./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/14_spin2003.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_10778438-193b-47ba-9a9a-5198ab6789f9/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10778438-193b-47ba-9a9a-5198ab6789f9/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10778438-193b-47ba-9a9a-5198ab6789f9/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10778438-193b-47ba-9a9a-5198ab6789f9/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-ext/14_spin2003.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10778438-193b-47ba-9a9a-5198ab6789f9/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10778438-193b-47ba-9a9a-5198ab6789f9/bin/utaipan-verify-QoSU8krkJ5 --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 f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:00:31,379 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:00:31,456 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10778438-193b-47ba-9a9a-5198ab6789f9/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 19:00:31,463 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:00:31,468 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:00:31,511 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:00:31,511 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:00:31,512 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:00:31,513 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:00:31,518 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:00:31,519 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:00:31,519 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:00:31,519 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:00:31,521 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:00:31,522 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:00:31,522 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:00:31,523 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:00:31,523 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:00:31,523 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:00:31,524 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:00:31,524 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:00:31,525 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:00:31,526 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:00:31,527 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:00:31,527 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:00:31,527 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:00:31,528 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:00:31,528 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:00:31,529 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:00:31,529 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:00:31,530 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:00:31,531 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:00:31,531 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:00:31,531 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:00:31,531 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:00:31,532 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:00:31,532 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:00:31,532 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:00:31,533 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:00:31,533 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:00:31,533 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:00:31,533 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:00:31,534 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:00:31,534 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:00:31,535 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:00:31,535 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:00:31,535 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:00:31,535 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_10778438-193b-47ba-9a9a-5198ab6789f9/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10778438-193b-47ba-9a9a-5198ab6789f9/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e [2023-11-21 19:00:31,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:00:31,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:00:31,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:00:31,890 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:00:31,890 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:00:31,892 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10778438-193b-47ba-9a9a-5198ab6789f9/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/pthread-ext/14_spin2003.i [2023-11-21 19:00:35,384 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:00:35,661 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:00:35,662 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10778438-193b-47ba-9a9a-5198ab6789f9/sv-benchmarks/c/pthread-ext/14_spin2003.i [2023-11-21 19:00:35,682 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10778438-193b-47ba-9a9a-5198ab6789f9/bin/utaipan-verify-QoSU8krkJ5/data/400c1dc30/f3f0c1fece7744ca970bb5c615688bad/FLAGc38f7958e [2023-11-21 19:00:35,700 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10778438-193b-47ba-9a9a-5198ab6789f9/bin/utaipan-verify-QoSU8krkJ5/data/400c1dc30/f3f0c1fece7744ca970bb5c615688bad [2023-11-21 19:00:35,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:00:35,705 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:00:35,707 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:00:35,708 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:00:35,714 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:00:35,715 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:00:35" (1/1) ... [2023-11-21 19:00:35,716 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f3946a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:35, skipping insertion in model container [2023-11-21 19:00:35,717 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:00:35" (1/1) ... [2023-11-21 19:00:35,776 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:00:36,235 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_10778438-193b-47ba-9a9a-5198ab6789f9/sv-benchmarks/c/pthread-ext/14_spin2003.i[30203,30216] [2023-11-21 19:00:36,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:00:36,257 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:00:36,305 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_10778438-193b-47ba-9a9a-5198ab6789f9/sv-benchmarks/c/pthread-ext/14_spin2003.i[30203,30216] [2023-11-21 19:00:36,313 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:00:36,373 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:00:36,373 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:36 WrapperNode [2023-11-21 19:00:36,374 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:00:36,375 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:00:36,376 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:00:36,376 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:00:36,386 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:36" (1/1) ... [2023-11-21 19:00:36,425 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:36" (1/1) ... [2023-11-21 19:00:36,453 INFO L138 Inliner]: procedures = 169, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 46 [2023-11-21 19:00:36,453 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:00:36,454 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:00:36,454 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:00:36,455 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:00:36,465 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:36" (1/1) ... [2023-11-21 19:00:36,465 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:36" (1/1) ... [2023-11-21 19:00:36,471 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:36" (1/1) ... [2023-11-21 19:00:36,472 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:36" (1/1) ... [2023-11-21 19:00:36,479 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:36" (1/1) ... [2023-11-21 19:00:36,483 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:36" (1/1) ... [2023-11-21 19:00:36,491 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:36" (1/1) ... [2023-11-21 19:00:36,493 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:36" (1/1) ... [2023-11-21 19:00:36,496 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:00:36,497 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:00:36,497 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:00:36,497 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:00:36,498 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:36" (1/1) ... [2023-11-21 19:00:36,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:00:36,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10778438-193b-47ba-9a9a-5198ab6789f9/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:00:36,554 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10778438-193b-47ba-9a9a-5198ab6789f9/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:00:36,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10778438-193b-47ba-9a9a-5198ab6789f9/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:00:36,607 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-21 19:00:36,607 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-21 19:00:36,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:00:36,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:00:36,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:00:36,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:00:36,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:00:36,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:00:36,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:00:36,613 WARN L212 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 19:00:36,769 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:00:36,772 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:00:36,921 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:00:37,056 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:00:37,057 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 19:00:37,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:00:37 BoogieIcfgContainer [2023-11-21 19:00:37,059 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:00:37,061 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:00:37,062 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:00:37,065 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:00:37,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:00:35" (1/3) ... [2023-11-21 19:00:37,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2340109f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:00:37, skipping insertion in model container [2023-11-21 19:00:37,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:00:36" (2/3) ... [2023-11-21 19:00:37,068 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2340109f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:00:37, skipping insertion in model container [2023-11-21 19:00:37,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:00:37" (3/3) ... [2023-11-21 19:00:37,070 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2023-11-21 19:00:37,081 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-21 19:00:37,097 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:00:37,098 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:00:37,098 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 19:00:37,145 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 19:00:37,182 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 17 places, 15 transitions, 34 flow [2023-11-21 19:00:37,201 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 45 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 44 states have internal predecessors, (77), 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) [2023-11-21 19:00:37,220 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:00:37,227 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;@3d8b1d45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:00:37,228 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-21 19:00:37,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 44 states have internal predecessors, (77), 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) [2023-11-21 19:00:37,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-21 19:00:37,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:37,238 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-21 19:00:37,238 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:00:37,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:37,245 INFO L85 PathProgramCache]: Analyzing trace with hash 469336669, now seen corresponding path program 1 times [2023-11-21 19:00:37,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:37,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084568194] [2023-11-21 19:00:37,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:37,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:00:37,386 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 19:00:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:00:37,428 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-21 19:00:37,430 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 19:00:37,431 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-21 19:00:37,433 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-21 19:00:37,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-21 19:00:37,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:00:37,439 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-21 19:00:37,442 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 19:00:37,442 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-21 19:00:37,460 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 19:00:37,463 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 25 transitions, 60 flow [2023-11-21 19:00:37,537 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 432 states, 424 states have (on average 2.7570754716981134) internal successors, (1169), 431 states have internal predecessors, (1169), 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) [2023-11-21 19:00:37,539 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:00:37,541 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;@3d8b1d45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:00:37,541 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-21 19:00:37,544 INFO L276 IsEmpty]: Start isEmpty. Operand has 432 states, 424 states have (on average 2.7570754716981134) internal successors, (1169), 431 states have internal predecessors, (1169), 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) [2023-11-21 19:00:37,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 19:00:37,546 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:37,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:00:37,547 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-21 19:00:37,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:37,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1887281157, now seen corresponding path program 1 times [2023-11-21 19:00:37,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:37,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281664993] [2023-11-21 19:00:37,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:37,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:00:37,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:37,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281664993] [2023-11-21 19:00:37,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281664993] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:00:37,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:00:37,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:00:37,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146133159] [2023-11-21 19:00:37,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:00:37,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:00:37,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:37,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:00:37,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:00:37,738 INFO L87 Difference]: Start difference. First operand has 432 states, 424 states have (on average 2.7570754716981134) internal successors, (1169), 431 states have internal predecessors, (1169), 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, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-11-21 19:00:37,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:37,803 INFO L93 Difference]: Finished difference Result 220 states and 525 transitions. [2023-11-21 19:00:37,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:00:37,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2023-11-21 19:00:37,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:37,819 INFO L225 Difference]: With dead ends: 220 [2023-11-21 19:00:37,819 INFO L226 Difference]: Without dead ends: 220 [2023-11-21 19:00:37,820 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 [2023-11-21 19:00:37,824 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:37,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 3 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:00:37,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-21 19:00:37,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2023-11-21 19:00:37,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.3972602739726026) internal successors, (525), 219 states have internal predecessors, (525), 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) [2023-11-21 19:00:37,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 525 transitions. [2023-11-21 19:00:37,901 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 525 transitions. Word has length 8 [2023-11-21 19:00:37,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:37,901 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 525 transitions. [2023-11-21 19:00:37,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-11-21 19:00:37,902 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 525 transitions. [2023-11-21 19:00:37,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-21 19:00:37,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:37,903 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-21 19:00:37,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:00:37,904 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-21 19:00:37,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:37,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1124449936, now seen corresponding path program 1 times [2023-11-21 19:00:37,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:37,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803100026] [2023-11-21 19:00:37,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:37,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:00:37,938 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 19:00:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:00:37,972 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-21 19:00:37,976 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 19:00:37,977 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-21 19:00:37,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-21 19:00:37,979 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-21 19:00:37,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-21 19:00:37,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:00:37,982 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-21 19:00:37,983 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 19:00:37,984 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-21 19:00:38,017 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 19:00:38,031 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 35 transitions, 88 flow [2023-11-21 19:00:38,255 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3969 states, 3950 states have (on average 3.727341772151899) internal successors, (14723), 3968 states have internal predecessors, (14723), 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) [2023-11-21 19:00:38,259 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:00:38,266 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;@3d8b1d45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:00:38,266 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-21 19:00:38,283 INFO L276 IsEmpty]: Start isEmpty. Operand has 3969 states, 3950 states have (on average 3.727341772151899) internal successors, (14723), 3968 states have internal predecessors, (14723), 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) [2023-11-21 19:00:38,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 19:00:38,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:38,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:00:38,289 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-21 19:00:38,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:38,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1272479506, now seen corresponding path program 1 times [2023-11-21 19:00:38,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:38,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790186425] [2023-11-21 19:00:38,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:38,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:38,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:00:38,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:38,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790186425] [2023-11-21 19:00:38,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790186425] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:00:38,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:00:38,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:00:38,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270314669] [2023-11-21 19:00:38,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:00:38,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:00:38,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:38,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:00:38,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:00:38,416 INFO L87 Difference]: Start difference. First operand has 3969 states, 3950 states have (on average 3.727341772151899) internal successors, (14723), 3968 states have internal predecessors, (14723), 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, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-11-21 19:00:38,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:38,490 INFO L93 Difference]: Finished difference Result 1543 states and 4998 transitions. [2023-11-21 19:00:38,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:00:38,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2023-11-21 19:00:38,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:38,517 INFO L225 Difference]: With dead ends: 1543 [2023-11-21 19:00:38,517 INFO L226 Difference]: Without dead ends: 1543 [2023-11-21 19:00:38,517 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 [2023-11-21 19:00:38,518 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:38,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 4 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:00:38,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2023-11-21 19:00:38,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1543. [2023-11-21 19:00:38,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1543 states, 1542 states have (on average 3.2412451361867705) internal successors, (4998), 1542 states have internal predecessors, (4998), 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) [2023-11-21 19:00:38,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 4998 transitions. [2023-11-21 19:00:38,666 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 4998 transitions. Word has length 8 [2023-11-21 19:00:38,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:38,667 INFO L495 AbstractCegarLoop]: Abstraction has 1543 states and 4998 transitions. [2023-11-21 19:00:38,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-11-21 19:00:38,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 4998 transitions. [2023-11-21 19:00:38,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-21 19:00:38,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:38,672 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-21 19:00:38,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 19:00:38,673 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-21 19:00:38,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:38,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1390542948, now seen corresponding path program 1 times [2023-11-21 19:00:38,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:38,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342852221] [2023-11-21 19:00:38,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:38,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:00:38,727 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 19:00:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:00:38,764 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-21 19:00:38,764 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 19:00:38,766 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-21 19:00:38,766 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-21 19:00:38,766 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-21 19:00:38,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-21 19:00:38,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-21 19:00:38,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 19:00:38,770 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-21 19:00:38,771 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 19:00:38,771 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-21 19:00:38,818 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 19:00:38,823 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 50 places, 45 transitions, 118 flow [2023-11-21 19:00:41,195 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35964 states, 35922 states have (on average 4.718194978007906) internal successors, (169487), 35963 states have internal predecessors, (169487), 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) [2023-11-21 19:00:41,200 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:00:41,206 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3d8b1d45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:00:41,207 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-21 19:00:41,291 INFO L276 IsEmpty]: Start isEmpty. Operand has 35964 states, 35922 states have (on average 4.718194978007906) internal successors, (169487), 35963 states have internal predecessors, (169487), 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) [2023-11-21 19:00:41,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 19:00:41,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:41,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:00:41,299 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-21 19:00:41,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:41,300 INFO L85 PathProgramCache]: Analyzing trace with hash 975032562, now seen corresponding path program 1 times [2023-11-21 19:00:41,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:41,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622343707] [2023-11-21 19:00:41,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:41,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:00:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:00:41,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:00:41,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622343707] [2023-11-21 19:00:41,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622343707] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:00:41,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:00:41,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:00:41,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411847859] [2023-11-21 19:00:41,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:00:41,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:00:41,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:00:41,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:00:41,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:00:41,665 INFO L87 Difference]: Start difference. First operand has 35964 states, 35922 states have (on average 4.718194978007906) internal successors, (169487), 35963 states have internal predecessors, (169487), 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, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-11-21 19:00:42,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:00:42,140 INFO L93 Difference]: Finished difference Result 10804 states and 44247 transitions. [2023-11-21 19:00:42,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:00:42,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2023-11-21 19:00:42,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:00:42,415 INFO L225 Difference]: With dead ends: 10804 [2023-11-21 19:00:42,421 INFO L226 Difference]: Without dead ends: 10804 [2023-11-21 19:00:42,422 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 [2023-11-21 19:00:42,423 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:00:42,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 5 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:00:42,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10804 states. [2023-11-21 19:00:43,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10804 to 10804. [2023-11-21 19:00:43,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10804 states, 10803 states have (on average 4.095806720355457) internal successors, (44247), 10803 states have internal predecessors, (44247), 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) [2023-11-21 19:00:43,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10804 states to 10804 states and 44247 transitions. [2023-11-21 19:00:43,231 INFO L78 Accepts]: Start accepts. Automaton has 10804 states and 44247 transitions. Word has length 8 [2023-11-21 19:00:43,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:00:43,231 INFO L495 AbstractCegarLoop]: Abstraction has 10804 states and 44247 transitions. [2023-11-21 19:00:43,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-11-21 19:00:43,232 INFO L276 IsEmpty]: Start isEmpty. Operand 10804 states and 44247 transitions. [2023-11-21 19:00:43,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 19:00:43,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:00:43,235 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-11-21 19:00:43,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 19:00:43,236 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-21 19:00:43,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:00:43,237 INFO L85 PathProgramCache]: Analyzing trace with hash 2107663441, now seen corresponding path program 1 times [2023-11-21 19:00:43,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:00:43,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546100935] [2023-11-21 19:00:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:00:43,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:00:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:00:43,259 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 19:00:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:00:43,277 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-21 19:00:43,278 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 19:00:43,278 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-21 19:00:43,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-21 19:00:43,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-21 19:00:43,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-21 19:00:43,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-21 19:00:43,280 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-21 19:00:43,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 19:00:43,280 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-21 19:00:43,281 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 19:00:43,281 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-21 19:00:43,488 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 19:00:43,494 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 55 transitions, 150 flow [2023-11-21 19:01:00,540 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 324405 states, 324316 states have (on average 5.716033128183623) internal successors, (1853801), 324404 states have internal predecessors, (1853801), 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) [2023-11-21 19:01:00,541 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:01:00,543 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;@3d8b1d45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:01:00,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-21 19:01:01,058 INFO L276 IsEmpty]: Start isEmpty. Operand has 324405 states, 324316 states have (on average 5.716033128183623) internal successors, (1853801), 324404 states have internal predecessors, (1853801), 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) [2023-11-21 19:01:01,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 19:01:01,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:01:01,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:01:01,060 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-21 19:01:01,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:01:01,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1489579072, now seen corresponding path program 1 times [2023-11-21 19:01:01,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:01:01,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134410937] [2023-11-21 19:01:01,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:01:01,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:01:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:01:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:01:01,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:01:01,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134410937] [2023-11-21 19:01:01,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134410937] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:01:01,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:01:01,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:01:01,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771105740] [2023-11-21 19:01:01,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:01:01,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:01:01,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:01:01,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:01:01,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:01:02,573 INFO L87 Difference]: Start difference. First operand has 324405 states, 324316 states have (on average 5.716033128183623) internal successors, (1853801), 324404 states have internal predecessors, (1853801), 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, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-11-21 19:01:04,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:01:04,414 INFO L93 Difference]: Finished difference Result 75631 states and 374556 transitions. [2023-11-21 19:01:04,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:01:04,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2023-11-21 19:01:04,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:01:05,778 INFO L225 Difference]: With dead ends: 75631 [2023-11-21 19:01:05,778 INFO L226 Difference]: Without dead ends: 75631 [2023-11-21 19:01:05,779 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 [2023-11-21 19:01:05,780 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:01:05,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 6 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:01:06,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75631 states. [2023-11-21 19:01:09,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75631 to 75631. [2023-11-21 19:01:09,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75631 states, 75630 states have (on average 4.952479174930583) internal successors, (374556), 75630 states have internal predecessors, (374556), 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) [2023-11-21 19:01:10,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75631 states to 75631 states and 374556 transitions. [2023-11-21 19:01:10,589 INFO L78 Accepts]: Start accepts. Automaton has 75631 states and 374556 transitions. Word has length 8 [2023-11-21 19:01:10,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:01:10,589 INFO L495 AbstractCegarLoop]: Abstraction has 75631 states and 374556 transitions. [2023-11-21 19:01:10,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2023-11-21 19:01:10,589 INFO L276 IsEmpty]: Start isEmpty. Operand 75631 states and 374556 transitions. [2023-11-21 19:01:10,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-21 19:01:10,597 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:01:10,597 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:01:10,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 19:01:10,598 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-21 19:01:10,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:01:10,598 INFO L85 PathProgramCache]: Analyzing trace with hash 858081371, now seen corresponding path program 1 times [2023-11-21 19:01:10,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:01:10,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044783318] [2023-11-21 19:01:10,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:01:10,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:01:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:01:10,635 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 19:01:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:01:10,661 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-21 19:01:10,662 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 19:01:10,663 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-21 19:01:10,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-21 19:01:10,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-21 19:01:10,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-21 19:01:10,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-21 19:01:10,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-21 19:01:10,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-21 19:01:10,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 19:01:10,666 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-21 19:01:10,666 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 19:01:10,666 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-21 19:01:10,698 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 19:01:10,704 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 72 places, 65 transitions, 184 flow