./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/fib_unsafe-5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/pthread/fib_unsafe-5.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 e0f90189cbea201dcd094fc9e84327a00ade17017ada90c5df84c8712afaf176 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 01:26:14,349 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 01:26:14,426 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 01:26:14,432 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 01:26:14,435 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 01:26:14,466 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 01:26:14,467 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 01:26:14,467 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 01:26:14,468 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 01:26:14,469 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 01:26:14,469 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 01:26:14,470 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 01:26:14,470 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 01:26:14,471 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 01:26:14,472 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 01:26:14,473 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 01:26:14,473 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 01:26:14,474 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 01:26:14,474 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 01:26:14,474 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 01:26:14,474 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 01:26:14,475 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 01:26:14,475 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 01:26:14,476 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 01:26:14,476 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 01:26:14,476 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 01:26:14,477 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 01:26:14,477 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 01:26:14,480 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 01:26:14,481 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 01:26:14,481 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 01:26:14,481 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 01:26:14,481 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:26:14,492 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 01:26:14,492 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 01:26:14,492 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 01:26:14,493 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 01:26:14,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 01:26:14,493 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 01:26:14,493 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 01:26:14,493 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 01:26:14,494 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 01:26:14,494 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0f90189cbea201dcd094fc9e84327a00ade17017ada90c5df84c8712afaf176 [2024-11-19 01:26:14,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 01:26:14,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 01:26:14,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 01:26:14,804 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 01:26:14,804 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 01:26:14,805 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_unsafe-5.i [2024-11-19 01:26:16,313 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 01:26:16,598 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 01:26:16,599 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_unsafe-5.i [2024-11-19 01:26:16,614 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b993dba1e/72d20f6bb52e484c9859b1c588d9a711/FLAGffbe5a36c [2024-11-19 01:26:16,629 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b993dba1e/72d20f6bb52e484c9859b1c588d9a711 [2024-11-19 01:26:16,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 01:26:16,634 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 01:26:16,636 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 01:26:16,636 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 01:26:16,641 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 01:26:16,641 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:26:16" (1/1) ... [2024-11-19 01:26:16,644 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@91a292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:16, skipping insertion in model container [2024-11-19 01:26:16,644 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:26:16" (1/1) ... [2024-11-19 01:26:16,692 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 01:26:17,002 WARN L250 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/fib_unsafe-5.i[30243,30256] [2024-11-19 01:26:17,027 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:26:17,038 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 01:26:17,092 WARN L250 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/fib_unsafe-5.i[30243,30256] [2024-11-19 01:26:17,101 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:26:17,139 INFO L204 MainTranslator]: Completed translation [2024-11-19 01:26:17,139 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:17 WrapperNode [2024-11-19 01:26:17,140 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 01:26:17,141 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 01:26:17,141 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 01:26:17,141 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 01:26:17,148 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:17" (1/1) ... [2024-11-19 01:26:17,164 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:17" (1/1) ... [2024-11-19 01:26:17,189 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2024-11-19 01:26:17,191 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 01:26:17,192 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 01:26:17,192 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 01:26:17,192 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 01:26:17,202 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:17" (1/1) ... [2024-11-19 01:26:17,202 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:17" (1/1) ... [2024-11-19 01:26:17,204 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:17" (1/1) ... [2024-11-19 01:26:17,226 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-19 01:26:17,226 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:17" (1/1) ... [2024-11-19 01:26:17,226 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:17" (1/1) ... [2024-11-19 01:26:17,235 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:17" (1/1) ... [2024-11-19 01:26:17,243 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:17" (1/1) ... [2024-11-19 01:26:17,244 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:17" (1/1) ... [2024-11-19 01:26:17,247 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:17" (1/1) ... [2024-11-19 01:26:17,249 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 01:26:17,250 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 01:26:17,250 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 01:26:17,251 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 01:26:17,251 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:17" (1/1) ... [2024-11-19 01:26:17,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:26:17,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:26:17,289 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) [2024-11-19 01:26:17,295 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 [2024-11-19 01:26:17,361 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-19 01:26:17,362 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-19 01:26:17,362 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-19 01:26:17,362 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-19 01:26:17,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-19 01:26:17,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 01:26:17,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 01:26:17,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-19 01:26:17,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 01:26:17,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 01:26:17,368 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 01:26:17,491 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 01:26:17,493 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 01:26:17,647 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 01:26:17,647 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 01:26:17,760 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 01:26:17,760 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 01:26:17,760 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:26:17 BoogieIcfgContainer [2024-11-19 01:26:17,760 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 01:26:17,764 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 01:26:17,765 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 01:26:17,768 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 01:26:17,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:26:16" (1/3) ... [2024-11-19 01:26:17,769 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9731d4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:26:17, skipping insertion in model container [2024-11-19 01:26:17,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:17" (2/3) ... [2024-11-19 01:26:17,771 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9731d4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:26:17, skipping insertion in model container [2024-11-19 01:26:17,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:26:17" (3/3) ... [2024-11-19 01:26:17,773 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-5.i [2024-11-19 01:26:17,791 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 01:26:17,792 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 01:26:17,793 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 01:26:17,832 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-19 01:26:17,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2024-11-19 01:26:17,899 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-11-19 01:26:17,899 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 01:26:17,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-11-19 01:26:17,908 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2024-11-19 01:26:17,910 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2024-11-19 01:26:17,925 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:26:17,933 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;@646c4952, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:26:17,934 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-19 01:26:17,944 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:26:17,944 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2024-11-19 01:26:17,944 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 01:26:17,945 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:26:17,945 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:26:17,946 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:26:17,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:26:17,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1327058361, now seen corresponding path program 1 times [2024-11-19 01:26:17,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:26:17,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470792322] [2024-11-19 01:26:17,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:26:17,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:26:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:26:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:18,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:26:18,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470792322] [2024-11-19 01:26:18,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470792322] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:26:18,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:26:18,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:26:18,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754510812] [2024-11-19 01:26:18,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:26:18,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 01:26:18,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:26:18,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 01:26:18,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 01:26:18,274 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-11-19 01:26:18,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2024-11-19 01:26:18,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:26:18,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-11-19 01:26:18,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:26:18,383 INFO L124 PetriNetUnfolderBase]: 115/223 cut-off events. [2024-11-19 01:26:18,384 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-19 01:26:18,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 223 events. 115/223 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 691 event pairs, 20 based on Foata normal form. 9/209 useless extension candidates. Maximal degree in co-relation 398. Up to 118 conditions per place. [2024-11-19 01:26:18,389 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 20 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2024-11-19 01:26:18,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 118 flow [2024-11-19 01:26:18,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 01:26:18,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 01:26:18,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-11-19 01:26:18,402 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2024-11-19 01:26:18,405 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 60 flow. Second operand 3 states and 61 transitions. [2024-11-19 01:26:18,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 118 flow [2024-11-19 01:26:18,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 116 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 01:26:18,414 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 66 flow [2024-11-19 01:26:18,416 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2024-11-19 01:26:18,421 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-11-19 01:26:18,422 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 66 flow [2024-11-19 01:26:18,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2024-11-19 01:26:18,422 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:26:18,422 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:26:18,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 01:26:18,424 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:26:18,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:26:18,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1785420741, now seen corresponding path program 1 times [2024-11-19 01:26:18,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:26:18,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196376499] [2024-11-19 01:26:18,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:26:18,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:26:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:26:18,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:18,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:26:18,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196376499] [2024-11-19 01:26:18,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196376499] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:26:18,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003631256] [2024-11-19 01:26:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:26:18,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:26:18,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:26:18,606 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:26:18,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 01:26:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:26:18,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-19 01:26:18,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:26:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:18,758 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:26:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:18,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003631256] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:26:18,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:26:18,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-19 01:26:18,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469930902] [2024-11-19 01:26:18,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:26:18,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 01:26:18,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:26:18,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 01:26:18,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-19 01:26:18,792 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-11-19 01:26:18,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:26:18,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:26:18,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-11-19 01:26:18,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:26:18,942 INFO L124 PetriNetUnfolderBase]: 151/277 cut-off events. [2024-11-19 01:26:18,946 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 01:26:18,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 277 events. 151/277 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 799 event pairs, 20 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 569. Up to 91 conditions per place. [2024-11-19 01:26:18,951 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 38 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-11-19 01:26:18,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 53 transitions, 212 flow [2024-11-19 01:26:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 01:26:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 01:26:18,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-11-19 01:26:18,954 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6781609195402298 [2024-11-19 01:26:18,955 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 66 flow. Second operand 6 states and 118 transitions. [2024-11-19 01:26:18,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 53 transitions, 212 flow [2024-11-19 01:26:18,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 53 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 01:26:18,958 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 100 flow [2024-11-19 01:26:18,958 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2024-11-19 01:26:18,959 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-11-19 01:26:18,960 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 100 flow [2024-11-19 01:26:18,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:26:18,960 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:26:18,960 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:26:18,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 01:26:19,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:26:19,162 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:26:19,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:26:19,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1099178439, now seen corresponding path program 2 times [2024-11-19 01:26:19,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:26:19,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118347567] [2024-11-19 01:26:19,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:26:19,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:26:19,200 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:26:19,201 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:26:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:19,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:26:19,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118347567] [2024-11-19 01:26:19,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118347567] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:26:19,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121965493] [2024-11-19 01:26:19,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:26:19,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:26:19,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:26:19,337 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:26:19,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 01:26:19,425 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:26:19,426 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:26:19,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:26:19,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:26:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:19,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:26:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:19,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121965493] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:26:19,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:26:19,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-19 01:26:19,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19972985] [2024-11-19 01:26:19,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:26:19,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 01:26:19,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:26:19,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 01:26:19,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-19 01:26:19,519 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-11-19 01:26:19,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 100 flow. Second operand has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 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) [2024-11-19 01:26:19,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:26:19,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-11-19 01:26:19,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:26:19,710 INFO L124 PetriNetUnfolderBase]: 259/439 cut-off events. [2024-11-19 01:26:19,711 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2024-11-19 01:26:19,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1110 conditions, 439 events. 259/439 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1196 event pairs, 20 based on Foata normal form. 54/479 useless extension candidates. Maximal degree in co-relation 1091. Up to 109 conditions per place. [2024-11-19 01:26:19,725 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 74 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-11-19 01:26:19,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 95 transitions, 426 flow [2024-11-19 01:26:19,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 01:26:19,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 01:26:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 235 transitions. [2024-11-19 01:26:19,731 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6752873563218391 [2024-11-19 01:26:19,731 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 100 flow. Second operand 12 states and 235 transitions. [2024-11-19 01:26:19,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 95 transitions, 426 flow [2024-11-19 01:26:19,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 95 transitions, 412 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-19 01:26:19,736 INFO L231 Difference]: Finished difference. Result has 53 places, 35 transitions, 170 flow [2024-11-19 01:26:19,758 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=35} [2024-11-19 01:26:19,763 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2024-11-19 01:26:19,763 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 170 flow [2024-11-19 01:26:19,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 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) [2024-11-19 01:26:19,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:26:19,764 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:26:19,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 01:26:19,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-19 01:26:19,965 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:26:19,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:26:19,966 INFO L85 PathProgramCache]: Analyzing trace with hash -299417337, now seen corresponding path program 3 times [2024-11-19 01:26:19,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:26:19,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668184710] [2024-11-19 01:26:19,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:26:19,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:26:20,026 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-19 01:26:20,027 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:26:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:20,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:26:20,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668184710] [2024-11-19 01:26:20,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668184710] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:26:20,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112714110] [2024-11-19 01:26:20,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:26:20,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:26:20,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:26:20,240 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:26:20,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 01:26:20,324 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-19 01:26:20,325 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:26:20,327 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 01:26:20,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:26:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:20,382 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:26:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:20,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112714110] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:26:20,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:26:20,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2024-11-19 01:26:20,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353144694] [2024-11-19 01:26:20,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:26:20,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 01:26:20,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:26:20,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 01:26:20,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2024-11-19 01:26:20,514 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-11-19 01:26:20,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 35 transitions, 170 flow. Second operand has 15 states, 15 states have (on average 13.533333333333333) internal successors, (203), 15 states have internal predecessors, (203), 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) [2024-11-19 01:26:20,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:26:20,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-11-19 01:26:20,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:26:20,714 INFO L124 PetriNetUnfolderBase]: 295/493 cut-off events. [2024-11-19 01:26:20,715 INFO L125 PetriNetUnfolderBase]: For 963/963 co-relation queries the response was YES. [2024-11-19 01:26:20,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1432 conditions, 493 events. 295/493 cut-off events. For 963/963 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1333 event pairs, 20 based on Foata normal form. 18/497 useless extension candidates. Maximal degree in co-relation 1406. Up to 100 conditions per place. [2024-11-19 01:26:20,721 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 86 selfloop transitions, 13 changer transitions 0/109 dead transitions. [2024-11-19 01:26:20,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 109 transitions, 528 flow [2024-11-19 01:26:20,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 01:26:20,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 01:26:20,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 269 transitions. [2024-11-19 01:26:20,726 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6625615763546798 [2024-11-19 01:26:20,726 INFO L175 Difference]: Start difference. First operand has 53 places, 35 transitions, 170 flow. Second operand 14 states and 269 transitions. [2024-11-19 01:26:20,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 109 transitions, 528 flow [2024-11-19 01:26:20,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 109 transitions, 476 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-11-19 01:26:20,738 INFO L231 Difference]: Finished difference. Result has 63 places, 37 transitions, 170 flow [2024-11-19 01:26:20,738 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=170, PETRI_PLACES=63, PETRI_TRANSITIONS=37} [2024-11-19 01:26:20,739 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2024-11-19 01:26:20,740 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 37 transitions, 170 flow [2024-11-19 01:26:20,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 13.533333333333333) internal successors, (203), 15 states have internal predecessors, (203), 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) [2024-11-19 01:26:20,741 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:26:20,741 INFO L204 CegarLoopForPetriNet]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:26:20,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 01:26:20,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:26:20,942 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:26:20,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:26:20,943 INFO L85 PathProgramCache]: Analyzing trace with hash -791428921, now seen corresponding path program 4 times [2024-11-19 01:26:20,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:26:20,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774882533] [2024-11-19 01:26:20,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:26:20,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:26:20,985 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:26:20,989 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:26:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:21,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:26:21,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774882533] [2024-11-19 01:26:21,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774882533] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:26:21,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173278655] [2024-11-19 01:26:21,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:26:21,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:26:21,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:26:21,807 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:26:21,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 01:26:21,891 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:26:21,891 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:26:21,893 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-19 01:26:21,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:26:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:22,763 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:26:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:23,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173278655] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:26:23,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:26:23,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2024-11-19 01:26:23,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793324312] [2024-11-19 01:26:23,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:26:23,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-19 01:26:23,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:26:23,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-19 01:26:23,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=2700, Unknown=0, NotChecked=0, Total=3080 [2024-11-19 01:26:23,850 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-11-19 01:26:23,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 37 transitions, 170 flow. Second operand has 56 states, 56 states have (on average 6.285714285714286) internal successors, (352), 56 states have internal predecessors, (352), 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) [2024-11-19 01:26:23,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:26:23,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-11-19 01:26:23,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:26:38,576 INFO L124 PetriNetUnfolderBase]: 12265/20087 cut-off events. [2024-11-19 01:26:38,576 INFO L125 PetriNetUnfolderBase]: For 33872/33872 co-relation queries the response was YES. [2024-11-19 01:26:38,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51717 conditions, 20087 events. 12265/20087 cut-off events. For 33872/33872 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 127233 event pairs, 106 based on Foata normal form. 0/19801 useless extension candidates. Maximal degree in co-relation 51687. Up to 2550 conditions per place. [2024-11-19 01:26:38,699 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 493 selfloop transitions, 445 changer transitions 613/1554 dead transitions. [2024-11-19 01:26:38,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 1554 transitions, 8745 flow [2024-11-19 01:26:38,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2024-11-19 01:26:38,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2024-11-19 01:26:38,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 2037 transitions. [2024-11-19 01:26:38,707 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45909398242055444 [2024-11-19 01:26:38,707 INFO L175 Difference]: Start difference. First operand has 63 places, 37 transitions, 170 flow. Second operand 153 states and 2037 transitions. [2024-11-19 01:26:38,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 1554 transitions, 8745 flow [2024-11-19 01:26:38,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 1554 transitions, 7763 flow, removed 210 selfloop flow, removed 11 redundant places. [2024-11-19 01:26:38,836 INFO L231 Difference]: Finished difference. Result has 266 places, 526 transitions, 3168 flow [2024-11-19 01:26:38,838 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=153, PETRI_FLOW=3168, PETRI_PLACES=266, PETRI_TRANSITIONS=526} [2024-11-19 01:26:38,839 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 236 predicate places. [2024-11-19 01:26:38,840 INFO L471 AbstractCegarLoop]: Abstraction has has 266 places, 526 transitions, 3168 flow [2024-11-19 01:26:38,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 6.285714285714286) internal successors, (352), 56 states have internal predecessors, (352), 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) [2024-11-19 01:26:38,840 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:26:38,841 INFO L204 CegarLoopForPetriNet]: trace histogram [12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:26:38,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 01:26:39,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:26:39,046 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:26:39,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:26:39,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1313744985, now seen corresponding path program 1 times [2024-11-19 01:26:39,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:26:39,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931235228] [2024-11-19 01:26:39,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:26:39,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:26:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:26:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:39,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:26:39,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931235228] [2024-11-19 01:26:39,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931235228] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:26:39,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565249201] [2024-11-19 01:26:39,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:26:39,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:26:39,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:26:39,988 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:26:39,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 01:26:40,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:26:40,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-19 01:26:40,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:26:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 55 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:40,854 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:26:41,767 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:41,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565249201] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:26:41,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:26:41,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2024-11-19 01:26:41,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504308740] [2024-11-19 01:26:41,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:26:41,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-19 01:26:41,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:26:41,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-19 01:26:41,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=3348, Unknown=0, NotChecked=0, Total=3782 [2024-11-19 01:26:41,913 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-11-19 01:26:41,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 526 transitions, 3168 flow. Second operand has 62 states, 62 states have (on average 6.354838709677419) internal successors, (394), 62 states have internal predecessors, (394), 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) [2024-11-19 01:26:41,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:26:41,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-11-19 01:26:41,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand