./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/03_incdec.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c8ff0c-ea52-432f-8fe6-989801998299/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c8ff0c-ea52-432f-8fe6-989801998299/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c8ff0c-ea52-432f-8fe6-989801998299/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c8ff0c-ea52-432f-8fe6-989801998299/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/03_incdec.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c8ff0c-ea52-432f-8fe6-989801998299/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c8ff0c-ea52-432f-8fe6-989801998299/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c1c717c54832d7b18d55a1459c6f740661389c67176a032001ce64e3c282b955 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:56:12,151 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:56:12,229 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c8ff0c-ea52-432f-8fe6-989801998299/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:56:12,234 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:56:12,235 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:56:12,264 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:56:12,264 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:56:12,265 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:56:12,266 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:56:12,266 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:56:12,267 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:56:12,268 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:56:12,268 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:56:12,269 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:56:12,270 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:56:12,270 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:56:12,271 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:56:12,271 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:56:12,272 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:56:12,272 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:56:12,273 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:56:12,274 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:56:12,274 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:56:12,275 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:56:12,275 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:56:12,276 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:56:12,276 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:56:12,277 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:56:12,278 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:56:12,278 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:56:12,279 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:56:12,279 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:56:12,280 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:56:12,280 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:56:12,281 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:56:12,281 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:56:12,282 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:56:12,283 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:56:12,283 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:56:12,284 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:56:12,284 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:56:12,285 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:56:12,286 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:56:12,286 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:56:12,287 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:56:12,287 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_79c8ff0c-ea52-432f-8fe6-989801998299/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c8ff0c-ea52-432f-8fe6-989801998299/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1c717c54832d7b18d55a1459c6f740661389c67176a032001ce64e3c282b955 [2023-11-12 00:56:12,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:56:12,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:56:12,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:56:12,697 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:56:12,698 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:56:12,700 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c8ff0c-ea52-432f-8fe6-989801998299/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/pthread-ext/03_incdec.i [2023-11-12 00:56:16,156 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:56:16,469 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:56:16,470 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c8ff0c-ea52-432f-8fe6-989801998299/sv-benchmarks/c/pthread-ext/03_incdec.i [2023-11-12 00:56:16,486 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c8ff0c-ea52-432f-8fe6-989801998299/bin/utaipan-verify-NcY6lQBIFX/data/f63ef17e0/078fa53fc1d946a196195fff970eb2b0/FLAGb24bfe936 [2023-11-12 00:56:16,503 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c8ff0c-ea52-432f-8fe6-989801998299/bin/utaipan-verify-NcY6lQBIFX/data/f63ef17e0/078fa53fc1d946a196195fff970eb2b0 [2023-11-12 00:56:16,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:56:16,512 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:56:16,514 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:56:16,514 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:56:16,520 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:56:16,522 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:56:16" (1/1) ... [2023-11-12 00:56:16,524 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31c0eeb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:16, skipping insertion in model container [2023-11-12 00:56:16,524 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:56:16" (1/1) ... [2023-11-12 00:56:16,604 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:56:16,967 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_79c8ff0c-ea52-432f-8fe6-989801998299/sv-benchmarks/c/pthread-ext/03_incdec.i[30534,30547] [2023-11-12 00:56:16,979 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_79c8ff0c-ea52-432f-8fe6-989801998299/sv-benchmarks/c/pthread-ext/03_incdec.i[30928,30941] [2023-11-12 00:56:16,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:56:17,003 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:56:17,065 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_79c8ff0c-ea52-432f-8fe6-989801998299/sv-benchmarks/c/pthread-ext/03_incdec.i[30534,30547] [2023-11-12 00:56:17,067 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_79c8ff0c-ea52-432f-8fe6-989801998299/sv-benchmarks/c/pthread-ext/03_incdec.i[30928,30941] [2023-11-12 00:56:17,079 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:56:17,131 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:56:17,132 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:17 WrapperNode [2023-11-12 00:56:17,132 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:56:17,134 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:56:17,134 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:56:17,134 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:56:17,142 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:17" (1/1) ... [2023-11-12 00:56:17,161 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:17" (1/1) ... [2023-11-12 00:56:17,194 INFO L138 Inliner]: procedures = 172, calls = 24, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 133 [2023-11-12 00:56:17,194 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:56:17,195 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:56:17,195 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:56:17,195 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:56:17,205 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:17" (1/1) ... [2023-11-12 00:56:17,206 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:17" (1/1) ... [2023-11-12 00:56:17,227 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:17" (1/1) ... [2023-11-12 00:56:17,228 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:17" (1/1) ... [2023-11-12 00:56:17,236 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:17" (1/1) ... [2023-11-12 00:56:17,253 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:17" (1/1) ... [2023-11-12 00:56:17,256 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:17" (1/1) ... [2023-11-12 00:56:17,257 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:17" (1/1) ... [2023-11-12 00:56:17,261 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:56:17,263 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:56:17,263 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:56:17,263 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:56:17,264 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:17" (1/1) ... [2023-11-12 00:56:17,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:56:17,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c8ff0c-ea52-432f-8fe6-989801998299/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:56:17,306 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c8ff0c-ea52-432f-8fe6-989801998299/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:56:17,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79c8ff0c-ea52-432f-8fe6-989801998299/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:56:17,345 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-12 00:56:17,345 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-12 00:56:17,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:56:17,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:56:17,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:56:17,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:56:17,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:56:17,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:56:17,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:56:17,348 WARN L210 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 00:56:17,483 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:56:17,485 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:56:17,738 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:56:17,919 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:56:17,920 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:56:17,922 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:56:17 BoogieIcfgContainer [2023-11-12 00:56:17,922 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:56:17,925 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:56:17,925 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:56:17,928 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:56:17,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:56:16" (1/3) ... [2023-11-12 00:56:17,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de14b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:56:17, skipping insertion in model container [2023-11-12 00:56:17,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:17" (2/3) ... [2023-11-12 00:56:17,930 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1de14b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:56:17, skipping insertion in model container [2023-11-12 00:56:17,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:56:17" (3/3) ... [2023-11-12 00:56:17,931 INFO L112 eAbstractionObserver]: Analyzing ICFG 03_incdec.i [2023-11-12 00:56:17,940 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 00:56:17,950 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:56:17,950 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 00:56:17,951 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 00:56:18,006 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:56:18,040 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:56:18,054 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 83 transitions, 170 flow [2023-11-12 00:56:18,057 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 83 transitions, 170 flow [2023-11-12 00:56:18,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 83 transitions, 170 flow [2023-11-12 00:56:18,105 INFO L124 PetriNetUnfolderBase]: 7/94 cut-off events. [2023-11-12 00:56:18,105 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 00:56:18,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 186 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-11-12 00:56:18,114 INFO L119 LiptonReduction]: Number of co-enabled transitions 1540 [2023-11-12 00:56:23,839 INFO L134 LiptonReduction]: Checked pairs total: 1514 [2023-11-12 00:56:23,841 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-11-12 00:56:23,852 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 12 places, 9 transitions, 22 flow [2023-11-12 00:56:23,870 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 22 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:23,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:56:23,911 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;@5f5556a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:56:23,912 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-12 00:56:23,914 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:23,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 00:56:23,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:23,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 00:56:23,931 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 00:56:23,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:23,942 INFO L85 PathProgramCache]: Analyzing trace with hash 18786765, now seen corresponding path program 1 times [2023-11-12 00:56:23,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:23,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112346995] [2023-11-12 00:56:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:23,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:24,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:24,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112346995] [2023-11-12 00:56:24,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112346995] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:24,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:24,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:56:24,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429432847] [2023-11-12 00:56:24,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:24,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:56:24,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:24,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:56:24,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:56:24,290 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 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) [2023-11-12 00:56:24,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:24,340 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2023-11-12 00:56:24,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:56:24,342 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 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 [2023-11-12 00:56:24,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:24,352 INFO L225 Difference]: With dead ends: 11 [2023-11-12 00:56:24,352 INFO L226 Difference]: Without dead ends: 11 [2023-11-12 00:56:24,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:56:24,360 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:24,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:56:24,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-12 00:56:24,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-12 00:56:24,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:24,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-11-12 00:56:24,407 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 4 [2023-11-12 00:56:24,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:24,410 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-11-12 00:56:24,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 4.0) internal successors, (4), 2 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) [2023-11-12 00:56:24,411 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-11-12 00:56:24,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:56:24,412 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:24,412 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-12 00:56:24,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:56:24,413 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 00:56:24,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:24,414 INFO L85 PathProgramCache]: Analyzing trace with hash 874153935, now seen corresponding path program 1 times [2023-11-12 00:56:24,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:24,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832833026] [2023-11-12 00:56:24,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:24,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:56:24,477 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 00:56:24,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:56:24,526 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-12 00:56:24,527 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 00:56:24,529 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-12 00:56:24,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-12 00:56:24,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-12 00:56:24,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-12 00:56:24,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-12 00:56:24,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:56:24,535 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-12 00:56:24,538 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 00:56:24,538 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 00:56:24,585 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:56:24,590 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:56:24,590 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 139 transitions, 288 flow [2023-11-12 00:56:24,591 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 139 transitions, 288 flow [2023-11-12 00:56:24,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 139 transitions, 288 flow [2023-11-12 00:56:24,639 INFO L124 PetriNetUnfolderBase]: 13/163 cut-off events. [2023-11-12 00:56:24,639 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 00:56:24,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 163 events. 13/163 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 518 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 123. Up to 6 conditions per place. [2023-11-12 00:56:24,652 INFO L119 LiptonReduction]: Number of co-enabled transitions 9240 [2023-11-12 00:56:28,818 INFO L134 LiptonReduction]: Checked pairs total: 50020 [2023-11-12 00:56:28,818 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-11-12 00:56:28,820 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 58 transitions, 126 flow [2023-11-12 00:56:29,021 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2987 states, 2968 states have (on average 3.075808625336927) internal successors, (9129), 2986 states have internal predecessors, (9129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:29,022 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:56:29,024 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;@5f5556a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:56:29,024 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-12 00:56:29,036 INFO L276 IsEmpty]: Start isEmpty. Operand has 2987 states, 2968 states have (on average 3.075808625336927) internal successors, (9129), 2986 states have internal predecessors, (9129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:29,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 00:56:29,044 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:29,044 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:29,044 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-12 00:56:29,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:29,045 INFO L85 PathProgramCache]: Analyzing trace with hash -812502883, now seen corresponding path program 1 times [2023-11-12 00:56:29,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:29,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972635666] [2023-11-12 00:56:29,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:29,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:29,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:29,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972635666] [2023-11-12 00:56:29,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972635666] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:29,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:29,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:56:29,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966714760] [2023-11-12 00:56:29,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:29,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:56:29,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:29,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:56:29,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:56:29,602 INFO L87 Difference]: Start difference. First operand has 2987 states, 2968 states have (on average 3.075808625336927) internal successors, (9129), 2986 states have internal predecessors, (9129), 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 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:29,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:29,975 INFO L93 Difference]: Finished difference Result 1790 states and 4831 transitions. [2023-11-12 00:56:29,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:56:29,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-12 00:56:29,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:30,012 INFO L225 Difference]: With dead ends: 1790 [2023-11-12 00:56:30,012 INFO L226 Difference]: Without dead ends: 1790 [2023-11-12 00:56:30,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:56:30,016 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 74 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:30,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 64 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:56:30,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2023-11-12 00:56:30,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1570. [2023-11-12 00:56:30,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1562 states have (on average 2.7464788732394365) internal successors, (4290), 1569 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:30,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 4290 transitions. [2023-11-12 00:56:30,178 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 4290 transitions. Word has length 11 [2023-11-12 00:56:30,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:30,179 INFO L495 AbstractCegarLoop]: Abstraction has 1570 states and 4290 transitions. [2023-11-12 00:56:30,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:30,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 4290 transitions. [2023-11-12 00:56:30,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 00:56:30,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:30,188 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-12 00:56:30,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:56:30,188 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-12 00:56:30,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:30,189 INFO L85 PathProgramCache]: Analyzing trace with hash -2021892665, now seen corresponding path program 1 times [2023-11-12 00:56:30,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:30,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887197223] [2023-11-12 00:56:30,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:30,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:56:30,232 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 00:56:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:56:30,252 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-12 00:56:30,253 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 00:56:30,253 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-12 00:56:30,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-12 00:56:30,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-12 00:56:30,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-12 00:56:30,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-12 00:56:30,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-12 00:56:30,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-12 00:56:30,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:56:30,256 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-12 00:56:30,256 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 00:56:30,256 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-12 00:56:30,297 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:56:30,301 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:56:30,301 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 195 transitions, 408 flow [2023-11-12 00:56:30,302 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 195 transitions, 408 flow [2023-11-12 00:56:30,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 195 transitions, 408 flow [2023-11-12 00:56:30,408 INFO L124 PetriNetUnfolderBase]: 19/232 cut-off events. [2023-11-12 00:56:30,408 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 00:56:30,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 232 events. 19/232 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 851 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 178. Up to 8 conditions per place. [2023-11-12 00:56:30,437 INFO L119 LiptonReduction]: Number of co-enabled transitions 23100 [2023-11-12 00:56:36,882 INFO L134 LiptonReduction]: Checked pairs total: 117206 [2023-11-12 00:56:36,882 INFO L136 LiptonReduction]: Total number of compositions: 196 [2023-11-12 00:56:36,885 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 79 places, 84 transitions, 186 flow [2023-11-12 00:56:40,753 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 66266 states, 66203 states have (on average 4.203268734045285) internal successors, (278269), 66265 states have internal predecessors, (278269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:40,759 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:56:40,761 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;@5f5556a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:56:40,761 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-12 00:56:41,048 INFO L276 IsEmpty]: Start isEmpty. Operand has 66266 states, 66203 states have (on average 4.203268734045285) internal successors, (278269), 66265 states have internal predecessors, (278269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:41,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 00:56:41,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:41,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:41,055 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-12 00:56:41,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:41,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1668577830, now seen corresponding path program 1 times [2023-11-12 00:56:41,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:41,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064607752] [2023-11-12 00:56:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:41,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:41,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:56:41,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:41,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064607752] [2023-11-12 00:56:41,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064607752] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:41,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:41,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:56:41,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852424109] [2023-11-12 00:56:41,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:41,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:56:41,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:41,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:56:41,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:56:41,802 INFO L87 Difference]: Start difference. First operand has 66266 states, 66203 states have (on average 4.203268734045285) internal successors, (278269), 66265 states have internal predecessors, (278269), 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 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:43,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:43,944 INFO L93 Difference]: Finished difference Result 48698 states and 185282 transitions. [2023-11-12 00:56:43,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:56:43,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-12 00:56:43,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:44,688 INFO L225 Difference]: With dead ends: 48698 [2023-11-12 00:56:44,688 INFO L226 Difference]: Without dead ends: 48698 [2023-11-12 00:56:44,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:56:44,690 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 192 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:44,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 88 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:56:44,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48698 states. [2023-11-12 00:56:47,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48698 to 41598. [2023-11-12 00:56:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41598 states, 41572 states have (on average 3.826686231117098) internal successors, (159083), 41597 states have internal predecessors, (159083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41598 states to 41598 states and 159083 transitions. [2023-11-12 00:56:48,597 INFO L78 Accepts]: Start accepts. Automaton has 41598 states and 159083 transitions. Word has length 11 [2023-11-12 00:56:48,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:48,600 INFO L495 AbstractCegarLoop]: Abstraction has 41598 states and 159083 transitions. [2023-11-12 00:56:48,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:56:48,601 INFO L276 IsEmpty]: Start isEmpty. Operand 41598 states and 159083 transitions. [2023-11-12 00:56:48,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 00:56:48,609 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:48,609 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-12 00:56:48,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:56:48,610 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-12 00:56:48,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:48,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1781714871, now seen corresponding path program 1 times [2023-11-12 00:56:48,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:48,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395573603] [2023-11-12 00:56:48,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:48,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:56:48,646 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 00:56:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:56:48,667 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-12 00:56:48,667 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 00:56:48,668 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-12 00:56:48,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-11-12 00:56:48,668 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2023-11-12 00:56:48,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-11-12 00:56:48,671 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-11-12 00:56:48,671 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-11-12 00:56:48,672 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-11-12 00:56:48,672 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-11-12 00:56:48,672 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-11-12 00:56:48,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:56:48,673 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-12 00:56:48,674 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 00:56:48,675 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-12 00:56:48,733 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 00:56:48,742 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-12 00:56:48,743 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 239 places, 251 transitions, 530 flow [2023-11-12 00:56:48,743 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 239 places, 251 transitions, 530 flow [2023-11-12 00:56:48,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 251 transitions, 530 flow [2023-11-12 00:56:48,833 INFO L124 PetriNetUnfolderBase]: 25/301 cut-off events. [2023-11-12 00:56:48,833 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 00:56:48,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 301 events. 25/301 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1206 event pairs, 0 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 240. Up to 10 conditions per place. [2023-11-12 00:56:48,873 INFO L119 LiptonReduction]: Number of co-enabled transitions 43120