./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d 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/weaver/popl20-queue-add-2.wvr.c -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 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 07:15:29,565 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 07:15:29,608 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 07:15:29,611 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 07:15:29,611 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 07:15:29,629 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 07:15:29,630 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 07:15:29,630 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 07:15:29,631 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 07:15:29,631 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 07:15:29,631 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 07:15:29,631 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 07:15:29,632 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 07:15:29,632 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 07:15:29,632 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 07:15:29,633 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 07:15:29,633 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 07:15:29,633 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 07:15:29,633 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 07:15:29,634 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 07:15:29,634 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 07:15:29,637 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 07:15:29,638 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 07:15:29,638 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 07:15:29,638 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 07:15:29,638 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 07:15:29,639 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 07:15:29,639 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 07:15:29,639 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 07:15:29,639 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 07:15:29,640 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 07:15:29,640 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 07:15:29,640 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:15:29,641 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 07:15:29,641 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 07:15:29,641 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 07:15:29,641 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 07:15:29,641 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 07:15:29,642 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 07:15:29,643 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 07:15:29,643 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 07:15:29,643 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 07:15:29,643 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e [2024-10-13 07:15:29,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 07:15:29,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 07:15:29,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 07:15:29,859 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 07:15:29,859 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 07:15:29,860 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2024-10-13 07:15:31,086 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 07:15:31,238 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 07:15:31,239 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2024-10-13 07:15:31,244 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c23520c1/8e766c1a3bb8461885647119a3d43cbf/FLAG2e945ca39 [2024-10-13 07:15:31,255 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c23520c1/8e766c1a3bb8461885647119a3d43cbf [2024-10-13 07:15:31,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 07:15:31,257 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 07:15:31,259 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 07:15:31,259 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 07:15:31,262 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 07:15:31,263 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:31" (1/1) ... [2024-10-13 07:15:31,263 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56e5d609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:31, skipping insertion in model container [2024-10-13 07:15:31,263 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:31" (1/1) ... [2024-10-13 07:15:31,282 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 07:15:31,444 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/weaver/popl20-queue-add-2.wvr.c[2722,2735] [2024-10-13 07:15:31,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:15:31,467 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 07:15:31,487 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/weaver/popl20-queue-add-2.wvr.c[2722,2735] [2024-10-13 07:15:31,491 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:15:31,504 INFO L204 MainTranslator]: Completed translation [2024-10-13 07:15:31,504 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:31 WrapperNode [2024-10-13 07:15:31,504 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 07:15:31,505 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 07:15:31,505 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 07:15:31,505 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 07:15:31,510 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:31" (1/1) ... [2024-10-13 07:15:31,516 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:31" (1/1) ... [2024-10-13 07:15:31,535 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 149 [2024-10-13 07:15:31,535 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 07:15:31,536 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 07:15:31,536 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 07:15:31,536 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 07:15:31,546 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:31" (1/1) ... [2024-10-13 07:15:31,546 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:31" (1/1) ... [2024-10-13 07:15:31,548 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:31" (1/1) ... [2024-10-13 07:15:31,566 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-13 07:15:31,566 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:31" (1/1) ... [2024-10-13 07:15:31,566 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:31" (1/1) ... [2024-10-13 07:15:31,571 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:31" (1/1) ... [2024-10-13 07:15:31,573 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:31" (1/1) ... [2024-10-13 07:15:31,574 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:31" (1/1) ... [2024-10-13 07:15:31,575 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:31" (1/1) ... [2024-10-13 07:15:31,576 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 07:15:31,577 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 07:15:31,577 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 07:15:31,577 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 07:15:31,578 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:31" (1/1) ... [2024-10-13 07:15:31,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:15:31,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:31,615 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) [2024-10-13 07:15:31,617 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 [2024-10-13 07:15:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 07:15:31,655 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 07:15:31,656 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 07:15:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 07:15:31,656 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 07:15:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 07:15:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 07:15:31,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 07:15:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 07:15:31,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-13 07:15:31,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-13 07:15:31,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 07:15:31,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 07:15:31,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 07:15:31,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 07:15:31,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 07:15:31,660 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 07:15:31,755 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 07:15:31,758 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 07:15:32,016 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 07:15:32,016 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 07:15:32,178 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 07:15:32,179 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-13 07:15:32,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:32 BoogieIcfgContainer [2024-10-13 07:15:32,179 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 07:15:32,182 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 07:15:32,182 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 07:15:32,185 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 07:15:32,185 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:15:31" (1/3) ... [2024-10-13 07:15:32,186 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a1214f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:32, skipping insertion in model container [2024-10-13 07:15:32,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:31" (2/3) ... [2024-10-13 07:15:32,187 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a1214f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:32, skipping insertion in model container [2024-10-13 07:15:32,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:32" (3/3) ... [2024-10-13 07:15:32,189 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2024-10-13 07:15:32,201 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 07:15:32,201 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 07:15:32,201 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 07:15:32,234 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-13 07:15:32,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 72 flow [2024-10-13 07:15:32,287 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-10-13 07:15:32,287 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:15:32,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 4/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-10-13 07:15:32,290 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 72 flow [2024-10-13 07:15:32,292 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 26 transitions, 64 flow [2024-10-13 07:15:32,300 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 07:15:32,306 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;@3bc8c49f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 07:15:32,306 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-13 07:15:32,320 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 07:15:32,320 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2024-10-13 07:15:32,320 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:15:32,320 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:32,321 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:32,321 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:32,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:32,326 INFO L85 PathProgramCache]: Analyzing trace with hash 898408006, now seen corresponding path program 1 times [2024-10-13 07:15:32,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:32,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876811690] [2024-10-13 07:15:32,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:32,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:32,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:32,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876811690] [2024-10-13 07:15:32,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876811690] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:15:32,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:15:32,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:15:32,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26343758] [2024-10-13 07:15:32,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:15:32,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 07:15:32,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:32,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 07:15:32,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 07:15:32,534 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-10-13 07:15:32,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 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) [2024-10-13 07:15:32,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:32,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-10-13 07:15:32,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:32,614 INFO L124 PetriNetUnfolderBase]: 87/187 cut-off events. [2024-10-13 07:15:32,615 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-13 07:15:32,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 187 events. 