./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.10.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.10.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fe770310c82cf9cfe74a9cf613e502cabffaf8c78b339172b16bd6473cdffdfc --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:31:47,045 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:31:47,135 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:31:47,143 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:31:47,147 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:31:47,192 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:31:47,194 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:31:47,195 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:31:47,196 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:31:47,198 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:31:47,198 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:31:47,199 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:31:47,199 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:31:47,199 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:31:47,202 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:31:47,202 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:31:47,203 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:31:47,203 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:31:47,203 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:31:47,204 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:31:47,204 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:31:47,208 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:31:47,209 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:31:47,209 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:31:47,210 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:31:47,210 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:31:47,210 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:31:47,211 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:31:47,211 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:31:47,211 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:31:47,211 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:31:47,212 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:31:47,213 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:31:47,213 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:31:47,214 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:31:47,214 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:31:47,214 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:31:47,214 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:31:47,215 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:31:47,215 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:31:47,215 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:31:47,217 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:31:47,217 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:31:47,218 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:31:47,219 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:31:47,219 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:31:47,220 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:31:47,220 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe770310c82cf9cfe74a9cf613e502cabffaf8c78b339172b16bd6473cdffdfc [2024-11-02 12:31:47,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:31:47,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:31:47,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:31:47,531 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:31:47,531 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:31:47,533 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.10.cil-1.c Unable to find full path for "g++" [2024-11-02 12:31:49,939 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:31:50,730 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:31:50,732 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/sv-benchmarks/c/combinations/Problem05_label42+token_ring.10.cil-1.c [2024-11-02 12:31:50,798 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2/data/ce3268d1b/018dbfcd68f047e69f98d32f776e93dd/FLAG5741a6d8e [2024-11-02 12:31:50,821 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2/data/ce3268d1b/018dbfcd68f047e69f98d32f776e93dd [2024-11-02 12:31:50,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:31:50,828 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:31:50,832 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:31:50,833 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:31:50,840 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:31:50,841 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:31:50" (1/1) ... [2024-11-02 12:31:50,845 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@401d3736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:50, skipping insertion in model container [2024-11-02 12:31:50,845 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:31:50" (1/1) ... [2024-11-02 12:31:51,082 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:31:53,875 WARN L251 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_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/sv-benchmarks/c/combinations/Problem05_label42+token_ring.10.cil-1.c[378560,378573] [2024-11-02 12:31:53,912 WARN L251 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_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/sv-benchmarks/c/combinations/Problem05_label42+token_ring.10.cil-1.c[383339,383352] [2024-11-02 12:31:54,272 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:31:54,291 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:31:55,566 WARN L251 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_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/sv-benchmarks/c/combinations/Problem05_label42+token_ring.10.cil-1.c[378560,378573] [2024-11-02 12:31:55,575 WARN L251 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_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/sv-benchmarks/c/combinations/Problem05_label42+token_ring.10.cil-1.c[383339,383352] [2024-11-02 12:31:55,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:31:55,698 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:31:55,698 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:55 WrapperNode [2024-11-02 12:31:55,699 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:31:55,700 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:31:55,700 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:31:55,700 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:31:55,709 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:55" (1/1) ... [2024-11-02 12:31:55,814 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:55" (1/1) ... [2024-11-02 12:31:56,204 INFO L138 Inliner]: procedures = 64, calls = 72, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 13119 [2024-11-02 12:31:56,205 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:31:56,205 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:31:56,206 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:31:56,206 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:31:56,217 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:55" (1/1) ... [2024-11-02 12:31:56,217 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:55" (1/1) ... [2024-11-02 12:31:56,372 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:55" (1/1) ... [2024-11-02 12:31:56,373 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:55" (1/1) ... [2024-11-02 12:31:56,594 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:55" (1/1) ... [2024-11-02 12:31:56,662 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:55" (1/1) ... [2024-11-02 12:31:56,697 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:55" (1/1) ... [2024-11-02 12:31:56,728 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:55" (1/1) ... [2024-11-02 12:31:56,822 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:31:56,823 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:31:56,823 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:31:56,824 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:31:56,825 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:55" (1/1) ... [2024-11-02 12:31:56,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:31:56,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:31:56,863 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:31:56,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:31:56,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:31:56,905 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-02 12:31:56,905 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-02 12:31:56,905 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-02 12:31:56,905 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-02 12:31:56,906 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-02 12:31:56,906 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-02 12:31:56,906 INFO L130 BoogieDeclarations]: Found specification of procedure error [2024-11-02 12:31:56,906 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2024-11-02 12:31:56,906 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-02 12:31:56,907 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-02 12:31:56,907 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-02 12:31:56,907 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-02 12:31:56,908 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-02 12:31:56,908 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-02 12:31:56,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:31:56,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:31:56,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:31:57,098 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:31:57,101 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:32:08,447 INFO L? ?]: Removed 1747 outVars from TransFormulas that were not future-live. [2024-11-02 12:32:08,448 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:32:11,254 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:32:11,254 INFO L316 CfgBuilder]: Removed 14 assume(true) statements. [2024-11-02 12:32:11,255 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:32:11 BoogieIcfgContainer [2024-11-02 12:32:11,255 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:32:11,257 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:32:11,257 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:32:11,261 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:32:11,261 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:31:50" (1/3) ... [2024-11-02 12:32:11,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1e19ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:32:11, skipping insertion in model container [2024-11-02 12:32:11,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:55" (2/3) ... [2024-11-02 12:32:11,267 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1e19ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:32:11, skipping insertion in model container [2024-11-02 12:32:11,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:32:11" (3/3) ... [2024-11-02 12:32:11,268 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.10.cil-1.c [2024-11-02 12:32:11,291 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:32:11,292 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-02 12:32:11,421 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:32:11,428 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, 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;@b6d4ad2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:32:11,429 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-02 12:32:11,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 1826 states, 1790 states have (on average 1.9541899441340782) internal successors, (3498), 1795 states have internal predecessors, (3498), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-02 12:32:11,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-02 12:32:11,458 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:11,459 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:32:11,460 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:11,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:11,466 INFO L85 PathProgramCache]: Analyzing trace with hash 908161013, now seen corresponding path program 1 times [2024-11-02 12:32:11,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:11,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072540279] [2024-11-02 12:32:11,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:11,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:12,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:12,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:12,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072540279] [2024-11-02 12:32:12,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072540279] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:12,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:12,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:32:12,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336646203] [2024-11-02 12:32:12,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:12,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:32:12,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:12,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:32:12,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:32:12,231 INFO L87 Difference]: Start difference. First operand has 1826 states, 1790 states have (on average 1.9541899441340782) internal successors, (3498), 1795 states have internal predecessors, (3498), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 12:32:13,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:13,518 INFO L93 Difference]: Finished difference Result 3811 states and 7368 transitions. [2024-11-02 12:32:13,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:32:13,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2024-11-02 12:32:13,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:13,552 INFO L225 Difference]: With dead ends: 3811 [2024-11-02 12:32:13,552 INFO L226 Difference]: Without dead ends: 1984 [2024-11-02 12:32:13,564 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:32:13,570 INFO L432 NwaCegarLoop]: 3480 mSDtfsCounter, 3743 mSDsluCounter, 3388 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3743 SdHoareTripleChecker+Valid, 6868 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:13,572 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3743 Valid, 6868 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-02 12:32:13,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2024-11-02 12:32:13,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1983. [2024-11-02 12:32:13,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1923 states have (on average 1.9157566302652107) internal successors, (3684), 1927 states have internal predecessors, (3684), 46 states have call successors, (46), 13 states have call predecessors, (46), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2024-11-02 12:32:13,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 3774 transitions. [2024-11-02 12:32:13,740 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 3774 transitions. Word has length 62 [2024-11-02 12:32:13,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:13,741 INFO L471 AbstractCegarLoop]: Abstraction has 1983 states and 3774 transitions. [2024-11-02 12:32:13,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 12:32:13,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 3774 transitions. [2024-11-02 12:32:13,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-02 12:32:13,753 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:13,754 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:32:13,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:32:13,754 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:13,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:13,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1103996195, now seen corresponding path program 1 times [2024-11-02 12:32:13,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:13,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496180749] [2024-11-02 12:32:13,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:13,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 12:32:14,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:14,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496180749] [2024-11-02 12:32:14,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496180749] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:32:14,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398188289] [2024-11-02 12:32:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:14,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:32:14,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:32:14,235 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:32:14,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:32:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:14,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:32:14,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:32:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 12:32:14,629 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:32:14,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398188289] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:14,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:32:14,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-02 12:32:14,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191567349] [2024-11-02 12:32:14,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:14,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:32:14,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:14,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:32:14,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:32:14,636 INFO L87 Difference]: Start difference. First operand 1983 states and 3774 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 12:32:15,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:15,272 INFO L93 Difference]: Finished difference Result 2650 states and 4785 transitions. [2024-11-02 12:32:15,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:32:15,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 124 [2024-11-02 12:32:15,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:15,289 INFO L225 Difference]: With dead ends: 2650 [2024-11-02 12:32:15,289 INFO L226 Difference]: Without dead ends: 2313 [2024-11-02 12:32:15,291 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:32:15,294 INFO L432 NwaCegarLoop]: 3333 mSDtfsCounter, 3490 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3490 SdHoareTripleChecker+Valid, 3546 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:15,295 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3490 Valid, 3546 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-02 12:32:15,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2024-11-02 12:32:15,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2307. [2024-11-02 12:32:15,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2197 states have (on average 1.859353664087392) internal successors, (4085), 2202 states have internal predecessors, (4085), 84 states have call successors, (84), 25 states have call predecessors, (84), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2024-11-02 12:32:15,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 4251 transitions. [2024-11-02 12:32:15,382 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 4251 transitions. Word has length 124 [2024-11-02 12:32:15,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:15,383 INFO L471 AbstractCegarLoop]: Abstraction has 2307 states and 4251 transitions. [2024-11-02 12:32:15,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 12:32:15,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 4251 transitions. [2024-11-02 12:32:15,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-02 12:32:15,393 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:15,393 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:32:15,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:32:15,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:32:15,594 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:15,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:15,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1217601661, now seen corresponding path program 1 times [2024-11-02 12:32:15,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:15,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466630988] [2024-11-02 12:32:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:15,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 12:32:15,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:15,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466630988] [2024-11-02 12:32:15,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466630988] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:32:15,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465919555] [2024-11-02 12:32:15,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:15,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:32:15,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:32:15,802 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:32:15,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d43f4c-4c1a-4bda-ba0e-dddbe049b42b/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process