./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_19c61f64-fc3e-4060-9059-620a2e387743/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c61f64-fc3e-4060-9059-620a2e387743/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c61f64-fc3e-4060-9059-620a2e387743/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c61f64-fc3e-4060-9059-620a2e387743/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c61f64-fc3e-4060-9059-620a2e387743/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c61f64-fc3e-4060-9059-620a2e387743/bin/utaipan-verify-t7M7D8N6sZ --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 801883caffd8b582a36607f9ec62109ac5c5dc10c811693a281fb396b4b60131 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:13:04,636 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:13:04,724 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c61f64-fc3e-4060-9059-620a2e387743/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:13:04,729 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:13:04,730 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:13:04,756 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:13:04,757 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:13:04,758 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:13:04,758 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:13:04,759 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:13:04,760 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:13:04,760 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:13:04,761 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:13:04,761 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:13:04,762 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:13:04,762 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:13:04,763 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:13:04,763 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:13:04,764 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:13:04,765 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:13:04,765 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:13:04,766 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:13:04,767 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:13:04,767 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:13:04,768 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:13:04,768 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:13:04,768 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:13:04,769 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:13:04,769 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:13:04,770 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:13:04,770 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:13:04,771 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:13:04,771 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:13:04,771 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:13:04,772 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:13:04,772 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:13:04,773 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:13:04,773 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:13:04,773 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:13:04,774 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:13:04,774 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:13:04,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:13:04,775 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:13:04,775 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:13:04,776 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:13:04,776 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_19c61f64-fc3e-4060-9059-620a2e387743/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c61f64-fc3e-4060-9059-620a2e387743/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 801883caffd8b582a36607f9ec62109ac5c5dc10c811693a281fb396b4b60131 [2023-11-19 04:13:05,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:13:05,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:13:05,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:13:05,091 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:13:05,091 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:13:05,094 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c61f64-fc3e-4060-9059-620a2e387743/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i [2023-11-19 04:13:08,319 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:13:08,593 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:13:08,593 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c61f64-fc3e-4060-9059-620a2e387743/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i [2023-11-19 04:13:08,615 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c61f64-fc3e-4060-9059-620a2e387743/bin/utaipan-verify-t7M7D8N6sZ/data/56034a55c/25ec316080b04d129699722bbf582130/FLAG662501633 [2023-11-19 04:13:08,632 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c61f64-fc3e-4060-9059-620a2e387743/bin/utaipan-verify-t7M7D8N6sZ/data/56034a55c/25ec316080b04d129699722bbf582130 [2023-11-19 04:13:08,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:13:08,640 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:13:08,643 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:13:08,644 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:13:08,649 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:13:08,651 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:13:08" (1/1) ... [2023-11-19 04:13:08,652 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63a588d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:08, skipping insertion in model container [2023-11-19 04:13:08,653 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:13:08" (1/1) ... [2023-11-19 04:13:08,714 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:13:09,081 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_19c61f64-fc3e-4060-9059-620a2e387743/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i[30570,30583] [2023-11-19 04:13:09,093 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:13:09,108 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:13:09,178 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_19c61f64-fc3e-4060-9059-620a2e387743/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i[30570,30583] [2023-11-19 04:13:09,190 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:13:09,247 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:13:09,248 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:09 WrapperNode [2023-11-19 04:13:09,248 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:13:09,249 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:13:09,249 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:13:09,250 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:13:09,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:09" (1/1) ... [2023-11-19 04:13:09,274 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:09" (1/1) ... [2023-11-19 04:13:09,300 INFO L138 Inliner]: procedures = 164, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2023-11-19 04:13:09,301 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:13:09,301 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:13:09,302 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:13:09,302 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:13:09,312 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:09" (1/1) ... [2023-11-19 04:13:09,312 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:09" (1/1) ... [2023-11-19 04:13:09,316 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:09" (1/1) ... [2023-11-19 04:13:09,317 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:09" (1/1) ... [2023-11-19 04:13:09,324 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:09" (1/1) ... [2023-11-19 04:13:09,327 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:09" (1/1) ... [2023-11-19 04:13:09,330 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:09" (1/1) ... [2023-11-19 04:13:09,331 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:09" (1/1) ... [2023-11-19 04:13:09,334 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:13:09,336 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:13:09,336 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:13:09,336 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:13:09,337 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:09" (1/1) ... [2023-11-19 04:13:09,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:13:09,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c61f64-fc3e-4060-9059-620a2e387743/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:13:09,396 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c61f64-fc3e-4060-9059-620a2e387743/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:13:09,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19c61f64-fc3e-4060-9059-620a2e387743/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:13:09,445 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-19 04:13:09,445 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-19 04:13:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:13:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 04:13:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:13:09,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:13:09,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:13:09,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:13:09,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:13:09,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:13:09,452 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 04:13:09,662 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:13:09,665 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:13:09,901 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:13:09,909 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:13:09,910 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:13:09,913 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:13:09 BoogieIcfgContainer [2023-11-19 04:13:09,914 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:13:09,916 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:13:09,917 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:13:09,920 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:13:09,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:13:08" (1/3) ... [2023-11-19 04:13:09,921 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@143192cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:13:09, skipping insertion in model container [2023-11-19 04:13:09,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:13:09" (2/3) ... [2023-11-19 04:13:09,922 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@143192cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:13:09, skipping insertion in model container [2023-11-19 04:13:09,922 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:13:09" (3/3) ... [2023-11-19 04:13:09,923 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs-pthread.i [2023-11-19 04:13:09,932 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 04:13:09,943 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:13:09,943 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 04:13:09,943 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 04:13:09,988 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 04:13:10,036 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-19 04:13:10,064 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 69 transitions, 142 flow [2023-11-19 04:13:10,076 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 69 transitions, 142 flow [2023-11-19 04:13:10,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 69 transitions, 142 flow [2023-11-19 04:13:10,143 INFO L124 PetriNetUnfolderBase]: 5/104 cut-off events. [2023-11-19 04:13:10,144 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 04:13:10,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 104 events. 5/104 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 189 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 52. Up to 4 conditions per place. [2023-11-19 04:13:10,154 INFO L119 LiptonReduction]: Number of co-enabled transitions 988 [2023-11-19 04:13:12,351 INFO L134 LiptonReduction]: Checked pairs total: 2555 [2023-11-19 04:13:12,351 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-11-19 04:13:12,360 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 19 transitions, 42 flow [2023-11-19 04:13:12,385 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 67 states, 61 states have (on average 2.0) internal successors, (122), 66 states have internal predecessors, (122), 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) [2023-11-19 04:13:12,409 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:13:12,417 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;@1fa14b2c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:13:12,417 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 04:13:12,420 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 61 states have (on average 2.0) internal successors, (122), 66 states have internal predecessors, (122), 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) [2023-11-19 04:13:12,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 04:13:12,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:12,425 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-19 04:13:12,426 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 04:13:12,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:12,431 INFO L85 PathProgramCache]: Analyzing trace with hash 8241059, now seen corresponding path program 1 times [2023-11-19 04:13:12,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:12,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32868917] [2023-11-19 04:13:12,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:12,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:12,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:12,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32868917] [2023-11-19 04:13:12,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32868917] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:12,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:12,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:13:12,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058422576] [2023-11-19 04:13:12,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:12,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:13:12,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:12,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:13:12,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:13:12,807 INFO L87 Difference]: Start difference. First operand has 67 states, 61 states have (on average 2.0) internal successors, (122), 66 states have internal predecessors, (122), 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 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-19 04:13:12,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:12,877 INFO L93 Difference]: Finished difference Result 58 states and 88 transitions. [2023-11-19 04:13:12,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:13:12,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2023-11-19 04:13:12,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:12,888 INFO L225 Difference]: With dead ends: 58 [2023-11-19 04:13:12,888 INFO L226 Difference]: Without dead ends: 46 [2023-11-19 04:13:12,889 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 [2023-11-19 04:13:12,894 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:12,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 9 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:13:12,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-19 04:13:12,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-19 04:13:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.627906976744186) internal successors, (70), 45 states have internal predecessors, (70), 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) [2023-11-19 04:13:12,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 70 transitions. [2023-11-19 04:13:12,945 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 70 transitions. Word has length 4 [2023-11-19 04:13:12,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:12,946 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 70 transitions. [2023-11-19 04:13:12,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-19 04:13:12,947 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 70 transitions. [2023-11-19 04:13:12,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 04:13:12,949 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:12,949 