./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8ab0bd5 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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-simple-queue.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 608e0c2870f111f9f6921442a1f1a544ee956a8de04c7629c0edf3e54cde4da3 --- Real Ultimate output --- This is Ultimate 0.3.0-?-f8ab0bd-m [2025-03-13 21:51:26,146 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-13 21:51:26,222 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-13 21:51:26,227 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-13 21:51:26,227 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-13 21:51:26,250 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-13 21:51:26,251 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-13 21:51:26,251 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-13 21:51:26,251 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-13 21:51:26,251 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-13 21:51:26,251 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-13 21:51:26,251 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-13 21:51:26,251 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-13 21:51:26,251 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-13 21:51:26,251 INFO L153 SettingsManager]: * Use SBE=true [2025-03-13 21:51:26,251 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-13 21:51:26,251 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-13 21:51:26,252 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-13 21:51:26,252 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-13 21:51:26,252 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-13 21:51:26,252 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-13 21:51:26,252 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-13 21:51:26,252 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-13 21:51:26,252 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-13 21:51:26,252 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-13 21:51:26,252 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-13 21:51:26,252 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-13 21:51:26,252 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-13 21:51:26,252 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-13 21:51:26,252 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-13 21:51:26,252 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-13 21:51:26,252 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-13 21:51:26,252 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:51:26,252 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-13 21:51:26,252 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-13 21:51:26,252 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-13 21:51:26,253 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-13 21:51:26,253 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-13 21:51:26,253 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-13 21:51:26,253 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-13 21:51:26,253 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-13 21:51:26,253 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-13 21:51:26,253 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-13 21:51:26,253 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 608e0c2870f111f9f6921442a1f1a544ee956a8de04c7629c0edf3e54cde4da3 [2025-03-13 21:51:26,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-13 21:51:26,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-13 21:51:26,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-13 21:51:26,482 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-13 21:51:26,482 INFO L274 PluginConnector]: CDTParser initialized [2025-03-13 21:51:26,484 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2025-03-13 21:51:27,662 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74f000d11/2c546229af934c4d818982c41ecbd134/FLAGb17de49b5 [2025-03-13 21:51:27,883 INFO L384 CDTParser]: Found 1 translation units. [2025-03-13 21:51:27,883 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2025-03-13 21:51:27,890 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74f000d11/2c546229af934c4d818982c41ecbd134/FLAGb17de49b5 [2025-03-13 21:51:27,902 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74f000d11/2c546229af934c4d818982c41ecbd134 [2025-03-13 21:51:27,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-13 21:51:27,906 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-13 21:51:27,907 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-13 21:51:27,907 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-13 21:51:27,910 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-13 21:51:27,911 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:51:27" (1/1) ... [2025-03-13 21:51:27,911 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ad6f40a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:51:27, skipping insertion in model container [2025-03-13 21:51:27,912 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:51:27" (1/1) ... [2025-03-13 21:51:27,924 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-13 21:51:28,058 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-simple-queue.wvr.c[2464,2477] [2025-03-13 21:51:28,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:51:28,082 INFO L200 MainTranslator]: Completed pre-run [2025-03-13 21:51:28,104 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-simple-queue.wvr.c[2464,2477] [2025-03-13 21:51:28,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:51:28,122 INFO L204 MainTranslator]: Completed translation [2025-03-13 21:51:28,124 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:51:28 WrapperNode [2025-03-13 21:51:28,124 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-13 21:51:28,125 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-13 21:51:28,125 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-13 21:51:28,125 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-13 21:51:28,131 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:51:28" (1/1) ... [2025-03-13 21:51:28,139 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:51:28" (1/1) ... [2025-03-13 21:51:28,163 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 120 [2025-03-13 21:51:28,167 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-13 21:51:28,167 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-13 21:51:28,168 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-13 21:51:28,168 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-13 21:51:28,177 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:51:28" (1/1) ... [2025-03-13 21:51:28,177 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:51:28" (1/1) ... [2025-03-13 21:51:28,183 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:51:28" (1/1) ... [2025-03-13 21:51:28,200 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 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]. [2025-03-13 21:51:28,201 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:51:28" (1/1) ... [2025-03-13 21:51:28,202 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:51:28" (1/1) ... [2025-03-13 21:51:28,208 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:51:28" (1/1) ... [2025-03-13 21:51:28,209 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:51:28" (1/1) ... [2025-03-13 21:51:28,209 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:51:28" (1/1) ... [2025-03-13 21:51:28,210 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:51:28" (1/1) ... [2025-03-13 21:51:28,215 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-13 21:51:28,216 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-13 21:51:28,217 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-13 21:51:28,217 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-13 21:51:28,218 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:51:28" (1/1) ... [2025-03-13 21:51:28,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:51:28,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:51:28,249 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) [2025-03-13 21:51:28,259 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 [2025-03-13 21:51:28,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-13 21:51:28,275 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-13 21:51:28,275 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-13 21:51:28,275 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-13 21:51:28,275 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-13 21:51:28,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-13 21:51:28,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-13 21:51:28,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-13 21:51:28,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-13 21:51:28,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-13 21:51:28,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-13 21:51:28,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-13 21:51:28,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-13 21:51:28,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-13 21:51:28,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-13 21:51:28,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-13 21:51:28,276 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-13 21:51:28,340 INFO L256 CfgBuilder]: Building ICFG [2025-03-13 21:51:28,341 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-13 21:51:28,540 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-13 21:51:28,540 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-13 21:51:28,540 INFO L318 CfgBuilder]: Performing block encoding [2025-03-13 21:51:28,750 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-13 21:51:28,750 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:51:28 BoogieIcfgContainer [2025-03-13 21:51:28,751 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-13 21:51:28,754 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-13 21:51:28,754 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-13 21:51:28,758 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-13 21:51:28,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.03 09:51:27" (1/3) ... [2025-03-13 21:51:28,759 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b43185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:51:28, skipping insertion in model container [2025-03-13 21:51:28,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:51:28" (2/3) ... [2025-03-13 21:51:28,760 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b43185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:51:28, skipping insertion in model container [2025-03-13 21:51:28,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:51:28" (3/3) ... [2025-03-13 21:51:28,761 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2025-03-13 21:51:28,774 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-13 21:51:28,776 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-simple-queue.wvr.c that has 3 procedures, 24 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-13 21:51:28,776 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-13 21:51:28,821 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-13 21:51:28,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 28 transitions, 70 flow [2025-03-13 21:51:28,874 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2025-03-13 21:51:28,876 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-13 21:51:28,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 5/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2025-03-13 21:51:28,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 28 transitions, 70 flow [2025-03-13 21:51:28,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 25 transitions, 62 flow [2025-03-13 21:51:28,887 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-13 21:51:28,896 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;@2557b669, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-13 21:51:28,896 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-13 21:51:28,904 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-13 21:51:28,904 INFO L124 PetriNetUnfolderBase]: 5/24 cut-off events. [2025-03-13 21:51:28,904 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-13 21:51:28,905 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:51:28,905 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:51:28,906 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:51:28,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:51:28,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1076186452, now seen corresponding path program 1 times [2025-03-13 21:51:28,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:51:28,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104168413] [2025-03-13 21:51:28,917 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:51:28,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:51:28,982 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-13 21:51:28,999 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-13 21:51:28,999 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:51:29,000 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:51:29,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:51:29,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104168413] [2025-03-13 21:51:29,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104168413] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:51:29,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:51:29,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-13 21:51:29,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958186993] [2025-03-13 21:51:29,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:51:29,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-13 21:51:29,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:51:29,098 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-13 21:51:29,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-13 21:51:29,099 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-13 21:51:29,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 62 flow. Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 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) [2025-03-13 21:51:29,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:51:29,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-13 21:51:29,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:51:29,184 INFO L124 PetriNetUnfolderBase]: 122/217 cut-off events. [2025-03-13 21:51:29,184 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2025-03-13 21:51:29,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 217 events. 122/217 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 714 event pairs, 94 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 405. Up to 214 conditions per place. [2025-03-13 21:51:29,189 INFO L140 encePairwiseOnDemand]: 26/28 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2025-03-13 21:51:29,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 23 transitions, 98 flow [2025-03-13 21:51:29,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-13 21:51:29,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-03-13 21:51:29,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 32 transitions. [2025-03-13 21:51:29,200 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-03-13 21:51:29,201 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 62 flow. Second operand 2 states and 32 transitions. [2025-03-13 21:51:29,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 23 transitions, 98 flow [2025-03-13 21:51:29,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 23 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-13 21:51:29,206 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 50 flow [2025-03-13 21:51:29,208 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2025-03-13 21:51:29,211 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2025-03-13 21:51:29,212 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 50 flow [2025-03-13 21:51:29,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 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) [2025-03-13 21:51:29,212 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:51:29,212 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:51:29,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-13 21:51:29,212 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:51:29,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:51:29,213 INFO L85 PathProgramCache]: Analyzing trace with hash -108195879, now seen corresponding path program 1 times [2025-03-13 21:51:29,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:51:29,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559299800] [2025-03-13 21:51:29,214 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:51:29,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:51:29,242 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-13 21:51:29,260 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-13 21:51:29,260 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:51:29,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:51:29,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:51:29,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559299800] [2025-03-13 21:51:29,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559299800] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:51:29,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:51:29,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-13 21:51:29,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897428284] [2025-03-13 21:51:29,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:51:29,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-13 21:51:29,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:51:29,361 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-13 21:51:29,361 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-13 21:51:29,362 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-13 21:51:29,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2025-03-13 21:51:29,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:51:29,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-13 21:51:29,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:51:29,463 INFO L124 PetriNetUnfolderBase]: 203/353 cut-off events. [2025-03-13 21:51:29,464 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-03-13 21:51:29,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 353 events. 203/353 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1257 event pairs, 82 based on Foata normal form. 1/301 useless extension candidates. Maximal degree in co-relation 709. Up to 176 conditions per place. [2025-03-13 21:51:29,466 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 28 selfloop transitions, 2 changer transitions 3/36 dead transitions. [2025-03-13 21:51:29,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 36 transitions, 144 flow [2025-03-13 21:51:29,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-13 21:51:29,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-13 21:51:29,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2025-03-13 21:51:29,468 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-03-13 21:51:29,468 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 50 flow. Second operand 3 states and 49 transitions. [2025-03-13 21:51:29,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 36 transitions, 144 flow [2025-03-13 21:51:29,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-13 21:51:29,470 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 62 flow [2025-03-13 21:51:29,470 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2025-03-13 21:51:29,471 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2025-03-13 21:51:29,471 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 62 flow [2025-03-13 21:51:29,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2025-03-13 21:51:29,471 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:51:29,472 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:51:29,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-13 21:51:29,472 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:51:29,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:51:29,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1313110838, now seen corresponding path program 1 times [2025-03-13 21:51:29,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:51:29,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956303732] [2025-03-13 21:51:29,473 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:51:29,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:51:29,481 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-13 21:51:29,490 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-13 21:51:29,490 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:51:29,490 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:51:29,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:51:29,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956303732] [2025-03-13 21:51:29,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956303732] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:51:29,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:51:29,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-13 21:51:29,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052365751] [2025-03-13 21:51:29,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:51:29,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-13 21:51:29,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:51:29,570 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-13 21:51:29,570 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-13 21:51:29,570 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-13 21:51:29,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 62 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) [2025-03-13 21:51:29,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:51:29,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-13 21:51:29,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:51:29,660 INFO L124 PetriNetUnfolderBase]: 251/446 cut-off events. [2025-03-13 21:51:29,661 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2025-03-13 21:51:29,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 446 events. 251/446 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1678 event pairs, 113 based on Foata normal form. 11/385 useless extension candidates. Maximal degree in co-relation 934. Up to 306 conditions per place. [2025-03-13 21:51:29,664 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 27 selfloop transitions, 2 changer transitions 6/38 dead transitions. [2025-03-13 21:51:29,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 38 transitions, 163 flow [2025-03-13 21:51:29,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-13 21:51:29,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-13 21:51:29,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2025-03-13 21:51:29,666 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2025-03-13 21:51:29,666 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 62 flow. Second operand 3 states and 50 transitions. [2025-03-13 21:51:29,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 38 transitions, 163 flow [2025-03-13 21:51:29,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 38 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-13 21:51:29,667 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 72 flow [2025-03-13 21:51:29,667 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2025-03-13 21:51:29,668 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2025-03-13 21:51:29,668 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 72 flow [2025-03-13 21:51:29,668 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) [2025-03-13 21:51:29,668 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:51:29,668 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:51:29,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-13 21:51:29,669 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:51:29,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:51:29,669 INFO L85 PathProgramCache]: Analyzing trace with hash 845850198, now seen corresponding path program 1 times [2025-03-13 21:51:29,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:51:29,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066989175] [2025-03-13 21:51:29,670 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:51:29,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:51:29,679 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-13 21:51:29,695 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:51:29,696 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:51:29,696 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:51:29,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:51:29,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066989175] [2025-03-13 21:51:29,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066989175] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:51:29,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:51:29,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-13 21:51:29,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212585187] [2025-03-13 21:51:29,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:51:29,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:51:29,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:51:29,820 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:51:29,820 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:51:29,820 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-13 21:51:29,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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) [2025-03-13 21:51:29,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:51:29,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-13 21:51:29,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:51:29,923 INFO L124 PetriNetUnfolderBase]: 319/585 cut-off events. [2025-03-13 21:51:29,923 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2025-03-13 21:51:29,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1268 conditions, 585 events. 319/585 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2456 event pairs, 285 based on Foata normal form. 12/501 useless extension candidates. Maximal degree in co-relation 1262. Up to 443 conditions per place. [2025-03-13 21:51:29,925 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 21 selfloop transitions, 2 changer transitions 15/41 dead transitions. [2025-03-13 21:51:29,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 184 flow [2025-03-13 21:51:29,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:51:29,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:51:29,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 57 transitions. [2025-03-13 21:51:29,926 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2025-03-13 21:51:29,926 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 72 flow. Second operand 4 states and 57 transitions. [2025-03-13 21:51:29,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 184 flow [2025-03-13 21:51:29,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-13 21:51:29,927 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 84 flow [2025-03-13 21:51:29,927 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, 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=84, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2025-03-13 21:51:29,927 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2025-03-13 21:51:29,927 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 84 flow [2025-03-13 21:51:29,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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) [2025-03-13 21:51:29,928 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:51:29,928 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:51:29,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-13 21:51:29,928 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:51:29,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:51:29,928 INFO L85 PathProgramCache]: Analyzing trace with hash -77824490, now seen corresponding path program 1 times [2025-03-13 21:51:29,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:51:29,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180000389] [2025-03-13 21:51:29,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:51:29,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:51:29,935 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-13 21:51:29,961 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-13 21:51:29,961 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:51:29,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:30,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:51:30,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:51:30,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180000389] [2025-03-13 21:51:30,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180000389] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:51:30,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981269185] [2025-03-13 21:51:30,381 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:51:30,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:51:30,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:51:30,383 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) [2025-03-13 21:51:30,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-13 21:51:30,440 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-13 21:51:30,457 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-13 21:51:30,457 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:51:30,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:30,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-13 21:51:30,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:51:30,527 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 23 treesize of output 1 [2025-03-13 21:51:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:51:30,648 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:51:30,877 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 38 treesize of output 34 [2025-03-13 21:51:30,893 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-13 21:51:30,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 46 treesize of output 37 [2025-03-13 21:51:30,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:51:30,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981269185] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:51:30,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:51:30,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-03-13 21:51:30,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290341578] [2025-03-13 21:51:30,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:51:30,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-13 21:51:30,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:51:30,937 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-13 21:51:30,937 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2025-03-13 21:51:30,937 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-13 21:51:30,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 84 flow. Second operand has 15 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 states have internal predecessors, (131), 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) [2025-03-13 21:51:30,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:51:30,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-13 21:51:30,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:51:31,693 INFO L124 PetriNetUnfolderBase]: 1241/2190 cut-off events. [2025-03-13 21:51:31,693 INFO L125 PetriNetUnfolderBase]: For 324/324 co-relation queries the response was YES. [2025-03-13 21:51:31,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4812 conditions, 2190 events. 1241/2190 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 11493 event pairs, 387 based on Foata normal form. 3/1854 useless extension candidates. Maximal degree in co-relation 4804. Up to 463 conditions per place. [2025-03-13 21:51:31,702 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 141 selfloop transitions, 23 changer transitions 36/203 dead transitions. [2025-03-13 21:51:31,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 203 transitions, 943 flow [2025-03-13 21:51:31,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-13 21:51:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-13 21:51:31,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 286 transitions. [2025-03-13 21:51:31,705 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6008403361344538 [2025-03-13 21:51:31,705 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 84 flow. Second operand 17 states and 286 transitions. [2025-03-13 21:51:31,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 203 transitions, 943 flow [2025-03-13 21:51:31,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 203 transitions, 931 flow, removed 5 selfloop flow, removed 2 redundant places. [2025-03-13 21:51:31,714 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 266 flow [2025-03-13 21:51:31,714 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=266, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2025-03-13 21:51:31,715 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 27 predicate places. [2025-03-13 21:51:31,715 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 266 flow [2025-03-13 21:51:31,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 states have internal predecessors, (131), 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) [2025-03-13 21:51:31,717 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:51:31,717 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:51:31,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-13 21:51:31,921 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 [2025-03-13 21:51:31,921 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:51:31,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:51:31,922 INFO L85 PathProgramCache]: Analyzing trace with hash -568733586, now seen corresponding path program 2 times [2025-03-13 21:51:31,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:51:31,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886264460] [2025-03-13 21:51:31,922 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:51:31,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:51:31,931 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:51:31,942 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 24 of 28 statements. [2025-03-13 21:51:31,942 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:51:31,942 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-13 21:51:32,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:51:32,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886264460] [2025-03-13 21:51:32,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886264460] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:51:32,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:51:32,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:51:32,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889170807] [2025-03-13 21:51:32,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:51:32,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:51:32,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:51:32,006 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:51:32,006 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:51:32,006 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-13 21:51:32,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 266 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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) [2025-03-13 21:51:32,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:51:32,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-13 21:51:32,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:51:32,238 INFO L124 PetriNetUnfolderBase]: 1401/2462 cut-off events. [2025-03-13 21:51:32,238 INFO L125 PetriNetUnfolderBase]: For 2082/2082 co-relation queries the response was YES. [2025-03-13 21:51:32,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6119 conditions, 2462 events. 1401/2462 cut-off events. For 2082/2082 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 13182 event pairs, 360 based on Foata normal form. 1/2073 useless extension candidates. Maximal degree in co-relation 6104. Up to 729 conditions per place. [2025-03-13 21:51:32,250 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 58 selfloop transitions, 13 changer transitions 12/86 dead transitions. [2025-03-13 21:51:32,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 86 transitions, 546 flow [2025-03-13 21:51:32,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:51:32,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:51:32,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2025-03-13 21:51:32,252 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2025-03-13 21:51:32,252 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 266 flow. Second operand 5 states and 86 transitions. [2025-03-13 21:51:32,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 86 transitions, 546 flow [2025-03-13 21:51:32,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 86 transitions, 518 flow, removed 13 selfloop flow, removed 1 redundant places. [2025-03-13 21:51:32,262 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 291 flow [2025-03-13 21:51:32,263 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=291, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2025-03-13 21:51:32,263 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 31 predicate places. [2025-03-13 21:51:32,263 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 291 flow [2025-03-13 21:51:32,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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) [2025-03-13 21:51:32,263 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:51:32,263 INFO L206 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] [2025-03-13 21:51:32,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-13 21:51:32,263 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:51:32,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:51:32,264 INFO L85 PathProgramCache]: Analyzing trace with hash 585715449, now seen corresponding path program 3 times [2025-03-13 21:51:32,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:51:32,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978387939] [2025-03-13 21:51:32,264 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:51:32,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:51:32,273 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 2 equivalence classes. [2025-03-13 21:51:32,283 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-13 21:51:32,284 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:51:32,284 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:32,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:51:32,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:51:32,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978387939] [2025-03-13 21:51:32,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978387939] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:51:32,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:51:32,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-13 21:51:32,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712136809] [2025-03-13 21:51:32,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:51:32,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:51:32,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:51:32,348 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:51:32,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:51:32,348 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-13 21:51:32,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 291 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2025-03-13 21:51:32,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:51:32,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-13 21:51:32,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:51:32,593 INFO L124 PetriNetUnfolderBase]: 2006/3533 cut-off events. [2025-03-13 21:51:32,593 INFO L125 PetriNetUnfolderBase]: For 4529/4529 co-relation queries the response was YES. [2025-03-13 21:51:32,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9072 conditions, 3533 events. 2006/3533 cut-off events. For 4529/4529 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 20207 event pairs, 757 based on Foata normal form. 55/3027 useless extension candidates. Maximal degree in co-relation 9055. Up to 1236 conditions per place. [2025-03-13 21:51:32,607 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 60 selfloop transitions, 17 changer transitions 0/80 dead transitions. [2025-03-13 21:51:32,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 80 transitions, 580 flow [2025-03-13 21:51:32,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:51:32,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:51:32,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2025-03-13 21:51:32,608 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2025-03-13 21:51:32,608 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 291 flow. Second operand 4 states and 72 transitions. [2025-03-13 21:51:32,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 80 transitions, 580 flow [2025-03-13 21:51:32,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 80 transitions, 532 flow, removed 13 selfloop flow, removed 6 redundant places. [2025-03-13 21:51:32,623 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 389 flow [2025-03-13 21:51:32,623 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=389, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2025-03-13 21:51:32,624 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 27 predicate places. [2025-03-13 21:51:32,624 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 389 flow [2025-03-13 21:51:32,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2025-03-13 21:51:32,624 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:51:32,624 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:51:32,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-13 21:51:32,624 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:51:32,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:51:32,625 INFO L85 PathProgramCache]: Analyzing trace with hash 535100093, now seen corresponding path program 4 times [2025-03-13 21:51:32,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:51:32,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861724638] [2025-03-13 21:51:32,625 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:51:32,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:51:32,632 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 31 statements into 2 equivalence classes. [2025-03-13 21:51:32,643 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-13 21:51:32,643 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:51:32,643 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:51:32,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:51:32,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861724638] [2025-03-13 21:51:32,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861724638] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:51:32,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052456118] [2025-03-13 21:51:32,748 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:51:32,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:51:32,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:51:32,750 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) [2025-03-13 21:51:32,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-13 21:51:32,791 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 31 statements into 2 equivalence classes. [2025-03-13 21:51:32,808 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-13 21:51:32,808 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:51:32,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:32,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-13 21:51:32,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:51:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:51:32,878 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:51:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:51:32,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052456118] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:51:32,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:51:32,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-13 21:51:32,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546806400] [2025-03-13 21:51:32,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:51:32,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-13 21:51:32,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:51:32,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-13 21:51:32,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2025-03-13 21:51:32,943 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-13 21:51:32,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 389 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 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) [2025-03-13 21:51:32,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:51:32,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-13 21:51:32,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:51:33,206 INFO L124 PetriNetUnfolderBase]: 1505/2686 cut-off events. [2025-03-13 21:51:33,206 INFO L125 PetriNetUnfolderBase]: For 3340/3340 co-relation queries the response was YES. [2025-03-13 21:51:33,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6968 conditions, 2686 events. 1505/2686 cut-off events. For 3340/3340 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 15102 event pairs, 1260 based on Foata normal form. 22/2287 useless extension candidates. Maximal degree in co-relation 6952. Up to 2264 conditions per place. [2025-03-13 21:51:33,217 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 36 selfloop transitions, 3 changer transitions 30/72 dead transitions. [2025-03-13 21:51:33,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 72 transitions, 514 flow [2025-03-13 21:51:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-13 21:51:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-13 21:51:33,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 83 transitions. [2025-03-13 21:51:33,218 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2025-03-13 21:51:33,218 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 389 flow. Second operand 6 states and 83 transitions. [2025-03-13 21:51:33,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 72 transitions, 514 flow [2025-03-13 21:51:33,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 72 transitions, 504 flow, removed 5 selfloop flow, removed 0 redundant places. [2025-03-13 21:51:33,224 INFO L231 Difference]: Finished difference. Result has 57 places, 42 transitions, 280 flow [2025-03-13 21:51:33,224 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=280, PETRI_PLACES=57, PETRI_TRANSITIONS=42} [2025-03-13 21:51:33,225 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 30 predicate places. [2025-03-13 21:51:33,225 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 42 transitions, 280 flow [2025-03-13 21:51:33,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 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) [2025-03-13 21:51:33,225 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:51:33,225 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:51:33,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-13 21:51:33,426 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,SelfDestructingSolverStorable7 [2025-03-13 21:51:33,426 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:51:33,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:51:33,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1853865481, now seen corresponding path program 5 times [2025-03-13 21:51:33,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:51:33,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049208453] [2025-03-13 21:51:33,427 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:51:33,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:51:33,435 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-13 21:51:33,447 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-13 21:51:33,447 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:51:33,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:51:33,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:51:33,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049208453] [2025-03-13 21:51:33,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049208453] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:51:33,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959224184] [2025-03-13 21:51:33,880 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:51:33,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:51:33,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:51:33,882 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) [2025-03-13 21:51:33,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-13 21:51:33,919 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-13 21:51:33,935 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-13 21:51:33,936 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:51:33,936 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:33,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-13 21:51:33,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:51:34,229 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-13 21:51:34,230 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 [2025-03-13 21:51:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:51:34,238 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:51:34,317 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-03-13 21:51:34,318 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 [2025-03-13 21:51:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:51:34,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959224184] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:51:34,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:51:34,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2025-03-13 21:51:34,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347450344] [2025-03-13 21:51:34,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:51:34,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-13 21:51:34,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:51:34,653 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-13 21:51:34,654 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2025-03-13 21:51:34,654 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-13 21:51:34,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 42 transitions, 280 flow. Second operand has 23 states, 23 states have (on average 8.217391304347826) internal successors, (189), 23 states have internal predecessors, (189), 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) [2025-03-13 21:51:34,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:51:34,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-13 21:51:34,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:51:35,951 INFO L124 PetriNetUnfolderBase]: 3096/5413 cut-off events. [2025-03-13 21:51:35,951 INFO L125 PetriNetUnfolderBase]: For 6383/6383 co-relation queries the response was YES. [2025-03-13 21:51:35,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13989 conditions, 5413 events. 3096/5413 cut-off events. For 6383/6383 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 30993 event pairs, 866 based on Foata normal form. 36/4608 useless extension candidates. Maximal degree in co-relation 13972. Up to 1239 conditions per place. [2025-03-13 21:51:35,971 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 195 selfloop transitions, 42 changer transitions 21/261 dead transitions. [2025-03-13 21:51:35,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 261 transitions, 1653 flow [2025-03-13 21:51:35,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-13 21:51:35,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-13 21:51:35,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 340 transitions. [2025-03-13 21:51:35,973 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2025-03-13 21:51:35,973 INFO L175 Difference]: Start difference. First operand has 57 places, 42 transitions, 280 flow. Second operand 20 states and 340 transitions. [2025-03-13 21:51:35,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 261 transitions, 1653 flow [2025-03-13 21:51:35,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 261 transitions, 1581 flow, removed 33 selfloop flow, removed 5 redundant places. [2025-03-13 21:51:35,980 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 790 flow [2025-03-13 21:51:35,980 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=790, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2025-03-13 21:51:35,982 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 48 predicate places. [2025-03-13 21:51:35,982 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 790 flow [2025-03-13 21:51:35,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.217391304347826) internal successors, (189), 23 states have internal predecessors, (189), 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) [2025-03-13 21:51:35,982 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:51:35,982 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:51:35,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-13 21:51:36,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:51:36,187 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:51:36,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:51:36,187 INFO L85 PathProgramCache]: Analyzing trace with hash 555677303, now seen corresponding path program 6 times [2025-03-13 21:51:36,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:51:36,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944262109] [2025-03-13 21:51:36,188 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:51:36,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:51:36,195 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 32 statements into 3 equivalence classes. [2025-03-13 21:51:36,210 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 32 of 32 statements. [2025-03-13 21:51:36,211 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-13 21:51:36,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-13 21:51:36,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:51:36,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944262109] [2025-03-13 21:51:36,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944262109] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:51:36,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251792288] [2025-03-13 21:51:36,297 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:51:36,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:51:36,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:51:36,299 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) [2025-03-13 21:51:36,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-13 21:51:36,338 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 32 statements into 3 equivalence classes. [2025-03-13 21:51:36,369 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 32 of 32 statements. [2025-03-13 21:51:36,370 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-13 21:51:36,370 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:36,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-13 21:51:36,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:51:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-13 21:51:36,466 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:51:36,499 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-13 21:51:36,499 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 [2025-03-13 21:51:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:51:36,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251792288] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:51:36,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:51:36,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 12 [2025-03-13 21:51:36,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4953838] [2025-03-13 21:51:36,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:51:36,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-13 21:51:36,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:51:36,583 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-13 21:51:36,583 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2025-03-13 21:51:36,583 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-13 21:51:36,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 790 flow. Second operand has 13 states, 13 states have (on average 9.76923076923077) internal successors, (127), 13 states have internal predecessors, (127), 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) [2025-03-13 21:51:36,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:51:36,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-13 21:51:36,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:51:37,108 INFO L124 PetriNetUnfolderBase]: 3646/6347 cut-off events. [2025-03-13 21:51:37,108 INFO L125 PetriNetUnfolderBase]: For 11348/11348 co-relation queries the response was YES. [2025-03-13 21:51:37,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17066 conditions, 6347 events. 3646/6347 cut-off events. For 11348/11348 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 37409 event pairs, 914 based on Foata normal form. 9/5360 useless extension candidates. Maximal degree in co-relation 17042. Up to 2107 conditions per place. [2025-03-13 21:51:37,129 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 92 selfloop transitions, 32 changer transitions 24/151 dead transitions. [2025-03-13 21:51:37,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 151 transitions, 1351 flow [2025-03-13 21:51:37,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-13 21:51:37,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-13 21:51:37,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2025-03-13 21:51:37,131 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2025-03-13 21:51:37,131 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 790 flow. Second operand 7 states and 126 transitions. [2025-03-13 21:51:37,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 151 transitions, 1351 flow [2025-03-13 21:51:37,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 151 transitions, 1179 flow, removed 84 selfloop flow, removed 2 redundant places. [2025-03-13 21:51:37,145 INFO L231 Difference]: Finished difference. Result has 83 places, 87 transitions, 857 flow [2025-03-13 21:51:37,145 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=857, PETRI_PLACES=83, PETRI_TRANSITIONS=87} [2025-03-13 21:51:37,145 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 56 predicate places. [2025-03-13 21:51:37,146 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 87 transitions, 857 flow [2025-03-13 21:51:37,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.76923076923077) internal successors, (127), 13 states have internal predecessors, (127), 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) [2025-03-13 21:51:37,146 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:51:37,146 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:51:37,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-13 21:51:37,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:51:37,347 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:51:37,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:51:37,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1516497467, now seen corresponding path program 7 times [2025-03-13 21:51:37,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:51:37,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998596871] [2025-03-13 21:51:37,347 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:51:37,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:51:37,357 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-13 21:51:37,374 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-13 21:51:37,374 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:51:37,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:51:37,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:51:37,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998596871] [2025-03-13 21:51:37,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998596871] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:51:37,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757619957] [2025-03-13 21:51:37,954 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:51:37,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:51:37,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:51:37,957 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) [2025-03-13 21:51:37,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-13 21:51:37,997 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-13 21:51:38,016 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-13 21:51:38,016 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:51:38,016 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:38,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-13 21:51:38,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:51:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:51:38,132 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:51:38,158 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-03-13 21:51:38,158 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 [2025-03-13 21:51:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-13 21:51:38,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757619957] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:51:38,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:51:38,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 16 [2025-03-13 21:51:38,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774129861] [2025-03-13 21:51:38,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:51:38,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-13 21:51:38,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:51:38,181 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-13 21:51:38,181 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2025-03-13 21:51:38,181 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-13 21:51:38,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 87 transitions, 857 flow. Second operand has 17 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 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) [2025-03-13 21:51:38,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:51:38,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-13 21:51:38,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:51:39,036 INFO L124 PetriNetUnfolderBase]: 3886/6755 cut-off events. [2025-03-13 21:51:39,037 INFO L125 PetriNetUnfolderBase]: For 12558/12558 co-relation queries the response was YES. [2025-03-13 21:51:39,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18081 conditions, 6755 events. 3886/6755 cut-off events. For 12558/12558 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 39897 event pairs, 938 based on Foata normal form. 1/5701 useless extension candidates. Maximal degree in co-relation 18052. Up to 2063 conditions per place. [2025-03-13 21:51:39,064 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 128 selfloop transitions, 42 changer transitions 39/212 dead transitions. [2025-03-13 21:51:39,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 212 transitions, 1628 flow [2025-03-13 21:51:39,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-13 21:51:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-13 21:51:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 228 transitions. [2025-03-13 21:51:39,067 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2025-03-13 21:51:39,067 INFO L175 Difference]: Start difference. First operand has 83 places, 87 transitions, 857 flow. Second operand 15 states and 228 transitions. [2025-03-13 21:51:39,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 212 transitions, 1628 flow [2025-03-13 21:51:39,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 212 transitions, 1557 flow, removed 18 selfloop flow, removed 3 redundant places. [2025-03-13 21:51:39,092 INFO L231 Difference]: Finished difference. Result has 95 places, 91 transitions, 931 flow [2025-03-13 21:51:39,092 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=931, PETRI_PLACES=95, PETRI_TRANSITIONS=91} [2025-03-13 21:51:39,093 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 68 predicate places. [2025-03-13 21:51:39,093 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 91 transitions, 931 flow [2025-03-13 21:51:39,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 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) [2025-03-13 21:51:39,094 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:51:39,094 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:51:39,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-13 21:51:39,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-13 21:51:39,294 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:51:39,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:51:39,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1445031418, now seen corresponding path program 8 times [2025-03-13 21:51:39,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:51:39,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594481524] [2025-03-13 21:51:39,295 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:51:39,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:51:39,302 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-03-13 21:51:39,310 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-13 21:51:39,310 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:51:39,310 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:39,420 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:51:39,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:51:39,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594481524] [2025-03-13 21:51:39,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594481524] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:51:39,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441801921] [2025-03-13 21:51:39,421 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:51:39,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:51:39,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:51:39,423 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) [2025-03-13 21:51:39,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-13 21:51:39,458 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-03-13 21:51:39,475 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-13 21:51:39,475 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:51:39,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:39,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-13 21:51:39,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:51:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:51:39,626 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:51:39,825 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:51:39,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441801921] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:51:39,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:51:39,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2025-03-13 21:51:39,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808197553] [2025-03-13 21:51:39,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:51:39,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-13 21:51:39,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:51:39,827 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-13 21:51:39,827 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2025-03-13 21:51:39,827 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-13 21:51:39,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 91 transitions, 931 flow. Second operand has 23 states, 23 states have (on average 8.565217391304348) internal successors, (197), 23 states have internal predecessors, (197), 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) [2025-03-13 21:51:39,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:51:39,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-13 21:51:39,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:51:40,341 INFO L124 PetriNetUnfolderBase]: 2720/4789 cut-off events. [2025-03-13 21:51:40,341 INFO L125 PetriNetUnfolderBase]: For 10154/10154 co-relation queries the response was YES. [2025-03-13 21:51:40,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12919 conditions, 4789 events. 2720/4789 cut-off events. For 10154/10154 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 28397 event pairs, 832 based on Foata normal form. 66/4098 useless extension candidates. Maximal degree in co-relation 12888. Up to 1456 conditions per place. [2025-03-13 21:51:40,356 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 45 selfloop transitions, 14 changer transitions 105/167 dead transitions. [2025-03-13 21:51:40,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 167 transitions, 1236 flow [2025-03-13 21:51:40,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-13 21:51:40,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-13 21:51:40,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 201 transitions. [2025-03-13 21:51:40,363 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5521978021978022 [2025-03-13 21:51:40,363 INFO L175 Difference]: Start difference. First operand has 95 places, 91 transitions, 931 flow. Second operand 13 states and 201 transitions. [2025-03-13 21:51:40,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 167 transitions, 1236 flow [2025-03-13 21:51:40,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 167 transitions, 1094 flow, removed 19 selfloop flow, removed 17 redundant places. [2025-03-13 21:51:40,379 INFO L231 Difference]: Finished difference. Result has 85 places, 48 transitions, 388 flow [2025-03-13 21:51:40,379 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=388, PETRI_PLACES=85, PETRI_TRANSITIONS=48} [2025-03-13 21:51:40,379 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 58 predicate places. [2025-03-13 21:51:40,379 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 48 transitions, 388 flow [2025-03-13 21:51:40,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.565217391304348) internal successors, (197), 23 states have internal predecessors, (197), 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) [2025-03-13 21:51:40,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:51:40,379 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:51:40,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-13 21:51:40,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:51:40,586 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:51:40,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:51:40,587 INFO L85 PathProgramCache]: Analyzing trace with hash 157380198, now seen corresponding path program 9 times [2025-03-13 21:51:40,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:51:40,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447462672] [2025-03-13 21:51:40,587 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:51:40,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:51:40,592 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 36 statements into 3 equivalence classes. [2025-03-13 21:51:40,599 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 35 of 36 statements. [2025-03-13 21:51:40,599 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:51:40,599 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-13 21:51:40,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:51:40,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447462672] [2025-03-13 21:51:40,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447462672] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:51:40,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206627037] [2025-03-13 21:51:40,643 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:51:40,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:51:40,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:51:40,645 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) [2025-03-13 21:51:40,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-13 21:51:40,683 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 36 statements into 3 equivalence classes. [2025-03-13 21:51:40,704 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 35 of 36 statements. [2025-03-13 21:51:40,704 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:51:40,704 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:40,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-13 21:51:40,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:51:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-13 21:51:40,737 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:51:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-13 21:51:40,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206627037] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:51:40,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:51:40,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2025-03-13 21:51:40,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785412179] [2025-03-13 21:51:40,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:51:40,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-13 21:51:40,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:51:40,834 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-13 21:51:40,835 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2025-03-13 21:51:40,835 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-13 21:51:40,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 48 transitions, 388 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:51:40,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:51:40,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-13 21:51:40,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:51:41,123 INFO L124 PetriNetUnfolderBase]: 2966/5139 cut-off events. [2025-03-13 21:51:41,123 INFO L125 PetriNetUnfolderBase]: For 6390/6390 co-relation queries the response was YES. [2025-03-13 21:51:41,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13363 conditions, 5139 events. 2966/5139 cut-off events. For 6390/6390 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 29593 event pairs, 774 based on Foata normal form. 22/4360 useless extension candidates. Maximal degree in co-relation 13338. Up to 1506 conditions per place. [2025-03-13 21:51:41,139 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 76 selfloop transitions, 30 changer transitions 0/109 dead transitions. [2025-03-13 21:51:41,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 109 transitions, 947 flow [2025-03-13 21:51:41,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:51:41,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:51:41,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2025-03-13 21:51:41,140 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6642857142857143 [2025-03-13 21:51:41,140 INFO L175 Difference]: Start difference. First operand has 85 places, 48 transitions, 388 flow. Second operand 5 states and 93 transitions. [2025-03-13 21:51:41,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 109 transitions, 947 flow [2025-03-13 21:51:41,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 109 transitions, 901 flow, removed 9 selfloop flow, removed 10 redundant places. [2025-03-13 21:51:41,150 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 647 flow [2025-03-13 21:51:41,150 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=647, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2025-03-13 21:51:41,150 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 38 predicate places. [2025-03-13 21:51:41,150 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 647 flow [2025-03-13 21:51:41,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:51:41,150 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:51:41,151 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:51:41,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-13 21:51:41,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:51:41,351 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:51:41,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:51:41,353 INFO L85 PathProgramCache]: Analyzing trace with hash -19194792, now seen corresponding path program 10 times [2025-03-13 21:51:41,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:51:41,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189741685] [2025-03-13 21:51:41,353 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:51:41,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:51:41,358 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 39 statements into 2 equivalence classes. [2025-03-13 21:51:41,370 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-13 21:51:41,371 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:51:41,371 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-13 21:51:41,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:51:41,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189741685] [2025-03-13 21:51:41,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189741685] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:51:41,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366181753] [2025-03-13 21:51:41,476 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:51:41,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:51:41,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:51:41,478 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) [2025-03-13 21:51:41,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-13 21:51:41,519 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 39 statements into 2 equivalence classes. [2025-03-13 21:51:41,540 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-13 21:51:41,541 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:51:41,541 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:41,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-13 21:51:41,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:51:41,595 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 23 treesize of output 1 [2025-03-13 21:51:41,770 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-13 21:51:41,771 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 [2025-03-13 21:51:41,779 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:51:41,779 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:51:42,182 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 39 treesize of output 35 [2025-03-13 21:51:42,191 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-03-13 21:51:42,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 51 treesize of output 43 [2025-03-13 21:51:42,315 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:51:42,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366181753] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:51:42,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:51:42,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 26 [2025-03-13 21:51:42,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903036079] [2025-03-13 21:51:42,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:51:42,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-13 21:51:42,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:51:42,318 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-13 21:51:42,319 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2025-03-13 21:51:42,319 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-13 21:51:42,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 647 flow. Second operand has 27 states, 27 states have (on average 8.222222222222221) internal successors, (222), 27 states have internal predecessors, (222), 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) [2025-03-13 21:51:42,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:51:42,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-13 21:51:42,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:51:44,048 INFO L124 PetriNetUnfolderBase]: 6289/10942 cut-off events. [2025-03-13 21:51:44,049 INFO L125 PetriNetUnfolderBase]: For 16880/16880 co-relation queries the response was YES. [2025-03-13 21:51:44,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28962 conditions, 10942 events. 6289/10942 cut-off events. For 16880/16880 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 70736 event pairs, 585 based on Foata normal form. 157/9378 useless extension candidates. Maximal degree in co-relation 28940. Up to 2025 conditions per place. [2025-03-13 21:51:44,088 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 290 selfloop transitions, 90 changer transitions 126/509 dead transitions. [2025-03-13 21:51:44,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 509 transitions, 3347 flow [2025-03-13 21:51:44,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-03-13 21:51:44,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2025-03-13 21:51:44,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 664 transitions. [2025-03-13 21:51:44,090 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6240601503759399 [2025-03-13 21:51:44,090 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 647 flow. Second operand 38 states and 664 transitions. [2025-03-13 21:51:44,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 509 transitions, 3347 flow [2025-03-13 21:51:44,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 509 transitions, 3323 flow, removed 12 selfloop flow, removed 0 redundant places. [2025-03-13 21:51:44,170 INFO L231 Difference]: Finished difference. Result has 122 places, 115 transitions, 1501 flow [2025-03-13 21:51:44,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1501, PETRI_PLACES=122, PETRI_TRANSITIONS=115} [2025-03-13 21:51:44,171 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 95 predicate places. [2025-03-13 21:51:44,171 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 115 transitions, 1501 flow [2025-03-13 21:51:44,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 8.222222222222221) internal successors, (222), 27 states have internal predecessors, (222), 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) [2025-03-13 21:51:44,171 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:51:44,171 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:51:44,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-13 21:51:44,371 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,SelfDestructingSolverStorable13 [2025-03-13 21:51:44,372 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:51:44,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:51:44,372 INFO L85 PathProgramCache]: Analyzing trace with hash 2115512874, now seen corresponding path program 11 times [2025-03-13 21:51:44,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:51:44,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863273470] [2025-03-13 21:51:44,372 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:51:44,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:51:44,379 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 3 equivalence classes. [2025-03-13 21:51:44,392 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 39 of 39 statements. [2025-03-13 21:51:44,393 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-13 21:51:44,393 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:51:44,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:51:44,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863273470] [2025-03-13 21:51:44,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863273470] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:51:44,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819545786] [2025-03-13 21:51:44,764 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:51:44,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:51:44,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:51:44,766 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) [2025-03-13 21:51:44,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-13 21:51:44,804 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 3 equivalence classes. [2025-03-13 21:51:44,825 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 39 of 39 statements. [2025-03-13 21:51:44,825 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-13 21:51:44,825 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:44,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-13 21:51:44,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:51:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:51:44,952 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:51:44,975 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-03-13 21:51:44,975 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 [2025-03-13 21:51:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-13 21:51:44,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819545786] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:51:44,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:51:44,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 19 [2025-03-13 21:51:44,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380787589] [2025-03-13 21:51:44,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:51:44,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-13 21:51:44,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:51:44,995 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-13 21:51:44,995 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2025-03-13 21:51:44,995 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-13 21:51:44,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 115 transitions, 1501 flow. Second operand has 20 states, 20 states have (on average 8.35) internal successors, (167), 20 states have internal predecessors, (167), 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) [2025-03-13 21:51:44,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:51:44,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-13 21:51:44,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:51:46,828 INFO L124 PetriNetUnfolderBase]: 6607/11462 cut-off events. [2025-03-13 21:51:46,828 INFO L125 PetriNetUnfolderBase]: For 47179/47179 co-relation queries the response was YES. [2025-03-13 21:51:46,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34506 conditions, 11462 events. 6607/11462 cut-off events. For 47179/47179 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 74110 event pairs, 957 based on Foata normal form. 25/9682 useless extension candidates. Maximal degree in co-relation 34463. Up to 2125 conditions per place. [2025-03-13 21:51:46,875 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 78 selfloop transitions, 71 changer transitions 229/381 dead transitions. [2025-03-13 21:51:46,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 381 transitions, 3146 flow [2025-03-13 21:51:46,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-13 21:51:46,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-13 21:51:46,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 452 transitions. [2025-03-13 21:51:46,878 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5978835978835979 [2025-03-13 21:51:46,878 INFO L175 Difference]: Start difference. First operand has 122 places, 115 transitions, 1501 flow. Second operand 27 states and 452 transitions. [2025-03-13 21:51:46,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 381 transitions, 3146 flow [2025-03-13 21:51:47,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 381 transitions, 2873 flow, removed 132 selfloop flow, removed 6 redundant places. [2025-03-13 21:51:47,044 INFO L231 Difference]: Finished difference. Result has 149 places, 95 transitions, 1316 flow [2025-03-13 21:51:47,045 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1316, PETRI_PLACES=149, PETRI_TRANSITIONS=95} [2025-03-13 21:51:47,045 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 122 predicate places. [2025-03-13 21:51:47,045 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 95 transitions, 1316 flow [2025-03-13 21:51:47,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.35) internal successors, (167), 20 states have internal predecessors, (167), 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) [2025-03-13 21:51:47,045 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:51:47,045 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:51:47,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-13 21:51:47,245 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,SelfDestructingSolverStorable14 [2025-03-13 21:51:47,246 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:51:47,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:51:47,246 INFO L85 PathProgramCache]: Analyzing trace with hash 316175489, now seen corresponding path program 12 times [2025-03-13 21:51:47,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:51:47,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806479491] [2025-03-13 21:51:47,246 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:51:47,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:51:47,252 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 43 statements into 4 equivalence classes. [2025-03-13 21:51:47,269 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 43 of 43 statements. [2025-03-13 21:51:47,269 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-13 21:51:47,269 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-13 21:51:47,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:51:47,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806479491] [2025-03-13 21:51:47,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806479491] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:51:47,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201428873] [2025-03-13 21:51:47,341 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:51:47,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:51:47,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:51:47,343 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) [2025-03-13 21:51:47,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-13 21:51:47,391 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 43 statements into 4 equivalence classes. [2025-03-13 21:51:47,429 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 43 of 43 statements. [2025-03-13 21:51:47,430 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-03-13 21:51:47,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:47,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-13 21:51:47,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:51:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-13 21:51:47,469 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:51:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-13 21:51:47,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201428873] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:51:47,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:51:47,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 12 [2025-03-13 21:51:47,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778753804] [2025-03-13 21:51:47,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:51:47,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-13 21:51:47,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:51:47,609 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-13 21:51:47,609 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2025-03-13 21:51:47,609 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-13 21:51:47,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 95 transitions, 1316 flow. Second operand has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 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) [2025-03-13 21:51:47,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:51:47,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-13 21:51:47,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:51:48,811 INFO L124 PetriNetUnfolderBase]: 7884/13497 cut-off events. [2025-03-13 21:51:48,811 INFO L125 PetriNetUnfolderBase]: For 71010/71010 co-relation queries the response was YES. [2025-03-13 21:51:48,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43980 conditions, 13497 events. 7884/13497 cut-off events. For 71010/71010 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 88466 event pairs, 1611 based on Foata normal form. 22/11426 useless extension candidates. Maximal degree in co-relation 43928. Up to 3936 conditions per place. [2025-03-13 21:51:48,898 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 107 selfloop transitions, 87 changer transitions 0/197 dead transitions. [2025-03-13 21:51:48,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 197 transitions, 2853 flow [2025-03-13 21:51:48,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-13 21:51:48,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-13 21:51:48,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2025-03-13 21:51:48,899 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2025-03-13 21:51:48,899 INFO L175 Difference]: Start difference. First operand has 149 places, 95 transitions, 1316 flow. Second operand 6 states and 114 transitions. [2025-03-13 21:51:48,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 197 transitions, 2853 flow [2025-03-13 21:51:49,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 197 transitions, 2338 flow, removed 140 selfloop flow, removed 31 redundant places. [2025-03-13 21:51:49,077 INFO L231 Difference]: Finished difference. Result has 95 places, 141 transitions, 2037 flow [2025-03-13 21:51:49,077 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2037, PETRI_PLACES=95, PETRI_TRANSITIONS=141} [2025-03-13 21:51:49,078 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 68 predicate places. [2025-03-13 21:51:49,079 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 141 transitions, 2037 flow [2025-03-13 21:51:49,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 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) [2025-03-13 21:51:49,079 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:51:49,079 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:51:49,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-13 21:51:49,279 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,SelfDestructingSolverStorable15 [2025-03-13 21:51:49,279 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:51:49,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:51:49,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1828808805, now seen corresponding path program 13 times [2025-03-13 21:51:49,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:51:49,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967507927] [2025-03-13 21:51:49,280 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:51:49,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:51:49,286 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-13 21:51:49,296 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-13 21:51:49,296 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:51:49,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:51:49,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:51:49,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967507927] [2025-03-13 21:51:49,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967507927] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:51:49,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808500220] [2025-03-13 21:51:49,850 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:51:49,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:51:49,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:51:49,852 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) [2025-03-13 21:51:49,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-13 21:51:49,894 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-03-13 21:51:49,915 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-03-13 21:51:49,915 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:51:49,915 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:49,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-13 21:51:49,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:51:50,292 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-13 21:51:50,292 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 [2025-03-13 21:51:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:51:50,299 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:51:50,328 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-13 21:51:50,328 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 [2025-03-13 21:51:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:51:50,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808500220] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:51:50,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:51:50,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 41 [2025-03-13 21:51:50,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773294061] [2025-03-13 21:51:50,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:51:50,977 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-03-13 21:51:50,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:51:50,978 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-03-13 21:51:50,978 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2025-03-13 21:51:50,978 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-13 21:51:50,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 141 transitions, 2037 flow. Second operand has 42 states, 42 states have (on average 7.642857142857143) internal successors, (321), 42 states have internal predecessors, (321), 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) [2025-03-13 21:51:50,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:51:50,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-13 21:51:50,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:51:55,175 INFO L124 PetriNetUnfolderBase]: 16905/29137 cut-off events. [2025-03-13 21:51:55,175 INFO L125 PetriNetUnfolderBase]: For 90051/90051 co-relation queries the response was YES. [2025-03-13 21:51:55,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86205 conditions, 29137 events. 16905/29137 cut-off events. For 90051/90051 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 217635 event pairs, 1308 based on Foata normal form. 291/24868 useless extension candidates. Maximal degree in co-relation 86171. Up to 5400 conditions per place. [2025-03-13 21:51:55,394 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 391 selfloop transitions, 245 changer transitions 146/785 dead transitions. [2025-03-13 21:51:55,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 785 transitions, 7382 flow [2025-03-13 21:51:55,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2025-03-13 21:51:55,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2025-03-13 21:51:55,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 854 transitions. [2025-03-13 21:51:55,397 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.61 [2025-03-13 21:51:55,397 INFO L175 Difference]: Start difference. First operand has 95 places, 141 transitions, 2037 flow. Second operand 50 states and 854 transitions. [2025-03-13 21:51:55,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 785 transitions, 7382 flow [2025-03-13 21:51:55,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 785 transitions, 7207 flow, removed 83 selfloop flow, removed 1 redundant places. [2025-03-13 21:51:55,670 INFO L231 Difference]: Finished difference. Result has 167 places, 282 transitions, 4971 flow [2025-03-13 21:51:55,670 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1962, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=4971, PETRI_PLACES=167, PETRI_TRANSITIONS=282} [2025-03-13 21:51:55,671 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 140 predicate places. [2025-03-13 21:51:55,671 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 282 transitions, 4971 flow [2025-03-13 21:51:55,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 7.642857142857143) internal successors, (321), 42 states have internal predecessors, (321), 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) [2025-03-13 21:51:55,671 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:51:55,671 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:51:55,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-13 21:51:55,871 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,SelfDestructingSolverStorable16 [2025-03-13 21:51:55,872 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:51:55,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:51:55,872 INFO L85 PathProgramCache]: Analyzing trace with hash -159238147, now seen corresponding path program 14 times [2025-03-13 21:51:55,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:51:55,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527209265] [2025-03-13 21:51:55,872 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:51:55,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:51:55,879 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-03-13 21:51:55,910 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-03-13 21:51:55,910 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:51:55,911 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:56,195 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-13 21:51:56,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:51:56,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527209265] [2025-03-13 21:51:56,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527209265] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:51:56,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28230836] [2025-03-13 21:51:56,195 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:51:56,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:51:56,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:51:56,197 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) [2025-03-13 21:51:56,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-13 21:51:56,240 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 46 statements into 2 equivalence classes. [2025-03-13 21:51:56,262 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-03-13 21:51:56,263 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:51:56,263 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:51:56,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-13 21:51:56,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:51:56,672 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-13 21:51:56,672 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:51:56,935 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-13 21:51:56,935 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 [2025-03-13 21:51:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-13 21:51:57,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28230836] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:51:57,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:51:57,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2025-03-13 21:51:57,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772247950] [2025-03-13 21:51:57,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:51:57,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-13 21:51:57,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:51:57,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-13 21:51:57,200 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2025-03-13 21:51:57,200 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-13 21:51:57,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 282 transitions, 4971 flow. Second operand has 35 states, 35 states have (on average 7.885714285714286) internal successors, (276), 35 states have internal predecessors, (276), 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) [2025-03-13 21:51:57,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:51:57,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-13 21:51:57,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:52:04,661 INFO L124 PetriNetUnfolderBase]: 39643/68334 cut-off events. [2025-03-13 21:52:04,661 INFO L125 PetriNetUnfolderBase]: For 365129/365129 co-relation queries the response was YES. [2025-03-13 21:52:05,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220552 conditions, 68334 events. 39643/68334 cut-off events. For 365129/365129 co-relation queries the response was YES. Maximal size of possible extension queue 1726. Compared 596293 event pairs, 15162 based on Foata normal form. 319/57941 useless extension candidates. Maximal degree in co-relation 220494. Up to 15062 conditions per place. [2025-03-13 21:52:05,564 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 164 selfloop transitions, 14 changer transitions 691/872 dead transitions. [2025-03-13 21:52:05,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 872 transitions, 14184 flow [2025-03-13 21:52:05,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-13 21:52:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-13 21:52:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 395 transitions. [2025-03-13 21:52:05,566 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2025-03-13 21:52:05,566 INFO L175 Difference]: Start difference. First operand has 167 places, 282 transitions, 4971 flow. Second operand 25 states and 395 transitions. [2025-03-13 21:52:05,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 872 transitions, 14184 flow [2025-03-13 21:52:10,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 872 transitions, 13289 flow, removed 387 selfloop flow, removed 8 redundant places. [2025-03-13 21:52:10,012 INFO L231 Difference]: Finished difference. Result has 191 places, 172 transitions, 2909 flow [2025-03-13 21:52:10,012 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4438, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2909, PETRI_PLACES=191, PETRI_TRANSITIONS=172} [2025-03-13 21:52:10,013 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 164 predicate places. [2025-03-13 21:52:10,013 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 172 transitions, 2909 flow [2025-03-13 21:52:10,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 7.885714285714286) internal successors, (276), 35 states have internal predecessors, (276), 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) [2025-03-13 21:52:10,013 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:52:10,013 INFO L206 CegarLoopForPetriNet]: trace histogram [7, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:52:10,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-13 21:52:10,213 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,SelfDestructingSolverStorable17 [2025-03-13 21:52:10,214 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:52:10,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:52:10,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1396919937, now seen corresponding path program 15 times [2025-03-13 21:52:10,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:52:10,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746842976] [2025-03-13 21:52:10,214 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:52:10,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:52:10,222 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 5 equivalence classes. [2025-03-13 21:52:10,246 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 48 of 49 statements. [2025-03-13 21:52:10,247 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-13 21:52:10,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:52:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-13 21:52:10,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:52:10,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746842976] [2025-03-13 21:52:10,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746842976] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:52:10,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680072017] [2025-03-13 21:52:10,408 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:52:10,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:52:10,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:52:10,410 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) [2025-03-13 21:52:10,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-13 21:52:10,460 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 5 equivalence classes. [2025-03-13 21:52:10,564 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 48 of 49 statements. [2025-03-13 21:52:10,564 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-13 21:52:10,564 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:52:10,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-13 21:52:10,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:52:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-13 21:52:10,826 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:52:11,052 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-13 21:52:11,053 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 [2025-03-13 21:52:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-03-13 21:52:11,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680072017] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:52:11,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:52:11,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2025-03-13 21:52:11,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952232741] [2025-03-13 21:52:11,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:52:11,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-13 21:52:11,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:52:11,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-13 21:52:11,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2025-03-13 21:52:11,196 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-13 21:52:11,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 172 transitions, 2909 flow. Second operand has 27 states, 27 states have (on average 9.074074074074074) internal successors, (245), 27 states have internal predecessors, (245), 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) [2025-03-13 21:52:11,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:52:11,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-13 21:52:11,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:52:15,676 INFO L124 PetriNetUnfolderBase]: 17633/30082 cut-off events. [2025-03-13 21:52:15,676 INFO L125 PetriNetUnfolderBase]: For 257655/257655 co-relation queries the response was YES. [2025-03-13 21:52:15,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106850 conditions, 30082 events. 17633/30082 cut-off events. For 257655/257655 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 222937 event pairs, 1244 based on Foata normal form. 43/25468 useless extension candidates. Maximal degree in co-relation 106786. Up to 5525 conditions per place. [2025-03-13 21:52:15,873 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 0 selfloop transitions, 0 changer transitions 561/561 dead transitions. [2025-03-13 21:52:15,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 561 transitions, 7381 flow [2025-03-13 21:52:15,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-13 21:52:15,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-13 21:52:15,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 480 transitions. [2025-03-13 21:52:15,874 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6593406593406593 [2025-03-13 21:52:15,874 INFO L175 Difference]: Start difference. First operand has 191 places, 172 transitions, 2909 flow. Second operand 26 states and 480 transitions. [2025-03-13 21:52:15,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 561 transitions, 7381 flow [2025-03-13 21:52:16,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 561 transitions, 5307 flow, removed 601 selfloop flow, removed 47 redundant places. [2025-03-13 21:52:16,405 INFO L231 Difference]: Finished difference. Result has 128 places, 0 transitions, 0 flow [2025-03-13 21:52:16,405 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=0, PETRI_PLACES=128, PETRI_TRANSITIONS=0} [2025-03-13 21:52:16,406 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 101 predicate places. [2025-03-13 21:52:16,406 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 0 transitions, 0 flow [2025-03-13 21:52:16,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 9.074074074074074) internal successors, (245), 27 states have internal predecessors, (245), 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) [2025-03-13 21:52:16,408 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-03-13 21:52:16,408 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-03-13 21:52:16,408 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-03-13 21:52:16,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-13 21:52:16,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:52:16,609 INFO L422 BasicCegarLoop]: Path program histogram: [15, 1, 1, 1, 1] [2025-03-13 21:52:16,611 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-03-13 21:52:16,612 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-13 21:52:16,614 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.03 09:52:16 BasicIcfg [2025-03-13 21:52:16,614 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-13 21:52:16,615 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-13 21:52:16,615 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-13 21:52:16,615 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-13 21:52:16,616 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:51:28" (3/4) ... [2025-03-13 21:52:16,617 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-13 21:52:16,619 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread1 [2025-03-13 21:52:16,619 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure thread2 [2025-03-13 21:52:16,621 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 78 nodes and edges [2025-03-13 21:52:16,621 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2025-03-13 21:52:16,622 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2025-03-13 21:52:16,622 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2025-03-13 21:52:16,690 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-13 21:52:16,691 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-13 21:52:16,691 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-13 21:52:16,692 INFO L158 Benchmark]: Toolchain (without parser) took 48786.17ms. Allocated memory was 167.8MB in the beginning and 6.3GB in the end (delta: 6.2GB). Free memory was 128.9MB in the beginning and 4.4GB in the end (delta: -4.2GB). Peak memory consumption was 1.9GB. Max. memory is 16.1GB. [2025-03-13 21:52:16,693 INFO L158 Benchmark]: CDTParser took 0.53ms. Allocated memory is still 192.9MB. Free memory is still 117.4MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-13 21:52:16,693 INFO L158 Benchmark]: CACSL2BoogieTranslator took 217.92ms. Allocated memory is still 167.8MB. Free memory was 128.9MB in the beginning and 117.0MB in the end (delta: 11.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-13 21:52:16,693 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.79ms. Allocated memory is still 167.8MB. Free memory was 117.0MB in the beginning and 115.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-13 21:52:16,694 INFO L158 Benchmark]: Boogie Preprocessor took 48.01ms. Allocated memory is still 167.8MB. Free memory was 115.3MB in the beginning and 113.9MB in the end (delta: 1.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-13 21:52:16,694 INFO L158 Benchmark]: IcfgBuilder took 535.41ms. Allocated memory is still 167.8MB. Free memory was 113.9MB in the beginning and 73.5MB in the end (delta: 40.4MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2025-03-13 21:52:16,694 INFO L158 Benchmark]: TraceAbstraction took 47860.71ms. Allocated memory was 167.8MB in the beginning and 6.3GB in the end (delta: 6.2GB). Free memory was 73.1MB in the beginning and 4.4GB in the end (delta: -4.3GB). Peak memory consumption was 2.2GB. Max. memory is 16.1GB. [2025-03-13 21:52:16,694 INFO L158 Benchmark]: Witness Printer took 76.34ms. Allocated memory is still 6.3GB. Free memory was 4.4GB in the beginning and 4.4GB in the end (delta: 4.4MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-13 21:52:16,695 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53ms. Allocated memory is still 192.9MB. Free memory is still 117.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 217.92ms. Allocated memory is still 167.8MB. Free memory was 128.9MB in the beginning and 117.0MB in the end (delta: 11.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.79ms. Allocated memory is still 167.8MB. Free memory was 117.0MB in the beginning and 115.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 48.01ms. Allocated memory is still 167.8MB. Free memory was 115.3MB in the beginning and 113.9MB in the end (delta: 1.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * IcfgBuilder took 535.41ms. Allocated memory is still 167.8MB. Free memory was 113.9MB in the beginning and 73.5MB in the end (delta: 40.4MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * TraceAbstraction took 47860.71ms. Allocated memory was 167.8MB in the beginning and 6.3GB in the end (delta: 6.2GB). Free memory was 73.1MB in the beginning and 4.4GB in the end (delta: -4.3GB). Peak memory consumption was 2.2GB. Max. memory is 16.1GB. * Witness Printer took 76.34ms. Allocated memory is still 6.3GB. Free memory was 4.4GB in the beginning and 4.4GB in the end (delta: 4.4MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 86]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 38 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 47.8s, OverallIterations: 19, TraceHistogramMax: 7, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 33.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5388 SdHoareTripleChecker+Valid, 5.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5388 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 4.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 295 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10645 IncrementalHoareTripleChecker+Invalid, 10940 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 295 mSolverCounterUnsat, 0 mSDtfsCounter, 10645 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1272 GetRequests, 818 SyntacticMatches, 1 SemanticMatches, 453 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4836 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4971occurred in iteration=17, InterpolantAutomatonStates: 276, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 9.7s InterpolantComputationTime, 1107 NumberOfCodeBlocks, 1099 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 1548 ConstructedInterpolants, 76 QuantifiedInterpolants, 14285 SizeOfPredicates, 88 NumberOfNonLiveVariables, 2395 ConjunctsInSsa, 214 ConjunctsInUnsatCore, 45 InterpolantComputations, 6 PerfectInterpolantSequences, 387/869 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-03-13 21:52:16,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE