./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/29_conditionals_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_0c37897f-3450-45be-983c-3ff70b471e72/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c37897f-3450-45be-983c-3ff70b471e72/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c37897f-3450-45be-983c-3ff70b471e72/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c37897f-3450-45be-983c-3ff70b471e72/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/29_conditionals_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c37897f-3450-45be-983c-3ff70b471e72/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c37897f-3450-45be-983c-3ff70b471e72/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c3f647420f42d7fdb333957b618cdd528a4c5a4cecdb35105a1a2630df70b3d6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:11:52,395 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:11:52,490 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c37897f-3450-45be-983c-3ff70b471e72/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:11:52,496 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:11:52,497 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:11:52,526 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:11:52,527 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:11:52,528 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:11:52,529 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:11:52,529 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:11:52,530 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:11:52,531 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:11:52,532 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:11:52,532 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:11:52,533 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:11:52,534 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:11:52,534 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:11:52,535 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:11:52,536 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:11:52,536 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:11:52,537 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:11:52,543 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:11:52,543 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:11:52,544 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:11:52,545 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:11:52,545 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:11:52,546 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:11:52,546 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:11:52,547 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:11:52,547 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:11:52,548 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:11:52,548 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:11:52,549 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:11:52,549 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:11:52,550 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:11:52,550 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:11:52,551 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:11:52,551 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:11:52,552 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:11:52,552 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_0c37897f-3450-45be-983c-3ff70b471e72/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c37897f-3450-45be-983c-3ff70b471e72/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3f647420f42d7fdb333957b618cdd528a4c5a4cecdb35105a1a2630df70b3d6 [2023-11-06 22:11:52,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:11:52,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:11:52,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:11:52,835 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:11:52,836 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:11:52,838 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c37897f-3450-45be-983c-3ff70b471e72/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread-ext/29_conditionals_vs.i [2023-11-06 22:11:56,110 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:11:56,404 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:11:56,405 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c37897f-3450-45be-983c-3ff70b471e72/sv-benchmarks/c/pthread-ext/29_conditionals_vs.i [2023-11-06 22:11:56,425 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c37897f-3450-45be-983c-3ff70b471e72/bin/uautomizer-verify-WvqO1wxjHP/data/44555edb4/9943557bcc90472288118f296cfccd3a/FLAG0e72a8b55 [2023-11-06 22:11:56,445 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c37897f-3450-45be-983c-3ff70b471e72/bin/uautomizer-verify-WvqO1wxjHP/data/44555edb4/9943557bcc90472288118f296cfccd3a [2023-11-06 22:11:56,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:11:56,451 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:11:56,453 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:11:56,453 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:11:56,459 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:11:56,459 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:11:56" (1/1) ... [2023-11-06 22:11:56,461 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@803882a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:56, skipping insertion in model container [2023-11-06 22:11:56,461 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:11:56" (1/1) ... [2023-11-06 22:11:56,509 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:11:56,844 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_0c37897f-3450-45be-983c-3ff70b471e72/sv-benchmarks/c/pthread-ext/29_conditionals_vs.i[30422,30435] [2023-11-06 22:11:56,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:11:56,865 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:11:56,910 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_0c37897f-3450-45be-983c-3ff70b471e72/sv-benchmarks/c/pthread-ext/29_conditionals_vs.i[30422,30435] [2023-11-06 22:11:56,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:11:56,967 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:11:56,967 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:56 WrapperNode [2023-11-06 22:11:56,967 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:11:56,969 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:11:56,969 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:11:56,969 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:11:57,008 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:56" (1/1) ... [2023-11-06 22:11:57,049 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:56" (1/1) ... [2023-11-06 22:11:57,102 INFO L138 Inliner]: procedures = 170, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 60 [2023-11-06 22:11:57,102 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:11:57,103 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:11:57,103 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:11:57,104 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:11:57,125 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:56" (1/1) ... [2023-11-06 22:11:57,126 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:56" (1/1) ... [2023-11-06 22:11:57,139 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:56" (1/1) ... [2023-11-06 22:11:57,140 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:56" (1/1) ... [2023-11-06 22:11:57,151 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:56" (1/1) ... [2023-11-06 22:11:57,161 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:56" (1/1) ... [2023-11-06 22:11:57,163 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:56" (1/1) ... [2023-11-06 22:11:57,167 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:56" (1/1) ... [2023-11-06 22:11:57,170 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:11:57,182 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:11:57,183 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:11:57,183 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:11:57,184 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:56" (1/1) ... [2023-11-06 22:11:57,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:11:57,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c37897f-3450-45be-983c-3ff70b471e72/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:57,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c37897f-3450-45be-983c-3ff70b471e72/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:11:57,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c37897f-3450-45be-983c-3ff70b471e72/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:11:57,271 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-06 22:11:57,272 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-06 22:11:57,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:11:57,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:11:57,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:11:57,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:11:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:11:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:11:57,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:11:57,276 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:11:57,446 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:11:57,448 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:11:57,655 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:11:57,730 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:11:57,730 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:11:57,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:11:57 BoogieIcfgContainer [2023-11-06 22:11:57,733 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:11:57,736 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:11:57,736 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:11:57,740 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:11:57,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:11:56" (1/3) ... [2023-11-06 22:11:57,741 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@daac430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:11:57, skipping insertion in model container [2023-11-06 22:11:57,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:11:56" (2/3) ... [2023-11-06 22:11:57,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@daac430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:11:57, skipping insertion in model container [2023-11-06 22:11:57,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:11:57" (3/3) ... [2023-11-06 22:11:57,744 INFO L112 eAbstractionObserver]: Analyzing ICFG 29_conditionals_vs.i [2023-11-06 22:11:57,755 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:11:57,769 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:11:57,769 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:11:57,769 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:11:57,821 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:11:57,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 112 flow [2023-11-06 22:11:57,924 INFO L124 PetriNetUnfolderBase]: 6/65 cut-off events. [2023-11-06 22:11:57,929 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:11:57,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 65 events. 6/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 42. Up to 4 conditions per place. [2023-11-06 22:11:57,938 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 54 transitions, 112 flow [2023-11-06 22:11:57,945 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 54 transitions, 112 flow [2023-11-06 22:11:57,951 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:11:57,969 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 52 places, 54 transitions, 112 flow [2023-11-06 22:11:57,978 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 52 places, 54 transitions, 112 flow [2023-11-06 22:11:57,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 112 flow [2023-11-06 22:11:58,020 INFO L124 PetriNetUnfolderBase]: 6/65 cut-off events. [2023-11-06 22:11:58,021 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:11:58,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 65 events. 6/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 42. Up to 4 conditions per place. [2023-11-06 22:11:58,023 INFO L119 LiptonReduction]: Number of co-enabled transitions 812 [2023-11-06 22:12:00,430 INFO L134 LiptonReduction]: Checked pairs total: 687 [2023-11-06 22:12:00,430 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-11-06 22:12:00,447 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:12:00,454 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@7fa07510, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:12:00,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:12:00,458 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:12:00,459 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-06 22:12:00,459 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:12:00,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:00,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:12:00,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:12:00,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:00,467 INFO L85 PathProgramCache]: Analyzing trace with hash 8853676, now seen corresponding path program 1 times [2023-11-06 22:12:00,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:00,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983746357] [2023-11-06 22:12:00,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:00,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:00,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:00,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983746357] [2023-11-06 22:12:00,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983746357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:00,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:12:00,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:12:00,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954512251] [2023-11-06 22:12:00,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:00,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:12:00,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:00,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:12:00,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:12:00,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 112 [2023-11-06 22:12:00,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 20 flow. Second operand has 2 states, 2 states have (on average 49.0) internal successors, (98), 2 states have internal predecessors, (98), 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) [2023-11-06 22:12:00,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:00,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 112 [2023-11-06 22:12:00,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:00,755 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-11-06 22:12:00,755 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:12:00,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 12 events. 2/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 2 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-11-06 22:12:00,757 INFO L140 encePairwiseOnDemand]: 110/112 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-11-06 22:12:00,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 26 flow [2023-11-06 22:12:00,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:12:00,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:12:00,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 101 transitions. [2023-11-06 22:12:00,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45089285714285715 [2023-11-06 22:12:00,776 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 101 transitions. [2023-11-06 22:12:00,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 101 transitions. [2023-11-06 22:12:00,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:00,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 101 transitions. [2023-11-06 22:12:00,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 50.5) internal successors, (101), 2 states have internal predecessors, (101), 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) [2023-11-06 22:12:00,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 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) [2023-11-06 22:12:00,799 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 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) [2023-11-06 22:12:00,801 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 20 flow. Second operand 2 states and 101 transitions. [2023-11-06 22:12:00,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 26 flow [2023-11-06 22:12:00,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 26 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:12:00,806 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 16 flow [2023-11-06 22:12:00,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=16, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-11-06 22:12:00,815 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-11-06 22:12:00,815 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 16 flow [2023-11-06 22:12:00,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 49.0) internal successors, (98), 2 states have internal predecessors, (98), 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) [2023-11-06 22:12:00,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:00,816 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 22:12:00,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:12:00,818 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:12:00,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:00,829 INFO L85 PathProgramCache]: Analyzing trace with hash -81584454, now seen corresponding path program 1 times [2023-11-06 22:12:00,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:00,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742094880] [2023-11-06 22:12:00,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:00,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:12:00,859 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:12:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:12:00,897 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:12:00,897 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:12:00,899 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-06 22:12:00,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-06 22:12:00,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-06 22:12:00,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:12:00,903 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:12:00,907 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:12:00,907 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:12:00,933 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:12:00,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 84 transitions, 178 flow [2023-11-06 22:12:00,963 INFO L124 PetriNetUnfolderBase]: 11/108 cut-off events. [2023-11-06 22:12:00,963 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:12:00,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 108 events. 11/108 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 186 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 71. Up to 6 conditions per place. [2023-11-06 22:12:00,966 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 84 transitions, 178 flow [2023-11-06 22:12:00,968 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 84 transitions, 178 flow [2023-11-06 22:12:00,968 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:12:00,968 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 84 transitions, 178 flow [2023-11-06 22:12:00,969 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 84 transitions, 178 flow [2023-11-06 22:12:00,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 84 transitions, 178 flow [2023-11-06 22:12:00,994 INFO L124 PetriNetUnfolderBase]: 11/108 cut-off events. [2023-11-06 22:12:00,995 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:12:00,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 108 events. 11/108 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 186 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 71. Up to 6 conditions per place. [2023-11-06 22:12:01,000 INFO L119 LiptonReduction]: Number of co-enabled transitions 3364 [2023-11-06 22:12:03,983 INFO L134 LiptonReduction]: Checked pairs total: 2937 [2023-11-06 22:12:03,983 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-11-06 22:12:03,986 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:12:03,987 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@7fa07510, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:12:03,988 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 22:12:03,990 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:12:03,990 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-06 22:12:03,990 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:12:03,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:03,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:12:03,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-06 22:12:03,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:03,992 INFO L85 PathProgramCache]: Analyzing trace with hash 15032643, now seen corresponding path program 1 times [2023-11-06 22:12:03,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:03,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461080413] [2023-11-06 22:12:03,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:03,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:04,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:04,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461080413] [2023-11-06 22:12:04,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461080413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:04,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:12:04,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:12:04,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546193836] [2023-11-06 22:12:04,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:04,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:12:04,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:04,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:12:04,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:12:04,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 169 [2023-11-06 22:12:04,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 38 flow. Second operand has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 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) [2023-11-06 22:12:04,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:04,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 169 [2023-11-06 22:12:04,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:04,056 INFO L124 PetriNetUnfolderBase]: 20/57 cut-off events. [2023-11-06 22:12:04,056 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-06 22:12:04,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 57 events. 20/57 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 163 event pairs, 20 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 28. Up to 47 conditions per place. [2023-11-06 22:12:04,057 INFO L140 encePairwiseOnDemand]: 166/169 looper letters, 8 selfloop transitions, 0 changer transitions 0/11 dead transitions. [2023-11-06 22:12:04,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 11 transitions, 48 flow [2023-11-06 22:12:04,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:12:04,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:12:04,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 155 transitions. [2023-11-06 22:12:04,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45857988165680474 [2023-11-06 22:12:04,061 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 155 transitions. [2023-11-06 22:12:04,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 155 transitions. [2023-11-06 22:12:04,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:04,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 155 transitions. [2023-11-06 22:12:04,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 77.5) internal successors, (155), 2 states have internal predecessors, (155), 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) [2023-11-06 22:12:04,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 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) [2023-11-06 22:12:04,065 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 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) [2023-11-06 22:12:04,066 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 38 flow. Second operand 2 states and 155 transitions. [2023-11-06 22:12:04,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 11 transitions, 48 flow [2023-11-06 22:12:04,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 11 transitions, 48 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:12:04,067 INFO L231 Difference]: Finished difference. Result has 17 places, 11 transitions, 32 flow [2023-11-06 22:12:04,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=32, PETRI_PLACES=17, PETRI_TRANSITIONS=11} [2023-11-06 22:12:04,068 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -2 predicate places. [2023-11-06 22:12:04,069 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 11 transitions, 32 flow [2023-11-06 22:12:04,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 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) [2023-11-06 22:12:04,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:04,069 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 22:12:04,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:12:04,070 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)] === [2023-11-06 22:12:04,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:04,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1873474311, now seen corresponding path program 1 times [2023-11-06 22:12:04,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:04,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809677642] [2023-11-06 22:12:04,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:04,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:12:04,106 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:12:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:12:04,141 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:12:04,145 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:12:04,146 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-06 22:12:04,146 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-06 22:12:04,146 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-06 22:12:04,147 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-06 22:12:04,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:12:04,147 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:12:04,148 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:12:04,148 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 22:12:04,185 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:12:04,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 114 transitions, 246 flow [2023-11-06 22:12:04,220 INFO L124 PetriNetUnfolderBase]: 16/151 cut-off events. [2023-11-06 22:12:04,220 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:12:04,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 151 events. 16/151 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 346 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 112. Up to 8 conditions per place. [2023-11-06 22:12:04,223 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 114 transitions, 246 flow [2023-11-06 22:12:04,225 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 114 transitions, 246 flow [2023-11-06 22:12:04,225 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:12:04,225 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 114 transitions, 246 flow [2023-11-06 22:12:04,226 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 114 transitions, 246 flow [2023-11-06 22:12:04,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 114 transitions, 246 flow [2023-11-06 22:12:04,276 INFO L124 PetriNetUnfolderBase]: 16/151 cut-off events. [2023-11-06 22:12:04,276 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:12:04,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 151 events. 16/151 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 346 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 112. Up to 8 conditions per place. [2023-11-06 22:12:04,285 INFO L119 LiptonReduction]: Number of co-enabled transitions 7656 [2023-11-06 22:12:08,163 INFO L134 LiptonReduction]: Checked pairs total: 7330 [2023-11-06 22:12:08,163 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-11-06 22:12:08,166 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:12:08,167 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@7fa07510, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:12:08,167 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 22:12:08,173 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:12:08,173 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-06 22:12:08,174 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:12:08,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:08,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:12:08,174 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:12:08,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:08,175 INFO L85 PathProgramCache]: Analyzing trace with hash 23142171, now seen corresponding path program 1 times [2023-11-06 22:12:08,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:08,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493259054] [2023-11-06 22:12:08,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:08,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:08,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:08,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:08,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493259054] [2023-11-06 22:12:08,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493259054] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:08,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:12:08,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:12:08,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729497598] [2023-11-06 22:12:08,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:08,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:12:08,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:08,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:12:08,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:12:08,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 239 [2023-11-06 22:12:08,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 20 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 99.0) internal successors, (198), 2 states have internal predecessors, (198), 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) [2023-11-06 22:12:08,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:08,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 239 [2023-11-06 22:12:08,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:08,356 INFO L124 PetriNetUnfolderBase]: 110/225 cut-off events. [2023-11-06 22:12:08,357 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-11-06 22:12:08,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 225 events. 110/225 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 898 event pairs, 110 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 118. Up to 191 conditions per place. [2023-11-06 22:12:08,367 INFO L140 encePairwiseOnDemand]: 234/239 looper letters, 11 selfloop transitions, 0 changer transitions 0/14 dead transitions. [2023-11-06 22:12:08,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 14 transitions, 68 flow [2023-11-06 22:12:08,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:12:08,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:12:08,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 210 transitions. [2023-11-06 22:12:08,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393305439330544 [2023-11-06 22:12:08,374 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 210 transitions. [2023-11-06 22:12:08,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 210 transitions. [2023-11-06 22:12:08,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:08,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 210 transitions. [2023-11-06 22:12:08,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 105.0) internal successors, (210), 2 states have internal predecessors, (210), 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) [2023-11-06 22:12:08,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 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) [2023-11-06 22:12:08,383 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 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) [2023-11-06 22:12:08,383 INFO L175 Difference]: Start difference. First operand has 26 places, 20 transitions, 58 flow. Second operand 2 states and 210 transitions. [2023-11-06 22:12:08,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 14 transitions, 68 flow [2023-11-06 22:12:08,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 14 transitions, 66 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-06 22:12:08,392 INFO L231 Difference]: Finished difference. Result has 22 places, 14 transitions, 44 flow [2023-11-06 22:12:08,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=44, PETRI_PLACES=22, PETRI_TRANSITIONS=14} [2023-11-06 22:12:08,394 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -4 predicate places. [2023-11-06 22:12:08,396 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 14 transitions, 44 flow [2023-11-06 22:12:08,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 99.0) internal successors, (198), 2 states have internal predecessors, (198), 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) [2023-11-06 22:12:08,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:08,397 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-06 22:12:08,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:12:08,398 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)] === [2023-11-06 22:12:08,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:08,402 INFO L85 PathProgramCache]: Analyzing trace with hash -98951086, now seen corresponding path program 1 times [2023-11-06 22:12:08,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:08,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433504632] [2023-11-06 22:12:08,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:08,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:12:08,458 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:12:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:12:08,494 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:12:08,498 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:12:08,499 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-06 22:12:08,499 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-06 22:12:08,499 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-06 22:12:08,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-06 22:12:08,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-06 22:12:08,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:12:08,501 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:12:08,502 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:12:08,502 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-06 22:12:08,549 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:12:08,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 144 transitions, 316 flow [2023-11-06 22:12:08,612 INFO L124 PetriNetUnfolderBase]: 21/194 cut-off events. [2023-11-06 22:12:08,612 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-06 22:12:08,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 194 events. 21/194 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 504 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 159. Up to 10 conditions per place. [2023-11-06 22:12:08,615 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 144 transitions, 316 flow [2023-11-06 22:12:08,619 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 144 transitions, 316 flow [2023-11-06 22:12:08,619 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:12:08,619 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 144 transitions, 316 flow [2023-11-06 22:12:08,620 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 144 transitions, 316 flow [2023-11-06 22:12:08,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 144 transitions, 316 flow [2023-11-06 22:12:08,660 INFO L124 PetriNetUnfolderBase]: 21/194 cut-off events. [2023-11-06 22:12:08,660 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-06 22:12:08,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 194 events. 21/194 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 504 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 159. Up to 10 conditions per place. [2023-11-06 22:12:08,676 INFO L119 LiptonReduction]: Number of co-enabled transitions 13688 [2023-11-06 22:12:13,467 INFO L134 LiptonReduction]: Checked pairs total: 13008 [2023-11-06 22:12:13,467 INFO L136 LiptonReduction]: Total number of compositions: 156 [2023-11-06 22:12:13,469 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:12:13,470 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@7fa07510, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:12:13,470 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-06 22:12:13,472 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:12:13,472 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-06 22:12:13,472 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:12:13,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:13,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:12:13,473 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-06 22:12:13,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:13,473 INFO L85 PathProgramCache]: Analyzing trace with hash 33233585, now seen corresponding path program 1 times [2023-11-06 22:12:13,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:13,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483925144] [2023-11-06 22:12:13,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:13,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:13,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:13,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483925144] [2023-11-06 22:12:13,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483925144] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:13,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:12:13,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:12:13,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261565187] [2023-11-06 22:12:13,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:13,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:12:13,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:13,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:12:13,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:12:13,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 300 [2023-11-06 22:12:13,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 76 flow. Second operand has 2 states, 2 states have (on average 124.0) internal successors, (248), 2 states have internal predecessors, (248), 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) [2023-11-06 22:12:13,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:13,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 300 [2023-11-06 22:12:13,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:13,655 INFO L124 PetriNetUnfolderBase]: 488/837 cut-off events. [2023-11-06 22:12:13,656 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2023-11-06 22:12:13,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1755 conditions, 837 events. 488/837 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3901 event pairs, 488 based on Foata normal form. 0/797 useless extension candidates. Maximal degree in co-relation 475. Up to 731 conditions per place. [2023-11-06 22:12:13,663 INFO L140 encePairwiseOnDemand]: 294/300 looper letters, 14 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-11-06 22:12:13,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 17 transitions, 90 flow [2023-11-06 22:12:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:12:13,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:12:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 264 transitions. [2023-11-06 22:12:13,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2023-11-06 22:12:13,667 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 264 transitions. [2023-11-06 22:12:13,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 264 transitions. [2023-11-06 22:12:13,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:13,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 264 transitions. [2023-11-06 22:12:13,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 132.0) internal successors, (264), 2 states have internal predecessors, (264), 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) [2023-11-06 22:12:13,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 300.0) internal successors, (900), 3 states have internal predecessors, (900), 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) [2023-11-06 22:12:13,673 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 300.0) internal successors, (900), 3 states have internal predecessors, (900), 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) [2023-11-06 22:12:13,673 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 76 flow. Second operand 2 states and 264 transitions. [2023-11-06 22:12:13,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 17 transitions, 90 flow [2023-11-06 22:12:13,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 17 transitions, 84 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-06 22:12:13,676 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 56 flow [2023-11-06 22:12:13,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=300, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=56, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-11-06 22:12:13,677 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-11-06 22:12:13,677 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 56 flow [2023-11-06 22:12:13,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 124.0) internal successors, (248), 2 states have internal predecessors, (248), 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) [2023-11-06 