internal predecessors, (2844), 188 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2022-11-16 11:12:28,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 3220 transitions. [2022-11-16 11:12:28,122 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 3220 transitions. Word has length 113 [2022-11-16 11:12:28,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:28,122 INFO L495 AbstractCegarLoop]: Abstraction has 2278 states and 3220 transitions. [2022-11-16 11:12:28,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 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) [2022-11-16 11:12:28,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 3220 transitions. [2022-11-16 11:12:28,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-16 11:12:28,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:28,125 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:28,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:28,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:12:28,331 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:28,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1143828796, now seen corresponding path program 2 times [2022-11-16 11:12:28,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:28,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857224298] [2022-11-16 11:12:28,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:28,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8841 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:12:35,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:35,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857224298] [2022-11-16 11:12:35,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857224298] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:35,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787698607] [2022-11-16 11:12:35,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:12:35,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:35,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:35,215 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:35,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:12:35,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:12:35,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:12:35,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-16 11:12:35,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8841 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:12:35,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:12:47,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8841 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:12:47,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787698607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:12:47,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:12:47,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2022-11-16 11:12:47,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707809055] [2022-11-16 11:12:47,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:12:47,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-16 11:12:47,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:47,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-16 11:12:47,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-11-16 11:12:47,517 INFO L87 Difference]: Start difference. First operand 2278 states and 3220 transitions. Second operand has 193 states, 193 states have (on average 2.062176165803109) internal successors, (398), 193 states have internal predecessors, (398), 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) [2022-11-16 11:14:09,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:14:09,796 INFO L93 Difference]: Finished difference Result 6669 states and 9704 transitions. [2022-11-16 11:14:09,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-16 11:14:09,797 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.062176165803109) internal successors, (398), 193 states have internal predecessors, (398), 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 209 [2022-11-16 11:14:09,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:14:09,817 INFO L225 Difference]: With dead ends: 6669 [2022-11-16 11:14:09,817 INFO L226 Difference]: Without dead ends: 4582 [2022-11-16 11:14:09,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-11-16 11:14:09,827 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 16424 mSDsluCounter, 2832 mSDsCounter, 0 mSdLazyCounter, 4234 mSolverCounterSat, 2447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16803 SdHoareTripleChecker+Valid, 3254 SdHoareTripleChecker+Invalid, 6681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2447 IncrementalHoareTripleChecker+Valid, 4234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:14:09,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16803 Valid, 3254 Invalid, 6681 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2447 Valid, 4234 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-16 11:14:09,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2022-11-16 11:14:09,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 4582. [2022-11-16 11:14:09,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4582 states, 4200 states have (on average 1.3628571428571428) internal successors, (5724), 4200 states have internal predecessors, (5724), 380 states have call successors, (380), 1 states have call predecessors, (380), 1 states have return successors, (380), 380 states have call predecessors, (380), 380 states have call successors, (380) [2022-11-16 11:14:10,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4582 states to 4582 states and 6484 transitions. [2022-11-16 11:14:10,005 INFO L78 Accepts]: Start accepts. Automaton has 4582 states and 6484 transitions. Word has length 209 [2022-11-16 11:14:10,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:14:10,006 INFO L495 AbstractCegarLoop]: Abstraction has 4582 states and 6484 transitions. [2022-11-16 11:14:10,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.062176165803109) internal successors, (398), 193 states have internal predecessors, (398), 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) [2022-11-16 11:14:10,007 INFO L276 IsEmpty]: Start isEmpty. Operand 4582 states and 6484 transitions. [2022-11-16 11:14:10,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-11-16 11:14:10,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:14:10,016 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:14:10,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:14:10,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:14:10,224 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:14:10,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:10,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1342680580, now seen corresponding path program 3 times [2022-11-16 11:14:10,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:14:10,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091059968] [2022-11-16 11:14:10,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:10,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:14:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 36105 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:14:36,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:14:36,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091059968] [2022-11-16 11:14:36,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091059968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:14:36,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890149102] [2022-11-16 11:14:36,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:14:36,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:14:36,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:14:36,488 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:14:36,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:14:36,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:14:36,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:14:36,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:14:36,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:14:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 36105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36100 trivial. 0 not checked. [2022-11-16 11:14:37,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:14:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 36105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36100 trivial. 0 not checked. [2022-11-16 11:14:37,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890149102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:14:37,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:14:37,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 6, 6] total 201 [2022-11-16 11:14:37,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856033522] [2022-11-16 11:14:37,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:14:37,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2022-11-16 11:14:37,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:14:37,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2022-11-16 11:14:37,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18942, Invalid=21258, Unknown=0, NotChecked=0, Total=40200 [2022-11-16 11:14:37,980 INFO L87 Difference]: Start difference. First operand 4582 states and 6484 transitions. Second operand has 201 states, 201 states have (on average 2.084577114427861) internal successors, (419), 201 states have internal predecessors, (419), 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) [2022-11-16 11:21:12,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:12,894 INFO L93 Difference]: Finished difference Result 11193 states and 16590 transitions. [2022-11-16 11:21:12,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 777 states. [2022-11-16 11:21:12,896 INFO L78 Accepts]: Start accepts. Automaton has has 201 states, 201 states have (on average 2.084577114427861) internal successors, (419), 201 states have internal predecessors, (419), 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 401 [2022-11-16 11:21:12,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:12,930 INFO L225 Difference]: With dead ends: 11193 [2022-11-16 11:21:12,930 INFO L226 Difference]: Without dead ends: 6994 [2022-11-16 11:21:13,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1575 GetRequests, 794 SyntacticMatches, 0 SemanticMatches, 781 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171373 ImplicationChecksByTransitivity, 130.5s TimeCoverageRelationStatistics Valid=192074, Invalid=420232, Unknown=0, NotChecked=0, Total=612306 [2022-11-16 11:21:13,016 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 25363 mSDsluCounter, 3617 mSDsCounter, 0 mSdLazyCounter, 4982 mSolverCounterSat, 2887 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25746 SdHoareTripleChecker+Valid, 4040 SdHoareTripleChecker+Invalid, 7869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 2887 IncrementalHoareTripleChecker+Valid, 4982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:13,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25746 Valid, 4040 Invalid, 7869 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [2887 Valid, 4982 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-11-16 11:21:13,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6994 states. [2022-11-16 11:21:13,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6994 to 6963. [2022-11-16 11:21:13,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6963 states, 6577 states have (on average 1.3233997263189905) internal successors, (8704), 6577 states have internal predecessors, (8704), 384 states have call successors, (384), 1 states have call predecessors, (384), 1 states have return successors, (384), 384 states have call predecessors, (384), 384 states have call successors, (384) [2022-11-16 11:21:13,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6963 states to 6963 states and 9472 transitions. [2022-11-16 11:21:13,367 INFO L78 Accepts]: Start accepts. Automaton has 6963 states and 9472 transitions. Word has length 401 [2022-11-16 11:21:13,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:13,368 INFO L495 AbstractCegarLoop]: Abstraction has 6963 states and 9472 transitions. [2022-11-16 11:21:13,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 201 states, 201 states have (on average 2.084577114427861) internal successors, (419), 201 states have internal predecessors, (419), 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) [2022-11-16 11:21:13,370 INFO L276 IsEmpty]: Start isEmpty. Operand 6963 states and 9472 transitions. [2022-11-16 11:21:13,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-11-16 11:21:13,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:13,380 INFO L195 NwaCegarLoop]: trace histogram [192, 192, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:13,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:21:13,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:21:13,588 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:21:13,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:13,589 INFO L85 PathProgramCache]: Analyzing trace with hash 367408256, now seen corresponding path program 4 times [2022-11-16 11:21:13,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:21:13,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277467809] [2022-11-16 11:21:13,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:13,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:21:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:47,046 INFO L134 CoverageAnalysis]: Checked inductivity of 36915 backedges. 0 proven. 36864 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-16 11:21:47,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:21:47,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277467809] [2022-11-16 11:21:47,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277467809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:21:47,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945187846] [2022-11-16 11:21:47,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:21:47,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:21:47,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:21:47,050 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:21:47,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2afa60b-78fa-44b3-ad75-2d77d60a2a42/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:21:47,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:21:47,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:21:47,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 1860 conjuncts, 194 conjunts are in the unsatisfiable core [2022-11-16 11:21:47,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:48,802 INFO L134 CoverageAnalysis]: Checked inductivity of 36915 backedges. 0 proven. 36864 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-16 11:21:48,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:22:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 36915 backedges. 0 proven. 36864 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-16 11:22:52,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945187846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:22:52,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:22:52,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [195, 195, 195] total 389 [2022-11-16 11:22:52,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329265106] [2022-11-16 11:22:52,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:22:52,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 389 states [2022-11-16 11:22:52,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:22:52,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 389 interpolants. [2022-11-16 11:22:53,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75466, Invalid=75466, Unknown=0, NotChecked=0, Total=150932 [2022-11-16 11:22:53,008 INFO L87 Difference]: Start difference. First operand 6963 states and 9472 transitions. Second operand has 389 states, 389 states have (on average 2.030848329048843) internal successors, (790), 389 states have internal predecessors, (790), 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)