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 04:13:12,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:13:12,950 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-19 04:13:12,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:12,952 INFO L85 PathProgramCache]: Analyzing trace with hash -674673979, now seen corresponding path program 1 times [2023-11-19 04:13:12,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:12,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320427295] [2023-11-19 04:13:12,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:12,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:13:13,012 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 04:13:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:13:13,045 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-19 04:13:13,045 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 04:13:13,047 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-19 04:13:13,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-19 04:13:13,050 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-19 04:13:13,050 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-19 04:13:13,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:13:13,053 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 04:13:13,055 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 04:13:13,055 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 04:13:13,072 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 04:13:13,076 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-19 04:13:13,076 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 83 transitions, 176 flow [2023-11-19 04:13:13,077 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 83 transitions, 176 flow [2023-11-19 04:13:13,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 83 transitions, 176 flow [2023-11-19 04:13:13,116 INFO L124 PetriNetUnfolderBase]: 8/155 cut-off events. [2023-11-19 04:13:13,117 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 04:13:13,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 155 events. 8/155 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 374 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 105. Up to 6 conditions per place. [2023-11-19 04:13:13,123 INFO L119 LiptonReduction]: Number of co-enabled transitions 2340 [2023-11-19 04:13:15,657 INFO L134 LiptonReduction]: Checked pairs total: 7322 [2023-11-19 04:13:15,658 INFO L136 LiptonReduction]: Total number of compositions: 78 [2023-11-19 04:13:15,659 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 28 transitions, 66 flow [2023-11-19 04:13:15,716 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 579 states, 564 states have (on average 2.904255319148936) internal successors, (1638), 578 states have internal predecessors, (1638), 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) [2023-11-19 04:13:15,718 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:13:15,719 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;@1fa14b2c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:13:15,719 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 04:13:15,722 INFO L276 IsEmpty]: Start isEmpty. Operand has 579 states, 564 states have (on average 2.904255319148936) internal successors, (1638), 578 states have internal predecessors, (1638), 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) [2023-11-19 04:13:15,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 04:13:15,723 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:15,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-19 04:13:15,723 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 04:13:15,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:15,724 INFO L85 PathProgramCache]: Analyzing trace with hash 13570742, now seen corresponding path program 1 times [2023-11-19 04:13:15,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:15,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084298551] [2023-11-19 04:13:15,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:15,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:15,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:15,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084298551] [2023-11-19 04:13:15,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084298551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:15,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:15,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:13:15,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285038851] [2023-11-19 04:13:15,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:15,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:13:15,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:15,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:13:15,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:13:15,873 INFO L87 Difference]: Start difference. First operand has 579 states, 564 states have (on average 2.904255319148936) internal successors, (1638), 578 states have internal predecessors, (1638), 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 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-19 04:13:16,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:16,002 INFO L93 Difference]: Finished difference Result 607 states and 1417 transitions. [2023-11-19 04:13:16,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:13:16,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2023-11-19 04:13:16,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:16,017 INFO L225 Difference]: With dead ends: 607 [2023-11-19 04:13:16,018 INFO L226 Difference]: Without dead ends: 563 [2023-11-19 04:13:16,018 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 [2023-11-19 04:13:16,020 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:16,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:13:16,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2023-11-19 04:13:16,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 511. [2023-11-19 04:13:16,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 500 states have (on average 2.41) internal successors, (1205), 510 states have internal predecessors, (1205), 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) [2023-11-19 04:13:16,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1205 transitions. [2023-11-19 04:13:16,086 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1205 transitions. Word has length 4 [2023-11-19 04:13:16,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:16,087 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 1205 transitions. [2023-11-19 04:13:16,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-19 04:13:16,087 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1205 transitions. [2023-11-19 04:13:16,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 04:13:16,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:16,089 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 04:13:16,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:13:16,090 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-19 04:13:16,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:16,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1142942225, now seen corresponding path program 1 times [2023-11-19 04:13:16,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:16,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589725638] [2023-11-19 04:13:16,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:16,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:13:16,124 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 04:13:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:13:16,148 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-19 04:13:16,148 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 04:13:16,148 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-19 04:13:16,149 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-19 04:13:16,149 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-19 04:13:16,149 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-19 04:13:16,150 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-19 04:13:16,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:13:16,150 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 04:13:16,151 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 04:13:16,151 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 04:13:16,185 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 04:13:16,196 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-19 04:13:16,196 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 97 transitions, 212 flow [2023-11-19 04:13:16,196 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 97 transitions, 212 flow [2023-11-19 04:13:16,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 97 transitions, 212 flow [2023-11-19 04:13:16,273 INFO L124 PetriNetUnfolderBase]: 11/206 cut-off events. [2023-11-19 04:13:16,273 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 04:13:16,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 206 events. 11/206 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 543 event pairs, 0 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 159. Up to 8 conditions per place. [2023-11-19 04:13:16,285 INFO L119 LiptonReduction]: Number of co-enabled transitions 4056 [2023-11-19 04:13:18,663 INFO L134 LiptonReduction]: Checked pairs total: 11806 [2023-11-19 04:13:18,663 INFO L136 LiptonReduction]: Total number of compositions: 83 [2023-11-19 04:13:18,665 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 34 transitions, 86 flow [2023-11-19 04:13:18,931 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 4222 states, 4188 states have (on average 3.6074498567335245) internal successors, (15108), 4221 states have internal predecessors, (15108), 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) [2023-11-19 04:13:18,935 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:13:18,943 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;@1fa14b2c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:13:18,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 04:13:18,964 INFO L276 IsEmpty]: Start isEmpty. Operand has 4222 states, 4188 states have (on average 3.6074498567335245) internal successors, (15108), 4221 states have internal predecessors, (15108), 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) [2023-11-19 04:13:18,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 04:13:18,965 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:18,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-19 04:13:18,966 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 04:13:18,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:18,967 INFO L85 PathProgramCache]: Analyzing trace with hash 19540324, now seen corresponding path program 1 times [2023-11-19 04:13:18,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:18,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446791436] [2023-11-19 04:13:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:18,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:19,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:19,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446791436] [2023-11-19 04:13:19,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446791436] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:19,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:19,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:13:19,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951596213] [2023-11-19 04:13:19,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:19,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:13:19,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:19,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:13:19,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:13:19,077 INFO L87 Difference]: Start difference. First operand has 4222 states, 4188 states have (on average 3.6074498567335245) internal successors, (15108), 4221 states have internal predecessors, (15108), 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 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-19 04:13:19,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:19,285 INFO L93 Difference]: Finished difference Result 5286 states and 16523 transitions. [2023-11-19 04:13:19,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:13:19,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2023-11-19 04:13:19,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:19,340 INFO L225 Difference]: With dead ends: 5286 [2023-11-19 04:13:19,340 INFO L226 Difference]: Without dead ends: 5154 [2023-11-19 04:13:19,340 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 [2023-11-19 04:13:19,341 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:19,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 15 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:13:19,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5154 states. [2023-11-19 04:13:19,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5154 to 4458. [2023-11-19 04:13:19,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4458 states, 4429 states have (on average 3.1901106344547303) internal successors, (14129), 4457 states have internal predecessors, (14129), 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) [2023-11-19 04:13:19,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4458 states to 4458 states and 14129 transitions. [2023-11-19 04:13:19,573 INFO L78 Accepts]: Start accepts. Automaton has 4458 states and 14129 transitions. Word has length 4 [2023-11-19 04:13:19,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:19,574 INFO L495 AbstractCegarLoop]: Abstraction has 4458 states and 14129 transitions. [2023-11-19 04:13:19,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-19 04:13:19,574 INFO L276 IsEmpty]: Start isEmpty. Operand 4458 states and 14129 transitions. [2023-11-19 04:13:19,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 04:13:19,576 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:19,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:19,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:13:19,576 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 04:13:19,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:19,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1353963890, now seen corresponding path program 1 times [2023-11-19 04:13:19,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:19,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464628361] [2023-11-19 04:13:19,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:19,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:19,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:19,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464628361] [2023-11-19 04:13:19,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464628361] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:19,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:19,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:13:19,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788853234] [2023-11-19 04:13:19,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:19,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:13:19,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:19,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:13:19,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:13:19,657 INFO L87 Difference]: Start difference. First operand 4458 states and 14129 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-11-19 04:13:19,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:19,693 INFO L93 Difference]: Finished difference Result 466 states and 813 transitions. [2023-11-19 04:13:19,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:13:19,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2023-11-19 04:13:19,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:19,697 INFO L225 Difference]: With dead ends: 466 [2023-11-19 04:13:19,697 INFO L226 Difference]: Without dead ends: 387 [2023-11-19 04:13:19,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:13:19,698 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:19,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:13:19,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-11-19 04:13:19,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2023-11-19 04:13:19,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.8937823834196892) internal successors, (731), 386 states have internal predecessors, (731), 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) [2023-11-19 04:13:19,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 731 transitions. [2023-11-19 04:13:19,712 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 731 transitions. Word has length 12 [2023-11-19 04:13:19,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:19,712 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 731 transitions. [2023-11-19 04:13:19,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-11-19 04:13:19,713 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 731 transitions. [2023-11-19 04:13:19,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 04:13:19,714 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:19,714 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-19 04:13:19,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:13:19,715 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-19 04:13:19,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:19,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1046089680, now seen corresponding path program 1 times [2023-11-19 04:13:19,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:19,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993077702] [2023-11-19 04:13:19,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:19,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:13:19,731 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 04:13:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:13:19,744 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-19 04:13:19,745 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 04:13:19,745 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-19 04:13:19,745 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-19 04:13:19,746 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-19 04:13:19,746 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-19 04:13:19,746 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-19 04:13:19,746 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-19 04:13:19,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:13:19,747 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-19 04:13:19,747 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 04:13:19,747 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-19 04:13:19,764 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 04:13:19,766 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-19 04:13:19,767 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 111 transitions, 250 flow [2023-11-19 04:13:19,767 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 111 transitions, 250 flow [2023-11-19 04:13:19,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 111 transitions, 250 flow [2023-11-19 04:13:19,803 INFO L124 PetriNetUnfolderBase]: 14/257 cut-off events. [2023-11-19 04:13:19,804 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 04:13:19,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 257 events. 14/257 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 697 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 214. Up to 10 conditions per place. [2023-11-19 04:13:19,814 INFO L119 LiptonReduction]: Number of co-enabled transitions 6136 [2023-11-19 04:13:22,368 INFO L134 LiptonReduction]: Checked pairs total: 19666 [2023-11-19 04:13:22,368 INFO L136 LiptonReduction]: Total number of compositions: 102 [2023-11-19 04:13:22,369 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 44 transitions, 116 flow [2023-11-19 04:13:24,471 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30047 states, 29974 states have (on average 4.8577433775939145) internal successors, (145606), 30046 states have internal predecessors, (145606), 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) [2023-11-19 04:13:24,473 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:13:24,474 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;@1fa14b2c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:13:24,474 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 04:13:24,575 INFO L276 IsEmpty]: Start isEmpty. Operand has 30047 states, 29974 states have (on average 4.8577433775939145) internal successors, (145606), 30046 states have internal predecessors, (145606), 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) [2023-11-19 04:13:24,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 04:13:24,576 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:24,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-19 04:13:24,576 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 04:13:24,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:24,577 INFO L85 PathProgramCache]: Analyzing trace with hash 26552235, now seen corresponding path program 1 times [2023-11-19 04:13:24,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:24,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455852407] [2023-11-19 04:13:24,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:24,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:24,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:24,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455852407] [2023-11-19 04:13:24,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455852407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:24,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:24,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:13:24,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500208713] [2023-11-19 04:13:24,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:24,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:13:24,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:24,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:13:24,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:13:24,869 INFO L87 Difference]: Start difference. First operand has 30047 states, 29974 states have (on average 4.8577433775939145) internal successors, (145606), 30046 states have internal predecessors, (145606), 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 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-19 04:13:26,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:26,143 INFO L93 Difference]: Finished difference Result 42993 states and 168089 transitions. [2023-11-19 04:13:26,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:13:26,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2023-11-19 04:13:26,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:26,813 INFO L225 Difference]: With dead ends: 42993 [2023-11-19 04:13:26,813 INFO L226 Difference]: Without dead ends: 42637 [2023-11-19 04:13:26,814 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 [2023-11-19 04:13:26,816 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:26,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 18 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:13:26,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42637 states. [2023-11-19 04:13:28,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42637 to 36351. [2023-11-19 04:13:28,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36351 states, 36284 states have (on average 3.98318818211884) internal successors, (144526), 36350 states have internal predecessors, (144526), 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) [2023-11-19 04:13:29,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36351 states to 36351 states and 144526 transitions. [2023-11-19 04:13:29,270 INFO L78 Accepts]: Start accepts. Automaton has 36351 states and 144526 transitions. Word has length 4 [2023-11-19 04:13:29,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:29,270 INFO L495 AbstractCegarLoop]: Abstraction has 36351 states and 144526 transitions. [2023-11-19 04:13:29,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-11-19 04:13:29,270 INFO L276 IsEmpty]: Start isEmpty. Operand 36351 states and 144526 transitions. [2023-11-19 04:13:29,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 04:13:29,272 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:29,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:29,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:13:29,272 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 04:13:29,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:29,273 INFO L85 PathProgramCache]: Analyzing trace with hash 25788224, now seen corresponding path program 1 times [2023-11-19 04:13:29,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:29,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377051741] [2023-11-19 04:13:29,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:29,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:29,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:29,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377051741] [2023-11-19 04:13:29,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377051741] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:29,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:29,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:13:29,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782661772] [2023-11-19 04:13:29,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:29,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:13:29,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:29,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:13:29,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:13:29,375 INFO L87 Difference]: Start difference. First operand 36351 states and 144526 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-11-19 04:13:29,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:13:29,633 INFO L93 Difference]: Finished difference Result 1297 states and 2312 transitions. [2023-11-19 04:13:29,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:13:29,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2023-11-19 04:13:29,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:13:29,647 INFO L225 Difference]: With dead ends: 1297 [2023-11-19 04:13:29,647 INFO L226 Difference]: Without dead ends: 1051 [2023-11-19 04:13:29,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:13:29,648 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:13:29,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 21 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:13:29,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2023-11-19 04:13:29,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1051. [2023-11-19 04:13:29,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1050 states have (on average 1.9495238095238094) internal successors, (2047), 1050 states have internal predecessors, (2047), 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) [2023-11-19 04:13:29,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 2047 transitions. [2023-11-19 04:13:29,680 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 2047 transitions. Word has length 12 [2023-11-19 04:13:29,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:13:29,681 INFO L495 AbstractCegarLoop]: Abstraction has 1051 states and 2047 transitions. [2023-11-19 04:13:29,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-11-19 04:13:29,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 2047 transitions. [2023-11-19 04:13:29,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 04:13:29,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:29,683 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-19 04:13:29,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 04:13:29,684 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 04:13:29,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:29,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1572609071, now seen corresponding path program 1 times [2023-11-19 04:13:29,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:29,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021381565] [2023-11-19 04:13:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:29,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:13:29,706 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 04:13:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:13:29,747 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-19 04:13:29,750 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 04:13:29,750 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 04:13:29,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-19 04:13:29,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-19 04:13:29,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-19 04:13:29,751 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-19 04:13:29,752 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-19 04:13:29,752 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-19 04:13:29,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 04:13:29,753 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-19 04:13:29,753 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 04:13:29,753 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-19 04:13:29,782 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 04:13:29,787 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-19 04:13:29,787 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 125 transitions, 290 flow [2023-11-19 04:13:29,787 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 125 transitions, 290 flow [2023-11-19 04:13:29,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 125 transitions, 290 flow [2023-11-19 04:13:29,856 INFO L124 PetriNetUnfolderBase]: 17/308 cut-off events. [2023-11-19 04:13:29,856 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-19 04:13:29,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 308 events. 17/308 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 879 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 270. Up to 12 conditions per place. [2023-11-19 04:13:29,871 INFO L119 LiptonReduction]: Number of co-enabled transitions 8580 [2023-11-19 04:13:33,151 INFO L134 LiptonReduction]: Checked pairs total: 29387 [2023-11-19 04:13:33,151 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-11-19 04:13:33,154 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 57 places, 52 transitions, 144 flow [2023-11-19 04:13:44,088 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 211794 states, 211642 states have (on average 5.856266714546262) internal successors, (1239432), 211793 states have internal predecessors, (1239432), 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) [2023-11-19 04:13:44,091 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:13:44,092 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;@1fa14b2c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:13:44,093 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-19 04:13:44,524 INFO L276 IsEmpty]: Start isEmpty. Operand has 211794 states, 211642 states have (on average 5.856266714546262) internal successors, (1239432), 211793 states have internal predecessors, (1239432), 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) [2023-11-19 04:13:44,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 04:13:44,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:13:44,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-19 04:13:44,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-19 04:13:44,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:13:44,526 INFO L85 PathProgramCache]: Analyzing trace with hash 34344573, now seen corresponding path program 1 times [2023-11-19 04:13:44,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:13:44,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778124082] [2023-11-19 04:13:44,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:13:44,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:13:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:13:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:13:44,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:13:44,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778124082] [2023-11-19 04:13:44,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778124082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:13:44,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:13:44,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:13:44,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867182595] [2023-11-19 04:13:44,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:13:44,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:13:44,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:13:44,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:13:44,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:13:45,043 INFO L87 Difference]: Start difference. First operand has 211794 states, 211642 states have (on average 5.856266714546262) internal successors, (1239432), 211793 states have internal predecessors, (1239432), 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 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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)