./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6418d5-6f13-471b-8908-6a35add5bade/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6418d5-6f13-471b-8908-6a35add5bade/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6418d5-6f13-471b-8908-6a35add5bade/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6418d5-6f13-471b-8908-6a35add5bade/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6418d5-6f13-471b-8908-6a35add5bade/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6418d5-6f13-471b-8908-6a35add5bade/bin/utaipan-verify-nQ1chXbOIh --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 7f7f7b6ea5abe354543dc816b244a5041021350ff4076c6fd52a8208b97eac31 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:50:26,869 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:50:26,936 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6418d5-6f13-471b-8908-6a35add5bade/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 16:50:26,940 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:50:26,941 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:50:26,963 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:50:26,964 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:50:26,965 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:50:26,965 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:50:26,966 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:50:26,967 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:50:26,967 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:50:26,968 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:50:26,968 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:50:26,968 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:50:26,969 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:50:26,969 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:50:26,970 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:50:26,970 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:50:26,971 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:50:26,971 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:50:26,973 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:50:26,974 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:50:26,974 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:50:26,975 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:50:26,975 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:50:26,975 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:50:26,976 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:50:26,976 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:50:26,976 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:50:26,977 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:50:26,977 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:50:26,977 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:50:26,977 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:50:26,978 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:50:26,978 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:50:26,978 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:50:26,978 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:50:26,978 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:50:26,979 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:50:26,979 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:50:26,979 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:50:26,979 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:50:26,979 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:50:26,980 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:50:26,980 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:50:26,980 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:50:26,980 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_5d6418d5-6f13-471b-8908-6a35add5bade/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6418d5-6f13-471b-8908-6a35add5bade/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f7f7b6ea5abe354543dc816b244a5041021350ff4076c6fd52a8208b97eac31 [2023-12-02 16:50:27,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:50:27,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:50:27,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:50:27,239 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:50:27,240 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:50:27,241 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6418d5-6f13-471b-8908-6a35add5bade/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i [2023-12-02 16:50:30,092 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:50:30,315 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:50:30,316 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6418d5-6f13-471b-8908-6a35add5bade/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i [2023-12-02 16:50:30,332 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6418d5-6f13-471b-8908-6a35add5bade/bin/utaipan-verify-nQ1chXbOIh/data/5c8a07599/7515641a7c2542f1b676f817adbe74b4/FLAG5a1484a95 [2023-12-02 16:50:30,346 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6418d5-6f13-471b-8908-6a35add5bade/bin/utaipan-verify-nQ1chXbOIh/data/5c8a07599/7515641a7c2542f1b676f817adbe74b4 [2023-12-02 16:50:30,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:50:30,350 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:50:30,351 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:50:30,351 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:50:30,357 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:50:30,358 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:50:30" (1/1) ... [2023-12-02 16:50:30,359 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c6acb17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:50:30, skipping insertion in model container [2023-12-02 16:50:30,359 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:50:30" (1/1) ... [2023-12-02 16:50:30,419 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:50:30,746 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6418d5-6f13-471b-8908-6a35add5bade/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i[31306,31319] [2023-12-02 16:50:30,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:50:30,769 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:50:30,808 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6418d5-6f13-471b-8908-6a35add5bade/sv-benchmarks/c/pthread-ext/26_stack_cas_longest-2.i[31306,31319] [2023-12-02 16:50:30,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:50:30,845 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:50:30,845 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:50:30,853 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:50:30,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:50:30 WrapperNode [2023-12-02 16:50:30,854 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:50:30,855 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:50:30,855 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:50:30,856 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:50:30,863 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:50:30" (1/1) ... [2023-12-02 16:50:30,878 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:50:30" (1/1) ... [2023-12-02 16:50:30,922 INFO L138 Inliner]: procedures = 179, calls = 49, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 189 [2023-12-02 16:50:30,922 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:50:30,923 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:50:30,923 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:50:30,923 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:50:30,932 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:50:30" (1/1) ... [2023-12-02 16:50:30,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:50:30" (1/1) ... [2023-12-02 16:50:30,936 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:50:30" (1/1) ... [2023-12-02 16:50:30,936 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:50:30" (1/1) ... [2023-12-02 16:50:30,943 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:50:30" (1/1) ... [2023-12-02 16:50:30,948 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:50:30" (1/1) ... [2023-12-02 16:50:30,951 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:50:30" (1/1) ... [2023-12-02 16:50:30,953 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:50:30" (1/1) ... [2023-12-02 16:50:30,956 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:50:30,957 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:50:30,957 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:50:30,958 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:50:30,958 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:50:30" (1/1) ... [2023-12-02 16:50:30,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:50:30,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6418d5-6f13-471b-8908-6a35add5bade/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:50:30,987 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6418d5-6f13-471b-8908-6a35add5bade/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:50:30,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6418d5-6f13-471b-8908-6a35add5bade/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:50:31,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 16:50:31,020 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-12-02 16:50:31,020 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-12-02 16:50:31,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 16:50:31,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-02 16:50:31,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:50:31,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 16:50:31,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 16:50:31,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:50:31,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-02 16:50:31,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:50:31,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:50:31,023 WARN L213 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-02 16:50:31,164 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:50:31,166 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:50:31,437 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:50:31,666 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:50:31,667 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 16:50:31,667 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:50:31 BoogieIcfgContainer [2023-12-02 16:50:31,668 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:50:31,673 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:50:31,673 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:50:31,676 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:50:31,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:50:30" (1/3) ... [2023-12-02 16:50:31,678 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f3d81ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:50:31, skipping insertion in model container [2023-12-02 16:50:31,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:50:30" (2/3) ... [2023-12-02 16:50:31,680 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f3d81ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:50:31, skipping insertion in model container [2023-12-02 16:50:31,680 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:50:31" (3/3) ... [2023-12-02 16:50:31,681 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-2.i [2023-12-02 16:50:31,690 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-12-02 16:50:31,701 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:50:31,702 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:50:31,702 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-02 16:50:31,769 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 16:50:31,798 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 36 transitions, 76 flow [2023-12-02 16:50:31,824 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 126 states, 123 states have (on average 2.016260162601626) internal successors, (248), 125 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:50:31,838 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:50:31,844 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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;@1c3f3c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:50:31,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-12-02 16:50:31,847 INFO L276 IsEmpty]: Start isEmpty. Operand has 126 states, 123 states have (on average 2.016260162601626) internal successors, (248), 125 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:50:31,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 16:50:31,854 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:50:31,855 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-12-02 16:50:31,855 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:50:31,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:50:31,860 INFO L85 PathProgramCache]: Analyzing trace with hash 182114604, now seen corresponding path program 1 times [2023-12-02 16:50:31,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:50:31,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044976001] [2023-12-02 16:50:31,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:50:31,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:50:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:50:31,982 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 16:50:32,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:50:32,028 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 16:50:32,030 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 16:50:32,032 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-12-02 16:50:32,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-12-02 16:50:32,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-12-02 16:50:32,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:50:32,039 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-12-02 16:50:32,042 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 16:50:32,042 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-02 16:50:32,103 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 16:50:32,107 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 60 places, 67 transitions, 144 flow [2023-12-02 16:50:32,298 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3222 states, 3214 states have (on average 3.1742377100186685) internal successors, (10202), 3221 states have internal predecessors, (10202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:50:32,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:50:32,301 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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;@1c3f3c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:50:32,301 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-12-02 16:50:32,314 INFO L276 IsEmpty]: Start isEmpty. Operand has 3222 states, 3214 states have (on average 3.1742377100186685) internal successors, (10202), 3221 states have internal predecessors, (10202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:50:32,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 16:50:32,316 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:50:32,317 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2023-12-02 16:50:32,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-12-02 16:50:32,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:50:32,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1326593866, now seen corresponding path program 1 times [2023-12-02 16:50:32,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:50:32,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719058075] [2023-12-02 16:50:32,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:50:32,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:50:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:50:32,355 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 16:50:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:50:32,387 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 16:50:32,388 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 16:50:32,388 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-12-02 16:50:32,388 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-12-02 16:50:32,389 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-12-02 16:50:32,389 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-12-02 16:50:32,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 16:50:32,390 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-12-02 16:50:32,390 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 16:50:32,390 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-02 16:50:32,477 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 16:50:32,481 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 87 places, 98 transitions, 214 flow [2023-12-02 16:50:35,244 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 80714 states, 80695 states have (on average 4.367160294937729) internal successors, (352408), 80713 states have internal predecessors, (352408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:50:35,248 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:50:35,250 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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;@1c3f3c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:50:35,250 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-12-02 16:50:35,519 INFO L276 IsEmpty]: Start isEmpty. Operand has 80714 states, 80695 states have (on average 4.367160294937729) internal successors, (352408), 80713 states have internal predecessors, (352408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:50:35,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 16:50:35,526 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:50:35,527 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-12-02 16:50:35,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-12-02 16:50:35,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:50:35,528 INFO L85 PathProgramCache]: Analyzing trace with hash 601860523, now seen corresponding path program 1 times [2023-12-02 16:50:35,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:50:35,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361842982] [2023-12-02 16:50:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:50:35,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:50:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:50:35,603 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 16:50:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:50:35,657 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 16:50:35,657 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 16:50:35,657 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-12-02 16:50:35,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-12-02 16:50:35,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-12-02 16:50:35,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-12-02 16:50:35,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-12-02 16:50:35,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 16:50:35,659 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-12-02 16:50:35,660 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 16:50:35,660 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-12-02 16:50:35,759 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 16:50:35,766 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 114 places, 129 transitions, 286 flow [2023-12-02 16:51:41,393 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2018198 states, 2018156 states have (on average 5.566242649230287) internal successors, (11233546), 2018197 states have internal predecessors, (11233546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:51:41,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:51:41,396 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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;@1c3f3c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:51:41,396 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-12-02 16:51:50,415 INFO L276 IsEmpty]: Start isEmpty. Operand has 2018198 states, 2018156 states have (on average 5.566242649230287) internal successors, (11233546), 2018197 states have internal predecessors, (11233546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:51:50,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 16:51:50,445 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:51:50,445 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-12-02 16:51:50,445 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-02 16:51:50,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:51:50,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1400460916, now seen corresponding path program 1 times [2023-12-02 16:51:50,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:51:50,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662426348] [2023-12-02 16:51:50,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:51:50,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:51:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:51:50,499 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 16:51:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:51:50,529 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 16:51:50,530 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 16:51:50,530 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-12-02 16:51:50,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-12-02 16:51:50,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-12-02 16:51:50,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-12-02 16:51:50,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-12-02 16:51:50,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-12-02 16:51:50,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 16:51:50,533 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-12-02 16:51:50,533 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 16:51:50,533 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-12-02 16:51:50,706 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 16:51:50,712 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 141 places, 160 transitions, 360 flow