./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-commit-1.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-commit-1.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 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e --- Real Ultimate output --- This is Ultimate 0.3.0-?-f8ab0bd-m [2025-03-13 21:46:34,681 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-13 21:46:34,745 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-13 21:46:34,752 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-13 21:46:34,755 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-13 21:46:34,777 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-13 21:46:34,779 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-13 21:46:34,779 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-13 21:46:34,779 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-13 21:46:34,780 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-13 21:46:34,780 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-13 21:46:34,780 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-13 21:46:34,781 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-13 21:46:34,781 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-13 21:46:34,781 INFO L153 SettingsManager]: * Use SBE=true [2025-03-13 21:46:34,781 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-13 21:46:34,781 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-13 21:46:34,782 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-13 21:46:34,782 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-13 21:46:34,782 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-13 21:46:34,782 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-13 21:46:34,782 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-13 21:46:34,782 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-13 21:46:34,782 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-13 21:46:34,782 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-13 21:46:34,782 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-13 21:46:34,782 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-13 21:46:34,782 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-13 21:46:34,782 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-13 21:46:34,782 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-13 21:46:34,782 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-13 21:46:34,783 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-13 21:46:34,783 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:46:34,783 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-13 21:46:34,783 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-13 21:46:34,783 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-13 21:46:34,783 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-13 21:46:34,783 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-13 21:46:34,784 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-13 21:46:34,784 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-13 21:46:34,784 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-13 21:46:34,784 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-13 21:46:34,784 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-13 21:46:34,784 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 -> 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e [2025-03-13 21:46:35,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-13 21:46:35,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-13 21:46:35,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-13 21:46:35,020 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-13 21:46:35,021 INFO L274 PluginConnector]: CDTParser initialized [2025-03-13 21:46:35,022 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2025-03-13 21:46:36,221 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a944db1f5/540e127115fb4f2f83c4084a0af856d9/FLAGf9b70ffae [2025-03-13 21:46:36,509 INFO L384 CDTParser]: Found 1 translation units. [2025-03-13 21:46:36,510 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2025-03-13 21:46:36,519 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a944db1f5/540e127115fb4f2f83c4084a0af856d9/FLAGf9b70ffae [2025-03-13 21:46:36,791 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a944db1f5/540e127115fb4f2f83c4084a0af856d9 [2025-03-13 21:46:36,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-13 21:46:36,794 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-13 21:46:36,795 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-13 21:46:36,795 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-13 21:46:36,798 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-13 21:46:36,799 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:46:36" (1/1) ... [2025-03-13 21:46:36,801 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f794e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:36, skipping insertion in model container [2025-03-13 21:46:36,801 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:46:36" (1/1) ... [2025-03-13 21:46:36,814 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-13 21:46:36,953 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-commit-1.wvr.c[4643,4656] [2025-03-13 21:46:36,962 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:46:36,975 INFO L200 MainTranslator]: Completed pre-run [2025-03-13 21:46:36,999 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-commit-1.wvr.c[4643,4656] [2025-03-13 21:46:37,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:46:37,021 INFO L204 MainTranslator]: Completed translation [2025-03-13 21:46:37,022 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:37 WrapperNode [2025-03-13 21:46:37,022 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-13 21:46:37,023 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-13 21:46:37,023 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-13 21:46:37,023 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-13 21:46:37,028 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:37" (1/1) ... [2025-03-13 21:46:37,035 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:37" (1/1) ... [2025-03-13 21:46:37,065 INFO L138 Inliner]: procedures = 24, calls = 53, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 325 [2025-03-13 21:46:37,065 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-13 21:46:37,066 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-13 21:46:37,067 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-13 21:46:37,068 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-13 21:46:37,073 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:37" (1/1) ... [2025-03-13 21:46:37,074 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:37" (1/1) ... [2025-03-13 21:46:37,076 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:37" (1/1) ... [2025-03-13 21:46:37,098 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-03-13 21:46:37,099 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:37" (1/1) ... [2025-03-13 21:46:37,099 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:37" (1/1) ... [2025-03-13 21:46:37,110 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:37" (1/1) ... [2025-03-13 21:46:37,112 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:37" (1/1) ... [2025-03-13 21:46:37,116 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:37" (1/1) ... [2025-03-13 21:46:37,117 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:37" (1/1) ... [2025-03-13 21:46:37,122 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-13 21:46:37,122 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-13 21:46:37,122 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-13 21:46:37,123 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-13 21:46:37,123 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:37" (1/1) ... [2025-03-13 21:46:37,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:46:37,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:37,153 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 21:46:37,155 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 21:46:37,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-13 21:46:37,172 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-13 21:46:37,172 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-13 21:46:37,172 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-13 21:46:37,172 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-13 21:46:37,172 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-13 21:46:37,172 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-13 21:46:37,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-13 21:46:37,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-13 21:46:37,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-13 21:46:37,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-13 21:46:37,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-13 21:46:37,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-13 21:46:37,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-13 21:46:37,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-13 21:46:37,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-13 21:46:37,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-13 21:46:37,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-13 21:46:37,174 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 21:46:37,255 INFO L256 CfgBuilder]: Building ICFG [2025-03-13 21:46:37,257 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-13 21:46:37,710 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-13 21:46:37,711 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-13 21:46:37,711 INFO L318 CfgBuilder]: Performing block encoding [2025-03-13 21:46:38,055 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-13 21:46:38,055 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:46:38 BoogieIcfgContainer [2025-03-13 21:46:38,055 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-13 21:46:38,057 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-13 21:46:38,058 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-13 21:46:38,061 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-13 21:46:38,061 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.03 09:46:36" (1/3) ... [2025-03-13 21:46:38,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6714e0fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:46:38, skipping insertion in model container [2025-03-13 21:46:38,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:46:37" (2/3) ... [2025-03-13 21:46:38,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6714e0fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:46:38, skipping insertion in model container [2025-03-13 21:46:38,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:46:38" (3/3) ... [2025-03-13 21:46:38,063 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2025-03-13 21:46:38,076 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-13 21:46:38,078 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-commit-1.wvr.c that has 4 procedures, 40 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-03-13 21:46:38,078 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-13 21:46:38,124 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-13 21:46:38,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 48 transitions, 117 flow [2025-03-13 21:46:38,182 INFO L124 PetriNetUnfolderBase]: 9/45 cut-off events. [2025-03-13 21:46:38,185 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-13 21:46:38,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 45 events. 9/45 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 74 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2025-03-13 21:46:38,193 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 48 transitions, 117 flow [2025-03-13 21:46:38,195 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 44 transitions, 106 flow [2025-03-13 21:46:38,200 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-13 21:46:38,212 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;@49b713c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-13 21:46:38,212 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-13 21:46:38,228 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-13 21:46:38,229 INFO L124 PetriNetUnfolderBase]: 9/43 cut-off events. [2025-03-13 21:46:38,229 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-13 21:46:38,229 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:38,230 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:38,230 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:46:38,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:38,235 INFO L85 PathProgramCache]: Analyzing trace with hash -569557458, now seen corresponding path program 1 times [2025-03-13 21:46:38,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:38,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858919666] [2025-03-13 21:46:38,241 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:46:38,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:38,306 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-13 21:46:38,345 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-13 21:46:38,346 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:38,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:38,425 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 21:46:38,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:38,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858919666] [2025-03-13 21:46:38,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858919666] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:46:38,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:46:38,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-13 21:46:38,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764530822] [2025-03-13 21:46:38,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:46:38,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-13 21:46:38,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:38,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-13 21:46:38,449 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-13 21:46:38,450 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-13 21:46:38,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:38,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:38,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-13 21:46:38,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:38,851 INFO L124 PetriNetUnfolderBase]: 2548/3637 cut-off events. [2025-03-13 21:46:38,852 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2025-03-13 21:46:38,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7470 conditions, 3637 events. 2548/3637 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 16654 event pairs, 2146 based on Foata normal form. 0/3229 useless extension candidates. Maximal degree in co-relation 7063. Up to 3626 conditions per place. [2025-03-13 21:46:38,875 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 37 selfloop transitions, 0 changer transitions 0/41 dead transitions. [2025-03-13 21:46:38,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 174 flow [2025-03-13 21:46:38,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-13 21:46:38,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-03-13 21:46:38,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 54 transitions. [2025-03-13 21:46:38,884 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2025-03-13 21:46:38,885 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 106 flow. Second operand 2 states and 54 transitions. [2025-03-13 21:46:38,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 174 flow [2025-03-13 21:46:38,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 162 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-13 21:46:38,892 INFO L231 Difference]: Finished difference. Result has 40 places, 41 transitions, 88 flow [2025-03-13 21:46:38,894 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=88, PETRI_PLACES=40, PETRI_TRANSITIONS=41} [2025-03-13 21:46:38,896 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, -5 predicate places. [2025-03-13 21:46:38,896 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 41 transitions, 88 flow [2025-03-13 21:46:38,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:38,896 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:38,896 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:38,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-13 21:46:38,898 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:46:38,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:38,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1361167108, now seen corresponding path program 1 times [2025-03-13 21:46:38,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:38,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733466886] [2025-03-13 21:46:38,899 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:46:38,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:38,912 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-13 21:46:38,946 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-13 21:46:38,947 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:38,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:39,120 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 21:46:39,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:39,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733466886] [2025-03-13 21:46:39,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733466886] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:46:39,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:46:39,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-13 21:46:39,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980429290] [2025-03-13 21:46:39,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:46:39,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-13 21:46:39,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:39,123 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-13 21:46:39,123 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-13 21:46:39,123 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-13 21:46:39,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 41 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:39,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:39,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-13 21:46:39,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:39,506 INFO L124 PetriNetUnfolderBase]: 3499/4990 cut-off events. [2025-03-13 21:46:39,506 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2025-03-13 21:46:39,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10072 conditions, 4990 events. 3499/4990 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24953 event pairs, 876 based on Foata normal form. 1/4374 useless extension candidates. Maximal degree in co-relation 10069. Up to 3852 conditions per place. [2025-03-13 21:46:39,527 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 56 selfloop transitions, 4 changer transitions 1/65 dead transitions. [2025-03-13 21:46:39,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 65 transitions, 263 flow [2025-03-13 21:46:39,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-13 21:46:39,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-13 21:46:39,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2025-03-13 21:46:39,529 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2025-03-13 21:46:39,529 INFO L175 Difference]: Start difference. First operand has 40 places, 41 transitions, 88 flow. Second operand 3 states and 83 transitions. [2025-03-13 21:46:39,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 65 transitions, 263 flow [2025-03-13 21:46:39,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 65 transitions, 263 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-13 21:46:39,533 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 114 flow [2025-03-13 21:46:39,533 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2025-03-13 21:46:39,534 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, -2 predicate places. [2025-03-13 21:46:39,534 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 114 flow [2025-03-13 21:46:39,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:39,534 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:39,534 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:39,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-13 21:46:39,534 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:46:39,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:39,535 INFO L85 PathProgramCache]: Analyzing trace with hash 2012511443, now seen corresponding path program 1 times [2025-03-13 21:46:39,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:39,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269505535] [2025-03-13 21:46:39,535 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:46:39,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:39,545 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-13 21:46:39,560 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-13 21:46:39,560 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:39,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:39,638 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 21:46:39,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:39,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269505535] [2025-03-13 21:46:39,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269505535] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:46:39,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:46:39,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-13 21:46:39,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316735000] [2025-03-13 21:46:39,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:46:39,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-13 21:46:39,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:39,639 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-13 21:46:39,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-13 21:46:39,639 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-13 21:46:39,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:39,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:39,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-13 21:46:39,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:40,110 INFO L124 PetriNetUnfolderBase]: 4090/5894 cut-off events. [2025-03-13 21:46:40,110 INFO L125 PetriNetUnfolderBase]: For 545/545 co-relation queries the response was YES. [2025-03-13 21:46:40,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12635 conditions, 5894 events. 4090/5894 cut-off events. For 545/545 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 29483 event pairs, 1812 based on Foata normal form. 158/5255 useless extension candidates. Maximal degree in co-relation 12630. Up to 3358 conditions per place. [2025-03-13 21:46:40,145 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 62 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2025-03-13 21:46:40,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 68 transitions, 298 flow [2025-03-13 21:46:40,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-13 21:46:40,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-13 21:46:40,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2025-03-13 21:46:40,147 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-03-13 21:46:40,147 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 114 flow. Second operand 3 states and 84 transitions. [2025-03-13 21:46:40,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 68 transitions, 298 flow [2025-03-13 21:46:40,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 68 transitions, 295 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-13 21:46:40,149 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 118 flow [2025-03-13 21:46:40,149 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2025-03-13 21:46:40,150 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2025-03-13 21:46:40,150 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 118 flow [2025-03-13 21:46:40,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:40,150 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:40,150 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:40,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-13 21:46:40,151 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:46:40,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:40,151 INFO L85 PathProgramCache]: Analyzing trace with hash -700640505, now seen corresponding path program 1 times [2025-03-13 21:46:40,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:40,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845449049] [2025-03-13 21:46:40,152 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:46:40,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:40,163 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-13 21:46:40,178 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-13 21:46:40,178 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:40,179 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:46:40,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:40,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845449049] [2025-03-13 21:46:40,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845449049] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:46:40,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:46:40,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-13 21:46:40,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49201162] [2025-03-13 21:46:40,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:46:40,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-13 21:46:40,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:40,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-13 21:46:40,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-13 21:46:40,280 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-13 21:46:40,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:40,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:40,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-13 21:46:40,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:40,666 INFO L124 PetriNetUnfolderBase]: 3703/5358 cut-off events. [2025-03-13 21:46:40,667 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2025-03-13 21:46:40,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11720 conditions, 5358 events. 3703/5358 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 25987 event pairs, 1373 based on Foata normal form. 94/4783 useless extension candidates. Maximal degree in co-relation 11714. Up to 3376 conditions per place. [2025-03-13 21:46:40,689 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 57 selfloop transitions, 2 changer transitions 5/68 dead transitions. [2025-03-13 21:46:40,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 68 transitions, 301 flow [2025-03-13 21:46:40,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-13 21:46:40,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-13 21:46:40,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2025-03-13 21:46:40,691 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2025-03-13 21:46:40,691 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 118 flow. Second operand 3 states and 86 transitions. [2025-03-13 21:46:40,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 68 transitions, 301 flow [2025-03-13 21:46:40,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 68 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-13 21:46:40,692 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 124 flow [2025-03-13 21:46:40,693 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2025-03-13 21:46:40,693 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2025-03-13 21:46:40,693 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 124 flow [2025-03-13 21:46:40,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:40,693 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:40,693 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:40,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-13 21:46:40,694 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:46:40,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:40,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1078075590, now seen corresponding path program 1 times [2025-03-13 21:46:40,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:40,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601739535] [2025-03-13 21:46:40,694 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:46:40,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:40,706 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-13 21:46:40,716 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-13 21:46:40,716 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:40,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:40,787 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 21:46:40,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:40,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601739535] [2025-03-13 21:46:40,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601739535] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:46:40,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:46:40,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-13 21:46:40,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208111549] [2025-03-13 21:46:40,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:46:40,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-13 21:46:40,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:40,789 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-13 21:46:40,789 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-13 21:46:40,789 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-13 21:46:40,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:40,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:40,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-13 21:46:40,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:41,009 INFO L124 PetriNetUnfolderBase]: 2561/3734 cut-off events. [2025-03-13 21:46:41,009 INFO L125 PetriNetUnfolderBase]: For 801/801 co-relation queries the response was YES. [2025-03-13 21:46:41,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8250 conditions, 3734 events. 2561/3734 cut-off events. For 801/801 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16265 event pairs, 1346 based on Foata normal form. 62/3266 useless extension candidates. Maximal degree in co-relation 8243. Up to 2767 conditions per place. [2025-03-13 21:46:41,023 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 48 selfloop transitions, 2 changer transitions 7/61 dead transitions. [2025-03-13 21:46:41,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 61 transitions, 275 flow [2025-03-13 21:46:41,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-13 21:46:41,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-13 21:46:41,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2025-03-13 21:46:41,025 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2025-03-13 21:46:41,026 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 124 flow. Second operand 3 states and 76 transitions. [2025-03-13 21:46:41,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 61 transitions, 275 flow [2025-03-13 21:46:41,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 273 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-13 21:46:41,027 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 134 flow [2025-03-13 21:46:41,027 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2025-03-13 21:46:41,027 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2025-03-13 21:46:41,027 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 134 flow [2025-03-13 21:46:41,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:46:41,028 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:41,028 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:41,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-13 21:46:41,028 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:46:41,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:41,028 INFO L85 PathProgramCache]: Analyzing trace with hash -914143491, now seen corresponding path program 1 times [2025-03-13 21:46:41,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:41,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634635313] [2025-03-13 21:46:41,028 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:46:41,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:41,037 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-13 21:46:41,047 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-13 21:46:41,047 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:41,047 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:41,151 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 21:46:41,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:41,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634635313] [2025-03-13 21:46:41,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634635313] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:46:41,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:46:41,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-13 21:46:41,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629309204] [2025-03-13 21:46:41,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:46:41,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:46:41,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:41,153 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:46:41,153 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:46:41,154 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-13 21:46:41,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 21:46:41,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:41,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-13 21:46:41,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:41,443 INFO L124 PetriNetUnfolderBase]: 3173/4706 cut-off events. [2025-03-13 21:46:41,443 INFO L125 PetriNetUnfolderBase]: For 773/773 co-relation queries the response was YES. [2025-03-13 21:46:41,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10442 conditions, 4706 events. 3173/4706 cut-off events. For 773/773 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 22227 event pairs, 2856 based on Foata normal form. 56/4044 useless extension candidates. Maximal degree in co-relation 10434. Up to 3723 conditions per place. [2025-03-13 21:46:41,456 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 40 selfloop transitions, 2 changer transitions 30/76 dead transitions. [2025-03-13 21:46:41,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 76 transitions, 346 flow [2025-03-13 21:46:41,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:46:41,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:46:41,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2025-03-13 21:46:41,459 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2025-03-13 21:46:41,459 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 134 flow. Second operand 5 states and 104 transitions. [2025-03-13 21:46:41,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 76 transitions, 346 flow [2025-03-13 21:46:41,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 76 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-13 21:46:41,462 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 154 flow [2025-03-13 21:46:41,462 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2025-03-13 21:46:41,463 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2025-03-13 21:46:41,463 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 154 flow [2025-03-13 21:46:41,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 21:46:41,464 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:41,464 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:41,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-13 21:46:41,464 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:46:41,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:41,464 INFO L85 PathProgramCache]: Analyzing trace with hash -56169424, now seen corresponding path program 1 times [2025-03-13 21:46:41,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:41,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989968973] [2025-03-13 21:46:41,465 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:46:41,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:41,477 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-13 21:46:41,486 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-13 21:46:41,487 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:41,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:46:41,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:41,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989968973] [2025-03-13 21:46:41,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989968973] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:46:41,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:46:41,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:46:41,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789843504] [2025-03-13 21:46:41,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:46:41,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:46:41,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:41,618 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:46:41,618 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:46:41,618 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-13 21:46:41,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 21:46:41,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:41,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-13 21:46:41,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:41,907 INFO L124 PetriNetUnfolderBase]: 3336/4961 cut-off events. [2025-03-13 21:46:41,908 INFO L125 PetriNetUnfolderBase]: For 908/908 co-relation queries the response was YES. [2025-03-13 21:46:41,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11118 conditions, 4961 events. 3336/4961 cut-off events. For 908/908 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 23541 event pairs, 3018 based on Foata normal form. 14/4235 useless extension candidates. Maximal degree in co-relation 11107. Up to 3721 conditions per place. [2025-03-13 21:46:41,922 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 40 selfloop transitions, 3 changer transitions 30/77 dead transitions. [2025-03-13 21:46:41,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 77 transitions, 390 flow [2025-03-13 21:46:41,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:46:41,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:46:41,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2025-03-13 21:46:41,923 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5052083333333334 [2025-03-13 21:46:41,923 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 154 flow. Second operand 4 states and 97 transitions. [2025-03-13 21:46:41,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 77 transitions, 390 flow [2025-03-13 21:46:41,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 77 transitions, 366 flow, removed 11 selfloop flow, removed 3 redundant places. [2025-03-13 21:46:41,927 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 158 flow [2025-03-13 21:46:41,927 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2025-03-13 21:46:41,928 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2025-03-13 21:46:41,928 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 158 flow [2025-03-13 21:46:41,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 21:46:41,928 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:41,928 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:41,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-13 21:46:41,928 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:46:41,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:41,929 INFO L85 PathProgramCache]: Analyzing trace with hash 2075639658, now seen corresponding path program 1 times [2025-03-13 21:46:41,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:41,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953152824] [2025-03-13 21:46:41,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:46:41,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:41,939 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-13 21:46:41,950 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-13 21:46:41,950 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:41,950 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:42,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:46:42,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:42,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953152824] [2025-03-13 21:46:42,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953152824] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:46:42,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:46:42,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:46:42,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321633882] [2025-03-13 21:46:42,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:46:42,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:46:42,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:42,069 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:46:42,069 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:46:42,071 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-13 21:46:42,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 21:46:42,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:42,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-13 21:46:42,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:42,358 INFO L124 PetriNetUnfolderBase]: 3297/4894 cut-off events. [2025-03-13 21:46:42,358 INFO L125 PetriNetUnfolderBase]: For 809/809 co-relation queries the response was YES. [2025-03-13 21:46:42,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10865 conditions, 4894 events. 3297/4894 cut-off events. For 809/809 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 23400 event pairs, 2984 based on Foata normal form. 10/4168 useless extension candidates. Maximal degree in co-relation 10854. Up to 3719 conditions per place. [2025-03-13 21:46:42,373 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 38 selfloop transitions, 6 changer transitions 24/72 dead transitions. [2025-03-13 21:46:42,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 356 flow [2025-03-13 21:46:42,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:46:42,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:46:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2025-03-13 21:46:42,374 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2025-03-13 21:46:42,374 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 158 flow. Second operand 5 states and 100 transitions. [2025-03-13 21:46:42,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 356 flow [2025-03-13 21:46:42,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 72 transitions, 346 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-13 21:46:42,377 INFO L231 Difference]: Finished difference. Result has 58 places, 48 transitions, 174 flow [2025-03-13 21:46:42,378 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=58, PETRI_TRANSITIONS=48} [2025-03-13 21:46:42,378 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2025-03-13 21:46:42,379 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 48 transitions, 174 flow [2025-03-13 21:46:42,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 21:46:42,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:42,379 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:42,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-13 21:46:42,380 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:46:42,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:42,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1139471787, now seen corresponding path program 1 times [2025-03-13 21:46:42,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:42,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698138264] [2025-03-13 21:46:42,380 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:46:42,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:42,403 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-13 21:46:42,422 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-13 21:46:42,422 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:42,422 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:42,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:42,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698138264] [2025-03-13 21:46:42,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698138264] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:46:42,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:46:42,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-13 21:46:42,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733493442] [2025-03-13 21:46:42,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:46:42,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:46:42,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:42,497 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:46:42,498 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:46:42,498 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-13 21:46:42,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 48 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 21:46:42,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:42,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-13 21:46:42,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:42,986 INFO L124 PetriNetUnfolderBase]: 5255/7615 cut-off events. [2025-03-13 21:46:42,987 INFO L125 PetriNetUnfolderBase]: For 2329/2329 co-relation queries the response was YES. [2025-03-13 21:46:42,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17554 conditions, 7615 events. 5255/7615 cut-off events. For 2329/2329 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 35164 event pairs, 2749 based on Foata normal form. 156/6710 useless extension candidates. Maximal degree in co-relation 17542. Up to 2981 conditions per place. [2025-03-13 21:46:43,009 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 85 selfloop transitions, 9 changer transitions 0/98 dead transitions. [2025-03-13 21:46:43,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 98 transitions, 506 flow [2025-03-13 21:46:43,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:46:43,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:46:43,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2025-03-13 21:46:43,011 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5989583333333334 [2025-03-13 21:46:43,011 INFO L175 Difference]: Start difference. First operand has 58 places, 48 transitions, 174 flow. Second operand 4 states and 115 transitions. [2025-03-13 21:46:43,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 98 transitions, 506 flow [2025-03-13 21:46:43,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 98 transitions, 492 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-13 21:46:43,014 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 223 flow [2025-03-13 21:46:43,014 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=223, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2025-03-13 21:46:43,014 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 15 predicate places. [2025-03-13 21:46:43,014 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 223 flow [2025-03-13 21:46:43,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 21:46:43,015 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:43,015 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:43,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-13 21:46:43,015 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:46:43,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:43,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1792165292, now seen corresponding path program 1 times [2025-03-13 21:46:43,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:43,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131577460] [2025-03-13 21:46:43,016 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:46:43,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:43,030 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-13 21:46:43,045 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-13 21:46:43,045 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:43,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:46:43,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:43,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131577460] [2025-03-13 21:46:43,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131577460] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:43,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268876636] [2025-03-13 21:46:43,207 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:46:43,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:43,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:43,209 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 21:46:43,211 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 21:46:43,285 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-03-13 21:46:43,323 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-03-13 21:46:43,324 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:43,324 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:43,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-13 21:46:43,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:46:43,432 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:46:43,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268876636] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:46:43,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:46:43,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-13 21:46:43,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529885062] [2025-03-13 21:46:43,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:46:43,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-13 21:46:43,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:43,558 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-13 21:46:43,558 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2025-03-13 21:46:43,558 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-13 21:46:43,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 223 flow. Second operand has 12 states, 12 states have (on average 11.666666666666666) internal successors, (140), 12 states have internal predecessors, (140), 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 21:46:43,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:43,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-13 21:46:43,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:44,209 INFO L124 PetriNetUnfolderBase]: 6007/8805 cut-off events. [2025-03-13 21:46:44,209 INFO L125 PetriNetUnfolderBase]: For 4180/4180 co-relation queries the response was YES. [2025-03-13 21:46:44,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21970 conditions, 8805 events. 6007/8805 cut-off events. For 4180/4180 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 42807 event pairs, 5125 based on Foata normal form. 2/7537 useless extension candidates. Maximal degree in co-relation 21957. Up to 7601 conditions per place. [2025-03-13 21:46:44,235 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 48 selfloop transitions, 3 changer transitions 43/98 dead transitions. [2025-03-13 21:46:44,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 98 transitions, 546 flow [2025-03-13 21:46:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-13 21:46:44,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-13 21:46:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2025-03-13 21:46:44,236 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2025-03-13 21:46:44,236 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 223 flow. Second operand 7 states and 130 transitions. [2025-03-13 21:46:44,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 98 transitions, 546 flow [2025-03-13 21:46:44,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 98 transitions, 538 flow, removed 4 selfloop flow, removed 0 redundant places. [2025-03-13 21:46:44,242 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 239 flow [2025-03-13 21:46:44,242 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=239, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2025-03-13 21:46:44,242 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 25 predicate places. [2025-03-13 21:46:44,242 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 239 flow [2025-03-13 21:46:44,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.666666666666666) internal successors, (140), 12 states have internal predecessors, (140), 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 21:46:44,243 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:44,243 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:44,252 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 21:46:44,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-13 21:46:44,444 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:46:44,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:44,444 INFO L85 PathProgramCache]: Analyzing trace with hash 95118911, now seen corresponding path program 2 times [2025-03-13 21:46:44,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:44,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226332117] [2025-03-13 21:46:44,444 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:46:44,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:44,456 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 45 statements into 2 equivalence classes. [2025-03-13 21:46:44,566 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 41 of 45 statements. [2025-03-13 21:46:44,567 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-13 21:46:44,567 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-13 21:46:45,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:45,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226332117] [2025-03-13 21:46:45,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226332117] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:46:45,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:46:45,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2025-03-13 21:46:45,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033530944] [2025-03-13 21:46:45,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:46:45,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-13 21:46:45,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:45,730 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-13 21:46:45,731 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2025-03-13 21:46:45,731 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-13 21:46:45,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 239 flow. Second operand has 13 states, 13 states have (on average 10.076923076923077) internal successors, (131), 13 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 21:46:45,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:45,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-13 21:46:45,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:46,532 INFO L124 PetriNetUnfolderBase]: 6147/8901 cut-off events. [2025-03-13 21:46:46,533 INFO L125 PetriNetUnfolderBase]: For 4584/4584 co-relation queries the response was YES. [2025-03-13 21:46:46,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22448 conditions, 8901 events. 6147/8901 cut-off events. For 4584/4584 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 41489 event pairs, 2206 based on Foata normal form. 1/7639 useless extension candidates. Maximal degree in co-relation 22430. Up to 6518 conditions per place. [2025-03-13 21:46:46,566 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 100 selfloop transitions, 15 changer transitions 18/137 dead transitions. [2025-03-13 21:46:46,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 137 transitions, 731 flow [2025-03-13 21:46:46,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-13 21:46:46,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-13 21:46:46,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2025-03-13 21:46:46,568 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40208333333333335 [2025-03-13 21:46:46,568 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 239 flow. Second operand 10 states and 193 transitions. [2025-03-13 21:46:46,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 137 transitions, 731 flow [2025-03-13 21:46:46,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 137 transitions, 715 flow, removed 6 selfloop flow, removed 5 redundant places. [2025-03-13 21:46:46,578 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 347 flow [2025-03-13 21:46:46,578 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=347, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2025-03-13 21:46:46,579 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 30 predicate places. [2025-03-13 21:46:46,579 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 347 flow [2025-03-13 21:46:46,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.076923076923077) internal successors, (131), 13 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 21:46:46,580 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:46,580 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:46,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-13 21:46:46,580 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:46:46,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:46,581 INFO L85 PathProgramCache]: Analyzing trace with hash 526799844, now seen corresponding path program 3 times [2025-03-13 21:46:46,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:46,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122846646] [2025-03-13 21:46:46,581 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:46:46,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:46,598 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 2 