./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/count_up_down-1.c --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_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/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_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/count_up_down-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/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_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/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 5879e48447fc7f125bd26345b332bcb57cae00365c3de30b5785162154970826 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:25:14,602 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:25:14,667 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:25:14,671 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:25:14,672 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:25:14,696 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:25:14,696 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:25:14,697 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:25:14,698 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:25:14,698 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:25:14,699 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:25:14,699 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:25:14,700 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:25:14,700 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:25:14,701 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:25:14,702 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:25:14,702 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:25:14,703 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:25:14,703 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:25:14,703 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:25:14,704 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:25:14,704 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:25:14,705 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:25:14,705 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:25:14,706 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:25:14,706 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:25:14,706 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:25:14,707 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:25:14,707 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:25:14,708 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:25:14,708 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:25:14,708 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:25:14,709 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:25:14,709 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:25:14,709 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:25:14,709 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:25:14,710 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:25:14,710 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:25:14,710 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:25:14,710 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:25:14,710 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:25:14,711 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:25:14,711 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_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5879e48447fc7f125bd26345b332bcb57cae00365c3de30b5785162154970826 [2023-11-29 05:25:14,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:25:14,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:25:14,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:25:14,955 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:25:14,956 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:25:14,957 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/loops/count_up_down-1.c [2023-11-29 05:25:17,706 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:25:17,867 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:25:17,868 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/sv-benchmarks/c/loops/count_up_down-1.c [2023-11-29 05:25:17,873 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/data/4cd9bc769/189b922f64614b23a5e165f594a745a1/FLAG8dce61891 [2023-11-29 05:25:17,884 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/data/4cd9bc769/189b922f64614b23a5e165f594a745a1 [2023-11-29 05:25:17,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:25:17,887 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:25:17,888 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:25:17,889 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:25:17,894 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:25:17,895 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:25:17" (1/1) ... [2023-11-29 05:25:17,896 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@226ba8e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:17, skipping insertion in model container [2023-11-29 05:25:17,896 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:25:17" (1/1) ... [2023-11-29 05:25:17,914 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:25:18,032 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_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/sv-benchmarks/c/loops/count_up_down-1.c[327,340] [2023-11-29 05:25:18,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:25:18,053 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:25:18,066 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_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/sv-benchmarks/c/loops/count_up_down-1.c[327,340] [2023-11-29 05:25:18,068 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:25:18,081 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:25:18,082 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:18 WrapperNode [2023-11-29 05:25:18,082 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:25:18,083 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:25:18,083 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:25:18,083 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:25:18,089 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:18" (1/1) ... [2023-11-29 05:25:18,097 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:18" (1/1) ... [2023-11-29 05:25:18,110 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 31 [2023-11-29 05:25:18,111 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:25:18,111 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:25:18,111 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:25:18,112 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:25:18,119 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:18" (1/1) ... [2023-11-29 05:25:18,119 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:18" (1/1) ... [2023-11-29 05:25:18,120 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:18" (1/1) ... [2023-11-29 05:25:18,128 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 05:25:18,128 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:18" (1/1) ... [2023-11-29 05:25:18,129 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:18" (1/1) ... [2023-11-29 05:25:18,131 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:18" (1/1) ... [2023-11-29 05:25:18,134 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:18" (1/1) ... [2023-11-29 05:25:18,135 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:18" (1/1) ... [2023-11-29 05:25:18,136 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:18" (1/1) ... [2023-11-29 05:25:18,137 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:25:18,138 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:25:18,138 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:25:18,138 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:25:18,139 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:18" (1/1) ... [2023-11-29 05:25:18,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:25:18,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:25:18,168 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:25:18,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:25:18,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:25:18,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:25:18,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:25:18,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:25:18,266 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:25:18,269 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:25:18,368 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:25:18,390 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:25:18,390 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 05:25:18,391 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:25:18 BoogieIcfgContainer [2023-11-29 05:25:18,391 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:25:18,395 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:25:18,395 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:25:18,399 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:25:18,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:25:17" (1/3) ... [2023-11-29 05:25:18,400 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb6de53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:25:18, skipping insertion in model container [2023-11-29 05:25:18,400 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:18" (2/3) ... [2023-11-29 05:25:18,401 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb6de53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:25:18, skipping insertion in model container [2023-11-29 05:25:18,401 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:25:18" (3/3) ... [2023-11-29 05:25:18,402 INFO L112 eAbstractionObserver]: Analyzing ICFG count_up_down-1.c [2023-11-29 05:25:18,423 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:25:18,423 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:25:18,473 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:25:18,480 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;@38ad70ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:25:18,480 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 05:25:18,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:18,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 05:25:18,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:25:18,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 05:25:18,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:25:18,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:18,498 INFO L85 PathProgramCache]: Analyzing trace with hash 57541414, now seen corresponding path program 1 times [2023-11-29 05:25:18,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:25:18,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880234766] [2023-11-29 05:25:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:18,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:25:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:18,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:25:18,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880234766] [2023-11-29 05:25:18,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880234766] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:25:18,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:25:18,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:25:18,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903124170] [2023-11-29 05:25:18,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:25:18,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:25:18,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:25:18,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:25:18,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:25:18,984 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:19,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:25:19,060 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2023-11-29 05:25:19,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:25:19,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-29 05:25:19,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:25:19,069 INFO L225 Difference]: With dead ends: 18 [2023-11-29 05:25:19,069 INFO L226 Difference]: Without dead ends: 7 [2023-11-29 05:25:19,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:25:19,074 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:25:19,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 10 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:25:19,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2023-11-29 05:25:19,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2023-11-29 05:25:19,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:19,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2023-11-29 05:25:19,099 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2023-11-29 05:25:19,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:25:19,100 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2023-11-29 05:25:19,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:19,100 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2023-11-29 05:25:19,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 05:25:19,101 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:25:19,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 05:25:19,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:25:19,102 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:25:19,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:19,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1785449205, now seen corresponding path program 1 times [2023-11-29 05:25:19,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:25:19,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069483089] [2023-11-29 05:25:19,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:19,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:25:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:19,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:25:19,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069483089] [2023-11-29 05:25:19,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069483089] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:25:19,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600937421] [2023-11-29 05:25:19,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:19,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:25:19,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:25:19,424 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:25:19,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:25:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:19,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:25:19,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:25:19,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:19,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:25:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:19,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600937421] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:25:19,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:25:19,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-29 05:25:19,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366190311] [2023-11-29 05:25:19,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:25:19,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:25:19,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:25:19,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:25:19,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:25:19,704 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:19,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:25:19,920 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2023-11-29 05:25:19,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:25:19,921 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-29 05:25:19,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:25:19,921 INFO L225 Difference]: With dead ends: 16 [2023-11-29 05:25:19,922 INFO L226 Difference]: Without dead ends: 10 [2023-11-29 05:25:19,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:25:19,924 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:25:19,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 12 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:25:19,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-29 05:25:19,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-29 05:25:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:19,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2023-11-29 05:25:19,930 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2023-11-29 05:25:19,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:25:19,930 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2023-11-29 05:25:19,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:19,931 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2023-11-29 05:25:19,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 05:25:19,931 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:25:19,931 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2023-11-29 05:25:19,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:25:20,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:25:20,137 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:25:20,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:20,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1198981402, now seen corresponding path program 2 times [2023-11-29 05:25:20,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:25:20,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181599176] [2023-11-29 05:25:20,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:20,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:25:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:20,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:20,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:25:20,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181599176] [2023-11-29 05:25:20,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181599176] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:25:20,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513373842] [2023-11-29 05:25:20,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:25:20,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:25:20,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:25:20,752 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:25:20,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:25:20,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:25:20,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:25:20,823 WARN L260 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 05:25:20,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:25:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:21,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:25:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:21,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513373842] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:25:21,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:25:21,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-29 05:25:21,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666916415] [2023-11-29 05:25:21,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:25:21,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:25:21,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:25:21,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:25:21,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:25:21,458 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 21 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:24,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:25:24,263 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2023-11-29 05:25:24,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 05:25:24,264 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-29 05:25:24,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:25:24,265 INFO L225 Difference]: With dead ends: 24 [2023-11-29 05:25:24,265 INFO L226 Difference]: Without dead ends: 16 [2023-11-29 05:25:24,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 05:25:24,266 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 41 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:25:24,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 27 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:25:24,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-29 05:25:24,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-29 05:25:24,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:24,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2023-11-29 05:25:24,280 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 9 [2023-11-29 05:25:24,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:25:24,281 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2023-11-29 05:25:24,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:24,281 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2023-11-29 05:25:24,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 05:25:24,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:25:24,282 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2023-11-29 05:25:24,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:25:24,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:25:24,483 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:25:24,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:24,484 INFO L85 PathProgramCache]: Analyzing trace with hash 533804166, now seen corresponding path program 3 times [2023-11-29 05:25:24,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:25:24,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683481886] [2023-11-29 05:25:24,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:24,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:25:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:25,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:25:25,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683481886] [2023-11-29 05:25:25,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683481886] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:25:25,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590675642] [2023-11-29 05:25:25,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:25:25,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:25:25,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:25:25,532 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:25:25,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:25:25,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 05:25:25,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:25:25,893 WARN L260 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-29 05:25:25,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:25:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:26,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:25:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:28,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590675642] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:25:28,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:25:28,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2023-11-29 05:25:28,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838429780] [2023-11-29 05:25:28,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:25:28,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 05:25:28,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:25:28,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 05:25:28,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1149, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 05:25:28,154 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 39 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:56,003 WARN L293 SmtUtils]: Spent 6.78s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 05:27:34,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:27:34,101 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2023-11-29 05:27:34,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 05:27:34,103 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-29 05:27:34,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:27:34,103 INFO L225 Difference]: With dead ends: 36 [2023-11-29 05:27:34,103 INFO L226 Difference]: Without dead ends: 28 [2023-11-29 05:27:34,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 127.1s TimeCoverageRelationStatistics Valid=901, Invalid=2290, Unknown=1, NotChecked=0, Total=3192 [2023-11-29 05:27:34,105 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 116 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:27:34,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 15 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 05:27:34,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-29 05:27:34,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-29 05:27:34,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:34,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2023-11-29 05:27:34,119 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 15 [2023-11-29 05:27:34,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:27:34,119 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2023-11-29 05:27:34,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:34,120 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2023-11-29 05:27:34,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 05:27:34,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:27:34,121 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2023-11-29 05:27:34,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:27:34,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:34,321 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:27:34,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:34,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1731758138, now seen corresponding path program 4 times [2023-11-29 05:27:34,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:27:34,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981325587] [2023-11-29 05:27:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:34,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:27:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:36,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:27:36,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981325587] [2023-11-29 05:27:36,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981325587] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:27:36,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069440147] [2023-11-29 05:27:36,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:27:36,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:27:36,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:27:36,948 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:27:36,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bf8b95a-c5be-4e6b-994a-99cfd52b7b74/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:27:39,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:27:39,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:39,996 WARN L260 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 104 conjunts are in the unsatisfiable core [2023-11-29 05:27:39,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:42,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:51,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069440147] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:51,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:27:51,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 70 [2023-11-29 05:27:51,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558842198] [2023-11-29 05:27:51,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:51,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-29 05:27:51,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:27:51,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-29 05:27:51,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1125, Invalid=3845, Unknown=0, NotChecked=0, Total=4970 [2023-11-29 05:27:51,421 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 71 states, 71 states have (on average 1.028169014084507) internal successors, (73), 70 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:32:41,908 WARN L293 SmtUtils]: Spent 1.19m on a formula simplification that was a NOOP. DAG size: 226 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 05:36:16,198 WARN L293 SmtUtils]: Spent 2.02m on a formula simplification. DAG size of input: 213 DAG size of output: 103 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 05:36:19,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 05:36:20,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []