./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/25_stack_longest-2.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_55c9f978-a820-4738-823b-873b159f32d2/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c9f978-a820-4738-823b-873b159f32d2/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_55c9f978-a820-4738-823b-873b159f32d2/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c9f978-a820-4738-823b-873b159f32d2/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/25_stack_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c9f978-a820-4738-823b-873b159f32d2/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_55c9f978-a820-4738-823b-873b159f32d2/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 cabdc6d1ed2adbc421c41fcb971b1cf28c20678c065a4de58d9cc1e3842298d4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:45:22,427 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:45:22,551 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c9f978-a820-4738-823b-873b159f32d2/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:45:22,559 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:45:22,560 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:45:22,618 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:45:22,619 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:45:22,620 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:45:22,621 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:45:22,626 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:45:22,627 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:45:22,628 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:45:22,629 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:45:22,631 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:45:22,631 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:45:22,631 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:45:22,632 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:45:22,632 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:45:22,633 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:45:22,633 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:45:22,634 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:45:22,635 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:45:22,636 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:45:22,636 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:45:22,637 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:45:22,651 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:45:22,651 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:45:22,652 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:45:22,652 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:45:22,653 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:45:22,654 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:45:22,654 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:45:22,655 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:45:22,655 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:45:22,655 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:45:22,655 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:45:22,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:45:22,656 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:45:22,656 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:45:22,656 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:45:22,657 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:45:22,657 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:45:22,657 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:45:22,657 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:45:22,658 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:45:22,658 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_55c9f978-a820-4738-823b-873b159f32d2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c9f978-a820-4738-823b-873b159f32d2/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cabdc6d1ed2adbc421c41fcb971b1cf28c20678c065a4de58d9cc1e3842298d4 [2023-11-12 00:45:23,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:45:23,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:45:23,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:45:23,057 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:45:23,058 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:45:23,061 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c9f978-a820-4738-823b-873b159f32d2/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/pthread-ext/25_stack_longest-2.i [2023-11-12 00:45:26,204 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:45:26,642 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:45:26,643 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c9f978-a820-4738-823b-873b159f32d2/sv-benchmarks/c/pthread-ext/25_stack_longest-2.i [2023-11-12 00:45:26,660 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c9f978-a820-4738-823b-873b159f32d2/bin/utaipan-verify-NcY6lQBIFX/data/bb45281db/718b5148352748a8a773254df79999ff/FLAG74b48dab9 [2023-11-12 00:45:26,678 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c9f978-a820-4738-823b-873b159f32d2/bin/utaipan-verify-NcY6lQBIFX/data/bb45281db/718b5148352748a8a773254df79999ff [2023-11-12 00:45:26,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:45:26,683 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:45:26,685 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:45:26,685 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:45:26,691 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:45:26,692 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:45:26" (1/1) ... [2023-11-12 00:45:26,694 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@613cbbb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:26, skipping insertion in model container [2023-11-12 00:45:26,694 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:45:26" (1/1) ... [2023-11-12 00:45:26,763 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:45:27,210 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_55c9f978-a820-4738-823b-873b159f32d2/sv-benchmarks/c/pthread-ext/25_stack_longest-2.i[31183,31196] [2023-11-12 00:45:27,226 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:45:27,239 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:45:27,302 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_55c9f978-a820-4738-823b-873b159f32d2/sv-benchmarks/c/pthread-ext/25_stack_longest-2.i[31183,31196] [2023-11-12 00:45:27,312 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:45:27,362 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:45:27,363 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:45:27,371 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:45:27,371 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:27 WrapperNode [2023-11-12 00:45:27,372 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:45:27,373 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:45:27,373 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:45:27,373 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:45:27,383 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:27" (1/1) ... [2023-11-12 00:45:27,407 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:27" (1/1) ... [2023-11-12 00:45:27,436 INFO L138 Inliner]: procedures = 179, calls = 36, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 174 [2023-11-12 00:45:27,437 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:45:27,437 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:45:27,438 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:45:27,438 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:45:27,447 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:27" (1/1) ... [2023-11-12 00:45:27,447 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:27" (1/1) ... [2023-11-12 00:45:27,451 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:27" (1/1) ... [2023-11-12 00:45:27,451 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:27" (1/1) ... [2023-11-12 00:45:27,460 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:27" (1/1) ... [2023-11-12 00:45:27,464 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:27" (1/1) ... [2023-11-12 00:45:27,467 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:27" (1/1) ... [2023-11-12 00:45:27,469 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:27" (1/1) ... [2023-11-12 00:45:27,474 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:45:27,475 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:45:27,475 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:45:27,475 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:45:27,476 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:27" (1/1) ... [2023-11-12 00:45:27,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:45:27,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c9f978-a820-4738-823b-873b159f32d2/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:45:27,512 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c9f978-a820-4738-823b-873b159f32d2/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:45:27,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55c9f978-a820-4738-823b-873b159f32d2/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:45:27,567 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:45:27,568 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-12 00:45:27,568 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-12 00:45:27,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:45:27,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 00:45:27,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:45:27,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:45:27,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:45:27,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:45:27,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 00:45:27,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:45:27,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:45:27,575 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 00:45:27,783 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:45:27,785 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:45:28,183 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:45:28,517 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:45:28,517 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:45:28,520 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:45:28 BoogieIcfgContainer [2023-11-12 00:45:28,520 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:45:28,523 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:45:28,523 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:45:28,527 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:45:28,528 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:45:26" (1/3) ... [2023-11-12 00:45:28,529 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57cd9a1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:45:28, skipping insertion in model container [2023-11-12 00:45:28,529 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:45:27" (2/3) ... [2023-11-12 00:45:28,529 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57cd9a1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:45:28, skipping insertion in model container [2023-11-12 00:45:28,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:45:28" (3/3) ... [2023-11-12 00:45:28,531 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longest-2.i [2023-11-12 00:45:28,542 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 00:45:28,556 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:45:28,556 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:45:28,557 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 00:45:28,656 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:45:28,698 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:45:28,717 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 99 transitions, 202 flow [2023-11-12 00:45:28,720 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 99 transitions, 202 flow [2023-11-12 00:45:28,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 99 transitions, 202 flow [2023-11-12 00:45:28,785 INFO L124 PetriNetUnfolderBase]: 8/110 cut-off events. [2023-11-12 00:45:28,785 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 00:45:28,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 110 events. 8/110 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 111 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-11-12 00:45:28,796 INFO L119 LiptonReduction]: Number of co-enabled transitions 1820 [2023-11-12 00:45:33,282 INFO L134 LiptonReduction]: Checked pairs total: 1942 [2023-11-12 00:45:33,282 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-11-12 00:45:33,294 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 19 transitions, 42 flow [2023-11-12 00:45:33,320 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 52 states, 49 states have (on average 2.142857142857143) internal successors, (105), 51 states have internal predecessors, (105), 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 00:45:33,348 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:45:33,358 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;@1325dfee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:45:33,358 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 00:45:33,361 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 49 states have (on average 2.142857142857143) internal successors, (105), 51 states have internal predecessors, (105), 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 00:45:33,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:45:33,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:33,370 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-12 00:45:33,371 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 00:45:33,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:33,380 INFO L85 PathProgramCache]: Analyzing trace with hash 137633456, now seen corresponding path program 1 times [2023-11-12 00:45:33,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:33,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204691633] [2023-11-12 00:45:33,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:33,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:45:33,571 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 00:45:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:45:33,638 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-12 00:45:33,640 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 00:45:33,642 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-12 00:45:33,644 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-12 00:45:33,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-12 00:45:33,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:45:33,649 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-12 00:45:33,652 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 00:45:33,653 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 00:45:33,711 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:45:33,716 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:45:33,717 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 165 transitions, 340 flow [2023-11-12 00:45:33,717 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 165 transitions, 340 flow [2023-11-12 00:45:33,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 165 transitions, 340 flow [2023-11-12 00:45:33,778 INFO L124 PetriNetUnfolderBase]: 15/189 cut-off events. [2023-11-12 00:45:33,778 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 00:45:33,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 189 events. 15/189 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 353 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 143. Up to 6 conditions per place. [2023-11-12 00:45:33,793 INFO L119 LiptonReduction]: Number of co-enabled transitions 12220 [2023-11-12 00:45:39,656 INFO L134 LiptonReduction]: Checked pairs total: 23516 [2023-11-12 00:45:39,656 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-11-12 00:45:39,660 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 56 transitions, 122 flow [2023-11-12 00:45:39,807 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2501 states, 2493 states have (on average 3.1989570798235056) internal successors, (7975), 2500 states have internal predecessors, (7975), 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 00:45:39,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:45:39,812 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;@1325dfee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:45:39,812 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 00:45:39,822 INFO L276 IsEmpty]: Start isEmpty. Operand has 2501 states, 2493 states have (on average 3.1989570798235056) internal successors, (7975), 2500 states have internal predecessors, (7975), 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 00:45:39,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 00:45:39,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:39,827 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-12 00:45:39,828 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 00:45:39,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:39,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2092540793, now seen corresponding path program 1 times [2023-11-12 00:45:39,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:39,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534159642] [2023-11-12 00:45:39,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:39,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:45:39,856 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 00:45:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:45:39,901 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-12 00:45:39,901 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 00:45:39,902 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-12 00:45:39,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-12 00:45:39,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-12 00:45:39,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-12 00:45:39,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:45:39,911 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-12 00:45:39,911 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 00:45:39,911 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-12 00:45:40,009 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:45:40,013 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:45:40,014 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 219 places, 231 transitions, 480 flow [2023-11-12 00:45:40,014 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 219 places, 231 transitions, 480 flow [2023-11-12 00:45:40,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 231 transitions, 480 flow [2023-11-12 00:45:40,077 INFO L124 PetriNetUnfolderBase]: 22/268 cut-off events. [2023-11-12 00:45:40,077 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 00:45:40,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 268 events. 22/268 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 703 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 208. Up to 8 conditions per place. [2023-11-12 00:45:40,106 INFO L119 LiptonReduction]: Number of co-enabled transitions 31200 [2023-11-12 00:45:47,950 INFO L134 LiptonReduction]: Checked pairs total: 58021 [2023-11-12 00:45:47,950 INFO L136 LiptonReduction]: Total number of compositions: 195 [2023-11-12 00:45:47,952 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 73 places, 81 transitions, 180 flow [2023-11-12 00:45:50,308 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 50100 states, 50081 states have (on average 4.389049739422136) internal successors, (219808), 50099 states have internal predecessors, (219808), 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 00:45:50,325 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:45:50,328 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;@1325dfee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:45:50,332 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-12 00:45:50,398 INFO L276 IsEmpty]: Start isEmpty. Operand has 50100 states, 50081 states have (on average 4.389049739422136) internal successors, (219808), 50099 states have internal predecessors, (219808), 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 00:45:50,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 00:45:50,403 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:50,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:50,404 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 00:45:50,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:50,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1131544199, now seen corresponding path program 1 times [2023-11-12 00:45:50,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:50,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212051671] [2023-11-12 00:45:50,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:50,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:50,800 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 00:45:50,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:50,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212051671] [2023-11-12 00:45:50,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212051671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:50,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:45:50,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:45:50,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9906090] [2023-11-12 00:45:50,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:50,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:45:50,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:50,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:45:50,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:45:51,063 INFO L87 Difference]: Start difference. First operand has 50100 states, 50081 states have (on average 4.389049739422136) internal successors, (219808), 50099 states have internal predecessors, (219808), 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 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 00:45:52,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:52,994 INFO L93 Difference]: Finished difference Result 50391 states and 210509 transitions. [2023-11-12 00:45:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:45:53,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2023-11-12 00:45:53,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:53,915 INFO L225 Difference]: With dead ends: 50391 [2023-11-12 00:45:53,915 INFO L226 Difference]: Without dead ends: 50391 [2023-11-12 00:45:53,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:45:53,919 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 157 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:53,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 95 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:45:54,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50391 states. [2023-11-12 00:45:57,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50391 to 46471. [2023-11-12 00:45:57,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46471 states, 46463 states have (on average 4.18791296300282) internal successors, (194583), 46470 states have internal predecessors, (194583), 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 00:45:57,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46471 states to 46471 states and 194583 transitions. [2023-11-12 00:45:57,832 INFO L78 Accepts]: Start accepts. Automaton has 46471 states and 194583 transitions. Word has length 11 [2023-11-12 00:45:57,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:45:57,832 INFO L495 AbstractCegarLoop]: Abstraction has 46471 states and 194583 transitions. [2023-11-12 00:45:57,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 00:45:57,833 INFO L276 IsEmpty]: Start isEmpty. Operand 46471 states and 194583 transitions. [2023-11-12 00:45:57,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 00:45:57,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:45:57,835 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:45:57,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:45:57,836 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-12 00:45:57,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:45:57,837 INFO L85 PathProgramCache]: Analyzing trace with hash -722044577, now seen corresponding path program 1 times [2023-11-12 00:45:57,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:45:57,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223461366] [2023-11-12 00:45:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:45:57,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:45:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:45:57,967 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 00:45:57,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:45:57,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223461366] [2023-11-12 00:45:57,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223461366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:45:57,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:45:57,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:45:57,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715164357] [2023-11-12 00:45:57,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:45:57,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:45:57,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:45:57,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:45:57,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:45:57,970 INFO L87 Difference]: Start difference. First operand 46471 states and 194583 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 00:45:59,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:45:59,372 INFO L93 Difference]: Finished difference Result 52707 states and 219187 transitions. [2023-11-12 00:45:59,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:45:59,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 13 [2023-11-12 00:45:59,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:45:59,971 INFO L225 Difference]: With dead ends: 52707 [2023-11-12 00:45:59,971 INFO L226 Difference]: Without dead ends: 52707 [2023-11-12 00:45:59,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:45:59,976 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 31 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:45:59,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 42 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:46:00,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52707 states. [2023-11-12 00:46:02,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52707 to 52577. [2023-11-12 00:46:02,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52577 states, 52562 states have (on average 4.162950420455843) internal successors, (218813), 52576 states have internal predecessors, (218813), 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 00:46:02,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52577 states to 52577 states and 218813 transitions. [2023-11-12 00:46:02,968 INFO L78 Accepts]: Start accepts. Automaton has 52577 states and 218813 transitions. Word has length 13 [2023-11-12 00:46:02,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:02,968 INFO L495 AbstractCegarLoop]: Abstraction has 52577 states and 218813 transitions. [2023-11-12 00:46:02,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 00:46:02,969 INFO L276 IsEmpty]: Start isEmpty. Operand 52577 states and 218813 transitions. [2023-11-12 00:46:02,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 00:46:02,971 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:02,971 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-12 00:46:02,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:46:02,972 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-12 00:46:02,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:02,972 INFO L85 PathProgramCache]: Analyzing trace with hash -696220702, now seen corresponding path program 1 times [2023-11-12 00:46:02,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:02,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106730553] [2023-11-12 00:46:02,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:02,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:03,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:46:03,002 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 00:46:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:46:03,024 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-12 00:46:03,025 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 00:46:03,025 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-12 00:46:03,025 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-12 00:46:03,026 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-12 00:46:03,026 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-12 00:46:03,026 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-12 00:46:03,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:46:03,026 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-12 00:46:03,027 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 00:46:03,027 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-12 00:46:03,095 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:46:03,099 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:46:03,100 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 281 places, 297 transitions, 622 flow [2023-11-12 00:46:03,101 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 281 places, 297 transitions, 622 flow [2023-11-12 00:46:03,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 297 transitions, 622 flow [2023-11-12 00:46:03,198 INFO L124 PetriNetUnfolderBase]: 29/347 cut-off events. [2023-11-12 00:46:03,198 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 00:46:03,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 347 events. 29/347 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1098 event pairs, 0 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 276. Up to 10 conditions per place. [2023-11-12 00:46:03,274 INFO L119 LiptonReduction]: Number of co-enabled transitions 58760