87/187 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 646 event pairs, 66 based on Foata normal form. 13/183 useless extension candidates. Maximal degree in co-relation 317. Up to 146 conditions per place. [2024-10-13 07:15:32,620 INFO L140 encePairwiseOnDemand]: 28/29 looper letters, 19 selfloop transitions, 0 changer transitions 0/25 dead transitions. [2024-10-13 07:15:32,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 25 transitions, 100 flow [2024-10-13 07:15:32,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 07:15:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-13 07:15:32,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 36 transitions. [2024-10-13 07:15:32,630 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2024-10-13 07:15:32,632 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 64 flow. Second operand 2 states and 36 transitions. [2024-10-13 07:15:32,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 25 transitions, 100 flow [2024-10-13 07:15:32,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 92 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 07:15:32,637 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 54 flow [2024-10-13 07:15:32,638 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=54, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2024-10-13 07:15:32,641 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2024-10-13 07:15:32,643 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 54 flow [2024-10-13 07:15:32,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.0) internal successors, (32), 2 states have internal predecessors, (32), 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) [2024-10-13 07:15:32,643 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:32,644 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] [2024-10-13 07:15:32,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 07:15:32,644 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:32,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:32,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1095861289, now seen corresponding path program 1 times [2024-10-13 07:15:32,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:32,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068711205] [2024-10-13 07:15:32,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:32,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:32,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:32,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068711205] [2024-10-13 07:15:32,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068711205] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:15:32,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:15:32,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:15:32,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246656741] [2024-10-13 07:15:32,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:15:32,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:15:32,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:32,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:15:32,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:15:32,885 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-10-13 07:15:32,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2024-10-13 07:15:32,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:32,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-10-13 07:15:32,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:32,990 INFO L124 PetriNetUnfolderBase]: 100/227 cut-off events. [2024-10-13 07:15:32,990 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 07:15:32,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 227 events. 100/227 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 832 event pairs, 79 based on Foata normal form. 17/228 useless extension candidates. Maximal degree in co-relation 416. Up to 146 conditions per place. [2024-10-13 07:15:32,992 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 18 selfloop transitions, 2 changer transitions 8/34 dead transitions. [2024-10-13 07:15:32,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 130 flow [2024-10-13 07:15:32,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:15:32,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:15:32,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-10-13 07:15:32,994 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5431034482758621 [2024-10-13 07:15:32,994 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 54 flow. Second operand 4 states and 63 transitions. [2024-10-13 07:15:32,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 130 flow [2024-10-13 07:15:32,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 34 transitions, 130 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 07:15:32,996 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 72 flow [2024-10-13 07:15:32,996 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=72, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2024-10-13 07:15:32,996 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2024-10-13 07:15:32,996 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 72 flow [2024-10-13 07:15:32,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2024-10-13 07:15:32,997 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:32,997 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] [2024-10-13 07:15:32,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 07:15:32,997 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:32,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:32,998 INFO L85 PathProgramCache]: Analyzing trace with hash -798163703, now seen corresponding path program 1 times [2024-10-13 07:15:32,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:32,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026822990] [2024-10-13 07:15:32,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:32,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:33,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:33,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026822990] [2024-10-13 07:15:33,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026822990] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:15:33,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:15:33,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-13 07:15:33,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870899340] [2024-10-13 07:15:33,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:15:33,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 07:15:33,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:33,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 07:15:33,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-10-13 07:15:33,195 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-10-13 07:15:33,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 72 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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) [2024-10-13 07:15:33,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:33,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-10-13 07:15:33,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:33,359 INFO L124 PetriNetUnfolderBase]: 229/444 cut-off events. [2024-10-13 07:15:33,359 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-10-13 07:15:33,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 967 conditions, 444 events. 229/444 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1986 event pairs, 54 based on Foata normal form. 1/441 useless extension candidates. Maximal degree in co-relation 961. Up to 155 conditions per place. [2024-10-13 07:15:33,365 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 46 selfloop transitions, 9 changer transitions 7/66 dead transitions. [2024-10-13 07:15:33,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 66 transitions, 303 flow [2024-10-13 07:15:33,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 07:15:33,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 07:15:33,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 110 transitions. [2024-10-13 07:15:33,367 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47413793103448276 [2024-10-13 07:15:33,367 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 72 flow. Second operand 8 states and 110 transitions. [2024-10-13 07:15:33,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 66 transitions, 303 flow [2024-10-13 07:15:33,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 66 transitions, 299 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-13 07:15:33,369 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 126 flow [2024-10-13 07:15:33,371 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=68, 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=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=126, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2024-10-13 07:15:33,372 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 11 predicate places. [2024-10-13 07:15:33,372 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 126 flow [2024-10-13 07:15:33,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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) [2024-10-13 07:15:33,372 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:33,373 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] [2024-10-13 07:15:33,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 07:15:33,373 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:33,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:33,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1929446763, now seen corresponding path program 2 times [2024-10-13 07:15:33,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:33,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212160187] [2024-10-13 07:15:33,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:33,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:33,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:33,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212160187] [2024-10-13 07:15:33,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212160187] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:15:33,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:15:33,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:15:33,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831479578] [2024-10-13 07:15:33,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:15:33,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:15:33,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:33,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:15:33,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:15:33,438 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-10-13 07:15:33,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:33,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:33,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-10-13 07:15:33,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:33,497 INFO L124 PetriNetUnfolderBase]: 145/326 cut-off events. [2024-10-13 07:15:33,499 INFO L125 PetriNetUnfolderBase]: For 182/186 co-relation queries the response was YES. [2024-10-13 07:15:33,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 326 events. 145/326 cut-off events. For 182/186 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1327 event pairs, 39 based on Foata normal form. 6/328 useless extension candidates. Maximal degree in co-relation 815. Up to 214 conditions per place. [2024-10-13 07:15:33,502 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 26 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2024-10-13 07:15:33,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 197 flow [2024-10-13 07:15:33,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:15:33,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:15:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-10-13 07:15:33,504 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2024-10-13 07:15:33,504 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 126 flow. Second operand 3 states and 51 transitions. [2024-10-13 07:15:33,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 197 flow [2024-10-13 07:15:33,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 187 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-13 07:15:33,509 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 135 flow [2024-10-13 07:15:33,509 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2024-10-13 07:15:33,509 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 10 predicate places. [2024-10-13 07:15:33,510 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 135 flow [2024-10-13 07:15:33,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:33,510 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:33,511 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, 1, 1] [2024-10-13 07:15:33,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 07:15:33,511 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:33,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:33,513 INFO L85 PathProgramCache]: Analyzing trace with hash -126642015, now seen corresponding path program 1 times [2024-10-13 07:15:33,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:33,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407093400] [2024-10-13 07:15:33,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:33,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:33,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:33,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407093400] [2024-10-13 07:15:33,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407093400] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:33,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149534194] [2024-10-13 07:15:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:33,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:33,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:33,656 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) [2024-10-13 07:15:33,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 07:15:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:33,725 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 07:15:33,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:33,816 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:33,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149534194] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:33,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:33,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-13 07:15:33,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666359096] [2024-10-13 07:15:33,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:33,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-13 07:15:33,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:33,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-13 07:15:33,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-10-13 07:15:33,911 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-10-13 07:15:33,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 135 flow. Second operand has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 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) [2024-10-13 07:15:33,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:33,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-10-13 07:15:33,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:34,027 INFO L124 PetriNetUnfolderBase]: 244/562 cut-off events. [2024-10-13 07:15:34,028 INFO L125 PetriNetUnfolderBase]: For 558/597 co-relation queries the response was YES. [2024-10-13 07:15:34,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1515 conditions, 562 events. 244/562 cut-off events. For 558/597 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2830 event pairs, 137 based on Foata normal form. 26/560 useless extension candidates. Maximal degree in co-relation 1505. Up to 262 conditions per place. [2024-10-13 07:15:34,031 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 41 selfloop transitions, 5 changer transitions 4/59 dead transitions. [2024-10-13 07:15:34,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 59 transitions, 327 flow [2024-10-13 07:15:34,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:15:34,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:15:34,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-10-13 07:15:34,033 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5344827586206896 [2024-10-13 07:15:34,033 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 135 flow. Second operand 6 states and 93 transitions. [2024-10-13 07:15:34,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 59 transitions, 327 flow [2024-10-13 07:15:34,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 59 transitions, 306 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-10-13 07:15:34,036 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 163 flow [2024-10-13 07:15:34,036 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2024-10-13 07:15:34,037 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 16 predicate places. [2024-10-13 07:15:34,037 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 163 flow [2024-10-13 07:15:34,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 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) [2024-10-13 07:15:34,037 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:34,038 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:34,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-13 07:15:34,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:34,239 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:34,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:34,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1356069503, now seen corresponding path program 2 times [2024-10-13 07:15:34,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:34,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418248259] [2024-10-13 07:15:34,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:34,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:34,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:34,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418248259] [2024-10-13 07:15:34,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418248259] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:34,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115121603] [2024-10-13 07:15:34,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:15:34,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:34,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:34,781 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) [2024-10-13 07:15:34,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 07:15:34,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:15:34,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:34,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-13 07:15:34,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:35,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-10-13 07:15:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:35,065 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:35,207 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 07:15:35,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-10-13 07:15:35,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:35,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115121603] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:35,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:35,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 21 [2024-10-13 07:15:35,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228914052] [2024-10-13 07:15:35,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:35,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 07:15:35,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:35,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 07:15:35,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2024-10-13 07:15:35,423 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-10-13 07:15:35,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 163 flow. Second operand has 22 states, 22 states have (on average 8.5) internal successors, (187), 22 states have internal predecessors, (187), 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) [2024-10-13 07:15:35,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:35,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-10-13 07:15:35,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:36,484 INFO L124 PetriNetUnfolderBase]: 745/1590 cut-off events. [2024-10-13 07:15:36,484 INFO L125 PetriNetUnfolderBase]: For 1144/1147 co-relation queries the response was YES. [2024-10-13 07:15:36,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4054 conditions, 1590 events. 745/1590 cut-off events. For 1144/1147 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9480 event pairs, 65 based on Foata normal form. 78/1662 useless extension candidates. Maximal degree in co-relation 4042. Up to 294 conditions per place. [2024-10-13 07:15:36,493 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 157 selfloop transitions, 39 changer transitions 16/219 dead transitions. [2024-10-13 07:15:36,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 219 transitions, 1224 flow [2024-10-13 07:15:36,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-13 07:15:36,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-13 07:15:36,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 391 transitions. [2024-10-13 07:15:36,495 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4815270935960591 [2024-10-13 07:15:36,495 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 163 flow. Second operand 28 states and 391 transitions. [2024-10-13 07:15:36,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 219 transitions, 1224 flow [2024-10-13 07:15:36,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 219 transitions, 1173 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-10-13 07:15:36,501 INFO L231 Difference]: Finished difference. Result has 81 places, 74 transitions, 504 flow [2024-10-13 07:15:36,501 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=504, PETRI_PLACES=81, PETRI_TRANSITIONS=74} [2024-10-13 07:15:36,501 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 52 predicate places. [2024-10-13 07:15:36,501 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 74 transitions, 504 flow [2024-10-13 07:15:36,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.5) internal successors, (187), 22 states have internal predecessors, (187), 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) [2024-10-13 07:15:36,502 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:36,502 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:36,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 07:15:36,706 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,SelfDestructingSolverStorable5 [2024-10-13 07:15:36,707 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:36,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:36,708 INFO L85 PathProgramCache]: Analyzing trace with hash -623450337, now seen corresponding path program 1 times [2024-10-13 07:15:36,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:36,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283792745] [2024-10-13 07:15:36,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:36,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:36,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:36,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283792745] [2024-10-13 07:15:36,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283792745] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:36,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234772581] [2024-10-13 07:15:36,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:36,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:36,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:36,806 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) [2024-10-13 07:15:36,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 07:15:36,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:36,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 07:15:36,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:36,889 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 07:15:36,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234772581] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:15:36,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 07:15:36,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-10-13 07:15:36,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343172463] [2024-10-13 07:15:36,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:15:36,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:15:36,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:36,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:15:36,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-13 07:15:36,890 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-10-13 07:15:36,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 74 transitions, 504 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2024-10-13 07:15:36,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:36,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-10-13 07:15:36,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:37,034 INFO L124 PetriNetUnfolderBase]: 599/1528 cut-off events. [2024-10-13 07:15:37,034 INFO L125 PetriNetUnfolderBase]: For 5891/5974 co-relation queries the response was YES. [2024-10-13 07:15:37,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4832 conditions, 1528 events. 599/1528 cut-off events. For 5891/5974 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 10262 event pairs, 150 based on Foata normal form. 39/1529 useless extension candidates. Maximal degree in co-relation 4809. Up to 609 conditions per place. [2024-10-13 07:15:37,044 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 63 selfloop transitions, 16 changer transitions 8/102 dead transitions. [2024-10-13 07:15:37,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 102 transitions, 837 flow [2024-10-13 07:15:37,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:15:37,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:15:37,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2024-10-13 07:15:37,045 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6810344827586207 [2024-10-13 07:15:37,045 INFO L175 Difference]: Start difference. First operand has 81 places, 74 transitions, 504 flow. Second operand 4 states and 79 transitions. [2024-10-13 07:15:37,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 102 transitions, 837 flow [2024-10-13 07:15:37,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 102 transitions, 698 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-10-13 07:15:37,056 INFO L231 Difference]: Finished difference. Result has 77 places, 71 transitions, 489 flow [2024-10-13 07:15:37,056 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=489, PETRI_PLACES=77, PETRI_TRANSITIONS=71} [2024-10-13 07:15:37,056 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 48 predicate places. [2024-10-13 07:15:37,057 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 71 transitions, 489 flow [2024-10-13 07:15:37,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2024-10-13 07:15:37,057 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:37,057 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:37,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 07:15:37,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:37,258 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:37,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:37,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1175512711, now seen corresponding path program 3 times [2024-10-13 07:15:37,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:37,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715591941] [2024-10-13 07:15:37,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:37,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:37,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:37,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715591941] [2024-10-13 07:15:37,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715591941] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:37,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031281754] [2024-10-13 07:15:37,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:15:37,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:37,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:37,606 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) [2024-10-13 07:15:37,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 07:15:37,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 07:15:37,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:37,665 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-13 07:15:37,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:37,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:37,966 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 07:15:37,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-10-13 07:15:38,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:38,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031281754] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:38,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:38,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-10-13 07:15:38,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762790345] [2024-10-13 07:15:38,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:38,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 07:15:38,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:38,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 07:15:38,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-10-13 07:15:38,180 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-10-13 07:15:38,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 489 flow. Second operand has 22 states, 22 states have (on average 8.454545454545455) internal successors, (186), 22 states have internal predecessors, (186), 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) [2024-10-13 07:15:38,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:38,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-10-13 07:15:38,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:39,002 INFO L124 PetriNetUnfolderBase]: 1228/2529 cut-off events. [2024-10-13 07:15:39,003 INFO L125 PetriNetUnfolderBase]: For 13199/13199 co-relation queries the response was YES. [2024-10-13 07:15:39,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8764 conditions, 2529 events. 1228/2529 cut-off events. For 13199/13199 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 16215 event pairs, 120 based on Foata normal form. 93/2605 useless extension candidates. Maximal degree in co-relation 8743. Up to 546 conditions per place. [2024-10-13 07:15:39,020 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 142 selfloop transitions, 62 changer transitions 1/211 dead transitions. [2024-10-13 07:15:39,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 211 transitions, 1889 flow [2024-10-13 07:15:39,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-13 07:15:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-13 07:15:39,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 282 transitions. [2024-10-13 07:15:39,023 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4862068965517241 [2024-10-13 07:15:39,023 INFO L175 Difference]: Start difference. First operand has 77 places, 71 transitions, 489 flow. Second operand 20 states and 282 transitions. [2024-10-13 07:15:39,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 211 transitions, 1889 flow [2024-10-13 07:15:39,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 211 transitions, 1647 flow, removed 121 selfloop flow, removed 3 redundant places. [2024-10-13 07:15:39,044 INFO L231 Difference]: Finished difference. Result has 97 places, 103 transitions, 1020 flow [2024-10-13 07:15:39,045 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1020, PETRI_PLACES=97, PETRI_TRANSITIONS=103} [2024-10-13 07:15:39,047 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 68 predicate places. [2024-10-13 07:15:39,048 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 103 transitions, 1020 flow [2024-10-13 07:15:39,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.454545454545455) internal successors, (186), 22 states have internal predecessors, (186), 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) [2024-10-13 07:15:39,048 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:39,048 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:39,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-13 07:15:39,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:39,249 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:39,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:39,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1810261713, now seen corresponding path program 4 times [2024-10-13 07:15:39,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:39,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030143234] [2024-10-13 07:15:39,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:39,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:39,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:39,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:39,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030143234] [2024-10-13 07:15:39,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030143234] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:39,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628781156] [2024-10-13 07:15:39,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:15:39,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:39,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:39,910 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) [2024-10-13 07:15:39,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 07:15:39,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:15:39,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:39,968 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-13 07:15:39,970 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:40,054 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:40,080 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 07:15:40,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-10-13 07:15:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:15:40,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628781156] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:40,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:40,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 15 [2024-10-13 07:15:40,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743528816] [2024-10-13 07:15:40,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:40,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-13 07:15:40,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:40,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-13 07:15:40,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-10-13 07:15:40,123 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-10-13 07:15:40,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 103 transitions, 1020 flow. Second operand has 16 states, 16 states have (on average 8.8125) internal successors, (141), 16 states have internal predecessors, (141), 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) [2024-10-13 07:15:40,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:40,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-10-13 07:15:40,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:40,695 INFO L124 PetriNetUnfolderBase]: 1366/2825 cut-off events. [2024-10-13 07:15:40,695 INFO L125 PetriNetUnfolderBase]: For 21530/21530 co-relation queries the response was YES. [2024-10-13 07:15:40,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11364 conditions, 2825 events. 1366/2825 cut-off events. For 21530/21530 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 18335 event pairs, 181 based on Foata normal form. 56/2878 useless extension candidates. Maximal degree in co-relation 11335. Up to 940 conditions per place. [2024-10-13 07:15:40,716 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 122 selfloop transitions, 51 changer transitions 0/179 dead transitions. [2024-10-13 07:15:40,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 179 transitions, 2067 flow [2024-10-13 07:15:40,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 07:15:40,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-13 07:15:40,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 163 transitions. [2024-10-13 07:15:40,718 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4323607427055703 [2024-10-13 07:15:40,718 INFO L175 Difference]: Start difference. First operand has 97 places, 103 transitions, 1020 flow. Second operand 13 states and 163 transitions. [2024-10-13 07:15:40,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 179 transitions, 2067 flow [2024-10-13 07:15:40,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 179 transitions, 1821 flow, removed 113 selfloop flow, removed 8 redundant places. [2024-10-13 07:15:40,766 INFO L231 Difference]: Finished difference. Result has 101 places, 112 transitions, 1075 flow [2024-10-13 07:15:40,768 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1075, PETRI_PLACES=101, PETRI_TRANSITIONS=112} [2024-10-13 07:15:40,769 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 72 predicate places. [2024-10-13 07:15:40,770 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 112 transitions, 1075 flow [2024-10-13 07:15:40,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.8125) internal successors, (141), 16 states have internal predecessors, (141), 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) [2024-10-13 07:15:40,770 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:40,770 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:40,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-13 07:15:40,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:40,973 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:40,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:40,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1600182161, now seen corresponding path program 1 times [2024-10-13 07:15:40,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:40,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100446927] [2024-10-13 07:15:40,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:40,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:41,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:41,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100446927] [2024-10-13 07:15:41,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100446927] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:41,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056607104] [2024-10-13 07:15:41,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:41,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:41,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:41,550 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:41,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 07:15:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:41,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-13 07:15:41,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:42,070 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-10-13 07:15:42,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2024-10-13 07:15:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:42,163 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:42,418 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:15:42,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-10-13 07:15:42,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:42,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056607104] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:42,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:42,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-10-13 07:15:42,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569035579] [2024-10-13 07:15:42,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:42,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-13 07:15:42,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:42,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-13 07:15:42,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1465, Unknown=0, NotChecked=0, Total=1640 [2024-10-13 07:15:42,753 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-13 07:15:42,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 112 transitions, 1075 flow. Second operand has 41 states, 41 states have (on average 5.829268292682927) internal successors, (239), 41 states have internal predecessors, (239), 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) [2024-10-13 07:15:42,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:42,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-13 07:15:42,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:46,484 INFO L124 PetriNetUnfolderBase]: 3311/6201 cut-off events. [2024-10-13 07:15:46,484 INFO L125 PetriNetUnfolderBase]: For 42325/42325 co-relation queries the response was YES. [2024-10-13 07:15:46,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24742 conditions, 6201 events. 3311/6201 cut-off events. For 42325/42325 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 40877 event pairs, 303 based on Foata normal form. 7/6208 useless extension candidates. Maximal degree in co-relation 24713. Up to 2249 conditions per place. [2024-10-13 07:15:46,520 INFO L140 encePairwiseOnDemand]: 15/29 looper letters, 291 selfloop transitions, 183 changer transitions 63/539 dead transitions. [2024-10-13 07:15:46,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 539 transitions, 4983 flow [2024-10-13 07:15:46,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-10-13 07:15:46,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-10-13 07:15:46,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 615 transitions. [2024-10-13 07:15:46,523 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33135775862068967 [2024-10-13 07:15:46,523 INFO L175 Difference]: Start difference. First operand has 101 places, 112 transitions, 1075 flow. Second operand 64 states and 615 transitions. [2024-10-13 07:15:46,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 539 transitions, 4983 flow [2024-10-13 07:15:46,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 539 transitions, 4969 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-13 07:15:46,660 INFO L231 Difference]: Finished difference. Result has 186 places, 267 transitions, 3114 flow [2024-10-13 07:15:46,660 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1061, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=3114, PETRI_PLACES=186, PETRI_TRANSITIONS=267} [2024-10-13 07:15:46,661 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 157 predicate places. [2024-10-13 07:15:46,661 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 267 transitions, 3114 flow [2024-10-13 07:15:46,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.829268292682927) internal successors, (239), 41 states have internal predecessors, (239), 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) [2024-10-13 07:15:46,661 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:46,662 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:46,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-13 07:15:46,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:46,866 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:46,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:46,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1183298053, now seen corresponding path program 2 times [2024-10-13 07:15:46,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:46,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707585174] [2024-10-13 07:15:46,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:46,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:47,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:47,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707585174] [2024-10-13 07:15:47,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707585174] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:47,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704252018] [2024-10-13 07:15:47,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:15:47,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:47,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:47,408 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:47,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 07:15:47,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:15:47,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:47,504 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-13 07:15:47,505 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:47,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2024-10-13 07:15:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:47,897 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:48,127 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:15:48,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-10-13 07:15:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:48,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704252018] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:48,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:48,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2024-10-13 07:15:48,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498718022] [2024-10-13 07:15:48,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:48,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-13 07:15:48,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:48,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-13 07:15:48,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1423, Unknown=0, NotChecked=0, Total=1640 [2024-10-13 07:15:48,405 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-13 07:15:48,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 267 transitions, 3114 flow. Second operand has 41 states, 41 states have (on average 5.804878048780488) internal successors, (238), 41 states have internal predecessors, (238), 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) [2024-10-13 07:15:48,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:48,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-13 07:15:48,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:52,425 INFO L124 PetriNetUnfolderBase]: 4293/8117 cut-off events. [2024-10-13 07:15:52,425 INFO L125 PetriNetUnfolderBase]: For 92982/92982 co-relation queries the response was YES. [2024-10-13 07:15:52,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41512 conditions, 8117 events. 4293/8117 cut-off events. For 92982/92982 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 58215 event pairs, 262 based on Foata normal form. 4/8121 useless extension candidates. Maximal degree in co-relation 41456. Up to 2373 conditions per place. [2024-10-13 07:15:52,479 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 284 selfloop transitions, 504 changer transitions 65/855 dead transitions. [2024-10-13 07:15:52,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 855 transitions, 10586 flow [2024-10-13 07:15:52,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-10-13 07:15:52,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2024-10-13 07:15:52,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 659 transitions. [2024-10-13 07:15:52,482 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3341784989858012 [2024-10-13 07:15:52,482 INFO L175 Difference]: Start difference. First operand has 186 places, 267 transitions, 3114 flow. Second operand 68 states and 659 transitions. [2024-10-13 07:15:52,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 855 transitions, 10586 flow [2024-10-13 07:15:52,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 855 transitions, 10096 flow, removed 232 selfloop flow, removed 10 redundant places. [2024-10-13 07:15:52,716 INFO L231 Difference]: Finished difference. Result has 257 places, 609 transitions, 8727 flow [2024-10-13 07:15:52,717 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2843, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=8727, PETRI_PLACES=257, PETRI_TRANSITIONS=609} [2024-10-13 07:15:52,717 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 228 predicate places. [2024-10-13 07:15:52,717 INFO L471 AbstractCegarLoop]: Abstraction has has 257 places, 609 transitions, 8727 flow [2024-10-13 07:15:52,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.804878048780488) internal successors, (238), 41 states have internal predecessors, (238), 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) [2024-10-13 07:15:52,718 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:52,718 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:52,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-13 07:15:52,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:52,923 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:52,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:52,923 INFO L85 PathProgramCache]: Analyzing trace with hash -166545805, now seen corresponding path program 3 times [2024-10-13 07:15:52,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:52,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987246755] [2024-10-13 07:15:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:52,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:53,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:53,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987246755] [2024-10-13 07:15:53,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987246755] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:53,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095322911] [2024-10-13 07:15:53,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:15:53,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:53,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:53,507 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:53,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 07:15:53,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 07:15:53,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:53,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-13 07:15:53,569 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:53,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-10-13 07:15:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:53,965 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:54,150 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:15:54,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-10-13 07:15:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:54,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095322911] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:54,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:54,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2024-10-13 07:15:54,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353770432] [2024-10-13 07:15:54,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:54,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-13 07:15:54,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:54,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-13 07:15:54,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1489, Unknown=0, NotChecked=0, Total=1722 [2024-10-13 07:15:54,423 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-13 07:15:54,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 609 transitions, 8727 flow. Second operand has 42 states, 42 states have (on average 5.785714285714286) internal successors, (243), 42 states have internal predecessors, (243), 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) [2024-10-13 07:15:54,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:54,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-13 07:15:54,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:58,574 INFO L124 PetriNetUnfolderBase]: 4373/8293 cut-off events. [2024-10-13 07:15:58,574 INFO L125 PetriNetUnfolderBase]: For 144537/144537 co-relation queries the response was YES. [2024-10-13 07:15:58,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51605 conditions, 8293 events. 4373/8293 cut-off events. For 144537/144537 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 59708 event pairs, 349 based on Foata normal form. 4/8291 useless extension candidates. Maximal degree in co-relation 51529. Up to 3868 conditions per place. [2024-10-13 07:15:58,652 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 305 selfloop transitions, 527 changer transitions 66/900 dead transitions. [2024-10-13 07:15:58,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 900 transitions, 13380 flow [2024-10-13 07:15:58,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-10-13 07:15:58,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2024-10-13 07:15:58,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 573 transitions. [2024-10-13 07:15:58,655 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.323911814584511 [2024-10-13 07:15:58,655 INFO L175 Difference]: Start difference. First operand has 257 places, 609 transitions, 8727 flow. Second operand 61 states and 573 transitions. [2024-10-13 07:15:58,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 900 transitions, 13380 flow [2024-10-13 07:15:59,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 900 transitions, 12668 flow, removed 313 selfloop flow, removed 24 redundant places. [2024-10-13 07:15:59,486 INFO L231 Difference]: Finished difference. Result has 305 places, 704 transitions, 11515 flow [2024-10-13 07:15:59,487 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=8160, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=421, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=11515, PETRI_PLACES=305, PETRI_TRANSITIONS=704} [2024-10-13 07:15:59,487 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 276 predicate places. [2024-10-13 07:15:59,488 INFO L471 AbstractCegarLoop]: Abstraction has has 305 places, 704 transitions, 11515 flow [2024-10-13 07:15:59,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.785714285714286) internal successors, (243), 42 states have internal predecessors, (243), 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) [2024-10-13 07:15:59,488 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:59,488 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:59,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-13 07:15:59,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-13 07:15:59,691 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:15:59,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:59,691 INFO L85 PathProgramCache]: Analyzing trace with hash 765896801, now seen corresponding path program 4 times [2024-10-13 07:15:59,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:59,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848067877] [2024-10-13 07:15:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:59,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:00,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:00,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848067877] [2024-10-13 07:16:00,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848067877] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:16:00,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198989953] [2024-10-13 07:16:00,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:16:00,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:00,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:16:00,307 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:16:00,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 07:16:00,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:16:00,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:16:00,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-13 07:16:00,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:16:00,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-10-13 07:16:00,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:00,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:16:00,887 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:16:00,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-10-13 07:16:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:01,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198989953] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:16:01,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:16:01,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2024-10-13 07:16:01,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970462012] [2024-10-13 07:16:01,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:16:01,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-13 07:16:01,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:01,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-13 07:16:01,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2024-10-13 07:16:01,168 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-13 07:16:01,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 704 transitions, 11515 flow. Second operand has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 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) [2024-10-13 07:16:01,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:01,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-13 07:16:01,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:16:04,132 INFO L124 PetriNetUnfolderBase]: 4379/8261 cut-off events. [2024-10-13 07:16:04,133 INFO L125 PetriNetUnfolderBase]: For 164170/164170 co-relation queries the response was YES. [2024-10-13 07:16:04,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56445 conditions, 8261 events. 4379/8261 cut-off events. For 164170/164170 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 59152 event pairs, 427 based on Foata normal form. 5/8266 useless extension candidates. Maximal degree in co-relation 56358. Up to 4128 conditions per place. [2024-10-13 07:16:04,216 INFO L140 encePairwiseOnDemand]: 15/29 looper letters, 382 selfloop transitions, 429 changer transitions 58/871 dead transitions. [2024-10-13 07:16:04,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 871 transitions, 15007 flow [2024-10-13 07:16:04,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-13 07:16:04,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-10-13 07:16:04,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 348 transitions. [2024-10-13 07:16:04,217 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3157894736842105 [2024-10-13 07:16:04,218 INFO L175 Difference]: Start difference. First operand has 305 places, 704 transitions, 11515 flow. Second operand 38 states and 348 transitions. [2024-10-13 07:16:04,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 871 transitions, 15007 flow [2024-10-13 07:16:05,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 871 transitions, 14682 flow, removed 119 selfloop flow, removed 25 redundant places. [2024-10-13 07:16:05,154 INFO L231 Difference]: Finished difference. Result has 311 places, 724 transitions, 13277 flow [2024-10-13 07:16:05,155 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=11219, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=13277, PETRI_PLACES=311, PETRI_TRANSITIONS=724} [2024-10-13 07:16:05,155 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 282 predicate places. [2024-10-13 07:16:05,156 INFO L471 AbstractCegarLoop]: Abstraction has has 311 places, 724 transitions, 13277 flow [2024-10-13 07:16:05,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 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) [2024-10-13 07:16:05,156 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:05,156 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:16:05,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-13 07:16:05,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-13 07:16:05,357 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:05,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:05,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1194612045, now seen corresponding path program 5 times [2024-10-13 07:16:05,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:05,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879963675] [2024-10-13 07:16:05,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:05,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:05,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:05,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879963675] [2024-10-13 07:16:05,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879963675] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:16:05,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071795198] [2024-10-13 07:16:05,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:16:05,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:05,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:16:05,995 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:16:05,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 07:16:06,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-13 07:16:06,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:16:06,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-13 07:16:06,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:16:06,286 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:16:06,286 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:16:06,401 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:16:06,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-10-13 07:16:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:16:06,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071795198] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:16:06,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:16:06,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 10] total 34 [2024-10-13 07:16:06,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262203410] [2024-10-13 07:16:06,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:16:06,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-13 07:16:06,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:06,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-13 07:16:06,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2024-10-13 07:16:06,497 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-13 07:16:06,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 724 transitions, 13277 flow. Second operand has 35 states, 35 states have (on average 5.914285714285715) internal successors, (207), 35 states have internal predecessors, (207), 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) [2024-10-13 07:16:06,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:06,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-13 07:16:06,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:16:09,254 INFO L124 PetriNetUnfolderBase]: 4453/8356 cut-off events. [2024-10-13 07:16:09,254 INFO L125 PetriNetUnfolderBase]: For 200002/200002 co-relation queries the response was YES. [2024-10-13 07:16:09,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62839 conditions, 8356 events. 4453/8356 cut-off events. For 200002/200002 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 59698 event pairs, 434 based on Foata normal form. 1/8357 useless extension candidates. Maximal degree in co-relation 62748. Up to 3836 conditions per place. [2024-10-13 07:16:09,348 INFO L140 encePairwiseOnDemand]: 16/29 looper letters, 453 selfloop transitions, 423 changer transitions 26/904 dead transitions. [2024-10-13 07:16:09,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 904 transitions, 17232 flow [2024-10-13 07:16:09,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-13 07:16:09,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-13 07:16:09,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 284 transitions. [2024-10-13 07:16:09,350 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3497536945812808 [2024-10-13 07:16:09,350 INFO L175 Difference]: Start difference. First operand has 311 places, 724 transitions, 13277 flow. Second operand 28 states and 284 transitions. [2024-10-13 07:16:09,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 904 transitions, 17232 flow [2024-10-13 07:16:10,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 904 transitions, 16926 flow, removed 117 selfloop flow, removed 22 redundant places. [2024-10-13 07:16:10,429 INFO L231 Difference]: Finished difference. Result has 310 places, 757 transitions, 14932 flow [2024-10-13 07:16:10,429 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=13034, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=389, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=14932, PETRI_PLACES=310, PETRI_TRANSITIONS=757} [2024-10-13 07:16:10,430 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 281 predicate places. [2024-10-13 07:16:10,430 INFO L471 AbstractCegarLoop]: Abstraction has has 310 places, 757 transitions, 14932 flow [2024-10-13 07:16:10,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.914285714285715) internal successors, (207), 35 states have internal predecessors, (207), 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) [2024-10-13 07:16:10,430 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:10,430 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:16:10,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-13 07:16:10,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-13 07:16:10,630 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:10,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:10,631 INFO L85 PathProgramCache]: Analyzing trace with hash 467599359, now seen corresponding path program 6 times [2024-10-13 07:16:10,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:10,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877607649] [2024-10-13 07:16:10,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:10,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:11,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:11,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877607649] [2024-10-13 07:16:11,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877607649] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:16:11,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724207987] [2024-10-13 07:16:11,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:16:11,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:11,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:16:11,233 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:16:11,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 07:16:11,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-13 07:16:11,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:16:11,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-13 07:16:11,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:16:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:16:11,521 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:16:11,663 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:16:11,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2024-10-13 07:16:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:16:11,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724207987] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:16:11,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:16:11,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 11] total 37 [2024-10-13 07:16:11,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118403787] [2024-10-13 07:16:11,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:16:11,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-13 07:16:11,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:11,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-13 07:16:11,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2024-10-13 07:16:11,740 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-13 07:16:11,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 757 transitions, 14932 flow. Second operand has 38 states, 38 states have (on average 5.7631578947368425) internal successors, (219), 38 states have internal predecessors, (219), 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) [2024-10-13 07:16:11,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:11,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-13 07:16:11,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:16:14,451 INFO L124 PetriNetUnfolderBase]: 4412/8260 cut-off events. [2024-10-13 07:16:14,451 INFO L125 PetriNetUnfolderBase]: For 225742/225742 co-relation queries the response was YES. [2024-10-13 07:16:14,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65147 conditions, 8260 events. 4412/8260 cut-off events. For 225742/225742 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 58084 event pairs, 298 based on Foata normal form. 1/8261 useless extension candidates. Maximal degree in co-relation 65053. Up to 2915 conditions per place. [2024-10-13 07:16:14,528 INFO L140 encePairwiseOnDemand]: 14/29 looper letters, 402 selfloop transitions, 505 changer transitions 44/953 dead transitions. [2024-10-13 07:16:14,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 953 transitions, 18952 flow [2024-10-13 07:16:14,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-13 07:16:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-10-13 07:16:14,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 368 transitions. [2024-10-13 07:16:14,530 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3339382940108893 [2024-10-13 07:16:14,530 INFO L175 Difference]: Start difference. First operand has 310 places, 757 transitions, 14932 flow. Second operand 38 states and 368 transitions. [2024-10-13 07:16:14,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 953 transitions, 18952 flow [2024-10-13 07:16:15,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 953 transitions, 18854 flow, removed 33 selfloop flow, removed 11 redundant places. [2024-10-13 07:16:15,619 INFO L231 Difference]: Finished difference. Result has 341 places, 786 transitions, 16391 flow [2024-10-13 07:16:15,620 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14862, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=473, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=16391, PETRI_PLACES=341, PETRI_TRANSITIONS=786} [2024-10-13 07:16:15,620 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 312 predicate places. [2024-10-13 07:16:15,620 INFO L471 AbstractCegarLoop]: Abstraction has has 341 places, 786 transitions, 16391 flow [2024-10-13 07:16:15,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.7631578947368425) internal successors, (219), 38 states have internal predecessors, (219), 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) [2024-10-13 07:16:15,620 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:15,620 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:16:15,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-13 07:16:15,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-13 07:16:15,821 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:15,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:15,822 INFO L85 PathProgramCache]: Analyzing trace with hash 289980871, now seen corresponding path program 7 times [2024-10-13 07:16:15,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:15,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685580083] [2024-10-13 07:16:15,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:15,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:16,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:16,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685580083] [2024-10-13 07:16:16,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685580083] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:16:16,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435397010] [2024-10-13 07:16:16,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:16:16,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:16,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:16:16,503 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:16:16,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-13 07:16:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:16,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-13 07:16:16,561 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:16:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:16:16,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:16:16,908 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:16:16,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-10-13 07:16:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:16:16,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435397010] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:16:16,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:16:16,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 35 [2024-10-13 07:16:16,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709114378] [2024-10-13 07:16:16,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:16:16,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-13 07:16:16,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:16,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-13 07:16:16,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2024-10-13 07:16:17,004 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-13 07:16:17,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 786 transitions, 16391 flow. Second operand has 36 states, 36 states have (on average 5.861111111111111) internal successors, (211), 36 states have internal predecessors, (211), 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) [2024-10-13 07:16:17,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:17,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-13 07:16:17,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:16:19,675 INFO L124 PetriNetUnfolderBase]: 4536/8492 cut-off events. [2024-10-13 07:16:19,676 INFO L125 PetriNetUnfolderBase]: For 245955/245955 co-relation queries the response was YES. [2024-10-13 07:16:19,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69970 conditions, 8492 events. 4536/8492 cut-off events. For 245955/245955 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 60612 event pairs, 425 based on Foata normal form. 1/8493 useless extension candidates. Maximal degree in co-relation 69874. Up to 4677 conditions per place. [2024-10-13 07:16:19,755 INFO L140 encePairwiseOnDemand]: 14/29 looper letters, 414 selfloop transitions, 460 changer transitions 40/916 dead transitions. [2024-10-13 07:16:19,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 916 transitions, 19751 flow [2024-10-13 07:16:19,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-13 07:16:19,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-13 07:16:19,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 267 transitions. [2024-10-13 07:16:19,757 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3288177339901478 [2024-10-13 07:16:19,757 INFO L175 Difference]: Start difference. First operand has 341 places, 786 transitions, 16391 flow. Second operand 28 states and 267 transitions. [2024-10-13 07:16:19,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 916 transitions, 19751 flow [2024-10-13 07:16:20,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 916 transitions, 19370 flow, removed 34 selfloop flow, removed 18 redundant places. [2024-10-13 07:16:20,957 INFO L231 Difference]: Finished difference. Result has 353 places, 804 transitions, 18091 flow [2024-10-13 07:16:20,958 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=16034, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=18091, PETRI_PLACES=353, PETRI_TRANSITIONS=804} [2024-10-13 07:16:20,958 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 324 predicate places. [2024-10-13 07:16:20,959 INFO L471 AbstractCegarLoop]: Abstraction has has 353 places, 804 transitions, 18091 flow [2024-10-13 07:16:20,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.861111111111111) internal successors, (211), 36 states have internal predecessors, (211), 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) [2024-10-13 07:16:20,959 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:20,960 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:16:20,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-13 07:16:21,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-13 07:16:21,160 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:21,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:21,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1640305171, now seen corresponding path program 8 times [2024-10-13 07:16:21,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:21,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796567911] [2024-10-13 07:16:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:21,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:21,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:21,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796567911] [2024-10-13 07:16:21,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796567911] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:16:21,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426092934] [2024-10-13 07:16:21,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:16:21,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:21,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:16:21,691 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:16:21,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-13 07:16:21,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:16:21,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:16:21,746 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-13 07:16:21,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:16:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:16:22,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:16:22,139 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:16:22,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-10-13 07:16:22,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:16:22,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426092934] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:16:22,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:16:22,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 35 [2024-10-13 07:16:22,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497673920] [2024-10-13 07:16:22,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:16:22,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-13 07:16:22,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:22,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-13 07:16:22,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2024-10-13 07:16:22,210 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-13 07:16:22,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 804 transitions, 18091 flow. Second operand has 36 states, 36 states have (on average 5.861111111111111) internal successors, (211), 36 states have internal predecessors, (211), 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) [2024-10-13 07:16:22,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:22,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-13 07:16:22,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:16:24,916 INFO L124 PetriNetUnfolderBase]: 4786/8958 cut-off events. [2024-10-13 07:16:24,916 INFO L125 PetriNetUnfolderBase]: For 313503/313503 co-relation queries the response was YES. [2024-10-13 07:16:24,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78775 conditions, 8958 events. 4786/8958 cut-off events. For 313503/313503 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 64670 event pairs, 419 based on Foata normal form. 1/8959 useless extension candidates. Maximal degree in co-relation 78671. Up to 3967 conditions per place. [2024-10-13 07:16:25,166 INFO L140 encePairwiseOnDemand]: 14/29 looper letters, 434 selfloop transitions, 573 changer transitions 33/1042 dead transitions. [2024-10-13 07:16:25,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 1042 transitions, 24351 flow [2024-10-13 07:16:25,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-13 07:16:25,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-10-13 07:16:25,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 310 transitions. [2024-10-13 07:16:25,168 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3144016227180527 [2024-10-13 07:16:25,168 INFO L175 Difference]: Start difference. First operand has 353 places, 804 transitions, 18091 flow. Second operand 34 states and 310 transitions. [2024-10-13 07:16:25,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 1042 transitions, 24351 flow [2024-10-13 07:16:26,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1042 transitions, 24243 flow, removed 23 selfloop flow, removed 20 redundant places. [2024-10-13 07:16:26,627 INFO L231 Difference]: Finished difference. Result has 368 places, 901 transitions, 22207 flow [2024-10-13 07:16:26,628 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=17999, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=483, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=22207, PETRI_PLACES=368, PETRI_TRANSITIONS=901} [2024-10-13 07:16:26,628 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 339 predicate places. [2024-10-13 07:16:26,628 INFO L471 AbstractCegarLoop]: Abstraction has has 368 places, 901 transitions, 22207 flow [2024-10-13 07:16:26,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.861111111111111) internal successors, (211), 36 states have internal predecessors, (211), 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) [2024-10-13 07:16:26,629 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:26,629 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:16:26,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-13 07:16:26,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-13 07:16:26,829 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:26,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:26,830 INFO L85 PathProgramCache]: Analyzing trace with hash -860762721, now seen corresponding path program 9 times [2024-10-13 07:16:26,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:26,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857911479] [2024-10-13 07:16:26,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:26,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:16:26,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:26,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857911479] [2024-10-13 07:16:26,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857911479] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:16:26,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074715833] [2024-10-13 07:16:26,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:16:26,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:26,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:16:26,962 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:16:26,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-13 07:16:27,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-13 07:16:27,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:16:27,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 07:16:27,034 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:16:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:16:27,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:16:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:16:27,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074715833] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:16:27,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:16:27,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2024-10-13 07:16:27,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607256819] [2024-10-13 07:16:27,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:16:27,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 07:16:27,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:27,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 07:16:27,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2024-10-13 07:16:27,335 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-10-13 07:16:27,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 901 transitions, 22207 flow. Second operand has 22 states, 22 states have (on average 10.590909090909092) internal successors, (233), 22 states have internal predecessors, (233), 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) [2024-10-13 07:16:27,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:27,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-10-13 07:16:27,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:16:28,329 INFO L124 PetriNetUnfolderBase]: 1512/3335 cut-off events. [2024-10-13 07:16:28,329 INFO L125 PetriNetUnfolderBase]: For 137658/137740 co-relation queries the response was YES. [2024-10-13 07:16:28,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32743 conditions, 3335 events. 1512/3335 cut-off events. For 137658/137740 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 24269 event pairs, 110 based on Foata normal form. 138/3444 useless extension candidates. Maximal degree in co-relation 32635. Up to 1698 conditions per place. [2024-10-13 07:16:28,366 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 239 selfloop transitions, 13 changer transitions 115/478 dead transitions. [2024-10-13 07:16:28,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 478 transitions, 11660 flow [2024-10-13 07:16:28,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 07:16:28,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-13 07:16:28,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 161 transitions. [2024-10-13 07:16:28,367 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5047021943573667 [2024-10-13 07:16:28,367 INFO L175 Difference]: Start difference. First operand has 368 places, 901 transitions, 22207 flow. Second operand 11 states and 161 transitions. [2024-10-13 07:16:28,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 478 transitions, 11660 flow [2024-10-13 07:16:28,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 478 transitions, 10235 flow, removed 154 selfloop flow, removed 64 redundant places. [2024-10-13 07:16:28,824 INFO L231 Difference]: Finished difference. Result has 269 places, 335 transitions, 7151 flow [2024-10-13 07:16:28,824 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9299, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7151, PETRI_PLACES=269, PETRI_TRANSITIONS=335} [2024-10-13 07:16:28,824 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 240 predicate places. [2024-10-13 07:16:28,824 INFO L471 AbstractCegarLoop]: Abstraction has has 269 places, 335 transitions, 7151 flow [2024-10-13 07:16:28,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.590909090909092) internal successors, (233), 22 states have internal predecessors, (233), 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) [2024-10-13 07:16:28,825 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:28,825 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:16:28,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-13 07:16:29,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:29,025 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:29,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:29,026 INFO L85 PathProgramCache]: Analyzing trace with hash -484397437, now seen corresponding path program 10 times [2024-10-13 07:16:29,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:29,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261867739] [2024-10-13 07:16:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:29,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:29,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:29,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261867739] [2024-10-13 07:16:29,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261867739] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:16:29,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049949161] [2024-10-13 07:16:29,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:16:29,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:29,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:16:29,416 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:16:29,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-13 07:16:29,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:16:29,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:16:29,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-13 07:16:29,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:16:29,760 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 07:16:29,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-10-13 07:16:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:29,779 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:16:29,857 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-13 07:16:29,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2024-10-13 07:16:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:30,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049949161] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:16:30,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:16:30,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-10-13 07:16:30,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403929616] [2024-10-13 07:16:30,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:16:30,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-13 07:16:30,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:30,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-13 07:16:30,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2024-10-13 07:16:30,125 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-10-13 07:16:30,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 335 transitions, 7151 flow. Second operand has 31 states, 31 states have (on average 8.290322580645162) internal successors, (257), 31 states have internal predecessors, (257), 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) [2024-10-13 07:16:30,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:30,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-10-13 07:16:30,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:16:33,733 INFO L124 PetriNetUnfolderBase]: 4786/9123 cut-off events. [2024-10-13 07:16:33,733 INFO L125 PetriNetUnfolderBase]: For 302860/303259 co-relation queries the response was YES. [2024-10-13 07:16:33,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80457 conditions, 9123 events. 4786/9123 cut-off events. For 302860/303259 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 62938 event pairs, 455 based on Foata normal form. 391/9498 useless extension candidates. Maximal degree in co-relation 80386. Up to 2255 conditions per place. [2024-10-13 07:16:33,832 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 868 selfloop transitions, 481 changer transitions 0/1421 dead transitions. [2024-10-13 07:16:33,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 1421 transitions, 31978 flow [2024-10-13 07:16:33,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-10-13 07:16:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-10-13 07:16:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 728 transitions. [2024-10-13 07:16:33,834 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5229885057471264 [2024-10-13 07:16:33,834 INFO L175 Difference]: Start difference. First operand has 269 places, 335 transitions, 7151 flow. Second operand 48 states and 728 transitions. [2024-10-13 07:16:33,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 1421 transitions, 31978 flow [2024-10-13 07:16:34,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 1421 transitions, 29742 flow, removed 615 selfloop flow, removed 31 redundant places. [2024-10-13 07:16:34,655 INFO L231 Difference]: Finished difference. Result has 291 places, 757 transitions, 19049 flow [2024-10-13 07:16:34,655 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6760, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=19049, PETRI_PLACES=291, PETRI_TRANSITIONS=757} [2024-10-13 07:16:34,655 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 262 predicate places. [2024-10-13 07:16:34,656 INFO L471 AbstractCegarLoop]: Abstraction has has 291 places, 757 transitions, 19049 flow [2024-10-13 07:16:34,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 8.290322580645162) internal successors, (257), 31 states have internal predecessors, (257), 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) [2024-10-13 07:16:34,657 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:34,657 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:16:34,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-13 07:16:34,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:34,857 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:34,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:34,858 INFO L85 PathProgramCache]: Analyzing trace with hash -2096187447, now seen corresponding path program 11 times [2024-10-13 07:16:34,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:34,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392462298] [2024-10-13 07:16:34,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:34,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:35,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:35,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392462298] [2024-10-13 07:16:35,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392462298] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:16:35,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003481933] [2024-10-13 07:16:35,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:16:35,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:35,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:16:35,196 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:16:35,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-13 07:16:35,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-13 07:16:35,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:16:35,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-13 07:16:35,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:16:35,513 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 07:16:35,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-10-13 07:16:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:35,527 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:16:35,627 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-13 07:16:35,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2024-10-13 07:16:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:35,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003481933] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:16:35,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:16:35,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-10-13 07:16:35,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207423243] [2024-10-13 07:16:35,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:16:35,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-13 07:16:35,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:35,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-13 07:16:35,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2024-10-13 07:16:35,914 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-10-13 07:16:35,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 757 transitions, 19049 flow. Second operand has 31 states, 31 states have (on average 8.290322580645162) internal successors, (257), 31 states have internal predecessors, (257), 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) [2024-10-13 07:16:35,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:35,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-10-13 07:16:35,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:16:42,850 INFO L124 PetriNetUnfolderBase]: 9786/18333 cut-off events. [2024-10-13 07:16:42,850 INFO L125 PetriNetUnfolderBase]: For 1272513/1273822 co-relation queries the response was YES. [2024-10-13 07:16:42,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195699 conditions, 18333 events. 9786/18333 cut-off events. For 1272513/1273822 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 136476 event pairs, 788 based on Foata normal form. 757/19071 useless extension candidates. Maximal degree in co-relation 195601. Up to 4822 conditions per place. [2024-10-13 07:16:43,210 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 1202 selfloop transitions, 982 changer transitions 0/2256 dead transitions. [2024-10-13 07:16:43,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 2256 transitions, 61390 flow [2024-10-13 07:16:43,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-10-13 07:16:43,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2024-10-13 07:16:43,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 825 transitions. [2024-10-13 07:16:43,214 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49909255898366606 [2024-10-13 07:16:43,215 INFO L175 Difference]: Start difference. First operand has 291 places, 757 transitions, 19049 flow. Second operand 57 states and 825 transitions. [2024-10-13 07:16:43,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 2256 transitions, 61390 flow [2024-10-13 07:16:47,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 2256 transitions, 58732 flow, removed 1311 selfloop flow, removed 7 redundant places. [2024-10-13 07:16:47,491 INFO L231 Difference]: Finished difference. Result has 378 places, 1438 transitions, 42960 flow [2024-10-13 07:16:47,492 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=17690, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=42960, PETRI_PLACES=378, PETRI_TRANSITIONS=1438} [2024-10-13 07:16:47,492 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 349 predicate places. [2024-10-13 07:16:47,492 INFO L471 AbstractCegarLoop]: Abstraction has has 378 places, 1438 transitions, 42960 flow [2024-10-13 07:16:47,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 8.290322580645162) internal successors, (257), 31 states have internal predecessors, (257), 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) [2024-10-13 07:16:47,492 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:47,492 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:16:47,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-13 07:16:47,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:47,693 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:47,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:47,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1379569761, now seen corresponding path program 12 times [2024-10-13 07:16:47,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:47,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8855694] [2024-10-13 07:16:47,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:47,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:48,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:48,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8855694] [2024-10-13 07:16:48,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8855694] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:16:48,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044382582] [2024-10-13 07:16:48,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:16:48,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:48,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:16:48,053 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:16:48,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-13 07:16:48,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-13 07:16:48,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:16:48,114 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-13 07:16:48,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:16:48,292 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:16:48,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2024-10-13 07:16:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:48,362 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:16:48,527 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 07:16:48,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-10-13 07:16:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:48,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044382582] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:16:48,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:16:48,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-10-13 07:16:48,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967796576] [2024-10-13 07:16:48,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:16:48,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-13 07:16:48,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:48,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-13 07:16:48,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2024-10-13 07:16:48,894 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-10-13 07:16:48,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 1438 transitions, 42960 flow. Second operand has 32 states, 32 states have (on average 8.1875) internal successors, (262), 32 states have internal predecessors, (262), 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) [2024-10-13 07:16:48,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:48,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-10-13 07:16:48,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:16:53,817 INFO L124 PetriNetUnfolderBase]: 4393/9048 cut-off events. [2024-10-13 07:16:53,817 INFO L125 PetriNetUnfolderBase]: For 743278/743468 co-relation queries the response was YES. [2024-10-13 07:16:53,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95546 conditions, 9048 events. 4393/9048 cut-off events. For 743278/743468 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 69919 event pairs, 499 based on Foata normal form. 600/9618 useless extension candidates. Maximal degree in co-relation 95409. Up to 2392 conditions per place. [2024-10-13 07:16:53,921 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 460 selfloop transitions, 221 changer transitions 372/1125 dead transitions. [2024-10-13 07:16:53,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1125 transitions, 31070 flow [2024-10-13 07:16:53,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-13 07:16:53,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-10-13 07:16:53,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 516 transitions. [2024-10-13 07:16:53,922 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46823956442831216 [2024-10-13 07:16:53,922 INFO L175 Difference]: Start difference. First operand has 378 places, 1438 transitions, 42960 flow. Second operand 38 states and 516 transitions. [2024-10-13 07:16:53,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1125 transitions, 31070 flow [2024-10-13 07:16:57,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1125 transitions, 28290 flow, removed 1141 selfloop flow, removed 43 redundant places. [2024-10-13 07:16:57,368 INFO L231 Difference]: Finished difference. Result has 369 places, 530 transitions, 13715 flow [2024-10-13 07:16:57,368 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=19960, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=13715, PETRI_PLACES=369, PETRI_TRANSITIONS=530} [2024-10-13 07:16:57,368 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 340 predicate places. [2024-10-13 07:16:57,368 INFO L471 AbstractCegarLoop]: Abstraction has has 369 places, 530 transitions, 13715 flow [2024-10-13 07:16:57,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 8.1875) internal successors, (262), 32 states have internal predecessors, (262), 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) [2024-10-13 07:16:57,369 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:57,369 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:16:57,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-13 07:16:57,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:57,569 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:57,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:57,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1788862515, now seen corresponding path program 13 times [2024-10-13 07:16:57,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:57,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217477267] [2024-10-13 07:16:57,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:57,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:57,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:57,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217477267] [2024-10-13 07:16:57,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217477267] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:16:57,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724798433] [2024-10-13 07:16:57,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:16:57,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:57,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:16:57,861 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:16:57,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-13 07:16:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:57,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-13 07:16:57,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:16:58,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-10-13 07:16:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:58,148 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:16:58,258 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-13 07:16:58,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2024-10-13 07:16:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:58,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724798433] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:16:58,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:16:58,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-10-13 07:16:58,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98807520] [2024-10-13 07:16:58,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:16:58,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-13 07:16:58,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:58,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-13 07:16:58,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2024-10-13 07:16:58,484 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-10-13 07:16:58,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 530 transitions, 13715 flow. Second operand has 31 states, 31 states have (on average 8.193548387096774) internal successors, (254), 31 states have internal predecessors, (254), 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) [2024-10-13 07:16:58,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:58,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-10-13 07:16:58,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand