./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/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_655f59c0-8ebe-40f2-ab7a-c579eba49765/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/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_655f59c0-8ebe-40f2-ab7a-c579eba49765/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 161f5eab054e94dd2ff7a7c46df9e7154542593f1f9d4de13027218e1f7c6216 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:37:53,271 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:37:53,331 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:37:53,336 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:37:53,336 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:37:53,372 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:37:53,374 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:37:53,375 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:37:53,376 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:37:53,378 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:37:53,378 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:37:53,379 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:37:53,380 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:37:53,380 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:37:53,383 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:37:53,384 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:37:53,386 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:37:53,386 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:37:53,387 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:37:53,387 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:37:53,387 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:37:53,392 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:37:53,393 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:37:53,393 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:37:53,393 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:37:53,393 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:37:53,394 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:37:53,394 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:37:53,394 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:37:53,395 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:37:53,395 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:37:53,395 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:37:53,395 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:37:53,398 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:37:53,398 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:37:53,399 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:37:53,399 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:37:53,400 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:37:53,400 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:37:53,400 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:37:53,400 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:37:53,405 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:37:53,405 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:37:53,405 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:37:53,406 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:37:53,406 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:37:53,406 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:37:53,406 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_655f59c0-8ebe-40f2-ab7a-c579eba49765/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 161f5eab054e94dd2ff7a7c46df9e7154542593f1f9d4de13027218e1f7c6216 [2024-11-02 12:37:53,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:37:53,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:37:53,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:37:53,782 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:37:53,783 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:37:53,785 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c Unable to find full path for "g++" [2024-11-02 12:37:55,903 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:37:56,685 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:37:56,687 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c [2024-11-02 12:37:56,766 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/bin/utaipan-verify-DbMuA5NWw2/data/ca4e5e7ea/553882e4032a44ba892f4e0e585dfd46/FLAG7a4b20a66 [2024-11-02 12:37:56,788 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/bin/utaipan-verify-DbMuA5NWw2/data/ca4e5e7ea/553882e4032a44ba892f4e0e585dfd46 [2024-11-02 12:37:56,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:37:56,793 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:37:56,796 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:37:56,798 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:37:56,804 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:37:56,805 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:37:56" (1/1) ... [2024-11-02 12:37:56,806 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a52e4ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:37:56, skipping insertion in model container [2024-11-02 12:37:56,808 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:37:56" (1/1) ... [2024-11-02 12:37:57,153 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:37:59,640 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_655f59c0-8ebe-40f2-ab7a-c579eba49765/sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c[381679,381692] [2024-11-02 12:37:59,669 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_655f59c0-8ebe-40f2-ab7a-c579eba49765/sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c[383339,383352] [2024-11-02 12:37:59,867 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:37:59,880 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:38:01,102 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_655f59c0-8ebe-40f2-ab7a-c579eba49765/sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c[381679,381692] [2024-11-02 12:38:01,107 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_655f59c0-8ebe-40f2-ab7a-c579eba49765/sv-benchmarks/c/combinations/Problem05_label43+token_ring.03.cil-2.c[383339,383352] [2024-11-02 12:38:01,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:38:01,217 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:38:01,218 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:01 WrapperNode [2024-11-02 12:38:01,218 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:38:01,220 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:38:01,220 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:38:01,221 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:38:01,229 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:01" (1/1) ... [2024-11-02 12:38:01,379 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:01" (1/1) ... [2024-11-02 12:38:01,985 INFO L138 Inliner]: procedures = 50, calls = 50, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 12693 [2024-11-02 12:38:01,986 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:38:01,990 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:38:01,990 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:38:01,990 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:38:02,014 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:01" (1/1) ... [2024-11-02 12:38:02,015 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:01" (1/1) ... [2024-11-02 12:38:02,144 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:01" (1/1) ... [2024-11-02 12:38:02,145 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:01" (1/1) ... [2024-11-02 12:38:02,565 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:01" (1/1) ... [2024-11-02 12:38:02,664 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:01" (1/1) ... [2024-11-02 12:38:02,699 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:01" (1/1) ... [2024-11-02 12:38:02,730 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:01" (1/1) ... [2024-11-02 12:38:02,829 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:38:02,831 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:38:02,831 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:38:02,833 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:38:02,834 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:01" (1/1) ... [2024-11-02 12:38:02,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:38:02,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:38:02,867 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:38:02,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:38:02,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:38:02,907 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-02 12:38:02,907 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-02 12:38:02,907 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-02 12:38:02,907 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-02 12:38:02,908 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-02 12:38:02,908 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-02 12:38:02,908 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-02 12:38:02,908 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-02 12:38:02,909 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-02 12:38:02,909 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-02 12:38:02,909 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-02 12:38:02,909 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-02 12:38:02,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:38:02,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:38:02,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:38:03,055 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:38:03,058 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:38:13,481 INFO L? ?]: Removed 1701 outVars from TransFormulas that were not future-live. [2024-11-02 12:38:13,481 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:38:16,326 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:38:16,327 INFO L316 CfgBuilder]: Removed 7 assume(true) statements. [2024-11-02 12:38:16,327 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:38:16 BoogieIcfgContainer [2024-11-02 12:38:16,327 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:38:16,330 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:38:16,330 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:38:16,333 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:38:16,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:37:56" (1/3) ... [2024-11-02 12:38:16,335 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e81a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:38:16, skipping insertion in model container [2024-11-02 12:38:16,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:38:01" (2/3) ... [2024-11-02 12:38:16,335 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e81a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:38:16, skipping insertion in model container [2024-11-02 12:38:16,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:38:16" (3/3) ... [2024-11-02 12:38:16,337 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.03.cil-2.c [2024-11-02 12:38:16,356 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:38:16,357 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-02 12:38:16,471 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:38:16,478 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;@36f12bc6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:38:16,478 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-02 12:38:16,491 INFO L276 IsEmpty]: Start isEmpty. Operand has 1736 states, 1710 states have (on average 1.972514619883041) internal successors, (3373), 1713 states have internal predecessors, (3373), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-02 12:38:16,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-02 12:38:16,500 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:16,501 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] [2024-11-02 12:38:16,501 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:16,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:16,507 INFO L85 PathProgramCache]: Analyzing trace with hash 557315859, now seen corresponding path program 1 times [2024-11-02 12:38:16,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:16,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402498685] [2024-11-02 12:38:16,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:16,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:17,013 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 12:38:17,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:17,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402498685] [2024-11-02 12:38:17,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402498685] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:38:17,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:38:17,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:38:17,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447169902] [2024-11-02 12:38:17,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:38:17,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:38:17,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:38:17,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:38:17,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:38:17,066 INFO L87 Difference]: Start difference. First operand has 1736 states, 1710 states have (on average 1.972514619883041) internal successors, (3373), 1713 states have internal predecessors, (3373), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 12:38:18,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:38:18,122 INFO L93 Difference]: Finished difference Result 3548 states and 6935 transitions. [2024-11-02 12:38:18,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:38:18,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2024-11-02 12:38:18,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:38:18,157 INFO L225 Difference]: With dead ends: 3548 [2024-11-02 12:38:18,158 INFO L226 Difference]: Without dead ends: 1811 [2024-11-02 12:38:18,170 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 12:38:18,174 INFO L432 NwaCegarLoop]: 3249 mSDtfsCounter, 3490 mSDsluCounter, 3187 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3490 SdHoareTripleChecker+Valid, 6436 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-02 12:38:18,175 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3490 Valid, 6436 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-02 12:38:18,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2024-11-02 12:38:18,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1810. [2024-11-02 12:38:18,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1766 states have (on average 1.9479048697621744) internal successors, (3440), 1769 states have internal predecessors, (3440), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-02 12:38:18,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 3500 transitions. [2024-11-02 12:38:18,348 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 3500 transitions. Word has length 40 [2024-11-02 12:38:18,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:38:18,349 INFO L471 AbstractCegarLoop]: Abstraction has 1810 states and 3500 transitions. [2024-11-02 12:38:18,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-02 12:38:18,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 3500 transitions. [2024-11-02 12:38:18,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-02 12:38:18,358 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:18,358 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, 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 12:38:18,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:38:18,359 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:18,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:18,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1850144082, now seen corresponding path program 1 times [2024-11-02 12:38:18,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:18,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124538920] [2024-11-02 12:38:18,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:18,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 12:38:18,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:18,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124538920] [2024-11-02 12:38:18,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124538920] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:38:18,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679913224] [2024-11-02 12:38:18,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:18,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:38:18,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:38:18,625 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:38:18,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:38:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:18,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:38:18,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:38:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-02 12:38:18,926 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:38:18,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679913224] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:38:18,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:38:18,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-02 12:38:18,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925149402] [2024-11-02 12:38:18,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:38:18,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:38:18,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:38:18,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:38:18,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:38:18,931 INFO L87 Difference]: Start difference. First operand 1810 states and 3500 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 12:38:19,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:38:19,488 INFO L93 Difference]: Finished difference Result 2131 states and 3949 transitions. [2024-11-02 12:38:19,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:38:19,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2024-11-02 12:38:19,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:38:19,502 INFO L225 Difference]: With dead ends: 2131 [2024-11-02 12:38:19,503 INFO L226 Difference]: Without dead ends: 1967 [2024-11-02 12:38:19,505 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 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 12:38:19,507 INFO L432 NwaCegarLoop]: 3193 mSDtfsCounter, 3367 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3367 SdHoareTripleChecker+Valid, 3287 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-02 12:38:19,507 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3367 Valid, 3287 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-02 12:38:19,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2024-11-02 12:38:19,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1963. [2024-11-02 12:38:19,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1883 states have (on average 1.910249601699416) internal successors, (3597), 1887 states have internal predecessors, (3597), 54 states have call successors, (54), 24 states have call predecessors, (54), 24 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2024-11-02 12:38:19,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 3705 transitions. [2024-11-02 12:38:19,580 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 3705 transitions. Word has length 74 [2024-11-02 12:38:19,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:38:19,581 INFO L471 AbstractCegarLoop]: Abstraction has 1963 states and 3705 transitions. [2024-11-02 12:38:19,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 12:38:19,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 3705 transitions. [2024-11-02 12:38:19,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-02 12:38:19,584 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:19,585 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, 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 12:38:19,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 12:38:19,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-02 12:38:19,785 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:19,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:19,786 INFO L85 PathProgramCache]: Analyzing trace with hash 957229484, now seen corresponding path program 1 times [2024-11-02 12:38:19,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:19,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257173837] [2024-11-02 12:38:19,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:19,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 12:38:19,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:19,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257173837] [2024-11-02 12:38:19,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257173837] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:38:19,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819197393] [2024-11-02 12:38:19,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:19,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:38:19,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:38:19,996 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:38:19,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:38:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:20,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:38:20,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:38:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 12:38:20,194 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:38:20,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819197393] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:38:20,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:38:20,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-02 12:38:20,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278044581] [2024-11-02 12:38:20,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:38:20,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:38:20,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:38:20,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:38:20,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:38:20,198 INFO L87 Difference]: Start difference. First operand 1963 states and 3705 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 12:38:20,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:38:20,742 INFO L93 Difference]: Finished difference Result 2584 states and 4564 transitions. [2024-11-02 12:38:20,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:38:20,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2024-11-02 12:38:20,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:38:20,754 INFO L225 Difference]: With dead ends: 2584 [2024-11-02 12:38:20,754 INFO L226 Difference]: Without dead ends: 2267 [2024-11-02 12:38:20,756 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 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 12:38:20,758 INFO L432 NwaCegarLoop]: 3158 mSDtfsCounter, 3370 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3370 SdHoareTripleChecker+Valid, 3252 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 12:38:20,758 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3370 Valid, 3252 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-02 12:38:20,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2024-11-02 12:38:20,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2261. [2024-11-02 12:38:20,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2261 states, 2111 states have (on average 1.8469919469445761) internal successors, (3899), 2117 states have internal predecessors, (3899), 100 states have call successors, (100), 48 states have call predecessors, (100), 48 states have return successors, (100), 96 states have call predecessors, (100), 100 states have call successors, (100) [2024-11-02 12:38:20,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 4099 transitions. [2024-11-02 12:38:20,840 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 4099 transitions. Word has length 74 [2024-11-02 12:38:20,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:38:20,841 INFO L471 AbstractCegarLoop]: Abstraction has 2261 states and 4099 transitions. [2024-11-02 12:38:20,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 12:38:20,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 4099 transitions. [2024-11-02 12:38:20,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-02 12:38:20,845 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:38:20,845 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, 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 12:38:20,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:38:21,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_655f59c0-8ebe-40f2-ab7a-c579eba49765/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:38:21,046 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:38:21,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:38:21,047 INFO L85 PathProgramCache]: Analyzing trace with hash -475020818, now seen corresponding path program 1 times [2024-11-02 12:38:21,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:38:21,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334407027] [2024-11-02 12:38:21,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:38:21,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:38:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:38:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-02 12:38:21,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:38:21,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334407027] [2024-11-02 12:38:21,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334407027] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:38:21,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:38:21,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:38:21,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696643430] [2024-11-02 12:38:21,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:38:21,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:38:21,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:38:21,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:38:21,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:38:21,470 INFO L87 Difference]: Start difference. First operand 2261 states and 4099 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-02 12:38:22,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:38:22,834 INFO L93 Difference]: Finished difference Result 3537 states and 5805 transitions. [2024-11-02 12:38:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 12:38:22,835 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 74 [2024-11-02 12:38:22,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:38:22,856 INFO L225 Difference]: With dead ends: 3537 [2024-11-02 12:38:22,856 INFO L226 Difference]: Without dead ends: 2923 [2024-11-02 12:38:22,860 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 12:38:22,863 INFO L432 NwaCegarLoop]: 3176 mSDtfsCounter, 3555 mSDsluCounter, 9398 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3567 SdHoareTripleChecker+Valid, 12574 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:38:22,865 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3567 Valid, 12574 Invalid, 1126 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [65 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-02 12:38:22,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states.