./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_66afbbba-5839-4f6c-bd8e-9eb8a8b22dbd/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66afbbba-5839-4f6c-bd8e-9eb8a8b22dbd/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66afbbba-5839-4f6c-bd8e-9eb8a8b22dbd/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66afbbba-5839-4f6c-bd8e-9eb8a8b22dbd/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66afbbba-5839-4f6c-bd8e-9eb8a8b22dbd/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66afbbba-5839-4f6c-bd8e-9eb8a8b22dbd/bin/utaipan-verify-NcY6lQBIFX --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 e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:46:37,299 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:46:37,430 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66afbbba-5839-4f6c-bd8e-9eb8a8b22dbd/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:46:37,439 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:46:37,440 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:46:37,482 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:46:37,482 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:46:37,483 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:46:37,484 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:46:37,490 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:46:37,490 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:46:37,491 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:46:37,492 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:46:37,494 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:46:37,494 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:46:37,495 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:46:37,495 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:46:37,496 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:46:37,496 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:46:37,497 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:46:37,499 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:46:37,499 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:46:37,501 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:46:37,501 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:46:37,502 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:46:37,502 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:46:37,503 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:46:37,503 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:46:37,504 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:46:37,504 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:46:37,505 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:46:37,506 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:46:37,506 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:46:37,506 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:46:37,507 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:46:37,507 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:46:37,507 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:46:37,508 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:46:37,508 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:46:37,508 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:46:37,509 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:46:37,509 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:46:37,509 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:46:37,510 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:46:37,510 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:46:37,511 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_66afbbba-5839-4f6c-bd8e-9eb8a8b22dbd/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66afbbba-5839-4f6c-bd8e-9eb8a8b22dbd/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b [2023-11-12 00:46:37,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:46:37,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:46:37,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:46:37,864 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:46:37,866 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:46:37,869 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66afbbba-5839-4f6c-bd8e-9eb8a8b22dbd/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2023-11-12 00:46:41,044 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:46:41,314 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:46:41,315 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66afbbba-5839-4f6c-bd8e-9eb8a8b22dbd/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2023-11-12 00:46:41,333 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66afbbba-5839-4f6c-bd8e-9eb8a8b22dbd/bin/utaipan-verify-NcY6lQBIFX/data/5910752a8/3624d6d4a5804517acbd9d03fd3dc853/FLAGbba1eb1aa [2023-11-12 00:46:41,358 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66afbbba-5839-4f6c-bd8e-9eb8a8b22dbd/bin/utaipan-verify-NcY6lQBIFX/data/5910752a8/3624d6d4a5804517acbd9d03fd3dc853 [2023-11-12 00:46:41,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:46:41,362 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:46:41,363 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:46:41,364 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:46:41,369 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:46:41,370 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:46:41" (1/1) ... [2023-11-12 00:46:41,372 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ce77e84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:41, skipping insertion in model container [2023-11-12 00:46:41,372 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:46:41" (1/1) ... [2023-11-12 00:46:41,430 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:46:41,894 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_66afbbba-5839-4f6c-bd8e-9eb8a8b22dbd/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i[30687,30700] [2023-11-12 00:46:41,905 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:46:41,919 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:46:41,981 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_66afbbba-5839-4f6c-bd8e-9eb8a8b22dbd/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i[30687,30700] [2023-11-12 00:46:41,990 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:46:42,042 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:46:42,043 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:42 WrapperNode [2023-11-12 00:46:42,043 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:46:42,045 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:46:42,045 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:46:42,045 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:46:42,053 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:42" (1/1) ... [2023-11-12 00:46:42,076 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:42" (1/1) ... [2023-11-12 00:46:42,097 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 101 [2023-11-12 00:46:42,097 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:46:42,098 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:46:42,098 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:46:42,098 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:46:42,107 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:42" (1/1) ... [2023-11-12 00:46:42,107 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:42" (1/1) ... [2023-11-12 00:46:42,111 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:42" (1/1) ... [2023-11-12 00:46:42,111 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:42" (1/1) ... [2023-11-12 00:46:42,118 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:42" (1/1) ... [2023-11-12 00:46:42,122 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:42" (1/1) ... [2023-11-12 00:46:42,124 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:42" (1/1) ... [2023-11-12 00:46:42,125 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:42" (1/1) ... [2023-11-12 00:46:42,128 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:46:42,129 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:46:42,129 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:46:42,130 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:46:42,130 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:42" (1/1) ... [2023-11-12 00:46:42,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:46:42,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66afbbba-5839-4f6c-bd8e-9eb8a8b22dbd/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:42,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66afbbba-5839-4f6c-bd8e-9eb8a8b22dbd/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:46:42,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66afbbba-5839-4f6c-bd8e-9eb8a8b22dbd/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:46:42,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:46:42,201 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-12 00:46:42,201 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-12 00:46:42,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:46:42,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:46:42,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:46:42,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:46:42,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:46:42,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:46:42,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:46:42,204 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 00:46:42,352 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:46:42,354 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:46:42,583 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:46:42,688 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:46:42,688 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 00:46:42,691 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:46:42 BoogieIcfgContainer [2023-11-12 00:46:42,691 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:46:42,694 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:46:42,694 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:46:42,699 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:46:42,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:46:41" (1/3) ... [2023-11-12 00:46:42,700 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d794d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:46:42, skipping insertion in model container [2023-11-12 00:46:42,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:42" (2/3) ... [2023-11-12 00:46:42,700 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d794d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:46:42, skipping insertion in model container [2023-11-12 00:46:42,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:46:42" (3/3) ... [2023-11-12 00:46:42,702 INFO L112 eAbstractionObserver]: Analyzing ICFG 36_stack_cas_p0_vs_concur.i [2023-11-12 00:46:42,713 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 00:46:42,727 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:46:42,727 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:46:42,728 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 00:46:42,820 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:46:42,904 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:46:42,960 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 93 transitions, 190 flow [2023-11-12 00:46:42,965 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 93 transitions, 190 flow [2023-11-12 00:46:42,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 93 transitions, 190 flow [2023-11-12 00:46:43,067 INFO L124 PetriNetUnfolderBase]: 10/104 cut-off events. [2023-11-12 00:46:43,070 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 00:46:43,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 104 events. 10/104 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 136 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2023-11-12 00:46:43,083 INFO L119 LiptonReduction]: Number of co-enabled transitions 1792 [2023-11-12 00:46:46,136 INFO L134 LiptonReduction]: Checked pairs total: 1976 [2023-11-12 00:46:46,137 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-11-12 00:46:46,149 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 22 places, 23 transitions, 50 flow [2023-11-12 00:46:46,173 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 72 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:46,196 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:46:46,206 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;@c54557d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:46:46,206 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 00:46:46,210 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:46,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:46:46,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:46,220 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-12 00:46:46,220 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:46,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:46,230 INFO L85 PathProgramCache]: Analyzing trace with hash 792190148, now seen corresponding path program 1 times [2023-11-12 00:46:46,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:46,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764862954] [2023-11-12 00:46:46,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:46,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:46:46,361 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 00:46:46,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:46:46,431 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-12 00:46:46,433 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 00:46:46,434 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-12 00:46:46,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-12 00:46:46,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-12 00:46:46,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:46:46,442 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-12 00:46:46,446 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 00:46:46,447 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 00:46:46,499 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:46:46,503 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:46:46,503 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 158 transitions, 326 flow [2023-11-12 00:46:46,504 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 158 transitions, 326 flow [2023-11-12 00:46:46,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 158 transitions, 326 flow [2023-11-12 00:46:46,550 INFO L124 PetriNetUnfolderBase]: 19/182 cut-off events. [2023-11-12 00:46:46,550 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 00:46:46,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 182 events. 19/182 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 441 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 141. Up to 6 conditions per place. [2023-11-12 00:46:46,563 INFO L119 LiptonReduction]: Number of co-enabled transitions 11904 [2023-11-12 00:46:56,170 INFO L134 LiptonReduction]: Checked pairs total: 20452 [2023-11-12 00:46:56,170 INFO L136 LiptonReduction]: Total number of compositions: 126 [2023-11-12 00:46:56,172 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 54 transitions, 118 flow [2023-11-12 00:46:56,350 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2501 states, 2493 states have (on average 3.1018852787805855) internal successors, (7733), 2500 states have internal predecessors, (7733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:56,351 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:46:56,353 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;@c54557d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:46:56,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 00:46:56,362 INFO L276 IsEmpty]: Start isEmpty. Operand has 2501 states, 2493 states have (on average 3.1018852787805855) internal successors, (7733), 2500 states have internal predecessors, (7733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:56,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 00:46:56,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:56,366 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-12 00:46:56,366 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)] === [2023-11-12 00:46:56,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:56,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1552615279, now seen corresponding path program 1 times [2023-11-12 00:46:56,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:56,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648891856] [2023-11-12 00:46:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:56,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:46:56,395 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 00:46:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:46:56,422 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-12 00:46:56,422 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 00:46:56,423 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-12 00:46:56,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-12 00:46:56,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-12 00:46:56,423 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-12 00:46:56,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:46:56,424 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-12 00:46:56,425 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 00:46:56,425 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-12 00:46:56,468 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:46:56,471 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:46:56,472 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 205 places, 223 transitions, 464 flow [2023-11-12 00:46:56,472 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 205 places, 223 transitions, 464 flow [2023-11-12 00:46:56,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 223 transitions, 464 flow [2023-11-12 00:46:56,536 INFO L124 PetriNetUnfolderBase]: 28/260 cut-off events. [2023-11-12 00:46:56,536 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 00:46:56,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 260 events. 28/260 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 828 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 205. Up to 8 conditions per place. [2023-11-12 00:46:56,566 INFO L119 LiptonReduction]: Number of co-enabled transitions 30336 [2023-11-12 00:47:01,151 INFO L134 LiptonReduction]: Checked pairs total: 79372 [2023-11-12 00:47:01,151 INFO L136 LiptonReduction]: Total number of compositions: 193 [2023-11-12 00:47:01,153 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 71 places, 78 transitions, 174 flow [2023-11-12 00:47:04,264 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 45315 states, 45296 states have (on average 4.357713705404451) internal successors, (197387), 45314 states have internal predecessors, (197387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:47:04,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:47:04,278 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;@c54557d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:47:04,278 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-12 00:47:04,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 45315 states, 45296 states have (on average 4.357713705404451) internal successors, (197387), 45314 states have internal predecessors, (197387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:47:04,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:47:04,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:04,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:04,653 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-12 00:47:04,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:04,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1196162520, now seen corresponding path program 1 times [2023-11-12 00:47:04,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:04,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554878249] [2023-11-12 00:47:04,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:04,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:47:04,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:04,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554878249] [2023-11-12 00:47:04,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554878249] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:04,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:47:04,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:47:04,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120682089] [2023-11-12 00:47:04,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:04,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:47:04,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:04,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:47:04,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:47:04,974 INFO L87 Difference]: Start difference. First operand has 45315 states, 45296 states have (on average 4.357713705404451) internal successors, (197387), 45314 states have internal predecessors, (197387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:47:06,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:06,450 INFO L93 Difference]: Finished difference Result 32223 states and 131599 transitions. [2023-11-12 00:47:06,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:47:06,466 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 00:47:06,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:07,415 INFO L225 Difference]: With dead ends: 32223 [2023-11-12 00:47:07,429 INFO L226 Difference]: Without dead ends: 32223 [2023-11-12 00:47:07,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:47:07,459 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:07,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:47:07,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32223 states. [2023-11-12 00:47:09,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32223 to 32223. [2023-11-12 00:47:09,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32223 states, 32222 states have (on average 4.084135063000434) internal successors, (131599), 32222 states have internal predecessors, (131599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:47:10,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32223 states to 32223 states and 131599 transitions. [2023-11-12 00:47:10,252 INFO L78 Accepts]: Start accepts. Automaton has 32223 states and 131599 transitions. Word has length 7 [2023-11-12 00:47:10,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:10,253 INFO L495 AbstractCegarLoop]: Abstraction has 32223 states and 131599 transitions. [2023-11-12 00:47:10,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:47:10,254 INFO L276 IsEmpty]: Start isEmpty. Operand 32223 states and 131599 transitions. [2023-11-12 00:47:10,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 00:47:10,260 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:10,260 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-12 00:47:10,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:47:10,260 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-12 00:47:10,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:10,261 INFO L85 PathProgramCache]: Analyzing trace with hash 22560941, now seen corresponding path program 1 times [2023-11-12 00:47:10,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:10,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528116492] [2023-11-12 00:47:10,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:10,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:10,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:47:10,290 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 00:47:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:47:10,338 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-12 00:47:10,344 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 00:47:10,344 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-12 00:47:10,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-12 00:47:10,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-12 00:47:10,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-12 00:47:10,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-12 00:47:10,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:47:10,346 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-12 00:47:10,347 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 00:47:10,348 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-12 00:47:10,410 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:47:10,414 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:47:10,414 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 264 places, 288 transitions, 604 flow [2023-11-12 00:47:10,415 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 264 places, 288 transitions, 604 flow [2023-11-12 00:47:10,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 264 places, 288 transitions, 604 flow [2023-11-12 00:47:10,494 INFO L124 PetriNetUnfolderBase]: 37/338 cut-off events. [2023-11-12 00:47:10,495 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 00:47:10,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 338 events. 37/338 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1225 event pairs, 0 based on Foata normal form. 0/292 useless extension candidates. Maximal degree in co-relation 269. Up to 10 conditions per place. [2023-11-12 00:47:10,525 INFO L119 LiptonReduction]: Number of co-enabled transitions 57088 [2023-11-12 00:47:29,499 INFO L134 LiptonReduction]: Checked pairs total: 146835 [2023-11-12 00:47:29,499 INFO L136 LiptonReduction]: Total number of compositions: 273 [2023-11-12 00:47:29,501 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 89 places, 96 transitions, 220 flow