./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 d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/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_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --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 --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:08:18,770 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:08:18,875 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 05:08:18,883 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:08:18,883 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:08:18,917 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:08:18,918 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:08:18,918 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:08:18,919 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:08:18,919 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:08:18,919 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:08:18,919 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:08:18,920 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:08:18,920 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:08:18,920 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:08:18,920 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:08:18,920 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 05:08:18,920 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 05:08:18,921 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:08:18,921 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 05:08:18,921 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:08:18,921 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 05:08:18,921 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:08:18,921 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 05:08:18,922 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 05:08:18,922 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 05:08:18,922 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:08:18,922 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:08:18,922 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:08:18,922 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:08:18,922 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:08:18,923 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:08:18,923 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:08:18,923 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:08:18,923 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:08:18,923 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:08:18,923 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:08:18,923 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:08:18,924 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:08:18,924 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:08:18,924 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 05:08:18,924 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 05:08:18,924 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:08:18,924 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:08:18,925 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:08:18,925 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:08:18,925 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:08:18,925 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:08:18,925 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness 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 [2024-11-28 05:08:19,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:08:19,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:08:19,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:08:19,328 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:08:19,328 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:08:19,330 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2024-11-28 05:08:22,957 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/data/5129ba368/e6a179941fa84605964a15967d0f6a29/FLAGc285c12a4 [2024-11-28 05:08:23,320 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:08:23,321 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2024-11-28 05:08:23,358 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/data/5129ba368/e6a179941fa84605964a15967d0f6a29/FLAGc285c12a4 [2024-11-28 05:08:23,385 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/data/5129ba368/e6a179941fa84605964a15967d0f6a29 [2024-11-28 05:08:23,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:08:23,394 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:08:23,396 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:08:23,396 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:08:23,403 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:08:23,404 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:08:23" (1/1) ... [2024-11-28 05:08:23,405 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1334b385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:23, skipping insertion in model container [2024-11-28 05:08:23,405 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:08:23" (1/1) ... [2024-11-28 05:08:23,432 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:08:23,659 WARN L250 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_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2024-11-28 05:08:23,703 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:08:23,716 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:08:23,729 WARN L250 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_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2024-11-28 05:08:23,744 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:08:23,762 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:08:23,763 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:23 WrapperNode [2024-11-28 05:08:23,764 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:08:23,765 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:08:23,765 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:08:23,765 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:08:23,774 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:23" (1/1) ... [2024-11-28 05:08:23,782 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:23" (1/1) ... [2024-11-28 05:08:23,805 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 108 [2024-11-28 05:08:23,806 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:08:23,806 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:08:23,807 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:08:23,807 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:08:23,819 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:23" (1/1) ... [2024-11-28 05:08:23,820 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:23" (1/1) ... [2024-11-28 05:08:23,822 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:23" (1/1) ... [2024-11-28 05:08:23,838 INFO L175 MemorySlicer]: Split 15 memory accesses to 2 slices as follows [2, 13]. 87 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-28 05:08:23,839 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:23" (1/1) ... [2024-11-28 05:08:23,839 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:23" (1/1) ... [2024-11-28 05:08:23,854 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:23" (1/1) ... [2024-11-28 05:08:23,855 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:23" (1/1) ... [2024-11-28 05:08:23,866 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:23" (1/1) ... [2024-11-28 05:08:23,868 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:23" (1/1) ... [2024-11-28 05:08:23,869 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:23" (1/1) ... [2024-11-28 05:08:23,876 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:08:23,877 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:08:23,877 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:08:23,878 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:08:23,879 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:23" (1/1) ... [2024-11-28 05:08:23,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:08:23,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:23,929 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:08:23,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:08:23,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 05:08:23,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 05:08:23,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 05:08:23,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 05:08:23,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 05:08:23,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 05:08:23,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:08:23,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:08:23,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 05:08:23,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 05:08:23,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 05:08:23,977 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 05:08:23,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 05:08:24,107 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:08:24,110 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:08:24,397 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-28 05:08:24,397 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:08:24,411 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:08:24,411 INFO L312 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-28 05:08:24,412 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:08:24 BoogieIcfgContainer [2024-11-28 05:08:24,412 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:08:24,415 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:08:24,415 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:08:24,426 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:08:24,426 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:08:23" (1/3) ... [2024-11-28 05:08:24,427 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bba21bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:08:24, skipping insertion in model container [2024-11-28 05:08:24,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:08:23" (2/3) ... [2024-11-28 05:08:24,428 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bba21bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:08:24, skipping insertion in model container [2024-11-28 05:08:24,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:08:24" (3/3) ... [2024-11-28 05:08:24,430 INFO L128 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2024-11-28 05:08:24,451 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:08:24,453 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sorting_selectionsort_2_ground.i that has 2 procedures, 44 locations, 1 initial locations, 8 loop locations, and 1 error locations. [2024-11-28 05:08:24,547 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:08:24,568 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@5afad049, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:08:24,568 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 05:08:24,574 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 39 states have internal predecessors, (58), 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) [2024-11-28 05:08:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 05:08:24,584 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:24,585 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:24,586 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:08:24,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:24,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1094504294, now seen corresponding path program 1 times [2024-11-28 05:08:24,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:24,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110628535] [2024-11-28 05:08:24,606 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:24,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:24,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:24,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110628535] [2024-11-28 05:08:24,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110628535] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:08:24,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:08:24,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 05:08:24,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670523358] [2024-11-28 05:08:24,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:08:24,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:08:24,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:24,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:08:24,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:08:24,960 INFO L87 Difference]: Start difference. First operand has 44 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 39 states have internal predecessors, (58), 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 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2024-11-28 05:08:25,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:25,144 INFO L93 Difference]: Finished difference Result 107 states and 166 transitions. [2024-11-28 05:08:25,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:08:25,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 14 [2024-11-28 05:08:25,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:25,156 INFO L225 Difference]: With dead ends: 107 [2024-11-28 05:08:25,156 INFO L226 Difference]: Without dead ends: 63 [2024-11-28 05:08:25,160 INFO L434 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 [2024-11-28 05:08:25,164 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 25 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:25,165 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 79 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:08:25,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-28 05:08:25,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 42. [2024-11-28 05:08:25,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 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) [2024-11-28 05:08:25,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2024-11-28 05:08:25,213 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 14 [2024-11-28 05:08:25,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:25,213 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2024-11-28 05:08:25,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2024-11-28 05:08:25,213 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2024-11-28 05:08:25,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-28 05:08:25,215 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:25,215 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:25,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 05:08:25,216 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:08:25,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:25,217 INFO L85 PathProgramCache]: Analyzing trace with hash 450283988, now seen corresponding path program 1 times [2024-11-28 05:08:25,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:25,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851576279] [2024-11-28 05:08:25,217 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:25,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:25,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:25,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851576279] [2024-11-28 05:08:25,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851576279] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:25,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500127279] [2024-11-28 05:08:25,448 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:25,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:25,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:25,451 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:25,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:08:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:25,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 05:08:25,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:25,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:25,645 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:08:25,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500127279] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:25,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:25,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-28 05:08:25,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926537507] [2024-11-28 05:08:25,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:25,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 05:08:25,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:25,717 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 05:08:25,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:08:25,718 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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) [2024-11-28 05:08:25,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:25,997 INFO L93 Difference]: Finished difference Result 148 states and 199 transitions. [2024-11-28 05:08:25,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:08:25,999 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 19 [2024-11-28 05:08:25,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:26,001 INFO L225 Difference]: With dead ends: 148 [2024-11-28 05:08:26,001 INFO L226 Difference]: Without dead ends: 111 [2024-11-28 05:08:26,002 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:08:26,004 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 192 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:26,005 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 114 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:08:26,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-28 05:08:26,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-11-28 05:08:26,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 100 states have (on average 1.28) internal successors, (128), 100 states have internal predecessors, (128), 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) [2024-11-28 05:08:26,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 146 transitions. [2024-11-28 05:08:26,045 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 146 transitions. Word has length 19 [2024-11-28 05:08:26,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:26,045 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 146 transitions. [2024-11-28 05:08:26,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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) [2024-11-28 05:08:26,045 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 146 transitions. [2024-11-28 05:08:26,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-28 05:08:26,046 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:26,046 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:26,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 05:08:26,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:26,253 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:08:26,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:26,254 INFO L85 PathProgramCache]: Analyzing trace with hash 675711368, now seen corresponding path program 2 times [2024-11-28 05:08:26,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:26,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750573475] [2024-11-28 05:08:26,255 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:08:26,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:26,318 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:08:26,318 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 05:08:26,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:26,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750573475] [2024-11-28 05:08:26,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750573475] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:08:26,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:08:26,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:08:26,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601187464] [2024-11-28 05:08:26,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:08:26,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:08:26,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:26,469 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:08:26,469 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:08:26,470 INFO L87 Difference]: Start difference. First operand 111 states and 146 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) [2024-11-28 05:08:26,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:26,625 INFO L93 Difference]: Finished difference Result 208 states and 277 transitions. [2024-11-28 05:08:26,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:08:26,626 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 25 [2024-11-28 05:08:26,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:26,627 INFO L225 Difference]: With dead ends: 208 [2024-11-28 05:08:26,627 INFO L226 Difference]: Without dead ends: 115 [2024-11-28 05:08:26,628 INFO L434 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 [2024-11-28 05:08:26,629 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:26,630 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 100 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:08:26,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-28 05:08:26,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2024-11-28 05:08:26,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 101 states have (on average 1.2772277227722773) internal successors, (129), 101 states have internal predecessors, (129), 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) [2024-11-28 05:08:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 147 transitions. [2024-11-28 05:08:26,646 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 147 transitions. Word has length 25 [2024-11-28 05:08:26,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:26,646 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 147 transitions. [2024-11-28 05:08:26,646 INFO L472 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) [2024-11-28 05:08:26,646 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 147 transitions. [2024-11-28 05:08:26,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 05:08:26,648 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:26,648 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:26,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 05:08:26,648 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:08:26,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:26,649 INFO L85 PathProgramCache]: Analyzing trace with hash 127219488, now seen corresponding path program 1 times [2024-11-28 05:08:26,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:26,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096543768] [2024-11-28 05:08:26,650 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:26,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 05:08:26,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:26,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096543768] [2024-11-28 05:08:26,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096543768] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:26,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480295087] [2024-11-28 05:08:26,883 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:26,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:26,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:26,886 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:26,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:08:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:26,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:08:26,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:08:27,076 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:08:27,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480295087] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:27,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:27,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2024-11-28 05:08:27,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903208655] [2024-11-28 05:08:27,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:27,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 05:08:27,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:27,234 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 05:08:27,234 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:08:27,234 INFO L87 Difference]: Start difference. First operand 112 states and 147 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 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) [2024-11-28 05:08:27,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:27,901 INFO L93 Difference]: Finished difference Result 362 states and 496 transitions. [2024-11-28 05:08:27,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 05:08:27,905 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 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 29 [2024-11-28 05:08:27,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:27,907 INFO L225 Difference]: With dead ends: 362 [2024-11-28 05:08:27,907 INFO L226 Difference]: Without dead ends: 261 [2024-11-28 05:08:27,913 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=179, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:08:27,914 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 507 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:27,914 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 287 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 05:08:27,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-11-28 05:08:27,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 255. [2024-11-28 05:08:27,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 232 states have (on average 1.2801724137931034) internal successors, (297), 232 states have internal predecessors, (297), 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) [2024-11-28 05:08:27,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 339 transitions. [2024-11-28 05:08:27,976 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 339 transitions. Word has length 29 [2024-11-28 05:08:27,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:27,976 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 339 transitions. [2024-11-28 05:08:27,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 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) [2024-11-28 05:08:27,976 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 339 transitions. [2024-11-28 05:08:27,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 05:08:27,978 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:27,978 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:27,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 05:08:28,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:28,184 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:08:28,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:28,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1518758688, now seen corresponding path program 2 times [2024-11-28 05:08:28,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:28,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196291566] [2024-11-28 05:08:28,185 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:08:28,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:28,230 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 05:08:28,234 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:28,331 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-11-28 05:08:28,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:28,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196291566] [2024-11-28 05:08:28,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196291566] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:08:28,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:08:28,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:08:28,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909408329] [2024-11-28 05:08:28,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:08:28,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:08:28,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:28,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:08:28,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:08:28,341 INFO L87 Difference]: Start difference. First operand 255 states and 339 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2024-11-28 05:08:28,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:28,469 INFO L93 Difference]: Finished difference Result 467 states and 628 transitions. [2024-11-28 05:08:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:08:28,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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 45 [2024-11-28 05:08:28,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:28,473 INFO L225 Difference]: With dead ends: 467 [2024-11-28 05:08:28,473 INFO L226 Difference]: Without dead ends: 249 [2024-11-28 05:08:28,476 INFO L434 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 [2024-11-28 05:08:28,477 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:28,477 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 96 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:08:28,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-11-28 05:08:28,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2024-11-28 05:08:28,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 227 states have (on average 1.277533039647577) internal successors, (290), 227 states have internal predecessors, (290), 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) [2024-11-28 05:08:28,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 330 transitions. [2024-11-28 05:08:28,516 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 330 transitions. Word has length 45 [2024-11-28 05:08:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:28,517 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 330 transitions. [2024-11-28 05:08:28,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2024-11-28 05:08:28,517 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 330 transitions. [2024-11-28 05:08:28,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 05:08:28,518 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:28,519 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:28,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 05:08:28,519 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:08:28,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:28,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1870729520, now seen corresponding path program 1 times [2024-11-28 05:08:28,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:28,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136384286] [2024-11-28 05:08:28,521 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:28,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:08:28,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:28,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136384286] [2024-11-28 05:08:28,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136384286] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:28,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569884775] [2024-11-28 05:08:28,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:28,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:28,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:28,955 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:28,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:08:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:29,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 05:08:29,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:08:29,216 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:08:29,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569884775] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:29,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:29,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-28 05:08:29,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429799955] [2024-11-28 05:08:29,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:29,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 05:08:29,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:29,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 05:08:29,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-28 05:08:29,639 INFO L87 Difference]: Start difference. First operand 249 states and 330 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 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) [2024-11-28 05:08:30,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:30,683 INFO L93 Difference]: Finished difference Result 751 states and 1032 transitions. [2024-11-28 05:08:30,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 05:08:30,684 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 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 45 [2024-11-28 05:08:30,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:30,690 INFO L225 Difference]: With dead ends: 751 [2024-11-28 05:08:30,691 INFO L226 Difference]: Without dead ends: 525 [2024-11-28 05:08:30,692 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-28 05:08:30,693 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 1239 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1282 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:30,697 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1282 Valid, 445 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 05:08:30,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2024-11-28 05:08:30,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2024-11-28 05:08:30,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 479 states have (on average 1.2818371607515657) internal successors, (614), 479 states have internal predecessors, (614), 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) [2024-11-28 05:08:30,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 702 transitions. [2024-11-28 05:08:30,775 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 702 transitions. Word has length 45 [2024-11-28 05:08:30,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:30,776 INFO L471 AbstractCegarLoop]: Abstraction has 525 states and 702 transitions. [2024-11-28 05:08:30,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 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) [2024-11-28 05:08:30,777 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 702 transitions. [2024-11-28 05:08:30,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-28 05:08:30,779 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:30,779 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:30,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 05:08:30,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:30,980 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:08:30,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:30,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1736450560, now seen corresponding path program 2 times [2024-11-28 05:08:30,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:30,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713827007] [2024-11-28 05:08:30,981 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:08:30,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:31,109 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:08:31,110 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:08:32,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:32,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713827007] [2024-11-28 05:08:32,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713827007] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:32,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491190572] [2024-11-28 05:08:32,423 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:08:32,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:32,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:32,426 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:32,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:08:32,627 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:08:32,627 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:32,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 05:08:32,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:08:32,813 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 05:08:34,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491190572] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:34,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:34,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-11-28 05:08:34,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675608744] [2024-11-28 05:08:34,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:34,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-28 05:08:34,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:34,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-28 05:08:34,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-11-28 05:08:34,383 INFO L87 Difference]: Start difference. First operand 525 states and 702 transitions. Second operand has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 49 states have internal predecessors, (113), 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) [2024-11-28 05:08:37,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:37,617 INFO L93 Difference]: Finished difference Result 1555 states and 2148 transitions. [2024-11-28 05:08:37,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-28 05:08:37,618 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 49 states have internal predecessors, (113), 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 69 [2024-11-28 05:08:37,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:37,626 INFO L225 Difference]: With dead ends: 1555 [2024-11-28 05:08:37,627 INFO L226 Difference]: Without dead ends: 1077 [2024-11-28 05:08:37,630 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-11-28 05:08:37,631 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 3382 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3473 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:37,631 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3473 Valid, 819 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-28 05:08:37,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2024-11-28 05:08:37,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 1077. [2024-11-28 05:08:37,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 983 states have (on average 1.28382502543235) internal successors, (1262), 983 states have internal predecessors, (1262), 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) [2024-11-28 05:08:37,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1446 transitions. [2024-11-28 05:08:37,700 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1446 transitions. Word has length 69 [2024-11-28 05:08:37,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:37,701 INFO L471 AbstractCegarLoop]: Abstraction has 1077 states and 1446 transitions. [2024-11-28 05:08:37,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.306122448979592) internal successors, (113), 49 states have internal predecessors, (113), 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) [2024-11-28 05:08:37,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1446 transitions. [2024-11-28 05:08:37,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-28 05:08:37,703 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:37,704 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:37,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 05:08:37,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:37,905 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:08:37,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:37,906 INFO L85 PathProgramCache]: Analyzing trace with hash 368702368, now seen corresponding path program 3 times [2024-11-28 05:08:37,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:37,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738155996] [2024-11-28 05:08:37,906 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:08:37,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:37,964 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:08:37,965 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2024-11-28 05:08:38,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:38,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738155996] [2024-11-28 05:08:38,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738155996] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:38,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608150735] [2024-11-28 05:08:38,043 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:08:38,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:38,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:38,046 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:38,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:08:38,214 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 05:08:38,214 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:38,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 05:08:38,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2024-11-28 05:08:38,274 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2024-11-28 05:08:38,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608150735] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:38,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:38,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-28 05:08:38,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298912855] [2024-11-28 05:08:38,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:38,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 05:08:38,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:38,403 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 05:08:38,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:08:38,404 INFO L87 Difference]: Start difference. First operand 1077 states and 1446 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 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) [2024-11-28 05:08:38,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:38,732 INFO L93 Difference]: Finished difference Result 2071 states and 2817 transitions. [2024-11-28 05:08:38,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:08:38,733 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 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 117 [2024-11-28 05:08:38,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:38,741 INFO L225 Difference]: With dead ends: 2071 [2024-11-28 05:08:38,741 INFO L226 Difference]: Without dead ends: 1101 [2024-11-28 05:08:38,744 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2024-11-28 05:08:38,745 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 109 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:38,746 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 137 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:08:38,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2024-11-28 05:08:38,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1101. [2024-11-28 05:08:38,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1007 states have (on average 1.2830188679245282) internal successors, (1292), 1007 states have internal predecessors, (1292), 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) [2024-11-28 05:08:38,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1476 transitions. [2024-11-28 05:08:38,810 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1476 transitions. Word has length 117 [2024-11-28 05:08:38,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:38,811 INFO L471 AbstractCegarLoop]: Abstraction has 1101 states and 1476 transitions. [2024-11-28 05:08:38,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 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) [2024-11-28 05:08:38,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1476 transitions. [2024-11-28 05:08:38,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-11-28 05:08:38,813 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:38,813 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:38,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 05:08:39,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:39,014 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:08:39,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:39,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1416605184, now seen corresponding path program 4 times [2024-11-28 05:08:39,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:39,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3685109] [2024-11-28 05:08:39,015 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:08:39,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:39,087 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:08:39,089 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 2148 trivial. 0 not checked. [2024-11-28 05:08:39,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:39,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3685109] [2024-11-28 05:08:39,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3685109] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:39,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276665831] [2024-11-28 05:08:39,845 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:08:39,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:39,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:39,849 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:39,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:08:40,029 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:08:40,029 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:08:40,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 05:08:40,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:40,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 05:08:40,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 12 [2024-11-28 05:08:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 2148 trivial. 0 not checked. [2024-11-28 05:08:40,355 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:40,529 INFO L349 Elim1Store]: treesize reduction 10, result has 47.4 percent of original size [2024-11-28 05:08:40,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 19 [2024-11-28 05:08:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 2148 trivial. 0 not checked. [2024-11-28 05:08:40,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276665831] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:40,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:40,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2024-11-28 05:08:40,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819037177] [2024-11-28 05:08:40,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:40,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 05:08:40,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:40,583 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 05:08:40,584 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-11-28 05:08:40,584 INFO L87 Difference]: Start difference. First operand 1101 states and 1476 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 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) [2024-11-28 05:08:41,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:08:41,435 INFO L93 Difference]: Finished difference Result 2684 states and 3697 transitions. [2024-11-28 05:08:41,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 05:08:41,436 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 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 133 [2024-11-28 05:08:41,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:08:41,450 INFO L225 Difference]: With dead ends: 2684 [2024-11-28 05:08:41,451 INFO L226 Difference]: Without dead ends: 1688 [2024-11-28 05:08:41,454 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2024-11-28 05:08:41,457 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 47 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:08:41,457 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 310 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:08:41,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2024-11-28 05:08:41,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1409. [2024-11-28 05:08:41,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1315 states have (on average 1.3155893536121672) internal successors, (1730), 1315 states have internal predecessors, (1730), 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) [2024-11-28 05:08:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 1914 transitions. [2024-11-28 05:08:41,596 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 1914 transitions. Word has length 133 [2024-11-28 05:08:41,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:08:41,596 INFO L471 AbstractCegarLoop]: Abstraction has 1409 states and 1914 transitions. [2024-11-28 05:08:41,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 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) [2024-11-28 05:08:41,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 1914 transitions. [2024-11-28 05:08:41,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-11-28 05:08:41,598 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:08:41,599 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:08:41,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 05:08:41,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-28 05:08:41,799 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:08:41,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:08:41,800 INFO L85 PathProgramCache]: Analyzing trace with hash -30401790, now seen corresponding path program 1 times [2024-11-28 05:08:41,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:08:41,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526752733] [2024-11-28 05:08:41,800 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:41,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:08:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 05:08:45,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:08:45,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526752733] [2024-11-28 05:08:45,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526752733] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:08:45,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574432924] [2024-11-28 05:08:45,353 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:08:45,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:08:45,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:08:45,359 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:08:45,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:08:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:08:45,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 05:08:45,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:08:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 05:08:45,948 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:08:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2182 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 05:08:50,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574432924] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:08:50,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:08:50,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2024-11-28 05:08:50,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713602589] [2024-11-28 05:08:50,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:08:50,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-28 05:08:50,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:08:50,282 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-28 05:08:50,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-11-28 05:08:50,286 INFO L87 Difference]: Start difference. First operand 1409 states and 1914 transitions. Second operand has 97 states, 97 states have (on average 2.1649484536082473) internal successors, (210), 97 states have internal predecessors, (210), 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) [2024-11-28 05:09:04,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:09:04,122 INFO L93 Difference]: Finished difference Result 4163 states and 5796 transitions. [2024-11-28 05:09:04,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-28 05:09:04,126 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.1649484536082473) internal successors, (210), 97 states have internal predecessors, (210), 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 133 [2024-11-28 05:09:04,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:09:04,144 INFO L225 Difference]: With dead ends: 4163 [2024-11-28 05:09:04,144 INFO L226 Difference]: Without dead ends: 2849 [2024-11-28 05:09:04,150 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-11-28 05:09:04,151 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 9551 mSDsluCounter, 1520 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9738 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 2147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:09:04,152 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9738 Valid, 1568 Invalid, 2147 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [614 Valid, 1533 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-28 05:09:04,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2849 states. [2024-11-28 05:09:04,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2849 to 2849. [2024-11-28 05:09:04,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2659 states have (on average 1.3185408048138398) internal successors, (3506), 2659 states have internal predecessors, (3506), 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) [2024-11-28 05:09:04,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 3882 transitions. [2024-11-28 05:09:04,343 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 3882 transitions. Word has length 133 [2024-11-28 05:09:04,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:09:04,343 INFO L471 AbstractCegarLoop]: Abstraction has 2849 states and 3882 transitions. [2024-11-28 05:09:04,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.1649484536082473) internal successors, (210), 97 states have internal predecessors, (210), 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) [2024-11-28 05:09:04,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 3882 transitions. [2024-11-28 05:09:04,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2024-11-28 05:09:04,351 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:09:04,351 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:09:04,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 05:09:04,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:04,552 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:09:04,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:09:04,553 INFO L85 PathProgramCache]: Analyzing trace with hash -2128347582, now seen corresponding path program 2 times [2024-11-28 05:09:04,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:09:04,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844057711] [2024-11-28 05:09:04,553 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:09:04,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:09:04,745 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:09:04,745 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8902 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 05:09:14,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:09:14,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844057711] [2024-11-28 05:09:14,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844057711] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:09:14,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943962072] [2024-11-28 05:09:14,714 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:09:14,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:09:14,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:09:14,717 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:09:14,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:09:15,124 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:09:15,124 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:09:15,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-28 05:09:15,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:09:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8902 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 05:09:15,616 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:09:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8902 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 05:09:29,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943962072] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:09:29,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:09:29,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2024-11-28 05:09:29,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757725495] [2024-11-28 05:09:29,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:09:29,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2024-11-28 05:09:29,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:09:29,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2024-11-28 05:09:29,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2024-11-28 05:09:29,312 INFO L87 Difference]: Start difference. First operand 2849 states and 3882 transitions. Second operand has 193 states, 193 states have (on average 2.082901554404145) internal successors, (402), 193 states have internal predecessors, (402), 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) [2024-11-28 05:11:46,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:11:46,152 INFO L93 Difference]: Finished difference Result 8387 states and 11700 transitions. [2024-11-28 05:11:46,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2024-11-28 05:11:46,153 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.082901554404145) internal successors, (402), 193 states have internal predecessors, (402), 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 229 [2024-11-28 05:11:46,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:11:46,185 INFO L225 Difference]: With dead ends: 8387 [2024-11-28 05:11:46,185 INFO L226 Difference]: Without dead ends: 5729 [2024-11-28 05:11:46,195 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2024-11-28 05:11:46,196 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 26004 mSDsluCounter, 3002 mSDsCounter, 0 mSdLazyCounter, 3127 mSolverCounterSat, 1488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26383 SdHoareTripleChecker+Valid, 3052 SdHoareTripleChecker+Invalid, 4615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1488 IncrementalHoareTripleChecker+Valid, 3127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:11:46,197 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26383 Valid, 3052 Invalid, 4615 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1488 Valid, 3127 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2024-11-28 05:11:46,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5729 states. [2024-11-28 05:11:46,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5729 to 5729. [2024-11-28 05:11:46,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5729 states, 5347 states have (on average 1.3199925191696278) internal successors, (7058), 5347 states have internal predecessors, (7058), 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) [2024-11-28 05:11:46,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5729 states to 5729 states and 7818 transitions. [2024-11-28 05:11:46,517 INFO L78 Accepts]: Start accepts. Automaton has 5729 states and 7818 transitions. Word has length 229 [2024-11-28 05:11:46,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:11:46,518 INFO L471 AbstractCegarLoop]: Abstraction has 5729 states and 7818 transitions. [2024-11-28 05:11:46,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.082901554404145) internal successors, (402), 193 states have internal predecessors, (402), 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) [2024-11-28 05:11:46,519 INFO L276 IsEmpty]: Start isEmpty. Operand 5729 states and 7818 transitions. [2024-11-28 05:11:46,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2024-11-28 05:11:46,526 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:11:46,527 INFO L218 NwaCegarLoop]: trace histogram [190, 190, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:46,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 05:11:46,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:46,728 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:11:46,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:46,729 INFO L85 PathProgramCache]: Analyzing trace with hash 298239170, now seen corresponding path program 3 times [2024-11-28 05:11:46,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:46,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559294561] [2024-11-28 05:11:46,730 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:11:46,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:46,924 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 05:11:46,928 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 36166 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 36100 trivial. 0 not checked. [2024-11-28 05:11:47,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:47,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559294561] [2024-11-28 05:11:47,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559294561] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:47,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397482319] [2024-11-28 05:11:47,087 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:11:47,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:47,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:47,089 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:11:47,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 05:11:47,527 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 05:11:47,527 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:47,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 05:11:47,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:11:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 36166 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 36100 trivial. 0 not checked. [2024-11-28 05:11:47,611 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:11:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 36166 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 36100 trivial. 0 not checked. [2024-11-28 05:11:47,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397482319] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:11:47,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:11:47,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2024-11-28 05:11:47,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762989767] [2024-11-28 05:11:47,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:11:47,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:11:47,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:47,775 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:11:47,775 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:11:47,776 INFO L87 Difference]: Start difference. First operand 5729 states and 7818 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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) [2024-11-28 05:11:48,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:11:48,466 INFO L93 Difference]: Finished difference Result 11095 states and 15290 transitions. [2024-11-28 05:11:48,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 05:11:48,467 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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 421 [2024-11-28 05:11:48,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:11:48,498 INFO L225 Difference]: With dead ends: 11095 [2024-11-28 05:11:48,498 INFO L226 Difference]: Without dead ends: 5777 [2024-11-28 05:11:48,511 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 871 GetRequests, 834 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=524, Invalid=958, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 05:11:48,512 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 257 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:11:48,512 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 189 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:11:48,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5777 states. [2024-11-28 05:11:48,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5777 to 5777. [2024-11-28 05:11:48,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5777 states, 5395 states have (on average 1.3193697868396663) internal successors, (7118), 5395 states have internal predecessors, (7118), 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) [2024-11-28 05:11:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5777 states to 5777 states and 7878 transitions. [2024-11-28 05:11:48,807 INFO L78 Accepts]: Start accepts. Automaton has 5777 states and 7878 transitions. Word has length 421 [2024-11-28 05:11:48,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:11:48,811 INFO L471 AbstractCegarLoop]: Abstraction has 5777 states and 7878 transitions. [2024-11-28 05:11:48,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 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) [2024-11-28 05:11:48,812 INFO L276 IsEmpty]: Start isEmpty. Operand 5777 states and 7878 transitions. [2024-11-28 05:11:48,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2024-11-28 05:11:48,821 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:11:48,821 INFO L218 NwaCegarLoop]: trace histogram [190, 190, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:48,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 05:11:49,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:49,022 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:11:49,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:49,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1756513918, now seen corresponding path program 4 times [2024-11-28 05:11:49,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:49,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909186403] [2024-11-28 05:11:49,024 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:11:49,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:11:49,235 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:11:49,235 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:50,787 INFO L134 CoverageAnalysis]: Checked inductivity of 36478 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 36100 trivial. 0 not checked. [2024-11-28 05:11:50,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:11:50,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909186403] [2024-11-28 05:11:50,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909186403] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:11:50,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409918388] [2024-11-28 05:11:50,788 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:11:50,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:50,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:11:50,790 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:11:50,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 05:11:51,556 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:11:51,556 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:11:51,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 1914 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 05:11:51,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:11:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 36478 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 36100 trivial. 0 not checked. [2024-11-28 05:11:51,709 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:11:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 36478 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 36100 trivial. 0 not checked. [2024-11-28 05:11:52,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409918388] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:11:52,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:11:52,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2024-11-28 05:11:52,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738362021] [2024-11-28 05:11:52,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:11:52,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 05:11:52,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:11:52,323 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 05:11:52,323 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 05:11:52,324 INFO L87 Difference]: Start difference. First operand 5777 states and 7878 transitions. Second operand has 34 states, 34 states have (on average 3.9411764705882355) internal successors, (134), 34 states have internal predecessors, (134), 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) [2024-11-28 05:11:54,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:11:54,009 INFO L93 Difference]: Finished difference Result 11207 states and 15442 transitions. [2024-11-28 05:11:54,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-28 05:11:54,010 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.9411764705882355) internal successors, (134), 34 states have internal predecessors, (134), 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 453 [2024-11-28 05:11:54,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:11:54,047 INFO L225 Difference]: With dead ends: 11207 [2024-11-28 05:11:54,047 INFO L226 Difference]: Without dead ends: 5873 [2024-11-28 05:11:54,060 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 967 GetRequests, 890 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2136, Invalid=4026, Unknown=0, NotChecked=0, Total=6162 [2024-11-28 05:11:54,061 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 405 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:11:54,061 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 186 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:11:54,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5873 states. [2024-11-28 05:11:54,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5873 to 5873. [2024-11-28 05:11:54,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5873 states, 5491 states have (on average 1.3181569841558916) internal successors, (7238), 5491 states have internal predecessors, (7238), 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) [2024-11-28 05:11:54,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5873 states to 5873 states and 7998 transitions. [2024-11-28 05:11:54,484 INFO L78 Accepts]: Start accepts. Automaton has 5873 states and 7998 transitions. Word has length 453 [2024-11-28 05:11:54,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:11:54,486 INFO L471 AbstractCegarLoop]: Abstraction has 5873 states and 7998 transitions. [2024-11-28 05:11:54,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.9411764705882355) internal successors, (134), 34 states have internal predecessors, (134), 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) [2024-11-28 05:11:54,487 INFO L276 IsEmpty]: Start isEmpty. Operand 5873 states and 7998 transitions. [2024-11-28 05:11:54,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2024-11-28 05:11:54,507 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:11:54,507 INFO L218 NwaCegarLoop]: trace histogram [190, 190, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:11:54,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 05:11:54,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:11:54,709 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:11:54,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:11:54,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1454202110, now seen corresponding path program 5 times [2024-11-28 05:11:54,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:11:54,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54728008] [2024-11-28 05:11:54,711 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:11:54,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:12:06,370 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 191 check-sat command(s) [2024-11-28 05:12:06,370 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:12:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 37870 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2024-11-28 05:12:32,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:12:32,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54728008] [2024-11-28 05:12:32,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54728008] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:12:32,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101729273] [2024-11-28 05:12:32,468 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:12:32,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:12:32,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:12:32,470 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:12:32,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc0aa8a9-5c7b-43c3-b031-c562a6fe45f4/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process