equivalence classes. [2025-03-13 21:46:46,635 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-03-13 21:46:46,635 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:46:46,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-13 21:46:46,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:46,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122846646] [2025-03-13 21:46:46,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122846646] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:46,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958028718] [2025-03-13 21:46:46,808 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:46:46,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:46,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:46,811 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 21:46:46,812 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 21:46:46,888 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 49 statements into 2 equivalence classes. [2025-03-13 21:46:46,927 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-03-13 21:46:46,927 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-13 21:46:46,927 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:46,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-13 21:46:46,931 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:47,153 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-13 21:46:47,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958028718] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:46:47,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:46:47,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 20 [2025-03-13 21:46:47,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239980730] [2025-03-13 21:46:47,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:46:47,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-13 21:46:47,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:47,579 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-13 21:46:47,579 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2025-03-13 21:46:47,579 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-13 21:46:47,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 347 flow. Second operand has 20 states, 20 states have (on average 13.0) internal successors, (260), 20 states have internal predecessors, (260), 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 21:46:47,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:47,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-13 21:46:47,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:49,190 INFO L124 PetriNetUnfolderBase]: 11303/17026 cut-off events. [2025-03-13 21:46:49,190 INFO L125 PetriNetUnfolderBase]: For 15669/15669 co-relation queries the response was YES. [2025-03-13 21:46:49,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43556 conditions, 17026 events. 11303/17026 cut-off events. For 15669/15669 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 96009 event pairs, 7950 based on Foata normal form. 901/15389 useless extension candidates. Maximal degree in co-relation 43537. Up to 8883 conditions per place. [2025-03-13 21:46:49,242 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 112 selfloop transitions, 13 changer transitions 165/294 dead transitions. [2025-03-13 21:46:49,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 294 transitions, 1853 flow [2025-03-13 21:46:49,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-13 21:46:49,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-13 21:46:49,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 378 transitions. [2025-03-13 21:46:49,245 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39375 [2025-03-13 21:46:49,245 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 347 flow. Second operand 20 states and 378 transitions. [2025-03-13 21:46:49,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 294 transitions, 1853 flow [2025-03-13 21:46:49,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 294 transitions, 1757 flow, removed 43 selfloop flow, removed 2 redundant places. [2025-03-13 21:46:49,259 INFO L231 Difference]: Finished difference. Result has 106 places, 74 transitions, 472 flow [2025-03-13 21:46:49,259 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=472, PETRI_PLACES=106, PETRI_TRANSITIONS=74} [2025-03-13 21:46:49,261 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 61 predicate places. [2025-03-13 21:46:49,261 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 74 transitions, 472 flow [2025-03-13 21:46:49,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 13.0) internal successors, (260), 20 states have internal predecessors, (260), 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 21:46:49,262 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:49,262 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:49,268 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 21:46:49,462 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,SelfDestructingSolverStorable11 [2025-03-13 21:46:49,463 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:46:49,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:49,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1368710796, now seen corresponding path program 4 times [2025-03-13 21:46:49,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:49,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769638686] [2025-03-13 21:46:49,463 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:46:49,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:49,474 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 50 statements into 2 equivalence classes. [2025-03-13 21:46:49,490 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-03-13 21:46:49,490 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:46:49,490 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-13 21:46:49,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:49,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769638686] [2025-03-13 21:46:49,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769638686] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:49,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255445504] [2025-03-13 21:46:49,643 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:46:49,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:49,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:49,645 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 21:46:49,648 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 21:46:49,711 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 50 statements into 2 equivalence classes. [2025-03-13 21:46:49,742 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-03-13 21:46:49,742 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:46:49,742 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:49,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-13 21:46:49,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-13 21:46:49,834 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-13 21:46:49,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255445504] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:46:49,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:46:49,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-03-13 21:46:49,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438220917] [2025-03-13 21:46:49,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:46:49,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-13 21:46:49,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:49,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-13 21:46:49,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2025-03-13 21:46:49,926 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-13 21:46:49,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 74 transitions, 472 flow. Second operand has 18 states, 18 states have (on average 10.944444444444445) internal successors, (197), 18 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 21:46:49,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:49,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-13 21:46:49,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:50,768 INFO L124 PetriNetUnfolderBase]: 6905/10111 cut-off events. [2025-03-13 21:46:50,768 INFO L125 PetriNetUnfolderBase]: For 15214/15214 co-relation queries the response was YES. [2025-03-13 21:46:50,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28756 conditions, 10111 events. 6905/10111 cut-off events. For 15214/15214 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 50003 event pairs, 5712 based on Foata normal form. 2/8638 useless extension candidates. Maximal degree in co-relation 28722. Up to 8887 conditions per place. [2025-03-13 21:46:50,813 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 60 selfloop transitions, 4 changer transitions 51/119 dead transitions. [2025-03-13 21:46:50,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 119 transitions, 828 flow [2025-03-13 21:46:50,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-13 21:46:50,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-13 21:46:50,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2025-03-13 21:46:50,814 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2025-03-13 21:46:50,815 INFO L175 Difference]: Start difference. First operand has 106 places, 74 transitions, 472 flow. Second operand 9 states and 152 transitions. [2025-03-13 21:46:50,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 119 transitions, 828 flow [2025-03-13 21:46:50,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 119 transitions, 772 flow, removed 23 selfloop flow, removed 9 redundant places. [2025-03-13 21:46:50,837 INFO L231 Difference]: Finished difference. Result has 101 places, 68 transitions, 377 flow [2025-03-13 21:46:50,837 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=377, PETRI_PLACES=101, PETRI_TRANSITIONS=68} [2025-03-13 21:46:50,838 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2025-03-13 21:46:50,838 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 68 transitions, 377 flow [2025-03-13 21:46:50,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.944444444444445) internal successors, (197), 18 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 21:46:50,838 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:50,838 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:50,845 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 21:46:51,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:51,043 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:46:51,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:51,044 INFO L85 PathProgramCache]: Analyzing trace with hash 536495547, now seen corresponding path program 5 times [2025-03-13 21:46:51,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:51,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649975224] [2025-03-13 21:46:51,044 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:46:51,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:51,057 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 3 equivalence classes. [2025-03-13 21:46:51,070 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 51 of 51 statements. [2025-03-13 21:46:51,070 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-13 21:46:51,070 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-03-13 21:46:51,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:51,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649975224] [2025-03-13 21:46:51,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649975224] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:51,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177119834] [2025-03-13 21:46:51,228 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:46:51,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:51,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:51,230 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 21:46:51,231 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 21:46:51,302 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 3 equivalence classes. [2025-03-13 21:46:51,342 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 51 of 51 statements. [2025-03-13 21:46:51,342 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-13 21:46:51,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:51,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-13 21:46:51,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-13 21:46:51,396 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-13 21:46:51,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177119834] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:46:51,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-13 21:46:51,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2025-03-13 21:46:51,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607001566] [2025-03-13 21:46:51,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:46:51,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:46:51,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:51,397 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:46:51,397 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-13 21:46:51,397 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-13 21:46:51,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 68 transitions, 377 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 21:46:51,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:51,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-13 21:46:51,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:53,286 INFO L124 PetriNetUnfolderBase]: 14442/20824 cut-off events. [2025-03-13 21:46:53,287 INFO L125 PetriNetUnfolderBase]: For 32795/32795 co-relation queries the response was YES. [2025-03-13 21:46:53,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59786 conditions, 20824 events. 14442/20824 cut-off events. For 32795/32795 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 103465 event pairs, 6150 based on Foata normal form. 375/18302 useless extension candidates. Maximal degree in co-relation 59754. Up to 8331 conditions per place. [2025-03-13 21:46:53,372 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 114 selfloop transitions, 6 changer transitions 0/124 dead transitions. [2025-03-13 21:46:53,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 124 transitions, 888 flow [2025-03-13 21:46:53,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:46:53,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:46:53,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2025-03-13 21:46:53,373 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5989583333333334 [2025-03-13 21:46:53,373 INFO L175 Difference]: Start difference. First operand has 101 places, 68 transitions, 377 flow. Second operand 4 states and 115 transitions. [2025-03-13 21:46:53,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 124 transitions, 888 flow [2025-03-13 21:46:53,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 124 transitions, 818 flow, removed 28 selfloop flow, removed 15 redundant places. [2025-03-13 21:46:53,411 INFO L231 Difference]: Finished difference. Result has 82 places, 66 transitions, 352 flow [2025-03-13 21:46:53,411 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=352, PETRI_PLACES=82, PETRI_TRANSITIONS=66} [2025-03-13 21:46:53,411 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 37 predicate places. [2025-03-13 21:46:53,412 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 66 transitions, 352 flow [2025-03-13 21:46:53,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 21:46:53,412 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:53,412 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:53,419 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 21:46:53,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:53,613 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:46:53,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:53,614 INFO L85 PathProgramCache]: Analyzing trace with hash 315876789, now seen corresponding path program 6 times [2025-03-13 21:46:53,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:53,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519516566] [2025-03-13 21:46:53,614 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-13 21:46:53,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:53,627 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 51 statements into 3 equivalence classes. [2025-03-13 21:46:53,672 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 51 of 51 statements. [2025-03-13 21:46:53,672 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-13 21:46:53,672 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-13 21:46:53,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:53,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519516566] [2025-03-13 21:46:53,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519516566] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:46:53,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:46:53,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:46:53,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856193691] [2025-03-13 21:46:53,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:46:53,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:46:53,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:53,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:46:53,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:46:53,742 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-13 21:46:53,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 66 transitions, 352 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 21:46:53,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:53,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-13 21:46:53,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:53,934 INFO L124 PetriNetUnfolderBase]: 2344/3634 cut-off events. [2025-03-13 21:46:53,934 INFO L125 PetriNetUnfolderBase]: For 2373/2373 co-relation queries the response was YES. [2025-03-13 21:46:53,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8509 conditions, 3634 events. 2344/3634 cut-off events. For 2373/2373 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 15635 event pairs, 2101 based on Foata normal form. 154/3150 useless extension candidates. Maximal degree in co-relation 8485. Up to 3372 conditions per place. [2025-03-13 21:46:53,945 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 58 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2025-03-13 21:46:53,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 67 transitions, 438 flow [2025-03-13 21:46:53,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:46:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:46:53,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2025-03-13 21:46:53,946 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4010416666666667 [2025-03-13 21:46:53,946 INFO L175 Difference]: Start difference. First operand has 82 places, 66 transitions, 352 flow. Second operand 4 states and 77 transitions. [2025-03-13 21:46:53,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 67 transitions, 438 flow [2025-03-13 21:46:53,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 67 transitions, 385 flow, removed 4 selfloop flow, removed 8 redundant places. [2025-03-13 21:46:53,951 INFO L231 Difference]: Finished difference. Result has 77 places, 56 transitions, 245 flow [2025-03-13 21:46:53,951 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=77, PETRI_TRANSITIONS=56} [2025-03-13 21:46:53,952 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 32 predicate places. [2025-03-13 21:46:53,952 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 56 transitions, 245 flow [2025-03-13 21:46:53,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 21:46:53,952 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:53,952 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:53,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-13 21:46:53,953 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:46:53,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:53,953 INFO L85 PathProgramCache]: Analyzing trace with hash 2010141952, now seen corresponding path program 7 times [2025-03-13 21:46:53,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:53,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884869165] [2025-03-13 21:46:53,953 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:46:53,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:53,964 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-03-13 21:46:53,977 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-03-13 21:46:53,978 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:53,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:54,171 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-13 21:46:54,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:54,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884869165] [2025-03-13 21:46:54,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884869165] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:54,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236632937] [2025-03-13 21:46:54,172 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-13 21:46:54,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:54,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:54,174 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 21:46:54,175 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 21:46:54,252 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 61 statements into 1 equivalence classes. [2025-03-13 21:46:54,290 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 61 of 61 statements. [2025-03-13 21:46:54,290 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:46:54,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:54,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-13 21:46:54,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-13 21:46:54,381 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-13 21:46:54,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236632937] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:46:54,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:46:54,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 17 [2025-03-13 21:46:54,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804742764] [2025-03-13 21:46:54,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:46:54,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-13 21:46:54,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:54,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-13 21:46:54,482 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2025-03-13 21:46:54,482 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-13 21:46:54,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 56 transitions, 245 flow. Second operand has 17 states, 17 states have (on average 13.588235294117647) internal successors, (231), 17 states have internal predecessors, (231), 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 21:46:54,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:54,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-13 21:46:54,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:55,587 INFO L124 PetriNetUnfolderBase]: 6980/10858 cut-off events. [2025-03-13 21:46:55,587 INFO L125 PetriNetUnfolderBase]: For 2761/2761 co-relation queries the response was YES. [2025-03-13 21:46:55,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24422 conditions, 10858 events. 6980/10858 cut-off events. For 2761/2761 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 60259 event pairs, 5887 based on Foata normal form. 22/8986 useless extension candidates. Maximal degree in co-relation 24403. Up to 3613 conditions per place. [2025-03-13 21:46:55,609 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 46 selfloop transitions, 8 changer transitions 203/261 dead transitions. [2025-03-13 21:46:55,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 261 transitions, 1379 flow [2025-03-13 21:46:55,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-13 21:46:55,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-13 21:46:55,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 415 transitions. [2025-03-13 21:46:55,611 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3602430555555556 [2025-03-13 21:46:55,611 INFO L175 Difference]: Start difference. First operand has 77 places, 56 transitions, 245 flow. Second operand 24 states and 415 transitions. [2025-03-13 21:46:55,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 261 transitions, 1379 flow [2025-03-13 21:46:55,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 261 transitions, 1348 flow, removed 3 selfloop flow, removed 4 redundant places. [2025-03-13 21:46:55,617 INFO L231 Difference]: Finished difference. Result has 111 places, 58 transitions, 297 flow [2025-03-13 21:46:55,617 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=297, PETRI_PLACES=111, PETRI_TRANSITIONS=58} [2025-03-13 21:46:55,617 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2025-03-13 21:46:55,617 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 58 transitions, 297 flow [2025-03-13 21:46:55,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.588235294117647) internal successors, (231), 17 states have internal predecessors, (231), 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 21:46:55,618 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:55,618 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:55,624 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 21:46:55,818 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,SelfDestructingSolverStorable15 [2025-03-13 21:46:55,819 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:46:55,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:55,819 INFO L85 PathProgramCache]: Analyzing trace with hash 919387190, now seen corresponding path program 8 times [2025-03-13 21:46:55,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:55,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036468247] [2025-03-13 21:46:55,819 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:46:55,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:55,834 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 63 statements into 2 equivalence classes. [2025-03-13 21:46:55,862 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 63 of 63 statements. [2025-03-13 21:46:55,863 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:46:55,863 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-13 21:46:56,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:46:56,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036468247] [2025-03-13 21:46:56,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036468247] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:46:56,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72917848] [2025-03-13 21:46:56,035 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:46:56,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:46:56,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:46:56,037 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 21:46:56,039 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 21:46:56,117 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 63 statements into 2 equivalence classes. [2025-03-13 21:46:56,265 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 63 of 63 statements. [2025-03-13 21:46:56,265 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:46:56,265 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:46:56,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-13 21:46:56,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:46:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-13 21:46:56,479 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:46:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-13 21:46:56,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72917848] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:46:56,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:46:56,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2025-03-13 21:46:56,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138129974] [2025-03-13 21:46:56,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:46:56,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-13 21:46:56,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:46:56,779 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-13 21:46:56,780 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2025-03-13 21:46:56,780 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2025-03-13 21:46:56,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 58 transitions, 297 flow. Second operand has 22 states, 22 states have (on average 13.590909090909092) internal successors, (299), 22 states have internal predecessors, (299), 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 21:46:56,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:46:56,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2025-03-13 21:46:56,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:46:57,388 INFO L124 PetriNetUnfolderBase]: 3986/6226 cut-off events. [2025-03-13 21:46:57,388 INFO L125 PetriNetUnfolderBase]: For 2023/2023 co-relation queries the response was YES. [2025-03-13 21:46:57,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14184 conditions, 6226 events. 3986/6226 cut-off events. For 2023/2023 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 30277 event pairs, 2412 based on Foata normal form. 56/5201 useless extension candidates. Maximal degree in co-relation 14151. Up to 2403 conditions per place. [2025-03-13 21:46:57,409 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 53 selfloop transitions, 9 changer transitions 88/154 dead transitions. [2025-03-13 21:46:57,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 154 transitions, 915 flow [2025-03-13 21:46:57,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-13 21:46:57,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-13 21:46:57,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 242 transitions. [2025-03-13 21:46:57,411 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2025-03-13 21:46:57,411 INFO L175 Difference]: Start difference. First operand has 111 places, 58 transitions, 297 flow. Second operand 14 states and 242 transitions. [2025-03-13 21:46:57,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 154 transitions, 915 flow [2025-03-13 21:46:57,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 154 transitions, 827 flow, removed 36 selfloop flow, removed 19 redundant places. [2025-03-13 21:46:57,417 INFO L231 Difference]: Finished difference. Result has 94 places, 59 transitions, 281 flow [2025-03-13 21:46:57,418 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=281, PETRI_PLACES=94, PETRI_TRANSITIONS=59} [2025-03-13 21:46:57,418 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2025-03-13 21:46:57,418 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 59 transitions, 281 flow [2025-03-13 21:46:57,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 13.590909090909092) internal successors, (299), 22 states have internal predecessors, (299), 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 21:46:57,418 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:46:57,418 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:46:57,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-13 21:46:57,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-13 21:46:57,619 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-13 21:46:57,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:46:57,619 INFO L85 PathProgramCache]: Analyzing trace with hash -2029761124, now seen corresponding path program 9 times [2025-03-13 21:46:57,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:46:57,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257605747] [2025-03-13 21:46:57,620 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:46:57,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:46:57,631 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 64 statements into 3 equivalence classes. [2025-03-13 21:46:57,794 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 64 of 64 statements. [2025-03-13 21:46:57,795 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-13 21:46:57,795 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:47:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:47:03,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:47:03,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257605747] [2025-03-13 21:47:03,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257605747] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:47:03,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163441876] [2025-03-13 21:47:03,236 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:47:03,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:47:03,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:47:03,238 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 21:47:03,239 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 21:47:03,322 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 64 statements into 3 equivalence classes. [2025-03-13 21:47:03,552 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 64 of 64 statements. [2025-03-13 21:47:03,552 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-13 21:47:03,552 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:47:03,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 126 conjuncts are in the unsatisfiable core [2025-03-13 21:47:03,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:47:04,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-13 21:47:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:47:06,892 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:47:32,096 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:47:32,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1305 treesize of output 1255 [2025-03-13 21:47:32,319 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-13 21:47:32,326 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:47:32,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 103 [2025-03-13 21:47:32,462 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-13 21:47:32,555 INFO L349 Elim1Store]: treesize reduction 10, result has 94.3 percent of original size [2025-03-13 21:47:32,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 325 treesize of output 451 [2025-03-13 21:47:43,948 INFO L349 Elim1Store]: treesize reduction 10, result has 47.4 percent of original size [2025-03-13 21:47:43,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 189 treesize of output 159 [2025-03-13 21:47:48,564 INFO L349 Elim1Store]: treesize reduction 70, result has 91.9 percent of original size [2025-03-13 21:47:48,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 3680 treesize of output 3475