./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/read_write_lock-1-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/read_write_lock-1-pthread.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 04a1d4ff1109dce80fd92bb8b947109ce8379b8f1a452f4ba67af1891a651644 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 14:18:09,048 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 14:18:09,132 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 14:18:09,142 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 14:18:09,143 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 14:18:09,181 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 14:18:09,182 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 14:18:09,183 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 14:18:09,183 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 14:18:09,184 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 14:18:09,185 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 14:18:09,185 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 14:18:09,186 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 14:18:09,187 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 14:18:09,188 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 14:18:09,188 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 14:18:09,189 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 14:18:09,189 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 14:18:09,190 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 14:18:09,192 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 14:18:09,192 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 14:18:09,193 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 14:18:09,193 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 14:18:09,193 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 14:18:09,193 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 14:18:09,194 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 14:18:09,194 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 14:18:09,194 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 14:18:09,194 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 14:18:09,195 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 14:18:09,195 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 14:18:09,195 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 14:18:09,195 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:18:09,196 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 14:18:09,196 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 14:18:09,196 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 14:18:09,197 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 14:18:09,197 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 14:18:09,198 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 14:18:09,198 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 14:18:09,198 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 14:18:09,199 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 14:18:09,199 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04a1d4ff1109dce80fd92bb8b947109ce8379b8f1a452f4ba67af1891a651644 [2024-10-14 14:18:09,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 14:18:09,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 14:18:09,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 14:18:09,481 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 14:18:09,481 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 14:18:09,483 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/read_write_lock-1-pthread.i [2024-10-14 14:18:10,942 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 14:18:11,166 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 14:18:11,167 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/read_write_lock-1-pthread.i [2024-10-14 14:18:11,189 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e14d6ad9/a8f4137a559c41108e2a0b168308d684/FLAGf3f4cfbf6 [2024-10-14 14:18:11,509 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e14d6ad9/a8f4137a559c41108e2a0b168308d684 [2024-10-14 14:18:11,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 14:18:11,512 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 14:18:11,514 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 14:18:11,514 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 14:18:11,518 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 14:18:11,519 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:18:11" (1/1) ... [2024-10-14 14:18:11,520 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4773f70d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:18:11, skipping insertion in model container [2024-10-14 14:18:11,520 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:18:11" (1/1) ... [2024-10-14 14:18:11,564 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 14:18:11,868 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/read_write_lock-1-pthread.i[30919,30932] [2024-10-14 14:18:11,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:18:11,897 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 14:18:11,942 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/read_write_lock-1-pthread.i[30919,30932] [2024-10-14 14:18:11,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:18:11,993 INFO L204 MainTranslator]: Completed translation [2024-10-14 14:18:11,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:18:11 WrapperNode [2024-10-14 14:18:11,994 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 14:18:11,995 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 14:18:11,996 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 14:18:11,996 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 14:18:12,002 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:18:11" (1/1) ... [2024-10-14 14:18:12,014 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:18:11" (1/1) ... [2024-10-14 14:18:12,046 INFO L138 Inliner]: procedures = 165, calls = 34, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 57 [2024-10-14 14:18:12,046 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 14:18:12,047 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 14:18:12,048 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 14:18:12,048 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 14:18:12,059 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:18:11" (1/1) ... [2024-10-14 14:18:12,059 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:18:11" (1/1) ... [2024-10-14 14:18:12,064 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:18:11" (1/1) ... [2024-10-14 14:18:12,077 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 11]. The 0 writes are split as follows [0, 0]. [2024-10-14 14:18:12,077 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:18:11" (1/1) ... [2024-10-14 14:18:12,077 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:18:11" (1/1) ... [2024-10-14 14:18:12,083 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:18:11" (1/1) ... [2024-10-14 14:18:12,087 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:18:11" (1/1) ... [2024-10-14 14:18:12,089 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:18:11" (1/1) ... [2024-10-14 14:18:12,090 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:18:11" (1/1) ... [2024-10-14 14:18:12,092 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 14:18:12,093 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 14:18:12,093 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 14:18:12,093 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 14:18:12,094 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:18:11" (1/1) ... [2024-10-14 14:18:12,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:18:12,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:18:12,134 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) [2024-10-14 14:18:12,140 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 [2024-10-14 14:18:12,189 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsRwLockUnlock [2024-10-14 14:18:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsRwLockReadLock [2024-10-14 14:18:12,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-14 14:18:12,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 14:18:12,191 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2024-10-14 14:18:12,192 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2024-10-14 14:18:12,192 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsRwLockWriteLock [2024-10-14 14:18:12,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 14:18:12,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 14:18:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-14 14:18:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 14:18:12,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 14:18:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2024-10-14 14:18:12,194 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2024-10-14 14:18:12,196 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 14:18:12,331 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 14:18:12,333 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 14:18:12,500 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 14:18:12,501 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 14:18:12,640 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 14:18:12,644 INFO L314 CfgBuilder]: Removed 0 assume(true) statements. [2024-10-14 14:18:12,645 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:18:12 BoogieIcfgContainer [2024-10-14 14:18:12,645 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 14:18:12,675 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 14:18:12,676 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 14:18:12,681 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 14:18:12,682 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:18:11" (1/3) ... [2024-10-14 14:18:12,682 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a4226b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:18:12, skipping insertion in model container [2024-10-14 14:18:12,682 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:18:11" (2/3) ... [2024-10-14 14:18:12,683 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a4226b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:18:12, skipping insertion in model container [2024-10-14 14:18:12,684 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:18:12" (3/3) ... [2024-10-14 14:18:12,685 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-1-pthread.i [2024-10-14 14:18:12,701 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 14:18:12,701 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 14:18:12,701 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 14:18:12,752 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-14 14:18:12,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 54 transitions, 136 flow [2024-10-14 14:18:12,819 INFO L124 PetriNetUnfolderBase]: 2/50 cut-off events. [2024-10-14 14:18:12,819 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-14 14:18:12,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 50 events. 2/50 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 106 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2024-10-14 14:18:12,826 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 54 transitions, 136 flow [2024-10-14 14:18:12,830 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 48 transitions, 117 flow [2024-10-14 14:18:12,838 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:18:12,843 INFO L333 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, 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;@6e575346, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:18:12,844 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-10-14 14:18:12,856 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:18:12,856 INFO L124 PetriNetUnfolderBase]: 1/34 cut-off events. [2024-10-14 14:18:12,856 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-14 14:18:12,857 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:18:12,857 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:18:12,858 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-14 14:18:12,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:18:12,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1561652, now seen corresponding path program 1 times [2024-10-14 14:18:12,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:18:12,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57531879] [2024-10-14 14:18:12,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:18:12,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:18:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:18:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:18:13,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:18:13,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57531879] [2024-10-14 14:18:13,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57531879] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:18:13,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:18:13,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 14:18:13,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621221633] [2024-10-14 14:18:13,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:18:13,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 14:18:13,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:18:13,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 14:18:13,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-14 14:18:13,315 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-14 14:18:13,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 48 transitions, 117 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 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) [2024-10-14 14:18:13,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:18:13,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-14 14:18:13,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:18:16,904 INFO L124 PetriNetUnfolderBase]: 23844/35987 cut-off events. [2024-10-14 14:18:16,904 INFO L125 PetriNetUnfolderBase]: For 2803/2803 co-relation queries the response was YES. [2024-10-14 14:18:17,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70708 conditions, 35987 events. 23844/35987 cut-off events. For 2803/2803 co-relation queries the response was YES. Maximal size of possible extension queue 1432. Compared 259871 event pairs, 2821 based on Foata normal form. 1894/36537 useless extension candidates. Maximal degree in co-relation 63845. Up to 10474 conditions per place. [2024-10-14 14:18:17,186 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 170 selfloop transitions, 29 changer transitions 8/218 dead transitions. [2024-10-14 14:18:17,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 218 transitions, 952 flow [2024-10-14 14:18:17,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 14:18:17,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-14 14:18:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 386 transitions. [2024-10-14 14:18:17,206 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6498316498316499 [2024-10-14 14:18:17,209 INFO L175 Difference]: Start difference. First operand has 59 places, 48 transitions, 117 flow. Second operand 11 states and 386 transitions. [2024-10-14 14:18:17,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 218 transitions, 952 flow [2024-10-14 14:18:17,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 218 transitions, 891 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-14 14:18:17,292 INFO L231 Difference]: Finished difference. Result has 70 places, 77 transitions, 302 flow [2024-10-14 14:18:17,294 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=302, PETRI_PLACES=70, PETRI_TRANSITIONS=77} [2024-10-14 14:18:17,298 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 11 predicate places. [2024-10-14 14:18:17,298 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 77 transitions, 302 flow [2024-10-14 14:18:17,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 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) [2024-10-14 14:18:17,300 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:18:17,300 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:18:17,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 14:18:17,301 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-14 14:18:17,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:18:17,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1618512467, now seen corresponding path program 1 times [2024-10-14 14:18:17,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:18:17,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805239894] [2024-10-14 14:18:17,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:18:17,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:18:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:18:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:18:17,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:18:17,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805239894] [2024-10-14 14:18:17,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805239894] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:18:17,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:18:17,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:18:17,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232505452] [2024-10-14 14:18:17,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:18:17,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:18:17,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:18:17,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:18:17,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:18:17,568 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-10-14 14:18:17,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2024-10-14 14:18:17,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:18:17,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-10-14 14:18:17,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:18:17,755 INFO L124 PetriNetUnfolderBase]: 800/2036 cut-off events. [2024-10-14 14:18:17,756 INFO L125 PetriNetUnfolderBase]: For 869/1295 co-relation queries the response was YES. [2024-10-14 14:18:17,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4732 conditions, 2036 events. 800/2036 cut-off events. For 869/1295 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15531 event pairs, 116 based on Foata normal form. 955/2902 useless extension candidates. Maximal degree in co-relation 4098. Up to 1072 conditions per place. [2024-10-14 14:18:17,771 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 44 selfloop transitions, 2 changer transitions 2/79 dead transitions. [2024-10-14 14:18:17,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 79 transitions, 399 flow [2024-10-14 14:18:17,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:18:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:18:17,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-10-14 14:18:17,775 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.654320987654321 [2024-10-14 14:18:17,776 INFO L175 Difference]: Start difference. First operand has 70 places, 77 transitions, 302 flow. Second operand 3 states and 106 transitions. [2024-10-14 14:18:17,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 79 transitions, 399 flow [2024-10-14 14:18:17,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 79 transitions, 399 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 14:18:17,793 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 291 flow [2024-10-14 14:18:17,793 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=291, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-10-14 14:18:17,794 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 7 predicate places. [2024-10-14 14:18:17,794 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 291 flow [2024-10-14 14:18:17,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2024-10-14 14:18:17,795 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:18:17,795 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:18:17,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 14:18:17,796 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-14 14:18:17,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:18:17,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1684547409, now seen corresponding path program 2 times [2024-10-14 14:18:17,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:18:17,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045537061] [2024-10-14 14:18:17,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:18:17,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:18:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:18:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:18:17,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:18:17,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045537061] [2024-10-14 14:18:17,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045537061] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:18:17,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:18:17,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:18:17,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670217559] [2024-10-14 14:18:17,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:18:17,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:18:17,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:18:17,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:18:17,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:18:17,901 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-10-14 14:18:17,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 291 flow. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2024-10-14 14:18:17,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:18:17,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-10-14 14:18:17,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:18:17,979 INFO L124 PetriNetUnfolderBase]: 116/374 cut-off events. [2024-10-14 14:18:17,980 INFO L125 PetriNetUnfolderBase]: For 234/241 co-relation queries the response was YES. [2024-10-14 14:18:17,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 828 conditions, 374 events. 116/374 cut-off events. For 234/241 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1945 event pairs, 9 based on Foata normal form. 52/407 useless extension candidates. Maximal degree in co-relation 806. Up to 177 conditions per place. [2024-10-14 14:18:17,983 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 20 selfloop transitions, 2 changer transitions 6/55 dead transitions. [2024-10-14 14:18:17,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 55 transitions, 257 flow [2024-10-14 14:18:17,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:18:17,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:18:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-10-14 14:18:17,985 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6049382716049383 [2024-10-14 14:18:17,985 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 291 flow. Second operand 3 states and 98 transitions. [2024-10-14 14:18:17,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 55 transitions, 257 flow [2024-10-14 14:18:17,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 55 transitions, 246 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-14 14:18:17,989 INFO L231 Difference]: Finished difference. Result has 61 places, 42 transitions, 162 flow [2024-10-14 14:18:17,989 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=61, PETRI_TRANSITIONS=42} [2024-10-14 14:18:17,990 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2024-10-14 14:18:17,990 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 42 transitions, 162 flow [2024-10-14 14:18:17,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2024-10-14 14:18:17,991 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:18:17,991 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:18:17,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 14:18:17,992 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-14 14:18:17,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:18:17,993 INFO L85 PathProgramCache]: Analyzing trace with hash -309757069, now seen corresponding path program 1 times [2024-10-14 14:18:17,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:18:17,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432618101] [2024-10-14 14:18:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:18:17,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:18:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:18:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:18:18,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:18:18,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432618101] [2024-10-14 14:18:18,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432618101] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:18:18,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:18:18,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 14:18:18,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124169494] [2024-10-14 14:18:18,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:18:18,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 14:18:18,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:18:18,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 14:18:18,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-14 14:18:18,092 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-14 14:18:18,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 42 transitions, 162 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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) [2024-10-14 14:18:18,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:18:18,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-14 14:18:18,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:18:18,239 INFO L124 PetriNetUnfolderBase]: 105/309 cut-off events. [2024-10-14 14:18:18,240 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2024-10-14 14:18:18,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 790 conditions, 309 events. 105/309 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1381 event pairs, 22 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 772. Up to 57 conditions per place. [2024-10-14 14:18:18,241 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 37 selfloop transitions, 9 changer transitions 11/72 dead transitions. [2024-10-14 14:18:18,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 72 transitions, 367 flow [2024-10-14 14:18:18,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 14:18:18,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 14:18:18,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-10-14 14:18:18,243 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37407407407407406 [2024-10-14 14:18:18,243 INFO L175 Difference]: Start difference. First operand has 61 places, 42 transitions, 162 flow. Second operand 10 states and 202 transitions. [2024-10-14 14:18:18,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 72 transitions, 367 flow [2024-10-14 14:18:18,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 351 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-10-14 14:18:18,246 INFO L231 Difference]: Finished difference. Result has 70 places, 44 transitions, 196 flow [2024-10-14 14:18:18,246 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=196, PETRI_PLACES=70, PETRI_TRANSITIONS=44} [2024-10-14 14:18:18,247 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 11 predicate places. [2024-10-14 14:18:18,247 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 44 transitions, 196 flow [2024-10-14 14:18:18,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 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) [2024-10-14 14:18:18,247 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:18:18,247 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:18:18,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 14:18:18,248 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-14 14:18:18,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:18:18,248 INFO L85 PathProgramCache]: Analyzing trace with hash 467992471, now seen corresponding path program 1 times [2024-10-14 14:18:18,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:18:18,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409761082] [2024-10-14 14:18:18,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:18:18,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:18:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:18:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:18:18,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:18:18,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409761082] [2024-10-14 14:18:18,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409761082] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:18:18,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:18:18,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 14:18:18,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797361741] [2024-10-14 14:18:18,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:18:18,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 14:18:18,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:18:18,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 14:18:18,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-14 14:18:18,335 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-14 14:18:18,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 44 transitions, 196 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-10-14 14:18:18,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:18:18,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-14 14:18:18,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:18:18,486 INFO L124 PetriNetUnfolderBase]: 105/269 cut-off events. [2024-10-14 14:18:18,486 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2024-10-14 14:18:18,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 778 conditions, 269 events. 105/269 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1070 event pairs, 22 based on Foata normal form. 2/269 useless extension candidates. Maximal degree in co-relation 761. Up to 64 conditions per place. [2024-10-14 14:18:18,489 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 23 selfloop transitions, 4 changer transitions 27/67 dead transitions. [2024-10-14 14:18:18,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 67 transitions, 371 flow [2024-10-14 14:18:18,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 14:18:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 14:18:18,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-10-14 14:18:18,491 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38271604938271603 [2024-10-14 14:18:18,491 INFO L175 Difference]: Start difference. First operand has 70 places, 44 transitions, 196 flow. Second operand 9 states and 186 transitions. [2024-10-14 14:18:18,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 67 transitions, 371 flow [2024-10-14 14:18:18,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 361 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-10-14 14:18:18,494 INFO L231 Difference]: Finished difference. Result has 67 places, 35 transitions, 147 flow [2024-10-14 14:18:18,494 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=147, PETRI_PLACES=67, PETRI_TRANSITIONS=35} [2024-10-14 14:18:18,497 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 8 predicate places. [2024-10-14 14:18:18,497 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 35 transitions, 147 flow [2024-10-14 14:18:18,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-10-14 14:18:18,498 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:18:18,498 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:18:18,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 14:18:18,498 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-14 14:18:18,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:18:18,499 INFO L85 PathProgramCache]: Analyzing trace with hash -717569101, now seen corresponding path program 1 times [2024-10-14 14:18:18,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:18:18,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893438744] [2024-10-14 14:18:18,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:18:18,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:18:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:18:18,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:18:18,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:18:18,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893438744] [2024-10-14 14:18:18,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893438744] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:18:18,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:18:18,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 14:18:18,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342256547] [2024-10-14 14:18:18,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:18:18,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 14:18:18,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:18:18,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 14:18:18,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-14 14:18:18,588 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-14 14:18:18,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 35 transitions, 147 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-10-14 14:18:18,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:18:18,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-14 14:18:18,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:18:18,720 INFO L124 PetriNetUnfolderBase]: 78/183 cut-off events. [2024-10-14 14:18:18,720 INFO L125 PetriNetUnfolderBase]: For 124/128 co-relation queries the response was YES. [2024-10-14 14:18:18,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 183 events. 78/183 cut-off events. For 124/128 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 559 event pairs, 22 based on Foata normal form. 6/188 useless extension candidates. Maximal degree in co-relation 505. Up to 57 conditions per place. [2024-10-14 14:18:18,722 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 0 selfloop transitions, 0 changer transitions 54/54 dead transitions. [2024-10-14 14:18:18,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 54 transitions, 297 flow [2024-10-14 14:18:18,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 14:18:18,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 14:18:18,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-10-14 14:18:18,724 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-10-14 14:18:18,724 INFO L175 Difference]: Start difference. First operand has 67 places, 35 transitions, 147 flow. Second operand 9 states and 180 transitions. [2024-10-14 14:18:18,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 54 transitions, 297 flow [2024-10-14 14:18:18,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 265 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-10-14 14:18:18,727 INFO L231 Difference]: Finished difference. Result has 57 places, 0 transitions, 0 flow [2024-10-14 14:18:18,727 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=57, PETRI_TRANSITIONS=0} [2024-10-14 14:18:18,727 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, -2 predicate places. [2024-10-14 14:18:18,728 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 0 transitions, 0 flow [2024-10-14 14:18:18,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-10-14 14:18:18,733 INFO L782 garLoopResultBuilder]: Registering result SAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2024-10-14 14:18:18,734 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 7 remaining) [2024-10-14 14:18:18,734 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2024-10-14 14:18:18,734 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2024-10-14 14:18:18,734 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2024-10-14 14:18:18,735 INFO L782 garLoopResultBuilder]: Registering result SAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-10-14 14:18:18,736 INFO L782 garLoopResultBuilder]: Registering result SAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-10-14 14:18:18,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-14 14:18:18,736 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2024-10-14 14:18:18,742 INFO L234 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-10-14 14:18:18,743 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-14 14:18:18,748 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 02:18:18 BasicIcfg [2024-10-14 14:18:18,748 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-14 14:18:18,749 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-14 14:18:18,749 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-14 14:18:18,750 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-14 14:18:18,750 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:18:12" (3/4) ... [2024-10-14 14:18:18,751 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-10-14 14:18:18,754 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure reader [2024-10-14 14:18:18,755 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure writer [2024-10-14 14:18:18,759 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 50 nodes and edges [2024-10-14 14:18:18,760 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-10-14 14:18:18,760 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-10-14 14:18:18,761 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-10-14 14:18:18,841 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-10-14 14:18:18,842 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-10-14 14:18:18,842 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-14 14:18:18,842 INFO L158 Benchmark]: Toolchain (without parser) took 7330.40ms. Allocated memory was 153.1MB in the beginning and 700.4MB in the end (delta: 547.4MB). Free memory was 103.8MB in the beginning and 291.5MB in the end (delta: -187.7MB). Peak memory consumption was 361.2MB. Max. memory is 16.1GB. [2024-10-14 14:18:18,843 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 153.1MB. Free memory was 119.1MB in the beginning and 119.0MB in the end (delta: 140.2kB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 14:18:18,843 INFO L158 Benchmark]: CACSL2BoogieTranslator took 480.78ms. Allocated memory is still 153.1MB. Free memory was 103.8MB in the beginning and 82.2MB in the end (delta: 21.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-10-14 14:18:18,843 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.55ms. Allocated memory is still 153.1MB. Free memory was 82.2MB in the beginning and 80.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-14 14:18:18,844 INFO L158 Benchmark]: Boogie Preprocessor took 45.13ms. Allocated memory is still 153.1MB. Free memory was 80.2MB in the beginning and 78.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-14 14:18:18,844 INFO L158 Benchmark]: RCFGBuilder took 551.44ms. Allocated memory is still 153.1MB. Free memory was 78.1MB in the beginning and 50.3MB in the end (delta: 27.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-10-14 14:18:18,844 INFO L158 Benchmark]: TraceAbstraction took 6073.72ms. Allocated memory was 153.1MB in the beginning and 700.4MB in the end (delta: 547.4MB). Free memory was 122.0MB in the beginning and 296.7MB in the end (delta: -174.8MB). Peak memory consumption was 371.4MB. Max. memory is 16.1GB. [2024-10-14 14:18:18,845 INFO L158 Benchmark]: Witness Printer took 93.17ms. Allocated memory is still 700.4MB. Free memory was 296.7MB in the beginning and 291.5MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-10-14 14:18:18,846 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 153.1MB. Free memory was 119.1MB in the beginning and 119.0MB in the end (delta: 140.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 480.78ms. Allocated memory is still 153.1MB. Free memory was 103.8MB in the beginning and 82.2MB in the end (delta: 21.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.55ms. Allocated memory is still 153.1MB. Free memory was 82.2MB in the beginning and 80.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.13ms. Allocated memory is still 153.1MB. Free memory was 80.2MB in the beginning and 78.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 551.44ms. Allocated memory is still 153.1MB. Free memory was 78.1MB in the beginning and 50.3MB in the end (delta: 27.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * TraceAbstraction took 6073.72ms. Allocated memory was 153.1MB in the beginning and 700.4MB in the end (delta: 547.4MB). Free memory was 122.0MB in the beginning and 296.7MB in the end (delta: -174.8MB). Peak memory consumption was 371.4MB. Max. memory is 16.1GB. * Witness Printer took 93.17ms. Allocated memory is still 700.4MB. Free memory was 296.7MB in the beginning and 291.5MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 710]: 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 7 procedures, 76 locations, 7 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: 6.0s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 392 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 359 mSDsluCounter, 114 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 89 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1042 IncrementalHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 25 mSDtfsCounter, 1042 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=302occurred in iteration=1, InterpolantAutomatonStates: 45, 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, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 100 ConstructedInterpolants, 0 QuantifiedInterpolants, 201 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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! [2024-10-14 14:18:18,876 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