./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.02.cil-2.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_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/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_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.02.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/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_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/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 454b29c5fe5071d16700d38fede778ad07010669479cf8e19070acab5fe681c9 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:27:00,705 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:27:00,800 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:27:00,808 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:27:00,809 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:27:00,841 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:27:00,842 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:27:00,842 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:27:00,843 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:27:00,846 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:27:00,846 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:27:00,847 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:27:00,847 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:27:00,847 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:27:00,848 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:27:00,852 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:27:00,852 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:27:00,853 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:27:00,853 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:27:00,854 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:27:00,854 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:27:00,855 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:27:00,855 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:27:00,856 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:27:00,856 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:27:00,856 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:27:00,857 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:27:00,857 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:27:00,858 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:27:00,858 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:27:00,858 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:27:00,859 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:27:00,859 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:27:00,860 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:27:00,860 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:27:00,860 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:27:00,861 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:27:00,861 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:27:00,861 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:27:00,862 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:27:00,862 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:27:00,863 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:27:00,863 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:27:00,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:27:00,864 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:27:00,864 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:27:00,864 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:27:00,865 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_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 454b29c5fe5071d16700d38fede778ad07010669479cf8e19070acab5fe681c9 [2024-11-02 12:27:01,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:27:01,224 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:27:01,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:27:01,231 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:27:01,231 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:27:01,233 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.02.cil-2.c Unable to find full path for "g++" [2024-11-02 12:27:03,602 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:27:04,425 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:27:04,426 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/sv-benchmarks/c/combinations/Problem05_label49+token_ring.02.cil-2.c [2024-11-02 12:27:04,484 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/bin/utaipan-verify-DbMuA5NWw2/data/225e6b8e5/0ed60fd64e4e40108bf91ed41f164243/FLAG3d450c15a [2024-11-02 12:27:04,506 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/bin/utaipan-verify-DbMuA5NWw2/data/225e6b8e5/0ed60fd64e4e40108bf91ed41f164243 [2024-11-02 12:27:04,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:27:04,511 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:27:04,514 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:27:04,514 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:27:04,520 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:27:04,521 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:27:04" (1/1) ... [2024-11-02 12:27:04,523 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47367c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:04, skipping insertion in model container [2024-11-02 12:27:04,523 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:27:04" (1/1) ... [2024-11-02 12:27:04,791 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:27:07,098 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_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/sv-benchmarks/c/combinations/Problem05_label49+token_ring.02.cil-2.c[380593,380606] [2024-11-02 12:27:07,128 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_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/sv-benchmarks/c/combinations/Problem05_label49+token_ring.02.cil-2.c[383339,383352] [2024-11-02 12:27:07,310 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:27:07,320 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:27:08,526 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_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/sv-benchmarks/c/combinations/Problem05_label49+token_ring.02.cil-2.c[380593,380606] [2024-11-02 12:27:08,532 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_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/sv-benchmarks/c/combinations/Problem05_label49+token_ring.02.cil-2.c[383339,383352] [2024-11-02 12:27:08,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:27:08,637 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:27:08,638 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:08 WrapperNode [2024-11-02 12:27:08,639 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:27:08,640 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:27:08,640 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:27:08,640 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:27:08,649 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:08" (1/1) ... [2024-11-02 12:27:08,768 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:08" (1/1) ... [2024-11-02 12:27:09,121 INFO L138 Inliner]: procedures = 48, calls = 48, calls flagged for inlining = 25, calls inlined = 25, statements flattened = 12639 [2024-11-02 12:27:09,121 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:27:09,123 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:27:09,123 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:27:09,123 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:27:09,133 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:08" (1/1) ... [2024-11-02 12:27:09,134 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:08" (1/1) ... [2024-11-02 12:27:09,301 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:08" (1/1) ... [2024-11-02 12:27:09,302 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:08" (1/1) ... [2024-11-02 12:27:09,644 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:08" (1/1) ... [2024-11-02 12:27:09,728 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:08" (1/1) ... [2024-11-02 12:27:09,805 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:08" (1/1) ... [2024-11-02 12:27:09,847 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:08" (1/1) ... [2024-11-02 12:27:09,945 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:27:09,947 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:27:09,947 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:27:09,948 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:27:09,948 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:08" (1/1) ... [2024-11-02 12:27:09,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:27:09,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:09,990 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:27:09,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:27:10,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:27:10,029 INFO L130 BoogieDeclarations]: Found specification of procedure error [2024-11-02 12:27:10,029 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2024-11-02 12:27:10,029 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-02 12:27:10,029 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-02 12:27:10,030 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-02 12:27:10,030 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-02 12:27:10,030 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-02 12:27:10,031 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-02 12:27:10,031 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-02 12:27:10,031 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-02 12:27:10,031 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-02 12:27:10,031 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-02 12:27:10,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:27:10,032 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-02 12:27:10,032 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-02 12:27:10,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:27:10,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:27:10,187 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:27:10,190 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:27:21,045 INFO L? ?]: Removed 1699 outVars from TransFormulas that were not future-live. [2024-11-02 12:27:21,046 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:27:23,296 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:27:23,296 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-02 12:27:23,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:27:23 BoogieIcfgContainer [2024-11-02 12:27:23,300 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:27:23,302 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:27:23,303 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:27:23,306 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:27:23,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:27:04" (1/3) ... [2024-11-02 12:27:23,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514fda9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:27:23, skipping insertion in model container [2024-11-02 12:27:23,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:08" (2/3) ... [2024-11-02 12:27:23,309 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514fda9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:27:23, skipping insertion in model container [2024-11-02 12:27:23,309 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:27:23" (3/3) ... [2024-11-02 12:27:23,311 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.02.cil-2.c [2024-11-02 12:27:23,331 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:27:23,332 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-02 12:27:23,459 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:27:23,468 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;@2bd37b48, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:27:23,468 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-02 12:27:23,480 INFO L276 IsEmpty]: Start isEmpty. Operand has 1730 states, 1702 states have (on average 1.9753231492361927) internal successors, (3362), 1707 states have internal predecessors, (3362), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-02 12:27:23,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-02 12:27:23,491 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:23,492 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] [2024-11-02 12:27:23,492 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:27:23,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:23,498 INFO L85 PathProgramCache]: Analyzing trace with hash 503283323, now seen corresponding path program 1 times [2024-11-02 12:27:23,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:23,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401780775] [2024-11-02 12:27:23,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:23,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:23,900 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 12:27:23,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:23,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401780775] [2024-11-02 12:27:23,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401780775] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:27:23,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:27:23,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:27:23,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425704056] [2024-11-02 12:27:23,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:23,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:27:23,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:23,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:27:23,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:27:23,947 INFO L87 Difference]: Start difference. First operand has 1730 states, 1702 states have (on average 1.9753231492361927) internal successors, (3362), 1707 states have internal predecessors, (3362), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 12:27:24,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:24,985 INFO L93 Difference]: Finished difference Result 3523 states and 6896 transitions. [2024-11-02 12:27:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:27:24,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 38 [2024-11-02 12:27:24,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:25,017 INFO L225 Difference]: With dead ends: 3523 [2024-11-02 12:27:25,017 INFO L226 Difference]: Without dead ends: 1792 [2024-11-02 12:27:25,028 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 12:27:25,031 INFO L432 NwaCegarLoop]: 3224 mSDtfsCounter, 3463 mSDsluCounter, 3164 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3463 SdHoareTripleChecker+Valid, 6388 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:25,032 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3463 Valid, 6388 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-02 12:27:25,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2024-11-02 12:27:25,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1791. [2024-11-02 12:27:25,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1747 states have (on average 1.953062392673154) internal successors, (3412), 1751 states have internal predecessors, (3412), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2024-11-02 12:27:25,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 3470 transitions. [2024-11-02 12:27:25,194 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 3470 transitions. Word has length 38 [2024-11-02 12:27:25,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:25,195 INFO L471 AbstractCegarLoop]: Abstraction has 1791 states and 3470 transitions. [2024-11-02 12:27:25,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 12:27:25,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 3470 transitions. [2024-11-02 12:27:25,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-02 12:27:25,199 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:25,199 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-02 12:27:25,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:27:25,200 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:27:25,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:25,202 INFO L85 PathProgramCache]: Analyzing trace with hash 506007852, now seen corresponding path program 1 times [2024-11-02 12:27:25,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:25,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933497806] [2024-11-02 12:27:25,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:25,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 12:27:25,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:25,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933497806] [2024-11-02 12:27:25,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933497806] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:27:25,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354175866] [2024-11-02 12:27:25,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:25,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:25,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:25,439 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:27:25,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:27:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:25,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:27:25,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:27:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-02 12:27:25,629 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:27:25,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354175866] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:27:25,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:27:25,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-02 12:27:25,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568478058] [2024-11-02 12:27:25,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:25,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:27:25,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:25,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:27:25,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:27:25,633 INFO L87 Difference]: Start difference. First operand 1791 states and 3470 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 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 12:27:26,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:26,183 INFO L93 Difference]: Finished difference Result 2074 states and 3857 transitions. [2024-11-02 12:27:26,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:27:26,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 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 68 [2024-11-02 12:27:26,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:26,196 INFO L225 Difference]: With dead ends: 2074 [2024-11-02 12:27:26,197 INFO L226 Difference]: Without dead ends: 1929 [2024-11-02 12:27:26,198 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 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 12:27:26,200 INFO L432 NwaCegarLoop]: 3189 mSDtfsCounter, 3359 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3359 SdHoareTripleChecker+Valid, 3274 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:26,200 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3359 Valid, 3274 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-02 12:27:26,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2024-11-02 12:27:26,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1923. [2024-11-02 12:27:26,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1923 states, 1845 states have (on average 1.9192411924119241) internal successors, (3541), 1850 states have internal predecessors, (3541), 52 states have call successors, (52), 25 states have call predecessors, (52), 24 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2024-11-02 12:27:26,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 3643 transitions. [2024-11-02 12:27:26,279 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 3643 transitions. Word has length 68 [2024-11-02 12:27:26,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:26,280 INFO L471 AbstractCegarLoop]: Abstraction has 1923 states and 3643 transitions. [2024-11-02 12:27:26,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 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 12:27:26,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 3643 transitions. [2024-11-02 12:27:26,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-02 12:27:26,285 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:26,285 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-02 12:27:26,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:27:26,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9715b7d4-338b-4df0-a6dd-be9d4b716a3a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:27:26,486 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:27:26,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:26,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1109738956, now seen corresponding path program 1 times [2024-11-02 12:27:26,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:26,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748236192] [2024-11-02 12:27:26,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:26,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-02 12:27:26,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:26,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748236192] [2024-11-02 12:27:26,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748236192] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:27:26,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:27:26,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:27:26,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995282783] [2024-11-02 12:27:26,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:26,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:27:26,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:26,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:27:26,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:27:26,828 INFO L87 Difference]: Start difference. First operand 1923 states and 3643 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-02 12:27:28,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:28,328 INFO L93 Difference]: Finished difference Result 2485 states and 4385 transitions. [2024-11-02 12:27:28,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 12:27:28,329 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 68 [2024-11-02 12:27:28,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:28,343 INFO L225 Difference]: With dead ends: 2485 [2024-11-02 12:27:28,343 INFO L226 Difference]: Without dead ends: 2209 [2024-11-02 12:27:28,346 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-11-02 12:27:28,350 INFO L432 NwaCegarLoop]: 3159 mSDtfsCounter, 3513 mSDsluCounter, 9369 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3524 SdHoareTripleChecker+Valid, 12528 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:28,351 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3524 Valid, 12528 Invalid, 1111 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [78 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-02 12:27:28,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2024-11-02 12:27:28,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 2171. [2024-11-02 12:27:28,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2027 states have (on average 1.8623581647755303) internal successors, (3775), 2034 states have internal predecessors, (3775), 94 states have call successors, (94), 49 states have call predecessors, (94), 48 states have return successors, (92), 88 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-02 12:27:28,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 3961 transitions. [2024-11-02 12:27:28,487 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 3961 transitions. Word has length 68 [2024-11-02 12:27:28,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:28,489 INFO L471 AbstractCegarLoop]: Abstraction has 2171 states and 3961 transitions. [2024-11-02 12:27:28,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-02 12:27:28,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 3961 transitions. [2024-11-02 12:27:28,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-02 12:27:28,495 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:28,497 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-02 12:27:28,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:27:28,498 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:27:28,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:28,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1116956775, now seen corresponding path program 1 times [2024-11-02 12:27:28,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:28,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932959771] [2024-11-02 12:27:28,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:28,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-02 12:27:28,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:28,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932959771] [2024-11-02 12:27:28,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932959771] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:27:28,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:27:28,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:27:28,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956849306] [2024-11-02 12:27:28,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:28,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:27:28,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:28,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:27:28,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:27:28,977 INFO L87 Difference]: Start difference. First operand 2171 states and 3961 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)