./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/18_read_write_lock.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/18_read_write_lock.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 72289b7b84ec29dc48aff6fa2f8d521998f594af518139867a01f104107e1865 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:08:12,020 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:08:12,097 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:08:12,102 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:08:12,103 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:08:12,126 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:08:12,127 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:08:12,128 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:08:12,128 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:08:12,131 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:08:12,132 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:08:12,132 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:08:12,133 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:08:12,134 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:08:12,134 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:08:12,134 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:08:12,134 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:08:12,135 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:08:12,135 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:08:12,135 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:08:12,135 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:08:12,136 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:08:12,136 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:08:12,136 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:08:12,136 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:08:12,136 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:08:12,137 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:08:12,137 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:08:12,137 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:08:12,138 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:08:12,138 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:08:12,138 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:08:12,139 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:08:12,139 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:08:12,139 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:08:12,139 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:08:12,139 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:08:12,140 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:08:12,140 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:08:12,140 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:08:12,140 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:08:12,140 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:08:12,141 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:08:12,141 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72289b7b84ec29dc48aff6fa2f8d521998f594af518139867a01f104107e1865 [2024-01-27 15:08:12,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:08:12,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:08:12,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:08:12,338 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:08:12,339 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:08:12,340 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/18_read_write_lock.i [2024-01-27 15:08:13,335 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:08:13,586 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:08:13,586 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/18_read_write_lock.i [2024-01-27 15:08:13,598 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3aa69335a/a830ad205c474668b2f4f019eb6a7763/FLAG233b5fca1 [2024-01-27 15:08:13,621 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3aa69335a/a830ad205c474668b2f4f019eb6a7763 [2024-01-27 15:08:13,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:08:13,626 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:08:13,629 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:08:13,629 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:08:13,632 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:08:13,633 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:08:13" (1/1) ... [2024-01-27 15:08:13,633 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@496da96a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:13, skipping insertion in model container [2024-01-27 15:08:13,634 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:08:13" (1/1) ... [2024-01-27 15:08:13,672 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:08:13,919 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/18_read_write_lock.i[31161,31174] [2024-01-27 15:08:13,930 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:08:13,936 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:08:13,971 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/18_read_write_lock.i[31161,31174] [2024-01-27 15:08:13,973 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:08:14,009 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:08:14,009 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:14 WrapperNode [2024-01-27 15:08:14,009 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:08:14,010 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:08:14,010 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:08:14,010 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:08:14,015 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:14" (1/1) ... [2024-01-27 15:08:14,023 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:14" (1/1) ... [2024-01-27 15:08:14,044 INFO L138 Inliner]: procedures = 173, calls = 31, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 77 [2024-01-27 15:08:14,044 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:08:14,045 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:08:14,045 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:08:14,045 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:08:14,054 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:14" (1/1) ... [2024-01-27 15:08:14,054 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:14" (1/1) ... [2024-01-27 15:08:14,057 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:14" (1/1) ... [2024-01-27 15:08:14,072 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [2, 1]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-01-27 15:08:14,072 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:14" (1/1) ... [2024-01-27 15:08:14,074 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:14" (1/1) ... [2024-01-27 15:08:14,077 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:14" (1/1) ... [2024-01-27 15:08:14,078 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:14" (1/1) ... [2024-01-27 15:08:14,082 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:14" (1/1) ... [2024-01-27 15:08:14,083 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:14" (1/1) ... [2024-01-27 15:08:14,084 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:08:14,085 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:08:14,085 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:08:14,085 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:08:14,086 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:14" (1/1) ... [2024-01-27 15:08:14,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:08:14,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:08:14,300 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 15:08:14,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 15:08:14,336 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-01-27 15:08:14,336 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-01-27 15:08:14,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:08:14,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:08:14,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:08:14,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:08:14,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:08:14,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:08:14,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:08:14,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:08:14,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:08:14,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:08:14,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:08:14,338 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:08:14,429 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:08:14,430 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:08:14,534 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:08:14,534 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:08:14,611 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:08:14,612 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-01-27 15:08:14,612 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:08:14 BoogieIcfgContainer [2024-01-27 15:08:14,612 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:08:14,614 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:08:14,614 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:08:14,616 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:08:14,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:08:13" (1/3) ... [2024-01-27 15:08:14,617 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@458d65b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:08:14, skipping insertion in model container [2024-01-27 15:08:14,617 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:08:14" (2/3) ... [2024-01-27 15:08:14,617 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@458d65b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:08:14, skipping insertion in model container [2024-01-27 15:08:14,617 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:08:14" (3/3) ... [2024-01-27 15:08:14,618 INFO L112 eAbstractionObserver]: Analyzing ICFG 18_read_write_lock.i [2024-01-27 15:08:14,624 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:08:14,631 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:08:14,631 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:08:14,631 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:08:14,657 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:08:14,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 21 transitions, 46 flow [2024-01-27 15:08:14,717 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2024-01-27 15:08:14,718 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:08:14,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 20 events. 1/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-01-27 15:08:14,720 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 21 transitions, 46 flow [2024-01-27 15:08:14,722 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 15 transitions, 33 flow [2024-01-27 15:08:14,733 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:08:14,740 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=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@37312d1c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:08:14,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-01-27 15:08:14,749 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:08:14,756 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2024-01-27 15:08:14,756 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:08:14,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:08:14,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:08:14,758 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:08:14,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:08:14,763 INFO L85 PathProgramCache]: Analyzing trace with hash -732317163, now seen corresponding path program 1 times [2024-01-27 15:08:14,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:08:14,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027038385] [2024-01-27 15:08:14,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:08:14,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:08:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:08:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:08:15,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:08:15,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027038385] [2024-01-27 15:08:15,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027038385] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:08:15,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:08:15,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:08:15,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044418143] [2024-01-27 15:08:15,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:08:15,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:08:15,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:08:15,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:08:15,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:08:15,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 21 [2024-01-27 15:08:15,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 33 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 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) [2024-01-27 15:08:15,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:08:15,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 21 [2024-01-27 15:08:15,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:08:15,188 INFO L124 PetriNetUnfolderBase]: 20/71 cut-off events. [2024-01-27 15:08:15,189 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:08:15,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 71 events. 20/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 224 event pairs, 4 based on Foata normal form. 6/77 useless extension candidates. Maximal degree in co-relation 128. Up to 27 conditions per place. [2024-01-27 15:08:15,190 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 12 selfloop transitions, 5 changer transitions 13/33 dead transitions. [2024-01-27 15:08:15,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 33 transitions, 129 flow [2024-01-27 15:08:15,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-27 15:08:15,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-27 15:08:15,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2024-01-27 15:08:15,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-01-27 15:08:15,200 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 33 flow. Second operand 8 states and 80 transitions. [2024-01-27 15:08:15,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 33 transitions, 129 flow [2024-01-27 15:08:15,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 33 transitions, 128 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:08:15,203 INFO L231 Difference]: Finished difference. Result has 30 places, 17 transitions, 61 flow [2024-01-27 15:08:15,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=61, PETRI_PLACES=30, PETRI_TRANSITIONS=17} [2024-01-27 15:08:15,207 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 11 predicate places. [2024-01-27 15:08:15,207 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 17 transitions, 61 flow [2024-01-27 15:08:15,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 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) [2024-01-27 15:08:15,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:08:15,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:08:15,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:08:15,208 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:08:15,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:08:15,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1783622022, now seen corresponding path program 1 times [2024-01-27 15:08:15,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:08:15,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406195934] [2024-01-27 15:08:15,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:08:15,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:08:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:08:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:08:15,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:08:15,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406195934] [2024-01-27 15:08:15,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406195934] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:08:15,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:08:15,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:08:15,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499194803] [2024-01-27 15:08:15,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:08:15,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:08:15,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:08:15,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:08:15,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:08:15,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 21 [2024-01-27 15:08:15,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 17 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2024-01-27 15:08:15,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:08:15,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 21 [2024-01-27 15:08:15,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:08:15,303 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-01-27 15:08:15,303 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:08:15,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 20 events. 2/20 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 1/21 useless extension candidates. Maximal degree in co-relation 41. Up to 7 conditions per place. [2024-01-27 15:08:15,304 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 5 selfloop transitions, 2 changer transitions 1/18 dead transitions. [2024-01-27 15:08:15,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 18 transitions, 79 flow [2024-01-27 15:08:15,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:08:15,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:08:15,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2024-01-27 15:08:15,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2024-01-27 15:08:15,305 INFO L175 Difference]: Start difference. First operand has 30 places, 17 transitions, 61 flow. Second operand 3 states and 45 transitions. [2024-01-27 15:08:15,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 18 transitions, 79 flow [2024-01-27 15:08:15,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 18 transitions, 68 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-01-27 15:08:15,306 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 58 flow [2024-01-27 15:08:15,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2024-01-27 15:08:15,307 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 6 predicate places. [2024-01-27 15:08:15,307 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 58 flow [2024-01-27 15:08:15,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2024-01-27 15:08:15,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:08:15,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:08:15,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:08:15,308 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:08:15,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:08:15,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1186347696, now seen corresponding path program 2 times [2024-01-27 15:08:15,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:08:15,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210568055] [2024-01-27 15:08:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:08:15,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:08:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:08:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:08:15,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:08:15,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210568055] [2024-01-27 15:08:15,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210568055] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:08:15,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:08:15,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:08:15,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001260552] [2024-01-27 15:08:15,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:08:15,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:08:15,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:08:15,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:08:15,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:08:15,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 21 [2024-01-27 15:08:15,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2024-01-27 15:08:15,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:08:15,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 21 [2024-01-27 15:08:15,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:08:15,365 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2024-01-27 15:08:15,365 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-01-27 15:08:15,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 11 events. 1/11 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 8 event pairs, 1 based on Foata normal form. 1/12 useless extension candidates. Maximal degree in co-relation 23. Up to 6 conditions per place. [2024-01-27 15:08:15,366 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2024-01-27 15:08:15,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 9 transitions, 41 flow [2024-01-27 15:08:15,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:08:15,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:08:15,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 54 transitions. [2024-01-27 15:08:15,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-01-27 15:08:15,367 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 58 flow. Second operand 4 states and 54 transitions. [2024-01-27 15:08:15,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 9 transitions, 41 flow [2024-01-27 15:08:15,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 9 transitions, 35 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:08:15,368 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2024-01-27 15:08:15,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=25, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2024-01-27 15:08:15,368 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2024-01-27 15:08:15,368 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2024-01-27 15:08:15,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2024-01-27 15:08:15,371 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-01-27 15:08:15,371 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2024-01-27 15:08:15,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:08:15,371 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2024-01-27 15:08:15,375 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-01-27 15:08:15,375 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-01-27 15:08:15,383 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 03:08:15 BasicIcfg [2024-01-27 15:08:15,383 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-01-27 15:08:15,383 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-01-27 15:08:15,384 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-01-27 15:08:15,384 INFO L274 PluginConnector]: Witness Printer initialized [2024-01-27 15:08:15,385 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:08:14" (3/4) ... [2024-01-27 15:08:15,386 INFO L137 WitnessPrinter]: Generating witness for correct program [2024-01-27 15:08:15,388 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thr1 [2024-01-27 15:08:15,393 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 39 nodes and edges [2024-01-27 15:08:15,393 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2024-01-27 15:08:15,393 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-01-27 15:08:15,393 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-01-27 15:08:15,460 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-01-27 15:08:15,460 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-01-27 15:08:15,460 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-01-27 15:08:15,460 INFO L158 Benchmark]: Toolchain (without parser) took 1834.14ms. Allocated memory is still 161.5MB. Free memory was 129.7MB in the beginning and 86.3MB in the end (delta: 43.4MB). Peak memory consumption was 42.3MB. Max. memory is 16.1GB. [2024-01-27 15:08:15,462 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 123.7MB. Free memory is still 85.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-01-27 15:08:15,462 INFO L158 Benchmark]: CACSL2BoogieTranslator took 380.82ms. Allocated memory is still 161.5MB. Free memory was 129.7MB in the beginning and 109.4MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-01-27 15:08:15,462 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.56ms. Allocated memory is still 161.5MB. Free memory was 109.4MB in the beginning and 107.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-27 15:08:15,462 INFO L158 Benchmark]: Boogie Preprocessor took 39.59ms. Allocated memory is still 161.5MB. Free memory was 107.3MB in the beginning and 105.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-27 15:08:15,463 INFO L158 Benchmark]: RCFGBuilder took 527.10ms. Allocated memory is still 161.5MB. Free memory was 105.2MB in the beginning and 85.0MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-01-27 15:08:15,463 INFO L158 Benchmark]: TraceAbstraction took 769.45ms. Allocated memory is still 161.5MB. Free memory was 84.3MB in the beginning and 90.5MB in the end (delta: -6.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-01-27 15:08:15,463 INFO L158 Benchmark]: Witness Printer took 76.69ms. Allocated memory is still 161.5MB. Free memory was 90.5MB in the beginning and 86.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-01-27 15:08:15,464 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 123.7MB. Free memory is still 85.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 380.82ms. Allocated memory is still 161.5MB. Free memory was 129.7MB in the beginning and 109.4MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.56ms. Allocated memory is still 161.5MB. Free memory was 109.4MB in the beginning and 107.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.59ms. Allocated memory is still 161.5MB. Free memory was 107.3MB in the beginning and 105.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 527.10ms. Allocated memory is still 161.5MB. Free memory was 105.2MB in the beginning and 85.0MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 769.45ms. Allocated memory is still 161.5MB. Free memory was 84.3MB in the beginning and 90.5MB in the end (delta: -6.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 76.69ms. Allocated memory is still 161.5MB. Free memory was 90.5MB in the beginning and 86.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 738]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 28 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 0.7s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 32 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 27 mSDsluCounter, 10 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 114 IncrementalHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 3 mSDtfsCounter, 114 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=1, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 33 ConstructedInterpolants, 0 QuantifiedInterpolants, 55 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-01-27 15:08:15,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE