./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-mts.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 cc67bee348fb2ffff05c0616660a93fb872177c05d08813d910a29641aea282e --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 02:48:07,031 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 02:48:07,099 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-09 02:48:07,104 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 02:48:07,107 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 02:48:07,133 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 02:48:07,134 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 02:48:07,134 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 02:48:07,135 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 02:48:07,137 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 02:48:07,137 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 02:48:07,138 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 02:48:07,138 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 02:48:07,141 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 02:48:07,141 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 02:48:07,142 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 02:48:07,142 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 02:48:07,142 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 02:48:07,143 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 02:48:07,143 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 02:48:07,143 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 02:48:07,147 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 02:48:07,147 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 02:48:07,148 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 02:48:07,148 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 02:48:07,148 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 02:48:07,148 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 02:48:07,149 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 02:48:07,149 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 02:48:07,149 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 02:48:07,149 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 02:48:07,150 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 02:48:07,150 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 02:48:07,150 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 02:48:07,150 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 02:48:07,151 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 02:48:07,151 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 02:48:07,151 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 02:48:07,151 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 02:48:07,152 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 02:48:07,152 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 02:48:07,153 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 02:48:07,154 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc67bee348fb2ffff05c0616660a93fb872177c05d08813d910a29641aea282e [2024-11-09 02:48:07,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 02:48:07,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 02:48:07,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 02:48:07,471 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 02:48:07,472 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 02:48:07,473 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2024-11-09 02:48:08,935 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 02:48:09,152 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 02:48:09,154 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2024-11-09 02:48:09,166 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb33d6c2e/f48e415ff2764d4f9e1bf8d1971100df/FLAGf504edf6a [2024-11-09 02:48:09,184 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb33d6c2e/f48e415ff2764d4f9e1bf8d1971100df [2024-11-09 02:48:09,187 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 02:48:09,189 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 02:48:09,190 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 02:48:09,191 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 02:48:09,196 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 02:48:09,196 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 02:48:09" (1/1) ... [2024-11-09 02:48:09,199 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3015932c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:48:09, skipping insertion in model container [2024-11-09 02:48:09,200 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 02:48:09" (1/1) ... [2024-11-09 02:48:09,226 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 02:48:09,443 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2572,2585] [2024-11-09 02:48:09,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 02:48:09,465 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 02:48:09,502 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c[2572,2585] [2024-11-09 02:48:09,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 02:48:09,537 INFO L204 MainTranslator]: Completed translation [2024-11-09 02:48:09,537 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:48:09 WrapperNode [2024-11-09 02:48:09,537 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 02:48:09,538 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 02:48:09,538 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 02:48:09,538 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 02:48:09,545 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:48:09" (1/1) ... [2024-11-09 02:48:09,556 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:48:09" (1/1) ... [2024-11-09 02:48:09,593 INFO L138 Inliner]: procedures = 24, calls = 31, calls flagged for inlining = 13, calls inlined = 19, statements flattened = 216 [2024-11-09 02:48:09,593 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 02:48:09,594 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 02:48:09,594 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 02:48:09,594 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 02:48:09,606 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:48:09" (1/1) ... [2024-11-09 02:48:09,606 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:48:09" (1/1) ... [2024-11-09 02:48:09,610 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:48:09" (1/1) ... [2024-11-09 02:48:09,638 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 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]. [2024-11-09 02:48:09,639 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:48:09" (1/1) ... [2024-11-09 02:48:09,639 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:48:09" (1/1) ... [2024-11-09 02:48:09,651 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:48:09" (1/1) ... [2024-11-09 02:48:09,659 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:48:09" (1/1) ... [2024-11-09 02:48:09,665 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:48:09" (1/1) ... [2024-11-09 02:48:09,667 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:48:09" (1/1) ... [2024-11-09 02:48:09,671 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 02:48:09,672 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 02:48:09,672 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 02:48:09,672 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 02:48:09,673 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:48:09" (1/1) ... [2024-11-09 02:48:09,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 02:48:09,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:48:09,724 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 02:48:09,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 02:48:09,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 02:48:09,780 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 02:48:09,780 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 02:48:09,780 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 02:48:09,780 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 02:48:09,780 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-09 02:48:09,781 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-09 02:48:09,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 02:48:09,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 02:48:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 02:48:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 02:48:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-09 02:48:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-09 02:48:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 02:48:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 02:48:09,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 02:48:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 02:48:09,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 02:48:09,786 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 02:48:09,926 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 02:48:09,929 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 02:48:10,319 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 02:48:10,320 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 02:48:10,692 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 02:48:10,693 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-09 02:48:10,694 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:48:10 BoogieIcfgContainer [2024-11-09 02:48:10,694 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 02:48:10,697 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 02:48:10,697 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 02:48:10,701 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 02:48:10,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 02:48:09" (1/3) ... [2024-11-09 02:48:10,702 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19be6c5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 02:48:10, skipping insertion in model container [2024-11-09 02:48:10,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:48:09" (2/3) ... [2024-11-09 02:48:10,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19be6c5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 02:48:10, skipping insertion in model container [2024-11-09 02:48:10,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:48:10" (3/3) ... [2024-11-09 02:48:10,705 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-mts.wvr.c [2024-11-09 02:48:10,724 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 02:48:10,725 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 02:48:10,725 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 02:48:10,790 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-09 02:48:10,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 29 transitions, 79 flow [2024-11-09 02:48:10,865 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2024-11-09 02:48:10,866 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 02:48:10,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 26 events. 4/26 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-11-09 02:48:10,873 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 29 transitions, 79 flow [2024-11-09 02:48:10,876 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 25 transitions, 68 flow [2024-11-09 02:48:10,887 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 02:48:10,895 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;@5fd5ba34, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 02:48:10,895 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-09 02:48:10,907 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 02:48:10,907 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-11-09 02:48:10,908 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 02:48:10,908 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:48:10,909 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:48:10,909 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 02:48:10,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:48:10,915 INFO L85 PathProgramCache]: Analyzing trace with hash 810057854, now seen corresponding path program 1 times [2024-11-09 02:48:10,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:48:10,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683262892] [2024-11-09 02:48:10,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:48:10,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:48:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:48:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:48:11,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:48:11,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683262892] [2024-11-09 02:48:11,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683262892] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:48:11,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:48:11,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 02:48:11,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030395951] [2024-11-09 02:48:11,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:48:11,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 02:48:11,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:48:11,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 02:48:11,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 02:48:11,869 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-11-09 02:48:11,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:48:11,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:48:11,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-11-09 02:48:11,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:48:12,138 INFO L124 PetriNetUnfolderBase]: 439/661 cut-off events. [2024-11-09 02:48:12,139 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-11-09 02:48:12,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1382 conditions, 661 events. 439/661 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2306 event pairs, 124 based on Foata normal form. 1/542 useless extension candidates. Maximal degree in co-relation 1176. Up to 423 conditions per place. [2024-11-09 02:48:12,156 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 35 selfloop transitions, 4 changer transitions 1/42 dead transitions. [2024-11-09 02:48:12,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 197 flow [2024-11-09 02:48:12,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 02:48:12,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 02:48:12,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2024-11-09 02:48:12,171 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6436781609195402 [2024-11-09 02:48:12,173 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 68 flow. Second operand 3 states and 56 transitions. [2024-11-09 02:48:12,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 197 flow [2024-11-09 02:48:12,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 42 transitions, 175 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 02:48:12,182 INFO L231 Difference]: Finished difference. Result has 28 places, 28 transitions, 82 flow [2024-11-09 02:48:12,185 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=28, PETRI_TRANSITIONS=28} [2024-11-09 02:48:12,191 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2024-11-09 02:48:12,192 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 28 transitions, 82 flow [2024-11-09 02:48:12,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:48:12,192 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:48:12,192 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] [2024-11-09 02:48:12,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 02:48:12,193 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 02:48:12,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:48:12,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1894890144, now seen corresponding path program 1 times [2024-11-09 02:48:12,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:48:12,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405747885] [2024-11-09 02:48:12,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:48:12,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:48:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:48:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:48:12,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:48:12,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405747885] [2024-11-09 02:48:12,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405747885] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:48:12,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:48:12,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 02:48:12,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129734892] [2024-11-09 02:48:12,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:48:12,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 02:48:12,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:48:12,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 02:48:12,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 02:48:12,323 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-11-09 02:48:12,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 28 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:48:12,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:48:12,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-11-09 02:48:12,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:48:12,467 INFO L124 PetriNetUnfolderBase]: 439/678 cut-off events. [2024-11-09 02:48:12,467 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-11-09 02:48:12,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1586 conditions, 678 events. 439/678 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2372 event pairs, 287 based on Foata normal form. 0/677 useless extension candidates. Maximal degree in co-relation 484. Up to 641 conditions per place. [2024-11-09 02:48:12,473 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 25 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2024-11-09 02:48:12,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 29 transitions, 138 flow [2024-11-09 02:48:12,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 02:48:12,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 02:48:12,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 40 transitions. [2024-11-09 02:48:12,476 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45977011494252873 [2024-11-09 02:48:12,476 INFO L175 Difference]: Start difference. First operand has 28 places, 28 transitions, 82 flow. Second operand 3 states and 40 transitions. [2024-11-09 02:48:12,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 29 transitions, 138 flow [2024-11-09 02:48:12,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 134 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 02:48:12,478 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 90 flow [2024-11-09 02:48:12,478 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2024-11-09 02:48:12,479 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-11-09 02:48:12,479 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 90 flow [2024-11-09 02:48:12,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:48:12,480 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:48:12,480 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] [2024-11-09 02:48:12,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 02:48:12,482 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 02:48:12,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:48:12,484 INFO L85 PathProgramCache]: Analyzing trace with hash -390222636, now seen corresponding path program 1 times [2024-11-09 02:48:12,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:48:12,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238661228] [2024-11-09 02:48:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:48:12,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:48:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:48:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 02:48:12,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:48:12,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238661228] [2024-11-09 02:48:12,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238661228] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:48:12,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:48:12,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 02:48:12,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91343880] [2024-11-09 02:48:12,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:48:12,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 02:48:12,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:48:12,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 02:48:12,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 02:48:12,588 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-11-09 02:48:12,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:48:12,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:48:12,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-11-09 02:48:12,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:48:12,753 INFO L124 PetriNetUnfolderBase]: 538/782 cut-off events. [2024-11-09 02:48:12,753 INFO L125 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2024-11-09 02:48:12,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1787 conditions, 782 events. 538/782 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2437 event pairs, 170 based on Foata normal form. 0/759 useless extension candidates. Maximal degree in co-relation 1774. Up to 405 conditions per place. [2024-11-09 02:48:12,758 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 36 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-11-09 02:48:12,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 41 transitions, 204 flow [2024-11-09 02:48:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 02:48:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 02:48:12,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2024-11-09 02:48:12,760 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4396551724137931 [2024-11-09 02:48:12,761 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 90 flow. Second operand 4 states and 51 transitions. [2024-11-09 02:48:12,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 41 transitions, 204 flow [2024-11-09 02:48:12,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 198 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-09 02:48:12,763 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 105 flow [2024-11-09 02:48:12,763 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2024-11-09 02:48:12,764 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2024-11-09 02:48:12,764 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 105 flow [2024-11-09 02:48:12,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:48:12,765 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:48:12,765 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] [2024-11-09 02:48:12,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 02:48:12,766 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 02:48:12,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:48:12,767 INFO L85 PathProgramCache]: Analyzing trace with hash 13087628, now seen corresponding path program 1 times [2024-11-09 02:48:12,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:48:12,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363977658] [2024-11-09 02:48:12,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:48:12,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:48:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:48:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:48:12,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:48:12,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363977658] [2024-11-09 02:48:12,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363977658] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:48:12,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002667560] [2024-11-09 02:48:12,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:48:12,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:48:12,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:48:12,872 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:48:12,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 02:48:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:48:12,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 02:48:12,983 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:48:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:48:13,045 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:48:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:48:13,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002667560] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 02:48:13,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 02:48:13,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-11-09 02:48:13,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204410019] [2024-11-09 02:48:13,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:48:13,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 02:48:13,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:48:13,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 02:48:13,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-09 02:48:13,088 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-11-09 02:48:13,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 105 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:48:13,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:48:13,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-11-09 02:48:13,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:48:13,238 INFO L124 PetriNetUnfolderBase]: 441/667 cut-off events. [2024-11-09 02:48:13,238 INFO L125 PetriNetUnfolderBase]: For 285/285 co-relation queries the response was YES. [2024-11-09 02:48:13,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1733 conditions, 667 events. 441/667 cut-off events. For 285/285 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2221 event pairs, 196 based on Foata normal form. 50/717 useless extension candidates. Maximal degree in co-relation 1713. Up to 462 conditions per place. [2024-11-09 02:48:13,242 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 37 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2024-11-09 02:48:13,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 45 transitions, 241 flow [2024-11-09 02:48:13,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 02:48:13,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 02:48:13,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-11-09 02:48:13,244 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43448275862068964 [2024-11-09 02:48:13,244 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 105 flow. Second operand 5 states and 63 transitions. [2024-11-09 02:48:13,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 45 transitions, 241 flow [2024-11-09 02:48:13,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 45 transitions, 235 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 02:48:13,247 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 122 flow [2024-11-09 02:48:13,247 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2024-11-09 02:48:13,248 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-11-09 02:48:13,248 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 122 flow [2024-11-09 02:48:13,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:48:13,249 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:48:13,249 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] [2024-11-09 02:48:13,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 02:48:13,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:48:13,450 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 02:48:13,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:48:13,451 INFO L85 PathProgramCache]: Analyzing trace with hash -479888153, now seen corresponding path program 1 times [2024-11-09 02:48:13,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:48:13,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337508509] [2024-11-09 02:48:13,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:48:13,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:48:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:48:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:48:14,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:48:14,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337508509] [2024-11-09 02:48:14,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337508509] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:48:14,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621675691] [2024-11-09 02:48:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:48:14,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:48:14,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:48:14,960 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:48:14,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 02:48:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:48:15,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-09 02:48:15,074 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:48:15,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 02:48:15,691 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 77 treesize of output 45 [2024-11-09 02:48:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:48:15,926 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:48:17,395 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 98 treesize of output 90 [2024-11-09 02:48:17,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 02:48:17,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 124 [2024-11-09 02:48:18,082 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 416 treesize of output 376 [2024-11-09 02:48:18,187 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 02:48:18,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 691 treesize of output 675 [2024-11-09 02:48:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:48:36,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621675691] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:48:36,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:48:36,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-09 02:48:36,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110209456] [2024-11-09 02:48:36,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:48:36,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 02:48:36,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:48:36,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 02:48:36,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-11-09 02:48:36,413 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-11-09 02:48:36,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 122 flow. Second operand has 19 states, 19 states have (on average 7.842105263157895) internal successors, (149), 19 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:48:36,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:48:36,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-11-09 02:48:36,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:48:37,281 INFO L124 PetriNetUnfolderBase]: 788/1223 cut-off events. [2024-11-09 02:48:37,281 INFO L125 PetriNetUnfolderBase]: For 859/877 co-relation queries the response was YES. [2024-11-09 02:48:37,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3458 conditions, 1223 events. 788/1223 cut-off events. For 859/877 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4970 event pairs, 58 based on Foata normal form. 19/1242 useless extension candidates. Maximal degree in co-relation 2607. Up to 696 conditions per place. [2024-11-09 02:48:37,292 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 73 selfloop transitions, 23 changer transitions 1/100 dead transitions. [2024-11-09 02:48:37,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 100 transitions, 542 flow [2024-11-09 02:48:37,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 02:48:37,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 02:48:37,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 147 transitions. [2024-11-09 02:48:37,296 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.506896551724138 [2024-11-09 02:48:37,296 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 122 flow. Second operand 10 states and 147 transitions. [2024-11-09 02:48:37,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 100 transitions, 542 flow [2024-11-09 02:48:37,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 100 transitions, 526 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-09 02:48:37,303 INFO L231 Difference]: Finished difference. Result has 47 places, 49 transitions, 270 flow [2024-11-09 02:48:37,305 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=270, PETRI_PLACES=47, PETRI_TRANSITIONS=49} [2024-11-09 02:48:37,305 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 16 predicate places. [2024-11-09 02:48:37,307 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 49 transitions, 270 flow [2024-11-09 02:48:37,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.842105263157895) internal successors, (149), 19 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:48:37,308 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:48:37,308 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] [2024-11-09 02:48:37,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 02:48:37,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:48:37,510 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-09 02:48:37,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:48:37,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1128554049, now seen corresponding path program 2 times [2024-11-09 02:48:37,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:48:37,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578767462] [2024-11-09 02:48:37,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:48:37,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:48:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:48:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:48:38,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:48:38,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578767462] [2024-11-09 02:48:38,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578767462] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:48:38,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611836072] [2024-11-09 02:48:38,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 02:48:38,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:48:38,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:48:38,356 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:48:38,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 02:48:38,440 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 02:48:38,441 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:48:38,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-09 02:48:38,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:48:38,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 02:48:38,735 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 63 treesize of output 35 [2024-11-09 02:48:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:48:38,820 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:48:40,155 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 416 treesize of output 376 [2024-11-09 02:48:40,261 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 02:48:40,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 691 treesize of output 675 [2024-11-09 02:48:55,727 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts.