./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/max10-1.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_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/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_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/max10-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/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_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/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 1223a7fef027dae15fda123c8ce40ec49dc779b7d5d627ded9a670697417439e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:53:08,918 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:53:08,981 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:53:08,986 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:53:08,987 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:53:09,012 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:53:09,013 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:53:09,014 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:53:09,014 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:53:09,015 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:53:09,016 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:53:09,016 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:53:09,017 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:53:09,017 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:53:09,018 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:53:09,019 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:53:09,019 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:53:09,020 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:53:09,020 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:53:09,021 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:53:09,021 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:53:09,022 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:53:09,022 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:53:09,023 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:53:09,023 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:53:09,024 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:53:09,024 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:53:09,024 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:53:09,025 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:53:09,025 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:53:09,026 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:53:09,026 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:53:09,026 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:53:09,027 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:53:09,027 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:53:09,027 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:53:09,027 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:53:09,027 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:53:09,027 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:53:09,028 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:53:09,028 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:53:09,028 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:53:09,028 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_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1223a7fef027dae15fda123c8ce40ec49dc779b7d5d627ded9a670697417439e [2023-11-29 05:53:09,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:53:09,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:53:09,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:53:09,243 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:53:09,244 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:53:09,245 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/reducercommutativity/max10-1.i [2023-11-29 05:53:12,077 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:53:12,230 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:53:12,231 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/sv-benchmarks/c/reducercommutativity/max10-1.i [2023-11-29 05:53:12,237 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/data/e42cd187c/064f1ffd97d5443daeb0e13ef069fe2a/FLAG9f6d743de [2023-11-29 05:53:12,248 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/data/e42cd187c/064f1ffd97d5443daeb0e13ef069fe2a [2023-11-29 05:53:12,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:53:12,251 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:53:12,252 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:53:12,252 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:53:12,256 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:53:12,257 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:53:12" (1/1) ... [2023-11-29 05:53:12,258 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@695b9b56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:12, skipping insertion in model container [2023-11-29 05:53:12,258 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:53:12" (1/1) ... [2023-11-29 05:53:12,279 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:53:12,413 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_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/sv-benchmarks/c/reducercommutativity/max10-1.i[1290,1303] [2023-11-29 05:53:12,417 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:53:12,426 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:53:12,446 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_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/sv-benchmarks/c/reducercommutativity/max10-1.i[1290,1303] [2023-11-29 05:53:12,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:53:12,459 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:53:12,459 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:12 WrapperNode [2023-11-29 05:53:12,460 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:53:12,460 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:53:12,461 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:53:12,461 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:53:12,466 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:12" (1/1) ... [2023-11-29 05:53:12,473 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:12" (1/1) ... [2023-11-29 05:53:12,489 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-11-29 05:53:12,490 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:53:12,490 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:53:12,490 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:53:12,491 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:53:12,499 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:12" (1/1) ... [2023-11-29 05:53:12,499 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:12" (1/1) ... [2023-11-29 05:53:12,502 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:12" (1/1) ... [2023-11-29 05:53:12,516 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2023-11-29 05:53:12,516 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:12" (1/1) ... [2023-11-29 05:53:12,516 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:12" (1/1) ... [2023-11-29 05:53:12,522 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:12" (1/1) ... [2023-11-29 05:53:12,526 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:12" (1/1) ... [2023-11-29 05:53:12,528 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:12" (1/1) ... [2023-11-29 05:53:12,529 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:12" (1/1) ... [2023-11-29 05:53:12,532 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:53:12,533 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:53:12,533 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:53:12,533 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:53:12,534 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:12" (1/1) ... [2023-11-29 05:53:12,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:53:12,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:53:12,560 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:53:12,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:53:12,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:53:12,599 INFO L130 BoogieDeclarations]: Found specification of procedure max [2023-11-29 05:53:12,599 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2023-11-29 05:53:12,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:53:12,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:53:12,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:53:12,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:53:12,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:53:12,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:53:12,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:53:12,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:53:12,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:53:12,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:53:12,680 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:53:12,682 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:53:12,821 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:53:12,853 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:53:12,853 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 05:53:12,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:53:12 BoogieIcfgContainer [2023-11-29 05:53:12,854 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:53:12,857 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:53:12,857 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:53:12,861 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:53:12,861 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:53:12" (1/3) ... [2023-11-29 05:53:12,862 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f854db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:53:12, skipping insertion in model container [2023-11-29 05:53:12,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:12" (2/3) ... [2023-11-29 05:53:12,862 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f854db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:53:12, skipping insertion in model container [2023-11-29 05:53:12,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:53:12" (3/3) ... [2023-11-29 05:53:12,864 INFO L112 eAbstractionObserver]: Analyzing ICFG max10-1.i [2023-11-29 05:53:12,879 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:53:12,879 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:53:12,920 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:53:12,926 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;@bcbdbb9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:53:12,926 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 05:53:12,930 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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 05:53:12,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 05:53:12,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:53:12,936 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:53:12,937 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:53:12,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:53:12,941 INFO L85 PathProgramCache]: Analyzing trace with hash 548279552, now seen corresponding path program 1 times [2023-11-29 05:53:12,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:53:12,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727924600] [2023-11-29 05:53:12,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:12,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:53:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:13,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:53:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:13,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:53:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:13,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 05:53:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 05:53:13,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:53:13,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727924600] [2023-11-29 05:53:13,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727924600] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:53:13,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:53:13,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:53:13,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794734087] [2023-11-29 05:53:13,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:53:13,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 05:53:13,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:53:13,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 05:53:13,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 05:53:13,209 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 05:53:13,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:53:13,263 INFO L93 Difference]: Finished difference Result 42 states and 61 transitions. [2023-11-29 05:53:13,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 05:53:13,266 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-11-29 05:53:13,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:53:13,271 INFO L225 Difference]: With dead ends: 42 [2023-11-29 05:53:13,271 INFO L226 Difference]: Without dead ends: 20 [2023-11-29 05:53:13,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 05:53:13,279 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:53:13,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:53:13,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-29 05:53:13,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-29 05:53:13,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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 05:53:13,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-11-29 05:53:13,317 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 25 [2023-11-29 05:53:13,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:53:13,317 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-11-29 05:53:13,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 05:53:13,317 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-11-29 05:53:13,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 05:53:13,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:53:13,319 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:53:13,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:53:13,320 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:53:13,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:53:13,321 INFO L85 PathProgramCache]: Analyzing trace with hash -419783731, now seen corresponding path program 1 times [2023-11-29 05:53:13,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:53:13,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396248195] [2023-11-29 05:53:13,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:13,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:53:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:13,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-29 05:53:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:13,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-29 05:53:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:13,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-29 05:53:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:53:13,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:53:13,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396248195] [2023-11-29 05:53:13,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396248195] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:53:13,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531145823] [2023-11-29 05:53:13,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:13,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:13,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:53:13,482 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:53:13,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:53:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:13,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:53:13,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:53:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 05:53:13,598 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:53:13,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531145823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:53:13,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:53:13,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-29 05:53:13,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280613578] [2023-11-29 05:53:13,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:53:13,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:53:13,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:53:13,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:53:13,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:53:13,603 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 05:53:13,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:53:13,623 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-11-29 05:53:13,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:53:13,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-11-29 05:53:13,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:53:13,625 INFO L225 Difference]: With dead ends: 39 [2023-11-29 05:53:13,625 INFO L226 Difference]: Without dead ends: 21 [2023-11-29 05:53:13,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:53:13,627 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:53:13,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:53:13,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-29 05:53:13,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-29 05:53:13,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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 05:53:13,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-11-29 05:53:13,634 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 25 [2023-11-29 05:53:13,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:53:13,635 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-11-29 05:53:13,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-29 05:53:13,635 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-11-29 05:53:13,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 05:53:13,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:53:13,636 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:53:13,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:53:13,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:13,838 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:53:13,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:53:13,838 INFO L85 PathProgramCache]: Analyzing trace with hash 836676700, now seen corresponding path program 1 times [2023-11-29 05:53:13,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:53:13,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455490085] [2023-11-29 05:53:13,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:13,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:53:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:13,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 05:53:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:13,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-29 05:53:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:13,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-29 05:53:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:53:13,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:53:13,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455490085] [2023-11-29 05:53:13,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455490085] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:53:13,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436776630] [2023-11-29 05:53:13,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:13,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:13,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:53:13,963 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:53:13,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:53:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:14,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:53:14,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:53:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:53:14,046 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:53:14,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436776630] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:53:14,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:53:14,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-11-29 05:53:14,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671958394] [2023-11-29 05:53:14,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:53:14,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:53:14,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:53:14,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:53:14,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:53:14,049 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 05:53:14,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:53:14,071 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2023-11-29 05:53:14,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:53:14,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-11-29 05:53:14,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:53:14,073 INFO L225 Difference]: With dead ends: 40 [2023-11-29 05:53:14,073 INFO L226 Difference]: Without dead ends: 24 [2023-11-29 05:53:14,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 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 05:53:14,075 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:53:14,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:53:14,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-29 05:53:14,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-11-29 05:53:14,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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 05:53:14,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-11-29 05:53:14,081 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 26 [2023-11-29 05:53:14,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:53:14,081 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-11-29 05:53:14,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 05:53:14,082 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-11-29 05:53:14,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 05:53:14,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:53:14,083 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:53:14,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:53:14,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:14,284 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:53:14,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:53:14,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1099478403, now seen corresponding path program 1 times [2023-11-29 05:53:14,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:53:14,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574244009] [2023-11-29 05:53:14,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:14,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:53:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:14,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 05:53:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:14,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-29 05:53:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:14,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-29 05:53:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 05:53:14,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:53:14,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574244009] [2023-11-29 05:53:14,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574244009] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:53:14,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913611240] [2023-11-29 05:53:14,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:14,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:14,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:53:14,406 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:53:14,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:53:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:14,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:53:14,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:53:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-29 05:53:14,507 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:53:14,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913611240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:53:14,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:53:14,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-29 05:53:14,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798073646] [2023-11-29 05:53:14,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:53:14,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:53:14,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:53:14,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:53:14,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:53:14,510 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 05:53:14,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:53:14,527 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2023-11-29 05:53:14,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:53:14,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-11-29 05:53:14,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:53:14,529 INFO L225 Difference]: With dead ends: 36 [2023-11-29 05:53:14,529 INFO L226 Difference]: Without dead ends: 23 [2023-11-29 05:53:14,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:53:14,531 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:53:14,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:53:14,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-29 05:53:14,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-29 05:53:14,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 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 05:53:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-11-29 05:53:14,536 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 35 [2023-11-29 05:53:14,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:53:14,538 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-11-29 05:53:14,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-29 05:53:14,538 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-11-29 05:53:14,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 05:53:14,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:53:14,539 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:53:14,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:53:14,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:14,744 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:53:14,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:53:14,745 INFO L85 PathProgramCache]: Analyzing trace with hash -189935555, now seen corresponding path program 1 times [2023-11-29 05:53:14,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:53:14,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839130674] [2023-11-29 05:53:14,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:14,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:53:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:14,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-29 05:53:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:14,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-29 05:53:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:14,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-29 05:53:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 05:53:14,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:53:14,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839130674] [2023-11-29 05:53:14,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839130674] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:53:14,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649932505] [2023-11-29 05:53:14,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:14,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:14,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:53:14,844 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:53:14,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:53:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:14,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:53:14,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:53:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 05:53:14,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:53:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 05:53:14,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649932505] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:53:14,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:53:14,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2023-11-29 05:53:14,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590133243] [2023-11-29 05:53:14,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:53:14,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:53:14,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:53:14,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:53:14,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:53:14,997 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-29 05:53:15,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:53:15,072 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2023-11-29 05:53:15,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:53:15,074 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 36 [2023-11-29 05:53:15,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:53:15,075 INFO L225 Difference]: With dead ends: 51 [2023-11-29 05:53:15,075 INFO L226 Difference]: Without dead ends: 31 [2023-11-29 05:53:15,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:53:15,078 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:53:15,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 51 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:53:15,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-29 05:53:15,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-11-29 05:53:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 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 05:53:15,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-11-29 05:53:15,088 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 36 [2023-11-29 05:53:15,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:53:15,088 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-11-29 05:53:15,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-29 05:53:15,088 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-11-29 05:53:15,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-29 05:53:15,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:53:15,091 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:53:15,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:53:15,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:15,297 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:53:15,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:53:15,298 INFO L85 PathProgramCache]: Analyzing trace with hash -822209617, now seen corresponding path program 2 times [2023-11-29 05:53:15,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:53:15,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68414729] [2023-11-29 05:53:15,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:15,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:53:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:15,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-29 05:53:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:15,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-29 05:53:15,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:15,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-29 05:53:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-29 05:53:15,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:53:15,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68414729] [2023-11-29 05:53:15,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68414729] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:53:15,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929058458] [2023-11-29 05:53:15,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:53:15,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:15,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:53:15,417 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:53:15,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:53:15,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:53:15,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:53:15,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:53:15,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:53:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-29 05:53:15,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:53:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-29 05:53:15,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929058458] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:53:15,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:53:15,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-11-29 05:53:15,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46529865] [2023-11-29 05:53:15,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:53:15,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:53:15,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:53:15,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:53:15,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:53:15,665 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 05:53:15,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:53:15,706 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2023-11-29 05:53:15,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:53:15,706 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2023-11-29 05:53:15,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:53:15,707 INFO L225 Difference]: With dead ends: 59 [2023-11-29 05:53:15,707 INFO L226 Difference]: Without dead ends: 36 [2023-11-29 05:53:15,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:53:15,709 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 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 05:53:15,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:53:15,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-29 05:53:15,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-29 05:53:15,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 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 05:53:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-11-29 05:53:15,715 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 48 [2023-11-29 05:53:15,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:53:15,716 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-11-29 05:53:15,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-29 05:53:15,716 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-11-29 05:53:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 05:53:15,717 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:53:15,717 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:53:15,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:53:15,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:15,922 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:53:15,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:53:15,923 INFO L85 PathProgramCache]: Analyzing trace with hash -987209395, now seen corresponding path program 3 times [2023-11-29 05:53:15,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:53:15,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141316702] [2023-11-29 05:53:15,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:15,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:53:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:16,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-29 05:53:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:16,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-29 05:53:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:16,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-29 05:53:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-29 05:53:16,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:53:16,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141316702] [2023-11-29 05:53:16,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141316702] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:53:16,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539123194] [2023-11-29 05:53:16,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:53:16,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:16,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:53:16,089 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:53:16,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:53:16,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 05:53:16,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:53:16,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:53:16,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:53:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-29 05:53:16,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:53:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-11-29 05:53:16,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539123194] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:53:16,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:53:16,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 05:53:16,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711036321] [2023-11-29 05:53:16,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:53:16,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:53:16,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:53:16,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:53:16,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:53:16,279 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 05:53:16,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:53:16,346 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2023-11-29 05:53:16,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:53:16,346 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2023-11-29 05:53:16,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:53:16,347 INFO L225 Difference]: With dead ends: 67 [2023-11-29 05:53:16,347 INFO L226 Difference]: Without dead ends: 45 [2023-11-29 05:53:16,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:53:16,348 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:53:16,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 126 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:53:16,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-29 05:53:16,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2023-11-29 05:53:16,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 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 05:53:16,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2023-11-29 05:53:16,356 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 55 [2023-11-29 05:53:16,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:53:16,356 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2023-11-29 05:53:16,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-29 05:53:16,356 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2023-11-29 05:53:16,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 05:53:16,357 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:53:16,357 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:53:16,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 05:53:16,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:16,558 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:53:16,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:53:16,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1647632556, now seen corresponding path program 4 times [2023-11-29 05:53:16,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:53:16,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504232209] [2023-11-29 05:53:16,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:16,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:53:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:16,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-29 05:53:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:16,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-29 05:53:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:16,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-29 05:53:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-11-29 05:53:16,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:53:16,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504232209] [2023-11-29 05:53:16,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504232209] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:53:16,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983649300] [2023-11-29 05:53:16,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:53:16,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:16,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:53:16,765 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:53:16,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:53:16,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:53:16,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:53:16,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:53:16,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:53:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-11-29 05:53:16,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:53:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-11-29 05:53:16,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983649300] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:53:16,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:53:16,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-11-29 05:53:16,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983174003] [2023-11-29 05:53:16,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:53:16,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:53:16,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:53:16,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:53:16,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:53:16,966 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 05:53:17,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:53:17,017 INFO L93 Difference]: Finished difference Result 87 states and 112 transitions. [2023-11-29 05:53:17,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:53:17,018 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2023-11-29 05:53:17,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:53:17,019 INFO L225 Difference]: With dead ends: 87 [2023-11-29 05:53:17,019 INFO L226 Difference]: Without dead ends: 58 [2023-11-29 05:53:17,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:53:17,020 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:53:17,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 40 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:53:17,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-29 05:53:17,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-11-29 05:53:17,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 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 05:53:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2023-11-29 05:53:17,029 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 68 [2023-11-29 05:53:17,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:53:17,029 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2023-11-29 05:53:17,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 05:53:17,030 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2023-11-29 05:53:17,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-29 05:53:17,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:53:17,032 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 10, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:53:17,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:53:17,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:17,236 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:53:17,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:53:17,236 INFO L85 PathProgramCache]: Analyzing trace with hash 997688685, now seen corresponding path program 5 times [2023-11-29 05:53:17,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:53:17,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370828294] [2023-11-29 05:53:17,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:17,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:53:17,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:17,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-29 05:53:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:17,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-29 05:53:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:17,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-29 05:53:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 0 proven. 514 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2023-11-29 05:53:17,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:53:17,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370828294] [2023-11-29 05:53:17,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370828294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:53:17,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656632407] [2023-11-29 05:53:17,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:53:17,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:17,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:53:17,644 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:53:17,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:53:18,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2023-11-29 05:53:18,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:53:18,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:53:18,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:53:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 420 proven. 92 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2023-11-29 05:53:18,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:53:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 0 proven. 514 refuted. 0 times theorem prover too weak. 474 trivial. 0 not checked. [2023-11-29 05:53:18,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656632407] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:53:18,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:53:18,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2023-11-29 05:53:18,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532140287] [2023-11-29 05:53:18,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:53:18,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:53:18,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:53:18,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:53:18,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:53:18,441 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 05:53:18,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:53:18,516 INFO L93 Difference]: Finished difference Result 108 states and 137 transitions. [2023-11-29 05:53:18,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 05:53:18,516 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2023-11-29 05:53:18,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:53:18,518 INFO L225 Difference]: With dead ends: 108 [2023-11-29 05:53:18,518 INFO L226 Difference]: Without dead ends: 64 [2023-11-29 05:53:18,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 223 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:53:18,519 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:53:18,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 87 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:53:18,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-29 05:53:18,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-29 05:53:18,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.2203389830508475) internal successors, (72), 59 states have internal predecessors, (72), 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 05:53:18,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2023-11-29 05:53:18,527 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 113 [2023-11-29 05:53:18,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:53:18,528 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2023-11-29 05:53:18,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-29 05:53:18,528 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2023-11-29 05:53:18,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-29 05:53:18,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:53:18,530 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 10, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:53:18,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:53:18,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:18,736 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:53:18,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:53:18,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1475703117, now seen corresponding path program 6 times [2023-11-29 05:53:18,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:53:18,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864950417] [2023-11-29 05:53:18,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:18,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:53:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:18,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-29 05:53:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:19,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 05:53:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:19,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-11-29 05:53:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1462 trivial. 0 not checked. [2023-11-29 05:53:19,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:53:19,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864950417] [2023-11-29 05:53:19,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864950417] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:53:19,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531973049] [2023-11-29 05:53:19,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:53:19,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:19,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:53:19,057 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:53:19,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:53:19,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-29 05:53:19,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:53:19,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:53:19,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:53:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 648 proven. 21 refuted. 0 times theorem prover too weak. 814 trivial. 0 not checked. [2023-11-29 05:53:19,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:53:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1462 trivial. 0 not checked. [2023-11-29 05:53:19,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531973049] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:53:19,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:53:19,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2023-11-29 05:53:19,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475454051] [2023-11-29 05:53:19,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:53:19,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:53:19,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:53:19,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:53:19,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:53:19,553 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 05:53:19,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:53:19,578 INFO L93 Difference]: Finished difference Result 107 states and 134 transitions. [2023-11-29 05:53:19,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:53:19,579 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 131 [2023-11-29 05:53:19,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:53:19,580 INFO L225 Difference]: With dead ends: 107 [2023-11-29 05:53:19,580 INFO L226 Difference]: Without dead ends: 67 [2023-11-29 05:53:19,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 260 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:53:19,582 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:53:19,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:53:19,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-29 05:53:19,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-11-29 05:53:19,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 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 05:53:19,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2023-11-29 05:53:19,590 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 131 [2023-11-29 05:53:19,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:53:19,590 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2023-11-29 05:53:19,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-29 05:53:19,591 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2023-11-29 05:53:19,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-29 05:53:19,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:53:19,593 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 10, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:53:19,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 05:53:19,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 05:53:19,796 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:53:19,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:53:19,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1426919793, now seen corresponding path program 7 times [2023-11-29 05:53:19,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:53:19,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115559719] [2023-11-29 05:53:19,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:19,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:53:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:21,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-29 05:53:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:22,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 05:53:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:22,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-11-29 05:53:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 206 proven. 914 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2023-11-29 05:53:22,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:53:22,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115559719] [2023-11-29 05:53:22,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115559719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:53:22,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318783010] [2023-11-29 05:53:22,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:53:22,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:22,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:53:22,896 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:53:22,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:53:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:23,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-29 05:53:23,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:53:23,931 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:53:23,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 20 [2023-11-29 05:53:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 716 proven. 495 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2023-11-29 05:53:24,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:53:25,438 INFO L349 Elim1Store]: treesize reduction 19, result has 70.3 percent of original size [2023-11-29 05:53:25,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2023-11-29 05:53:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 326 proven. 733 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2023-11-29 05:53:25,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318783010] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:53:25,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:53:25,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 32, 14] total 57 [2023-11-29 05:53:25,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904803040] [2023-11-29 05:53:25,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:53:25,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-29 05:53:25,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:53:25,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-29 05:53:25,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=2902, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 05:53:25,528 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 57 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-29 05:53:27,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:53:27,828 INFO L93 Difference]: Finished difference Result 236 states and 291 transitions. [2023-11-29 05:53:27,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 05:53:27,828 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) Word has length 134 [2023-11-29 05:53:27,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:53:27,831 INFO L225 Difference]: With dead ends: 236 [2023-11-29 05:53:27,831 INFO L226 Difference]: Without dead ends: 157 [2023-11-29 05:53:27,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=722, Invalid=5758, Unknown=0, NotChecked=0, Total=6480 [2023-11-29 05:53:27,836 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 116 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 2041 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 2052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:53:27,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 444 Invalid, 2052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2041 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 05:53:27,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-29 05:53:27,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 131. [2023-11-29 05:53:27,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 123 states have (on average 1.2601626016260163) internal successors, (155), 124 states have internal predecessors, (155), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-29 05:53:27,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 166 transitions. [2023-11-29 05:53:27,853 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 166 transitions. Word has length 134 [2023-11-29 05:53:27,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:53:27,854 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 166 transitions. [2023-11-29 05:53:27,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 2.2) internal successors, (121), 54 states have internal predecessors, (121), 5 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-29 05:53:27,854 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 166 transitions. [2023-11-29 05:53:27,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-29 05:53:27,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:53:27,856 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 10, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:53:27,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 05:53:28,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 05:53:28,060 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:53:28,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:53:28,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1186680047, now seen corresponding path program 1 times [2023-11-29 05:53:28,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:53:28,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299666551] [2023-11-29 05:53:28,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:28,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:53:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:32,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-29 05:53:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:33,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 05:53:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:33,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-11-29 05:53:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 341 proven. 956 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-11-29 05:53:35,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:53:35,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299666551] [2023-11-29 05:53:35,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299666551] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:53:35,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050022926] [2023-11-29 05:53:35,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:35,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:35,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:53:35,774 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:53:35,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:53:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:35,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 166 conjunts are in the unsatisfiable core [2023-11-29 05:53:35,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:53:36,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:53:39,660 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:53:39,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 127 treesize of output 104 [2023-11-29 05:53:41,124 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:53:41,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 127 treesize of output 114 [2023-11-29 05:53:41,323 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:53:41,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 127 treesize of output 114 [2023-11-29 05:53:41,524 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:53:41,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 127 treesize of output 107 [2023-11-29 05:53:41,713 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:53:41,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 127 treesize of output 107 [2023-11-29 05:53:41,949 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:53:41,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 127 treesize of output 107 [2023-11-29 05:53:42,162 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:53:42,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 127 treesize of output 107 [2023-11-29 05:53:42,357 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:53:42,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 127 treesize of output 107 [2023-11-29 05:53:42,590 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:53:42,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 127 treesize of output 107 [2023-11-29 05:53:42,822 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:53:42,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 127 treesize of output 107 [2023-11-29 05:53:43,039 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:53:43,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 131 treesize of output 104 [2023-11-29 05:53:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 7 proven. 1355 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-29 05:53:47,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:53:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 445 proven. 859 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-11-29 05:53:58,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050022926] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:53:58,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:53:58,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 68, 55] total 167 [2023-11-29 05:53:58,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482946912] [2023-11-29 05:53:58,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:53:58,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2023-11-29 05:53:58,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:53:58,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2023-11-29 05:53:58,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=26594, Unknown=0, NotChecked=0, Total=27722 [2023-11-29 05:53:58,761 INFO L87 Difference]: Start difference. First operand 131 states and 166 transitions. Second operand has 167 states, 164 states have (on average 1.5121951219512195) internal successors, (248), 163 states have internal predecessors, (248), 8 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-29 05:55:47,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:55:47,157 INFO L93 Difference]: Finished difference Result 1593 states and 2114 transitions. [2023-11-29 05:55:47,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 503 states. [2023-11-29 05:55:47,158 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 164 states have (on average 1.5121951219512195) internal successors, (248), 163 states have internal predecessors, (248), 8 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 134 [2023-11-29 05:55:47,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:55:47,169 INFO L225 Difference]: With dead ends: 1593 [2023-11-29 05:55:47,169 INFO L226 Difference]: Without dead ends: 1527 [2023-11-29 05:55:47,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 614 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137597 ImplicationChecksByTransitivity, 107.9s TimeCoverageRelationStatistics Valid=19147, Invalid=359693, Unknown=0, NotChecked=0, Total=378840 [2023-11-29 05:55:47,201 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 761 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 15196 mSolverCounterSat, 545 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 15741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 545 IncrementalHoareTripleChecker+Valid, 15196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time [2023-11-29 05:55:47,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 1144 Invalid, 15741 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [545 Valid, 15196 Invalid, 0 Unknown, 0 Unchecked, 18.9s Time] [2023-11-29 05:55:47,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2023-11-29 05:55:47,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 631. [2023-11-29 05:55:47,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 595 states have (on average 1.2957983193277312) internal successors, (771), 607 states have internal predecessors, (771), 16 states have call successors, (16), 6 states have call predecessors, (16), 19 states have return successors, (109), 17 states have call predecessors, (109), 16 states have call successors, (109) [2023-11-29 05:55:47,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 896 transitions. [2023-11-29 05:55:47,351 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 896 transitions. Word has length 134 [2023-11-29 05:55:47,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:55:47,352 INFO L495 AbstractCegarLoop]: Abstraction has 631 states and 896 transitions. [2023-11-29 05:55:47,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 164 states have (on average 1.5121951219512195) internal successors, (248), 163 states have internal predecessors, (248), 8 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-29 05:55:47,352 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 896 transitions. [2023-11-29 05:55:47,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-29 05:55:47,360 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:55:47,361 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 28, 10, 9, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:55:47,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 05:55:47,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 05:55:47,563 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:55:47,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:47,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1996026673, now seen corresponding path program 2 times [2023-11-29 05:55:47,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:47,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774835135] [2023-11-29 05:55:47,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:47,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:53,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-29 05:55:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:55,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 05:55:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:56,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-11-29 05:55:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 0 proven. 1480 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 05:55:57,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:55:57,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774835135] [2023-11-29 05:55:57,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774835135] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:55:57,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670932201] [2023-11-29 05:55:57,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:55:57,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:55:57,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:55:57,719 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:55:57,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:55:58,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:55:58,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:55:58,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 275 conjunts are in the unsatisfiable core [2023-11-29 05:55:58,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:55:58,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 05:56:05,247 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 05:56:05,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 170 treesize of output 130 [2023-11-29 05:56:18,658 INFO L349 Elim1Store]: treesize reduction 92, result has 17.9 percent of original size [2023-11-29 05:56:18,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 20 select indices, 20 select index equivalence classes, 45 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 191 case distinctions, treesize of input 277 treesize of output 258 [2023-11-29 05:56:19,199 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 05:56:19,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 45 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 157 treesize of output 135 [2023-11-29 05:56:19,612 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 05:56:19,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 157 treesize of output 128 [2023-11-29 05:56:20,006 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 05:56:20,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 157 treesize of output 128 [2023-11-29 05:56:20,469 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 05:56:20,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 157 treesize of output 128 [2023-11-29 05:56:21,015 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 05:56:21,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 157 treesize of output 128 [2023-11-29 05:56:21,469 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 05:56:21,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 157 treesize of output 128 [2023-11-29 05:56:21,902 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 05:56:21,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 157 treesize of output 128 [2023-11-29 05:56:22,332 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-29 05:56:22,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 157 treesize of output 128 [2023-11-29 05:56:22,844 INFO L349 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2023-11-29 05:56:22,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 46 case distinctions, treesize of input 157 treesize of output 133 [2023-11-29 05:56:28,653 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:56:28,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 270 treesize of output 182 [2023-11-29 05:56:29,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 1 proven. 1504 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:56:29,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:57:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 31 proven. 1416 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-29 05:57:56,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670932201] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:57:56,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:57:56,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 104, 90] total 260 [2023-11-29 05:57:56,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988623251] [2023-11-29 05:57:56,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:57:56,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 260 states [2023-11-29 05:57:56,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:57:56,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 260 interpolants. [2023-11-29 05:57:56,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1569, Invalid=65762, Unknown=9, NotChecked=0, Total=67340 [2023-11-29 05:57:56,139 INFO L87 Difference]: Start difference. First operand 631 states and 896 transitions. Second operand has 260 states, 247 states have (on average 1.3522267206477734) internal successors, (334), 248 states have internal predecessors, (334), 8 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-29 05:58:00,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:58:04,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:58:08,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:58:12,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:58:17,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:58:21,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:58:25,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:58:30,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:58:34,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:58:38,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:02:00,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:02:04,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:02:08,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:02:12,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:02:16,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:05:40,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:05:40,742 INFO L93 Difference]: Finished difference Result 2083 states and 3048 transitions. [2023-11-29 06:05:40,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 458 states. [2023-11-29 06:05:40,743 INFO L78 Accepts]: Start accepts. Automaton has has 260 states, 247 states have (on average 1.3522267206477734) internal successors, (334), 248 states have internal predecessors, (334), 8 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 134 [2023-11-29 06:05:40,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:05:40,754 INFO L225 Difference]: With dead ends: 2083 [2023-11-29 06:05:40,754 INFO L226 Difference]: Without dead ends: 2071 [2023-11-29 06:05:40,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 639 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139288 ImplicationChecksByTransitivity, 466.3s TimeCoverageRelationStatistics Valid=10919, Invalid=399312, Unknown=9, NotChecked=0, Total=410240 [2023-11-29 06:05:40,789 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 774 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 26074 mSolverCounterSat, 1464 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 27553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1464 IncrementalHoareTripleChecker+Valid, 26074 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 103.8s IncrementalHoareTripleChecker+Time [2023-11-29 06:05:40,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [790 Valid, 920 Invalid, 27553 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1464 Valid, 26074 Invalid, 15 Unknown, 0 Unchecked, 103.8s Time] [2023-11-29 06:05:40,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2023-11-29 06:05:41,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1106. [2023-11-29 06:05:41,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 1033 states have (on average 1.3000968054211035) internal successors, (1343), 1061 states have internal predecessors, (1343), 32 states have call successors, (32), 9 states have call predecessors, (32), 40 states have return successors, (253), 35 states have call predecessors, (253), 32 states have call successors, (253) [2023-11-29 06:05:41,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1628 transitions. [2023-11-29 06:05:41,238 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1628 transitions. Word has length 134 [2023-11-29 06:05:41,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:05:41,238 INFO L495 AbstractCegarLoop]: Abstraction has 1106 states and 1628 transitions. [2023-11-29 06:05:41,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 260 states, 247 states have (on average 1.3522267206477734) internal successors, (334), 248 states have internal predecessors, (334), 8 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-29 06:05:41,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1628 transitions. [2023-11-29 06:05:41,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-29 06:05:41,250 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:05:41,251 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 27, 10, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:05:41,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:05:41,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 06:05:41,451 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:05:41,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:05:41,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1294962095, now seen corresponding path program 3 times [2023-11-29 06:05:41,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:05:41,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402426693] [2023-11-29 06:05:41,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:05:41,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:05:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:45,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-29 06:05:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:45,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-29 06:05:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:45,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-11-29 06:05:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:05:46,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 648 proven. 689 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2023-11-29 06:05:46,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:05:46,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402426693] [2023-11-29 06:05:46,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402426693] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:05:46,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170338167] [2023-11-29 06:05:46,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:05:46,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:05:46,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:05:46,480 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:05:46,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c471ef42-ccd7-4ead-bb1b-af5fc89ea3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:05:48,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-11-29 06:05:48,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:05:48,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 91 conjunts are in the unsatisfiable core [2023-11-29 06:05:48,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:05:49,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:05:49,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:05:49,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:05:49,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:05:49,092 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:05:49,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 40 [2023-11-29 06:05:49,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:05:49,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:05:49,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:05:49,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:05:49,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:05:49,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:05:49,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:05:49,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:05:49,239 INFO L349 Elim1Store]: treesize reduction 54, result has 33.3 percent of original size [2023-11-29 06:05:49,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 52 treesize of output 69 [2023-11-29 06:05:49,895 INFO L349 Elim1Store]: treesize reduction 294, result has 42.0 percent of original size [2023-11-29 06:05:49,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 2 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 110 treesize of output 271