22:12:13,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:13,678 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:13,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:12:13,678 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)] === [2023-11-06 22:12:13,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:13,679 INFO L85 PathProgramCache]: Analyzing trace with hash -220317286, now seen corresponding path program 1 times [2023-11-06 22:12:13,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:13,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136792262] [2023-11-06 22:12:13,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:13,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:12:13,723 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:12:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:12:13,756 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:12:13,764 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:12:13,764 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-06 22:12:13,765 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-06 22:12:13,765 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-06 22:12:13,765 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-06 22:12:13,765 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-06 22:12:13,766 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-06 22:12:13,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:12:13,766 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:12:13,767 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:12:13,767 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-06 22:12:13,793 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:12:13,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 174 transitions, 388 flow [2023-11-06 22:12:13,832 INFO L124 PetriNetUnfolderBase]: 26/237 cut-off events. [2023-11-06 22:12:13,832 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-06 22:12:13,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 237 events. 26/237 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 660 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 207. Up to 12 conditions per place. [2023-11-06 22:12:13,836 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 174 transitions, 388 flow [2023-11-06 22:12:13,839 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 174 transitions, 388 flow [2023-11-06 22:12:13,840 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:12:13,840 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 174 transitions, 388 flow [2023-11-06 22:12:13,840 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 174 transitions, 388 flow [2023-11-06 22:12:13,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 174 transitions, 388 flow [2023-11-06 22:12:13,878 INFO L124 PetriNetUnfolderBase]: 26/237 cut-off events. [2023-11-06 22:12:13,878 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-06 22:12:13,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 237 events. 26/237 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 660 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 207. Up to 12 conditions per place. [2023-11-06 22:12:13,901 INFO L119 LiptonReduction]: Number of co-enabled transitions 21460 [2023-11-06 22:12:20,110 INFO L134 LiptonReduction]: Checked pairs total: 20991 [2023-11-06 22:12:20,110 INFO L136 LiptonReduction]: Total number of compositions: 193 [2023-11-06 22:12:20,112 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:12:20,113 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@7fa07510, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:12:20,113 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-06 22:12:20,115 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:12:20,115 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-06 22:12:20,115 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:12:20,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:20,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:12:20,115 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-06 22:12:20,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:20,118 INFO L85 PathProgramCache]: Analyzing trace with hash 45222057, now seen corresponding path program 1 times [2023-11-06 22:12:20,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:20,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316004578] [2023-11-06 22:12:20,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:20,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:20,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:20,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:20,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:20,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316004578] [2023-11-06 22:12:20,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316004578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:20,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:12:20,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:12:20,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854096100] [2023-11-06 22:12:20,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:20,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:12:20,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:20,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:12:20,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:12:20,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 367 [2023-11-06 22:12:20,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 92 flow. Second operand has 2 states, 2 states have (on average 149.0) internal successors, (298), 2 states have internal predecessors, (298), 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) [2023-11-06 22:12:20,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:20,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 367 [2023-11-06 22:12:20,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:20,776 INFO L124 PetriNetUnfolderBase]: 1946/2997 cut-off events. [2023-11-06 22:12:20,776 INFO L125 PetriNetUnfolderBase]: For 2176/2176 co-relation queries the response was YES. [2023-11-06 22:12:20,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6346 conditions, 2997 events. 1946/2997 cut-off events. For 2176/2176 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15433 event pairs, 1946 based on Foata normal form. 0/2876 useless extension candidates. Maximal degree in co-relation 1789. Up to 2675 conditions per place. [2023-11-06 22:12:20,810 INFO L140 encePairwiseOnDemand]: 361/367 looper letters, 17 selfloop transitions, 0 changer transitions 0/20 dead transitions. [2023-11-06 22:12:20,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 20 transitions, 114 flow [2023-11-06 22:12:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:12:20,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:12:20,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 317 transitions. [2023-11-06 22:12:20,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318801089918256 [2023-11-06 22:12:20,813 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 317 transitions. [2023-11-06 22:12:20,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 317 transitions. [2023-11-06 22:12:20,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:20,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 317 transitions. [2023-11-06 22:12:20,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 158.5) internal successors, (317), 2 states have internal predecessors, (317), 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) [2023-11-06 22:12:20,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 367.0) internal successors, (1101), 3 states have internal predecessors, (1101), 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) [2023-11-06 22:12:20,822 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 367.0) internal successors, (1101), 3 states have internal predecessors, (1101), 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) [2023-11-06 22:12:20,822 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 92 flow. Second operand 2 states and 317 transitions. [2023-11-06 22:12:20,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 20 transitions, 114 flow [2023-11-06 22:12:20,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 20 transitions, 102 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-06 22:12:20,830 INFO L231 Difference]: Finished difference. Result has 32 places, 20 transitions, 68 flow [2023-11-06 22:12:20,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=68, PETRI_PLACES=32, PETRI_TRANSITIONS=20} [2023-11-06 22:12:20,833 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -5 predicate places. [2023-11-06 22:12:20,834 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 20 transitions, 68 flow [2023-11-06 22:12:20,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 149.0) internal successors, (298), 2 states have internal predecessors, (298), 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) [2023-11-06 22:12:20,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:20,835 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:20,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:12:20,835 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)] === [2023-11-06 22:12:20,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:20,836 INFO L85 PathProgramCache]: Analyzing trace with hash -90127407, now seen corresponding path program 1 times [2023-11-06 22:12:20,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:20,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100822320] [2023-11-06 22:12:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:20,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:12:20,876 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:12:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:12:20,920 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:12:20,928 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:12:20,928 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-06 22:12:20,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-06 22:12:20,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-06 22:12:20,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-06 22:12:20,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-06 22:12:20,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-06 22:12:20,930 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-06 22:12:20,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:12:20,931 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:12:20,931 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:12:20,932 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-06 22:12:20,971 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:12:20,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 204 transitions, 462 flow [2023-11-06 22:12:21,025 INFO L124 PetriNetUnfolderBase]: 31/280 cut-off events. [2023-11-06 22:12:21,025 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-06 22:12:21,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 280 events. 31/280 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 794 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 256. Up to 14 conditions per place. [2023-11-06 22:12:21,031 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 204 transitions, 462 flow [2023-11-06 22:12:21,036 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 204 transitions, 462 flow [2023-11-06 22:12:21,036 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:12:21,036 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 204 transitions, 462 flow [2023-11-06 22:12:21,036 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 204 transitions, 462 flow [2023-11-06 22:12:21,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 204 transitions, 462 flow [2023-11-06 22:12:21,087 INFO L124 PetriNetUnfolderBase]: 31/280 cut-off events. [2023-11-06 22:12:21,087 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-06 22:12:21,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 280 events. 31/280 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 794 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 256. Up to 14 conditions per place. [2023-11-06 22:12:21,162 INFO L119 LiptonReduction]: Number of co-enabled transitions 30972 [2023-11-06 22:12:27,623 INFO L134 LiptonReduction]: Checked pairs total: 27145 [2023-11-06 22:12:27,623 INFO L136 LiptonReduction]: Total number of compositions: 223 [2023-11-06 22:12:27,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:12:27,626 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@7fa07510, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:12:27,626 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-06 22:12:27,628 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:12:27,629 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-06 22:12:27,629 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:12:27,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:27,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:12:27,630 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-06 22:12:27,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:27,630 INFO L85 PathProgramCache]: Analyzing trace with hash 59249977, now seen corresponding path program 1 times [2023-11-06 22:12:27,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:27,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292174873] [2023-11-06 22:12:27,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:27,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:27,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:27,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292174873] [2023-11-06 22:12:27,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292174873] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:27,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:12:27,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:12:27,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838406135] [2023-11-06 22:12:27,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:27,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:12:27,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:27,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:12:27,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:12:27,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 427 [2023-11-06 22:12:27,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 30 transitions, 114 flow. Second operand has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 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) [2023-11-06 22:12:27,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:27,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 427 [2023-11-06 22:12:27,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:29,647 INFO L124 PetriNetUnfolderBase]: 7292/10449 cut-off events. [2023-11-06 22:12:29,648 INFO L125 PetriNetUnfolderBase]: For 9628/9628 co-relation queries the response was YES. [2023-11-06 22:12:29,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22304 conditions, 10449 events. 7292/10449 cut-off events. For 9628/9628 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 57390 event pairs, 7292 based on Foata normal form. 0/10085 useless extension candidates. Maximal degree in co-relation 6460. Up to 9479 conditions per place. [2023-11-06 22:12:29,838 INFO L140 encePairwiseOnDemand]: 420/427 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2023-11-06 22:12:29,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 23 transitions, 140 flow [2023-11-06 22:12:29,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:12:29,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:12:29,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 371 transitions. [2023-11-06 22:12:29,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4344262295081967 [2023-11-06 22:12:29,842 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 371 transitions. [2023-11-06 22:12:29,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 371 transitions. [2023-11-06 22:12:29,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:29,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 371 transitions. [2023-11-06 22:12:29,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 185.5) internal successors, (371), 2 states have internal predecessors, (371), 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) [2023-11-06 22:12:29,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 427.0) internal successors, (1281), 3 states have internal predecessors, (1281), 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) [2023-11-06 22:12:29,850 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 427.0) internal successors, (1281), 3 states have internal predecessors, (1281), 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) [2023-11-06 22:12:29,850 INFO L175 Difference]: Start difference. First operand has 43 places, 30 transitions, 114 flow. Second operand 2 states and 371 transitions. [2023-11-06 22:12:29,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 23 transitions, 140 flow [2023-11-06 22:12:29,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 23 transitions, 120 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-11-06 22:12:29,863 INFO L231 Difference]: Finished difference. Result has 37 places, 23 transitions, 80 flow [2023-11-06 22:12:29,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=80, PETRI_PLACES=37, PETRI_TRANSITIONS=23} [2023-11-06 22:12:29,865 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -6 predicate places. [2023-11-06 22:12:29,865 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 23 transitions, 80 flow [2023-11-06 22:12:29,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 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) [2023-11-06 22:12:29,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:29,867 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:29,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:12:29,867 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-06 22:12:29,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:29,868 INFO L85 PathProgramCache]: Analyzing trace with hash -741744962, now seen corresponding path program 1 times [2023-11-06 22:12:29,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:29,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111197367] [2023-11-06 22:12:29,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:29,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:12:29,906 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:12:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:12:29,939 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:12:29,940 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:12:29,940 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-06 22:12:29,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2023-11-06 22:12:29,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2023-11-06 22:12:29,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2023-11-06 22:12:29,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2023-11-06 22:12:29,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2023-11-06 22:12:29,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2023-11-06 22:12:29,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2023-11-06 22:12:29,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 22:12:29,942 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:12:29,945 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:12:29,945 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-11-06 22:12:29,990 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:12:29,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 234 transitions, 538 flow [2023-11-06 22:12:30,067 INFO L124 PetriNetUnfolderBase]: 36/323 cut-off events. [2023-11-06 22:12:30,067 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-06 22:12:30,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 323 events. 36/323 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 959 event pairs, 0 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 306. Up to 16 conditions per place. [2023-11-06 22:12:30,076 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 234 transitions, 538 flow [2023-11-06 22:12:30,081 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 234 transitions, 538 flow [2023-11-06 22:12:30,081 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:12:30,081 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 234 transitions, 538 flow [2023-11-06 22:12:30,082 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 234 transitions, 538 flow [2023-11-06 22:12:30,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 234 transitions, 538 flow [2023-11-06 22:12:30,151 INFO L124 PetriNetUnfolderBase]: 36/323 cut-off events. [2023-11-06 22:12:30,152 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-06 22:12:30,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 323 events. 36/323 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 959 event pairs, 0 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 306. Up to 16 conditions per place. [2023-11-06 22:12:30,182 INFO L119 LiptonReduction]: Number of co-enabled transitions 42224 [2023-11-06 22:12:38,718 INFO L134 LiptonReduction]: Checked pairs total: 41628 [2023-11-06 22:12:38,718 INFO L136 LiptonReduction]: Total number of compositions: 265 [2023-11-06 22:12:38,720 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:12:38,721 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@7fa07510, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:12:38,721 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-06 22:12:38,723 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:12:38,723 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-11-06 22:12:38,723 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:12:38,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:38,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:12:38,724 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-11-06 22:12:38,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:38,725 INFO L85 PathProgramCache]: Analyzing trace with hash 75481490, now seen corresponding path program 1 times [2023-11-06 22:12:38,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:38,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010596874] [2023-11-06 22:12:38,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:38,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:38,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:38,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010596874] [2023-11-06 22:12:38,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010596874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:38,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:12:38,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:12:38,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799305570] [2023-11-06 22:12:38,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:38,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:12:38,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:38,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:12:38,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:12:38,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 499 [2023-11-06 22:12:38,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 146 flow. Second operand has 2 states, 2 states have (on average 199.0) internal successors, (398), 2 states have internal predecessors, (398), 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) [2023-11-06 22:12:38,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:38,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 499 [2023-11-06 22:12:38,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:45,032 INFO L124 PetriNetUnfolderBase]: 26246/35721 cut-off events. [2023-11-06 22:12:45,032 INFO L125 PetriNetUnfolderBase]: For 40003/40003 co-relation queries the response was YES. [2023-11-06 22:12:45,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76737 conditions, 35721 events. 26246/35721 cut-off events. For 40003/40003 co-relation queries the response was YES. Maximal size of possible extension queue 1425. Compared 205723 event pairs, 26246 based on Foata normal form. 0/34628 useless extension candidates. Maximal degree in co-relation 22660. Up to 32807 conditions per place. [2023-11-06 22:12:45,322 INFO L140 encePairwiseOnDemand]: 489/499 looper letters, 23 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2023-11-06 22:12:45,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 26 transitions, 168 flow [2023-11-06 22:12:45,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:12:45,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:12:45,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 427 transitions. [2023-11-06 22:12:45,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278557114228457 [2023-11-06 22:12:45,326 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 427 transitions. [2023-11-06 22:12:45,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 427 transitions. [2023-11-06 22:12:45,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:12:45,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 427 transitions. [2023-11-06 22:12:45,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 213.5) internal successors, (427), 2 states have internal predecessors, (427), 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) [2023-11-06 22:12:45,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 499.0) internal successors, (1497), 3 states have internal predecessors, (1497), 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) [2023-11-06 22:12:45,334 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 499.0) internal successors, (1497), 3 states have internal predecessors, (1497), 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) [2023-11-06 22:12:45,334 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 146 flow. Second operand 2 states and 427 transitions. [2023-11-06 22:12:45,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 26 transitions, 168 flow [2023-11-06 22:12:45,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 26 transitions, 138 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-11-06 22:12:45,369 INFO L231 Difference]: Finished difference. Result has 42 places, 26 transitions, 92 flow [2023-11-06 22:12:45,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=92, PETRI_PLACES=42, PETRI_TRANSITIONS=26} [2023-11-06 22:12:45,370 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -9 predicate places. [2023-11-06 22:12:45,371 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 26 transitions, 92 flow [2023-11-06 22:12:45,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 199.0) internal successors, (398), 2 states have internal predecessors, (398), 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) [2023-11-06 22:12:45,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:45,372 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:12:45,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 22:12:45,372 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2023-11-06 22:12:45,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:45,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1515092384, now seen corresponding path program 1 times [2023-11-06 22:12:45,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:45,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082604633] [2023-11-06 22:12:45,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:45,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:12:45,414 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:12:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:12:45,447 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:12:45,447 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:12:45,448 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-06 22:12:45,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-11-06 22:12:45,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2023-11-06 22:12:45,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-11-06 22:12:45,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-11-06 22:12:45,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-11-06 22:12:45,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-11-06 22:12:45,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-11-06 22:12:45,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-11-06 22:12:45,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 22:12:45,450 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:12:45,451 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:12:45,451 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-11-06 22:12:45,502 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:12:45,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 264 transitions, 616 flow [2023-11-06 22:12:45,598 INFO L124 PetriNetUnfolderBase]: 41/366 cut-off events. [2023-11-06 22:12:45,598 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-06 22:12:45,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 366 events. 41/366 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1118 event pairs, 0 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 357. Up to 18 conditions per place. [2023-11-06 22:12:45,608 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 264 transitions, 616 flow [2023-11-06 22:12:45,615 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 248 places, 264 transitions, 616 flow [2023-11-06 22:12:45,615 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:12:45,616 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 248 places, 264 transitions, 616 flow [2023-11-06 22:12:45,616 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 248 places, 264 transitions, 616 flow [2023-11-06 22:12:45,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 264 transitions, 616 flow [2023-11-06 22:12:45,703 INFO L124 PetriNetUnfolderBase]: 41/366 cut-off events. [2023-11-06 22:12:45,703 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-06 22:12:45,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 366 events. 41/366 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1118 event pairs, 0 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 357. Up to 18 conditions per place. [2023-11-06 22:12:45,739 INFO L119 LiptonReduction]: Number of co-enabled transitions 55216 [2023-11-06 22:12:54,945 INFO L134 LiptonReduction]: Checked pairs total: 54068 [2023-11-06 22:12:54,945 INFO L136 LiptonReduction]: Total number of compositions: 295 [2023-11-06 22:12:54,947 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:12:54,948 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@7fa07510, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:12:54,948 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-06 22:12:54,950 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:12:54,950 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2023-11-06 22:12:54,950 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:12:54,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:54,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:12:54,951 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-11-06 22:12:54,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:54,951 INFO L85 PathProgramCache]: Analyzing trace with hash 93434510, now seen corresponding path program 1 times [2023-11-06 22:12:54,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:54,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134384299] [2023-11-06 22:12:54,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:54,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:12:54,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:54,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134384299] [2023-11-06 22:12:54,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134384299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:12:54,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:12:54,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:12:54,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089659181] [2023-11-06 22:12:54,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:12:54,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:12:54,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:54,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:12:54,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:12:54,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 559 [2023-11-06 22:12:54,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 42 transitions, 172 flow. Second operand has 2 states, 2 states have (on average 224.0) internal successors, (448), 2 states have internal predecessors, (448), 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) [2023-11-06 22:12:54,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:54,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 559 [2023-11-06 22:12:54,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:13:12,710 INFO L124 PetriNetUnfolderBase]: 91856/120285 cut-off events. [2023-11-06 22:13:12,710 INFO L125 PetriNetUnfolderBase]: For 158830/158830 co-relation queries the response was YES. [2023-11-06 22:13:13,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259717 conditions, 120285 events. 91856/120285 cut-off events. For 158830/158830 co-relation queries the response was YES. Maximal size of possible extension queue 4108. Compared 716548 event pairs, 91856 based on Foata normal form. 0/117005 useless extension candidates. Maximal degree in co-relation 77821. Up to 111539 conditions per place. [2023-11-06 22:13:14,052 INFO L140 encePairwiseOnDemand]: 548/559 looper letters, 26 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2023-11-06 22:13:14,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 29 transitions, 198 flow [2023-11-06 22:13:14,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:13:14,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:13:14,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 481 transitions. [2023-11-06 22:13:14,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2023-11-06 22:13:14,055 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 481 transitions. [2023-11-06 22:13:14,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 481 transitions. [2023-11-06 22:13:14,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:13:14,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 481 transitions. [2023-11-06 22:13:14,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 240.5) internal successors, (481), 2 states have internal predecessors, (481), 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) [2023-11-06 22:13:14,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 559.0) internal successors, (1677), 3 states have internal predecessors, (1677), 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) [2023-11-06 22:13:14,063 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 559.0) internal successors, (1677), 3 states have internal predecessors, (1677), 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) [2023-11-06 22:13:14,063 INFO L175 Difference]: Start difference. First operand has 57 places, 42 transitions, 172 flow. Second operand 2 states and 481 transitions. [2023-11-06 22:13:14,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 29 transitions, 198 flow [2023-11-06 22:13:14,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 29 transitions, 156 flow, removed 21 selfloop flow, removed 0 redundant places. [2023-11-06 22:13:14,281 INFO L231 Difference]: Finished difference. Result has 47 places, 29 transitions, 104 flow [2023-11-06 22:13:14,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=559, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=104, PETRI_PLACES=47, PETRI_TRANSITIONS=29} [2023-11-06 22:13:14,282 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -10 predicate places. [2023-11-06 22:13:14,282 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 29 transitions, 104 flow [2023-11-06 22:13:14,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 224.0) internal successors, (448), 2 states have internal predecessors, (448), 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) [2023-11-06 22:13:14,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:14,283 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:13:14,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 22:13:14,283 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2023-11-06 22:13:14,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:14,284 INFO L85 PathProgramCache]: Analyzing trace with hash -289520230, now seen corresponding path program 1 times [2023-11-06 22:13:14,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:14,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831276898] [2023-11-06 22:13:14,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:14,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:13:14,318 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:13:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:13:14,354 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:13:14,355 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:13:14,355 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-06 22:13:14,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 10 remaining) [2023-11-06 22:13:14,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 10 remaining) [2023-11-06 22:13:14,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 10 remaining) [2023-11-06 22:13:14,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 10 remaining) [2023-11-06 22:13:14,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 10 remaining) [2023-11-06 22:13:14,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 10 remaining) [2023-11-06 22:13:14,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 10 remaining) [2023-11-06 22:13:14,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 10 remaining) [2023-11-06 22:13:14,357 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 10 remaining) [2023-11-06 22:13:14,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-06 22:13:14,357 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:13:14,358 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:13:14,358 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-11-06 22:13:14,408 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:13:14,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 294 transitions, 696 flow [2023-11-06 22:13:14,481 INFO L124 PetriNetUnfolderBase]: 46/409 cut-off events. [2023-11-06 22:13:14,481 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-11-06 22:13:14,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 409 events. 46/409 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1279 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 410. Up to 20 conditions per place. [2023-11-06 22:13:14,488 INFO L82 GeneralOperation]: Start removeDead. Operand has 276 places, 294 transitions, 696 flow [2023-11-06 22:13:14,494 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 276 places, 294 transitions, 696 flow [2023-11-06 22:13:14,494 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:13:14,494 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 276 places, 294 transitions, 696 flow [2023-11-06 22:13:14,494 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 276 places, 294 transitions, 696 flow [2023-11-06 22:13:14,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 276 places, 294 transitions, 696 flow [2023-11-06 22:13:14,599 INFO L124 PetriNetUnfolderBase]: 46/409 cut-off events. [2023-11-06 22:13:14,599 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-11-06 22:13:14,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 409 events. 46/409 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1279 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 410. Up to 20 conditions per place. [2023-11-06 22:13:14,642 INFO L119 LiptonReduction]: Number of co-enabled transitions 69948 [2023-11-06 22:13:23,054 INFO L134 LiptonReduction]: Checked pairs total: 67887 [2023-11-06 22:13:23,054 INFO L136 LiptonReduction]: Total number of compositions: 327 [2023-11-06 22:13:23,056 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:13:23,056 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@7fa07510, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:13:23,057 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-06 22:13:23,058 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:13:23,058 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-06 22:13:23,058 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:13:23,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:13:23,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:13:23,059 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-11-06 22:13:23,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:13:23,059 INFO L85 PathProgramCache]: Analyzing trace with hash 113099094, now seen corresponding path program 1 times [2023-11-06 22:13:23,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:13:23,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107846642] [2023-11-06 22:13:23,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:13:23,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:13:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:13:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:13:23,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:13:23,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107846642] [2023-11-06 22:13:23,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107846642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:13:23,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:13:23,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:13:23,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290777081] [2023-11-06 22:13:23,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:13:23,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:13:23,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:13:23,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:13:23,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:13:23,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 621 [2023-11-06 22:13:23,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 46 transitions, 200 flow. Second operand has 2 states, 2 states have (on average 249.0) internal successors, (498), 2 states have internal predecessors, (498), 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) [2023-11-06 22:13:23,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:13:23,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 621 [2023-11-06 22:13:23,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand