./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 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/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_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya --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 0.2.4-dev-0e0057c [2023-11-29 04:57:28,695 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:57:28,757 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 04:57:28,761 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:57:28,762 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:57:28,786 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:57:28,787 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:57:28,787 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:57:28,788 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:57:28,789 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:57:28,789 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:57:28,790 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:57:28,791 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:57:28,791 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:57:28,792 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:57:28,792 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:57:28,793 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:57:28,793 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:57:28,794 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:57:28,794 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:57:28,795 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:57:28,795 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:57:28,796 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:57:28,796 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:57:28,796 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:57:28,796 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:57:28,797 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:57:28,797 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:57:28,797 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:57:28,798 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:57:28,798 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:57:28,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:57:28,799 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:57:28,799 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:57:28,799 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:57:28,799 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:57:28,799 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:57:28,799 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:57:28,800 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:57:28,800 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:57:28,800 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:57:28,800 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:57:28,800 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c [2023-11-29 04:57:28,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:57:29,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:57:29,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:57:29,030 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:57:29,031 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:57:29,032 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2023-11-29 04:57:31,750 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:57:31,919 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:57:31,919 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2023-11-29 04:57:31,926 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/data/4e97eba36/924da28fba6c4695910b32d99220d28b/FLAG0b46b0b96 [2023-11-29 04:57:31,938 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/data/4e97eba36/924da28fba6c4695910b32d99220d28b [2023-11-29 04:57:31,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:57:31,942 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:57:31,943 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:57:31,943 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:57:31,948 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:57:31,948 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:57:31" (1/1) ... [2023-11-29 04:57:31,949 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13770a98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:57:31, skipping insertion in model container [2023-11-29 04:57:31,950 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:57:31" (1/1) ... [2023-11-29 04:57:31,968 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:57:32,087 WARN L240 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_cda15470-3297-443e-b649-5504ac16198b/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2023-11-29 04:57:32,107 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:57:32,115 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:57:32,125 WARN L240 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_cda15470-3297-443e-b649-5504ac16198b/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2023-11-29 04:57:32,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:57:32,151 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:57:32,151 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:57:32 WrapperNode [2023-11-29 04:57:32,151 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:57:32,152 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:57:32,152 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:57:32,153 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:57:32,159 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:57:32" (1/1) ... [2023-11-29 04:57:32,167 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:57:32" (1/1) ... [2023-11-29 04:57:32,186 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 116 [2023-11-29 04:57:32,187 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:57:32,188 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:57:32,188 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:57:32,188 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:57:32,198 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:57:32" (1/1) ... [2023-11-29 04:57:32,198 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:57:32" (1/1) ... [2023-11-29 04:57:32,201 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:57:32" (1/1) ... [2023-11-29 04:57:32,216 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]. [2023-11-29 04:57:32,216 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:57:32" (1/1) ... [2023-11-29 04:57:32,216 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:57:32" (1/1) ... [2023-11-29 04:57:32,222 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:57:32" (1/1) ... [2023-11-29 04:57:32,228 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:57:32" (1/1) ... [2023-11-29 04:57:32,229 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:57:32" (1/1) ... [2023-11-29 04:57:32,231 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:57:32" (1/1) ... [2023-11-29 04:57:32,234 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:57:32,235 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:57:32,235 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:57:32,235 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:57:32,236 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:57:32" (1/1) ... [2023-11-29 04:57:32,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:57:32,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:57:32,263 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:57:32,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:57:32,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:57:32,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:57:32,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 04:57:32,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 04:57:32,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 04:57:32,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 04:57:32,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:57:32,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:57:32,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 04:57:32,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 04:57:32,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-29 04:57:32,307 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-29 04:57:32,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:57:32,389 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:57:32,392 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:57:32,556 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:57:32,587 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:57:32,588 INFO L309 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-29 04:57:32,588 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:57:32 BoogieIcfgContainer [2023-11-29 04:57:32,588 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:57:32,591 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:57:32,591 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:57:32,595 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:57:32,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:57:31" (1/3) ... [2023-11-29 04:57:32,596 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1561b90c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:57:32, skipping insertion in model container [2023-11-29 04:57:32,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:57:32" (2/3) ... [2023-11-29 04:57:32,596 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1561b90c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:57:32, skipping insertion in model container [2023-11-29 04:57:32,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:57:32" (3/3) ... [2023-11-29 04:57:32,598 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2023-11-29 04:57:32,617 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:57:32,617 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 04:57:32,668 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:57:32,675 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@161f5378, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:57:32,675 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 04:57:32,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 28 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) [2023-11-29 04:57:32,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 04:57:32,687 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:57:32,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:57:32,688 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:57:32,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:57:32,694 INFO L85 PathProgramCache]: Analyzing trace with hash 2038256253, now seen corresponding path program 1 times [2023-11-29 04:57:32,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:57:32,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672208490] [2023-11-29 04:57:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:57:32,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:57:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:57:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:57:32,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:57:32,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672208490] [2023-11-29 04:57:32,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672208490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:57:32,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:57:32,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:57:32,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804247614] [2023-11-29 04:57:32,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:57:32,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:57:32,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:57:32,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:57:32,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:57:32,937 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 28 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) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2023-11-29 04:57:33,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:57:33,023 INFO L93 Difference]: Finished difference Result 81 states and 140 transitions. [2023-11-29 04:57:33,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:57:33,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 11 [2023-11-29 04:57:33,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:57:33,031 INFO L225 Difference]: With dead ends: 81 [2023-11-29 04:57:33,031 INFO L226 Difference]: Without dead ends: 48 [2023-11-29 04:57:33,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:57:33,037 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:57:33,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 53 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:57:33,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-29 04:57:33,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2023-11-29 04:57:33,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 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) [2023-11-29 04:57:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2023-11-29 04:57:33,071 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 11 [2023-11-29 04:57:33,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:57:33,072 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2023-11-29 04:57:33,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2023-11-29 04:57:33,072 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-11-29 04:57:33,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 04:57:33,073 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:57:33,073 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:57:33,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 04:57:33,074 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:57:33,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:57:33,075 INFO L85 PathProgramCache]: Analyzing trace with hash -891550513, now seen corresponding path program 1 times [2023-11-29 04:57:33,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:57:33,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300612075] [2023-11-29 04:57:33,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:57:33,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:57:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:57:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:57:33,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:57:33,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300612075] [2023-11-29 04:57:33,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300612075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:57:33,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293292080] [2023-11-29 04:57:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:57:33,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:57:33,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:57:33,177 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:57:33,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:57:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:57:33,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 04:57:33,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:57:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:57:33,271 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:57:33,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293292080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:57:33,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:57:33,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-29 04:57:33,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766655970] [2023-11-29 04:57:33,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:57:33,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:57:33,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:57:33,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:57:33,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:57:33,275 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. 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) [2023-11-29 04:57:33,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:57:33,329 INFO L93 Difference]: Finished difference Result 76 states and 105 transitions. [2023-11-29 04:57:33,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:57:33,329 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 [2023-11-29 04:57:33,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:57:33,331 INFO L225 Difference]: With dead ends: 76 [2023-11-29 04:57:33,331 INFO L226 Difference]: Without dead ends: 48 [2023-11-29 04:57:33,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:57:33,333 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:57:33,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 51 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:57:33,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-29 04:57:33,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2023-11-29 04:57:33,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 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) [2023-11-29 04:57:33,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2023-11-29 04:57:33,342 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 14 [2023-11-29 04:57:33,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:57:33,343 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2023-11-29 04:57:33,343 INFO L496 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) [2023-11-29 04:57:33,343 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2023-11-29 04:57:33,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 04:57:33,344 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:57:33,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:57:33,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:57:33,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-29 04:57:33,552 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:57:33,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:57:33,554 INFO L85 PathProgramCache]: Analyzing trace with hash -82203887, now seen corresponding path program 1 times [2023-11-29 04:57:33,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:57:33,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260563111] [2023-11-29 04:57:33,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:57:33,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:57:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:57:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:57:33,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:57:33,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260563111] [2023-11-29 04:57:33,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260563111] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:57:33,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219738757] [2023-11-29 04:57:33,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:57:33,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:57:33,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:57:33,660 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:57:33,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:57:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:57:33,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 04:57:33,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:57:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:57:33,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:57:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:57:33,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219738757] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:57:33,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:57:33,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-29 04:57:33,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334966131] [2023-11-29 04:57:33,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:57:33,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 04:57:33,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:57:33,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 04:57:33,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:57:33,802 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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) [2023-11-29 04:57:33,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:57:33,930 INFO L93 Difference]: Finished difference Result 134 states and 195 transitions. [2023-11-29 04:57:33,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:57:33,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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 14 [2023-11-29 04:57:33,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:57:33,933 INFO L225 Difference]: With dead ends: 134 [2023-11-29 04:57:33,933 INFO L226 Difference]: Without dead ends: 100 [2023-11-29 04:57:33,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-29 04:57:33,935 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 112 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:57:33,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 93 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:57:33,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-29 04:57:33,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-11-29 04:57:33,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 89 states have (on average 1.404494382022472) internal successors, (125), 89 states have internal predecessors, (125), 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) [2023-11-29 04:57:33,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 143 transitions. [2023-11-29 04:57:33,953 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 143 transitions. Word has length 14 [2023-11-29 04:57:33,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:57:33,954 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 143 transitions. [2023-11-29 04:57:33,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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) [2023-11-29 04:57:33,954 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 143 transitions. [2023-11-29 04:57:33,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 04:57:33,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:57:33,955 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:57:33,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 04:57:34,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:57:34,166 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:57:34,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:57:34,166 INFO L85 PathProgramCache]: Analyzing trace with hash -451950294, now seen corresponding path program 2 times [2023-11-29 04:57:34,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:57:34,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394400480] [2023-11-29 04:57:34,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:57:34,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:57:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:57:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:57:34,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:57:34,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394400480] [2023-11-29 04:57:34,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394400480] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:57:34,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:57:34,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:57:34,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153576637] [2023-11-29 04:57:34,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:57:34,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:57:34,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:57:34,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:57:34,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:57:34,258 INFO L87 Difference]: Start difference. First operand 100 states and 143 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2023-11-29 04:57:34,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:57:34,332 INFO L93 Difference]: Finished difference Result 189 states and 271 transitions. [2023-11-29 04:57:34,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:57:34,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 17 [2023-11-29 04:57:34,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:57:34,334 INFO L225 Difference]: With dead ends: 189 [2023-11-29 04:57:34,334 INFO L226 Difference]: Without dead ends: 104 [2023-11-29 04:57:34,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:57:34,336 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:57:34,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 71 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:57:34,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-29 04:57:34,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2023-11-29 04:57:34,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 90 states have (on average 1.4) internal successors, (126), 90 states have internal predecessors, (126), 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) [2023-11-29 04:57:34,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 144 transitions. [2023-11-29 04:57:34,352 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 144 transitions. Word has length 17 [2023-11-29 04:57:34,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:57:34,352 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 144 transitions. [2023-11-29 04:57:34,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2023-11-29 04:57:34,352 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 144 transitions. [2023-11-29 04:57:34,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 04:57:34,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:57:34,353 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:57:34,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 04:57:34,354 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:57:34,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:57:34,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1641264908, now seen corresponding path program 1 times [2023-11-29 04:57:34,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:57:34,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857762754] [2023-11-29 04:57:34,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:57:34,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:57:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:57:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 04:57:34,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:57:34,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857762754] [2023-11-29 04:57:34,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857762754] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:57:34,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199410972] [2023-11-29 04:57:34,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:57:34,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:57:34,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:57:34,445 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:57:34,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:57:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:57:34,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 04:57:34,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:57:34,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:57:34,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:57:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:57:34,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199410972] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:57:34,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:57:34,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-11-29 04:57:34,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151178337] [2023-11-29 04:57:34,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:57:34,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 04:57:34,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:57:34,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 04:57:34,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2023-11-29 04:57:34,644 INFO L87 Difference]: Start difference. First operand 101 states and 144 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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) [2023-11-29 04:57:35,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:57:35,013 INFO L93 Difference]: Finished difference Result 335 states and 499 transitions. [2023-11-29 04:57:35,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 04:57:35,014 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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 20 [2023-11-29 04:57:35,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:57:35,016 INFO L225 Difference]: With dead ends: 335 [2023-11-29 04:57:35,017 INFO L226 Difference]: Without dead ends: 240 [2023-11-29 04:57:35,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=179, Unknown=0, NotChecked=0, Total=306 [2023-11-29 04:57:35,019 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 438 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:57:35,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 181 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:57:35,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-11-29 04:57:35,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 233. [2023-11-29 04:57:35,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 210 states have (on average 1.4047619047619047) internal successors, (295), 210 states have internal predecessors, (295), 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) [2023-11-29 04:57:35,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 337 transitions. [2023-11-29 04:57:35,049 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 337 transitions. Word has length 20 [2023-11-29 04:57:35,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:57:35,049 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 337 transitions. [2023-11-29 04:57:35,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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) [2023-11-29 04:57:35,050 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 337 transitions. [2023-11-29 04:57:35,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 04:57:35,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:57:35,051 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:57:35,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 04:57:35,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:57:35,256 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:57:35,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:57:35,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1080408568, now seen corresponding path program 2 times [2023-11-29 04:57:35,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:57:35,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037896641] [2023-11-29 04:57:35,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:57:35,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:57:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:57:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 04:57:35,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:57:35,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037896641] [2023-11-29 04:57:35,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037896641] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:57:35,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:57:35,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:57:35,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426627193] [2023-11-29 04:57:35,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:57:35,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:57:35,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:57:35,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:57:35,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:57:35,415 INFO L87 Difference]: Start difference. First operand 233 states and 337 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-11-29 04:57:35,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:57:35,474 INFO L93 Difference]: Finished difference Result 433 states and 632 transitions. [2023-11-29 04:57:35,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:57:35,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 [2023-11-29 04:57:35,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:57:35,476 INFO L225 Difference]: With dead ends: 433 [2023-11-29 04:57:35,477 INFO L226 Difference]: Without dead ends: 229 [2023-11-29 04:57:35,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:57:35,480 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:57:35,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 59 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:57:35,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2023-11-29 04:57:35,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2023-11-29 04:57:35,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 207 states have (on average 1.4009661835748792) internal successors, (290), 207 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) [2023-11-29 04:57:35,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 330 transitions. [2023-11-29 04:57:35,503 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 330 transitions. Word has length 29 [2023-11-29 04:57:35,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:57:35,503 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 330 transitions. [2023-11-29 04:57:35,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-11-29 04:57:35,503 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 330 transitions. [2023-11-29 04:57:35,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 04:57:35,504 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:57:35,504 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:57:35,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 04:57:35,505 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:57:35,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:57:35,505 INFO L85 PathProgramCache]: Analyzing trace with hash -614793971, now seen corresponding path program 1 times [2023-11-29 04:57:35,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:57:35,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229969111] [2023-11-29 04:57:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:57:35,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:57:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:57:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:57:35,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:57:35,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229969111] [2023-11-29 04:57:35,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229969111] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:57:35,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894540809] [2023-11-29 04:57:35,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:57:35,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:57:35,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:57:35,736 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:57:35,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:57:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:57:35,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 04:57:35,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:57:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:57:35,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:57:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:57:36,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894540809] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:57:36,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:57:36,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-29 04:57:36,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42340599] [2023-11-29 04:57:36,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:57:36,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 04:57:36,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:57:36,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 04:57:36,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-29 04:57:36,089 INFO L87 Difference]: Start difference. First operand 229 states and 330 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 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) [2023-11-29 04:57:36,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:57:36,755 INFO L93 Difference]: Finished difference Result 698 states and 1043 transitions. [2023-11-29 04:57:36,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 04:57:36,756 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 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 30 [2023-11-29 04:57:36,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:57:36,760 INFO L225 Difference]: With dead ends: 698 [2023-11-29 04:57:36,760 INFO L226 Difference]: Without dead ends: 481 [2023-11-29 04:57:36,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-29 04:57:36,762 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 846 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:57:36,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 298 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 04:57:36,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2023-11-29 04:57:36,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 481. [2023-11-29 04:57:36,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 435 states have (on average 1.4114942528735632) internal successors, (614), 435 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) [2023-11-29 04:57:36,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 702 transitions. [2023-11-29 04:57:36,798 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 702 transitions. Word has length 30 [2023-11-29 04:57:36,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:57:36,798 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 702 transitions. [2023-11-29 04:57:36,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 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) [2023-11-29 04:57:36,799 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 702 transitions. [2023-11-29 04:57:36,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 04:57:36,800 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:57:36,800 INFO L195 NwaCegarLoop]: trace histogram [22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:57:36,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 04:57:37,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:57:37,006 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:57:37,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:57:37,007 INFO L85 PathProgramCache]: Analyzing trace with hash 656879565, now seen corresponding path program 2 times [2023-11-29 04:57:37,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:57:37,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829785610] [2023-11-29 04:57:37,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:57:37,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:57:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:57:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:57:37,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:57:37,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829785610] [2023-11-29 04:57:37,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829785610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:57:37,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152100227] [2023-11-29 04:57:37,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:57:37,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:57:37,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:57:37,733 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:57:37,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:57:37,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:57:37,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:57:37,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 04:57:37,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:57:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:57:37,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:57:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:57:38,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152100227] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:57:38,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:57:38,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-11-29 04:57:38,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744456375] [2023-11-29 04:57:38,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:57:38,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-29 04:57:38,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:57:38,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-29 04:57:38,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 04:57:38,703 INFO L87 Difference]: Start difference. First operand 481 states and 702 transitions. Second operand has 49 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 48 states have internal predecessors, (64), 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) [2023-11-29 04:57:40,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:57:40,214 INFO L93 Difference]: Finished difference Result 1442 states and 2171 transitions. [2023-11-29 04:57:40,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 04:57:40,214 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 48 states have internal predecessors, (64), 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 42 [2023-11-29 04:57:40,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:57:40,221 INFO L225 Difference]: With dead ends: 1442 [2023-11-29 04:57:40,221 INFO L226 Difference]: Without dead ends: 985 [2023-11-29 04:57:40,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 04:57:40,225 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2560 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2651 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 04:57:40,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2651 Valid, 468 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 04:57:40,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2023-11-29 04:57:40,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 985. [2023-11-29 04:57:40,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 891 states have (on average 1.4163860830527497) internal successors, (1262), 891 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) [2023-11-29 04:57:40,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1446 transitions. [2023-11-29 04:57:40,282 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1446 transitions. Word has length 42 [2023-11-29 04:57:40,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:57:40,282 INFO L495 AbstractCegarLoop]: Abstraction has 985 states and 1446 transitions. [2023-11-29 04:57:40,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 48 states have internal predecessors, (64), 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) [2023-11-29 04:57:40,283 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1446 transitions. [2023-11-29 04:57:40,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-29 04:57:40,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:57:40,300 INFO L195 NwaCegarLoop]: trace histogram [46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:57:40,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 04:57:40,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:57:40,500 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:57:40,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:57:40,501 INFO L85 PathProgramCache]: Analyzing trace with hash -712166067, now seen corresponding path program 3 times [2023-11-29 04:57:40,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:57:40,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936535010] [2023-11-29 04:57:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:57:40,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:57:40,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:57:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:57:42,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:57:42,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936535010] [2023-11-29 04:57:42,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936535010] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:57:42,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252426237] [2023-11-29 04:57:42,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:57:42,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:57:42,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:57:42,302 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:57:42,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:57:42,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:57:42,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:57:42,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 04:57:42,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:57:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2023-11-29 04:57:42,453 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:57:42,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252426237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:57:42,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:57:42,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [48] total 53 [2023-11-29 04:57:42,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998334249] [2023-11-29 04:57:42,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:57:42,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 04:57:42,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:57:42,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 04:57:42,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=1383, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 04:57:42,457 INFO L87 Difference]: Start difference. First operand 985 states and 1446 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2023-11-29 04:57:42,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:57:42,580 INFO L93 Difference]: Finished difference Result 1920 states and 2841 transitions. [2023-11-29 04:57:42,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:57:42,580 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 66 [2023-11-29 04:57:42,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:57:42,589 INFO L225 Difference]: With dead ends: 1920 [2023-11-29 04:57:42,589 INFO L226 Difference]: Without dead ends: 999 [2023-11-29 04:57:42,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1424, Invalid=1438, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 04:57:42,593 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:57:42,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 61 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:57:42,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2023-11-29 04:57:42,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 987. [2023-11-29 04:57:42,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 893 states have (on average 1.4165733482642777) internal successors, (1265), 893 states have internal predecessors, (1265), 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) [2023-11-29 04:57:42,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 1449 transitions. [2023-11-29 04:57:42,664 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 1449 transitions. Word has length 66 [2023-11-29 04:57:42,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:57:42,665 INFO L495 AbstractCegarLoop]: Abstraction has 987 states and 1449 transitions. [2023-11-29 04:57:42,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2023-11-29 04:57:42,665 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 1449 transitions. [2023-11-29 04:57:42,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-29 04:57:42,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:57:42,667 INFO L195 NwaCegarLoop]: trace histogram [46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:57:42,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 04:57:42,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:57:42,871 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:57:42,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:57:42,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1392224437, now seen corresponding path program 1 times [2023-11-29 04:57:42,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:57:42,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924046770] [2023-11-29 04:57:42,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:57:42,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:57:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:57:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:57:44,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:57:44,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924046770] [2023-11-29 04:57:44,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924046770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:57:44,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767348915] [2023-11-29 04:57:44,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:57:44,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:57:44,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:57:44,540 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:57:44,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:57:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:57:44,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 04:57:44,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:57:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:57:44,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:57:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:57:46,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767348915] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:57:46,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:57:46,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2023-11-29 04:57:46,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708458107] [2023-11-29 04:57:46,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:57:46,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-11-29 04:57:46,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:57:46,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-11-29 04:57:46,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-11-29 04:57:46,978 INFO L87 Difference]: Start difference. First operand 987 states and 1449 transitions. Second operand has 97 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 96 states have internal predecessors, (112), 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) [2023-11-29 04:57:54,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:57:54,614 INFO L93 Difference]: Finished difference Result 2934 states and 4433 transitions. [2023-11-29 04:57:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-29 04:57:54,614 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 96 states have internal predecessors, (112), 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 66 [2023-11-29 04:57:54,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:57:54,626 INFO L225 Difference]: With dead ends: 2934 [2023-11-29 04:57:54,627 INFO L226 Difference]: Without dead ends: 1995 [2023-11-29 04:57:54,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-11-29 04:57:54,633 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6952 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7139 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 2232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 04:57:54,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7139 Valid, 895 Invalid, 2232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 04:57:54,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2023-11-29 04:57:54,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1995. [2023-11-29 04:57:54,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1805 states have (on average 1.418836565096953) internal successors, (2561), 1805 states have internal predecessors, (2561), 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) [2023-11-29 04:57:54,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 2937 transitions. [2023-11-29 04:57:54,706 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 2937 transitions. Word has length 66 [2023-11-29 04:57:54,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:57:54,706 INFO L495 AbstractCegarLoop]: Abstraction has 1995 states and 2937 transitions. [2023-11-29 04:57:54,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 96 states have internal predecessors, (112), 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) [2023-11-29 04:57:54,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 2937 transitions. [2023-11-29 04:57:54,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-29 04:57:54,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:57:54,708 INFO L195 NwaCegarLoop]: trace histogram [94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:57:54,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 04:57:54,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 04:57:54,909 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:57:54,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:57:54,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1840848309, now seen corresponding path program 2 times [2023-11-29 04:57:54,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:57:54,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894543802] [2023-11-29 04:57:54,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:57:54,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:57:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:57:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4470 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:57:59,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:57:59,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894543802] [2023-11-29 04:57:59,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894543802] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:57:59,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834408477] [2023-11-29 04:57:59,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:57:59,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:57:59,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:57:59,769 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:57:59,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 04:58:00,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:58:00,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:58:00,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 932 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-29 04:58:00,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:58:00,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4470 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:58:00,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:58:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4470 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:58:08,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834408477] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:58:08,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:58:08,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2023-11-29 04:58:08,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814574365] [2023-11-29 04:58:08,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:58:08,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2023-11-29 04:58:08,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:58:08,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2023-11-29 04:58:08,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2023-11-29 04:58:08,821 INFO L87 Difference]: Start difference. First operand 1995 states and 2937 transitions. Second operand has 193 states, 193 states have (on average 1.077720207253886) internal successors, (208), 192 states have internal predecessors, (208), 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) [2023-11-29 04:59:25,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:59:25,055 INFO L93 Difference]: Finished difference Result 5910 states and 8945 transitions. [2023-11-29 04:59:25,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-11-29 04:59:25,055 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.077720207253886) internal successors, (208), 192 states have internal predecessors, (208), 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 114 [2023-11-29 04:59:25,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:59:25,073 INFO L225 Difference]: With dead ends: 5910 [2023-11-29 04:59:25,073 INFO L226 Difference]: Without dead ends: 4011 [2023-11-29 04:59:25,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2023-11-29 04:59:25,080 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 16446 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 3317 mSolverCounterSat, 1309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16825 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 4626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1309 IncrementalHoareTripleChecker+Valid, 3317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:59:25,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16825 Valid, 1609 Invalid, 4626 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1309 Valid, 3317 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-29 04:59:25,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4011 states. [2023-11-29 04:59:25,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4011 to 4011. [2023-11-29 04:59:25,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4011 states, 3629 states have (on average 1.4199503995591072) internal successors, (5153), 3629 states have internal predecessors, (5153), 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) [2023-11-29 04:59:25,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4011 states to 4011 states and 5913 transitions. [2023-11-29 04:59:25,197 INFO L78 Accepts]: Start accepts. Automaton has 4011 states and 5913 transitions. Word has length 114 [2023-11-29 04:59:25,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:59:25,197 INFO L495 AbstractCegarLoop]: Abstraction has 4011 states and 5913 transitions. [2023-11-29 04:59:25,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.077720207253886) internal successors, (208), 192 states have internal predecessors, (208), 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) [2023-11-29 04:59:25,198 INFO L276 IsEmpty]: Start isEmpty. Operand 4011 states and 5913 transitions. [2023-11-29 04:59:25,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-11-29 04:59:25,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:59:25,200 INFO L195 NwaCegarLoop]: trace histogram [190, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:59:25,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 04:59:25,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 04:59:25,400 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 04:59:25,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:59:25,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1465518005, now seen corresponding path program 3 times [2023-11-29 04:59:25,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:59:25,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320438762] [2023-11-29 04:59:25,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:59:25,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:59:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:59:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18150 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 04:59:42,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:59:42,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320438762] [2023-11-29 04:59:42,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320438762] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:59:42,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7248126] [2023-11-29 04:59:42,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:59:42,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:59:42,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:59:42,882 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:59:42,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 04:59:43,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 04:59:43,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:59:43,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 04:59:43,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:59:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 18150 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2023-11-29 04:59:43,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:59:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18150 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18145 trivial. 0 not checked. [2023-11-29 04:59:43,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7248126] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:59:43,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:59:43,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 6, 6] total 201 [2023-11-29 04:59:43,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77300159] [2023-11-29 04:59:43,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:59:43,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2023-11-29 04:59:43,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:59:43,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2023-11-29 04:59:43,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18942, Invalid=21258, Unknown=0, NotChecked=0, Total=40200 [2023-11-29 04:59:43,745 INFO L87 Difference]: Start difference. First operand 4011 states and 5913 transitions. Second operand has 201 states, 201 states have (on average 1.1293532338308458) internal successors, (227), 201 states have internal predecessors, (227), 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) [2023-11-29 05:03:28,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:28,446 INFO L93 Difference]: Finished difference Result 10233 states and 15630 transitions. [2023-11-29 05:03:28,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 777 states. [2023-11-29 05:03:28,447 INFO L78 Accepts]: Start accepts. Automaton has has 201 states, 201 states have (on average 1.1293532338308458) internal successors, (227), 201 states have internal predecessors, (227), 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 210 [2023-11-29 05:03:28,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:28,474 INFO L225 Difference]: With dead ends: 10233 [2023-11-29 05:03:28,474 INFO L226 Difference]: Without dead ends: 6414 [2023-11-29 05:03:28,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1192 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 781 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171373 ImplicationChecksByTransitivity, 74.3s TimeCoverageRelationStatistics Valid=192074, Invalid=420232, Unknown=0, NotChecked=0, Total=612306 [2023-11-29 05:03:28,546 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 28670 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 4161 mSolverCounterSat, 1447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29053 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 5608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1447 IncrementalHoareTripleChecker+Valid, 4161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:03:28,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29053 Valid, 1211 Invalid, 5608 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1447 Valid, 4161 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-11-29 05:03:28,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6414 states. [2023-11-29 05:03:28,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6414 to 6386. [2023-11-29 05:03:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6386 states, 6000 states have (on average 1.3545) internal successors, (8127), 6000 states have internal predecessors, (8127), 384 states have call successors, (384), 1 states have call predecessors, (384), 1 states have return successors, (384), 384 states have call predecessors, (384), 384 states have call successors, (384) [2023-11-29 05:03:28,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6386 states to 6386 states and 8895 transitions. [2023-11-29 05:03:28,853 INFO L78 Accepts]: Start accepts. Automaton has 6386 states and 8895 transitions. Word has length 210 [2023-11-29 05:03:28,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:03:28,854 INFO L495 AbstractCegarLoop]: Abstraction has 6386 states and 8895 transitions. [2023-11-29 05:03:28,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 201 states, 201 states have (on average 1.1293532338308458) internal successors, (227), 201 states have internal predecessors, (227), 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) [2023-11-29 05:03:28,854 INFO L276 IsEmpty]: Start isEmpty. Operand 6386 states and 8895 transitions. [2023-11-29 05:03:28,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-11-29 05:03:28,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:28,857 INFO L195 NwaCegarLoop]: trace histogram [192, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:28,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 05:03:29,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:29,059 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:29,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:29,059 INFO L85 PathProgramCache]: Analyzing trace with hash -969816469, now seen corresponding path program 4 times [2023-11-29 05:03:29,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:29,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29913735] [2023-11-29 05:03:29,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:29,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 18579 backedges. 0 proven. 18528 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-29 05:03:47,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:47,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29913735] [2023-11-29 05:03:47,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29913735] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:03:47,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74824698] [2023-11-29 05:03:47,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:03:47,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:47,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:47,074 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:47,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cda15470-3297-443e-b649-5504ac16198b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:03:47,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:03:47,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:03:47,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 1854 conjuncts, 194 conjunts are in the unsatisfiable core [2023-11-29 05:03:47,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 18579 backedges. 0 proven. 18528 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-29 05:03:47,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:04:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 18579 backedges. 0 proven. 18528 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-29 05:04:22,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74824698] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:04:22,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:04:22,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194, 194] total 388 [2023-11-29 05:04:22,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736208439] [2023-11-29 05:04:22,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:04:22,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 389 states [2023-11-29 05:04:22,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:22,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 389 interpolants. [2023-11-29 05:04:22,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75466, Invalid=75466, Unknown=0, NotChecked=0, Total=150932 [2023-11-29 05:04:22,289 INFO L87 Difference]: Start difference. First operand 6386 states and 8895 transitions. Second operand has 389 states, 389 states have (on average 1.038560411311054) internal successors, (404), 388 states have internal predecessors, (404), 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)