./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 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-more-queue-add-2-nl.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 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 06:43:40,885 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:43:40,930 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:43:40,938 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:43:40,938 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:43:40,952 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:43:40,952 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:43:40,952 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:43:40,953 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:43:40,953 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:43:40,953 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:43:40,953 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:43:40,953 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:43:40,953 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:43:40,953 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:43:40,953 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:43:40,953 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:43:40,953 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:43:40,953 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:43:40,953 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:43:40,953 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:43:40,953 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:43:40,953 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:43:40,954 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:43:40,954 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:43:40,955 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:43:40,955 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:43:40,955 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:43:40,955 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:43:40,955 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:43:40,955 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:43:40,955 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:43:40,955 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:43:40,955 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:43:40,955 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:43:40,955 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:43:40,955 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:43:40,955 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:43:40,955 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:43:40,955 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:43:40,955 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:43:40,955 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:43:40,955 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:43:40,955 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 -> 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d [2025-03-17 06:43:41,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:43:41,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:43:41,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:43:41,193 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:43:41,193 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:43:41,195 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2025-03-17 06:43:42,360 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/393d24582/8ecfbd1429284e5184f3278a373ce6dd/FLAG7d0fa2529 [2025-03-17 06:43:42,542 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:43:42,543 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2025-03-17 06:43:42,551 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/393d24582/8ecfbd1429284e5184f3278a373ce6dd/FLAG7d0fa2529 [2025-03-17 06:43:42,914 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/393d24582/8ecfbd1429284e5184f3278a373ce6dd [2025-03-17 06:43:42,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:43:42,917 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:43:42,918 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:43:42,918 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:43:42,921 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:43:42,922 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:43:42" (1/1) ... [2025-03-17 06:43:42,922 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64ae290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:43:42, skipping insertion in model container [2025-03-17 06:43:42,923 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:43:42" (1/1) ... [2025-03-17 06:43:42,933 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:43:43,063 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2896,2909] [2025-03-17 06:43:43,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:43:43,080 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:43:43,099 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2896,2909] [2025-03-17 06:43:43,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:43:43,118 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:43:43,119 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:43:43 WrapperNode [2025-03-17 06:43:43,119 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:43:43,119 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:43:43,120 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:43:43,120 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:43:43,124 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:43:43" (1/1) ... [2025-03-17 06:43:43,130 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:43:43" (1/1) ... [2025-03-17 06:43:43,148 INFO L138 Inliner]: procedures = 24, calls = 29, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 150 [2025-03-17 06:43:43,151 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:43:43,152 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:43:43,152 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:43:43,152 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:43:43,159 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:43:43" (1/1) ... [2025-03-17 06:43:43,160 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:43:43" (1/1) ... [2025-03-17 06:43:43,165 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:43:43" (1/1) ... [2025-03-17 06:43:43,181 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-17 06:43:43,184 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:43:43" (1/1) ... [2025-03-17 06:43:43,184 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:43:43" (1/1) ... [2025-03-17 06:43:43,189 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:43:43" (1/1) ... [2025-03-17 06:43:43,190 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:43:43" (1/1) ... [2025-03-17 06:43:43,190 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:43:43" (1/1) ... [2025-03-17 06:43:43,195 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:43:43" (1/1) ... [2025-03-17 06:43:43,199 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:43:43,200 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:43:43,201 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:43:43,201 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:43:43,202 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:43:43" (1/1) ... [2025-03-17 06:43:43,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:43:43,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:43:43,226 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) [2025-03-17 06:43:43,231 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 [2025-03-17 06:43:43,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:43:43,244 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 06:43:43,245 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 06:43:43,245 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 06:43:43,245 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 06:43:43,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:43:43,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 06:43:43,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 06:43:43,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 06:43:43,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 06:43:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 06:43:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 06:43:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:43:43,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:43:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 06:43:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 06:43:43,247 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 06:43:43,325 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:43:43,327 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:43:43,527 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:43:43,527 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:43:43,689 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:43:43,689 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:43:43,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:43:43 BoogieIcfgContainer [2025-03-17 06:43:43,689 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:43:43,691 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:43:43,691 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:43:43,696 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:43:43,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:43:42" (1/3) ... [2025-03-17 06:43:43,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53effd78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:43:43, skipping insertion in model container [2025-03-17 06:43:43,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:43:43" (2/3) ... [2025-03-17 06:43:43,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53effd78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:43:43, skipping insertion in model container [2025-03-17 06:43:43,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:43:43" (3/3) ... [2025-03-17 06:43:43,698 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2025-03-17 06:43:43,708 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:43:43,709 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-queue-add-2-nl.wvr.c that has 3 procedures, 25 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-17 06:43:43,709 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:43:43,749 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-17 06:43:43,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 28 transitions, 70 flow [2025-03-17 06:43:43,794 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2025-03-17 06:43:43,795 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 06:43:43,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 4/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2025-03-17 06:43:43,799 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 28 transitions, 70 flow [2025-03-17 06:43:43,801 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 25 transitions, 62 flow [2025-03-17 06:43:43,808 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:43:43,815 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;@3956870d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:43:43,816 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-17 06:43:43,824 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:43:43,824 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2025-03-17 06:43:43,825 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 06:43:43,825 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:43,825 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:43:43,826 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:43:43,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:43,833 INFO L85 PathProgramCache]: Analyzing trace with hash -328029012, now seen corresponding path program 1 times [2025-03-17 06:43:43,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:43,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799080241] [2025-03-17 06:43:43,838 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:43:43,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:43,896 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-17 06:43:43,924 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 06:43:43,927 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:43:43,927 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:43:44,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:44,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799080241] [2025-03-17 06:43:44,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799080241] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:44,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:44,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:43:44,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939098838] [2025-03-17 06:43:44,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:44,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-17 06:43:44,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:44,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-17 06:43:44,032 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 06:43:44,033 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 28 [2025-03-17 06:43:44,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 62 flow. Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 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) [2025-03-17 06:43:44,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:44,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 28 [2025-03-17 06:43:44,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:44,122 INFO L124 PetriNetUnfolderBase]: 108/203 cut-off events. [2025-03-17 06:43:44,123 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-03-17 06:43:44,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 203 events. 108/203 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 620 event pairs, 83 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 361. Up to 178 conditions per place. [2025-03-17 06:43:44,125 INFO L140 encePairwiseOnDemand]: 27/28 looper letters, 20 selfloop transitions, 0 changer transitions 0/24 dead transitions. [2025-03-17 06:43:44,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 100 flow [2025-03-17 06:43:44,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-17 06:43:44,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-03-17 06:43:44,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 33 transitions. [2025-03-17 06:43:44,133 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2025-03-17 06:43:44,134 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 62 flow. Second operand 2 states and 33 transitions. [2025-03-17 06:43:44,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 100 flow [2025-03-17 06:43:44,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 92 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 06:43:44,138 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 52 flow [2025-03-17 06:43:44,139 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2025-03-17 06:43:44,141 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2025-03-17 06:43:44,141 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 52 flow [2025-03-17 06:43:44,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 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) [2025-03-17 06:43:44,142 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:44,142 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:43:44,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:43:44,142 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:43:44,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:44,142 INFO L85 PathProgramCache]: Analyzing trace with hash -957375488, now seen corresponding path program 1 times [2025-03-17 06:43:44,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:44,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833355244] [2025-03-17 06:43:44,143 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:43:44,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:44,149 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 06:43:44,176 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 06:43:44,177 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:43:44,177 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:43:44,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:44,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833355244] [2025-03-17 06:43:44,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833355244] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:44,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:44,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:43:44,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706408436] [2025-03-17 06:43:44,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:44,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:43:44,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:44,341 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:43:44,341 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 06:43:44,342 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 28 [2025-03-17 06:43:44,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:44,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:44,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 28 [2025-03-17 06:43:44,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:44,414 INFO L124 PetriNetUnfolderBase]: 121/237 cut-off events. [2025-03-17 06:43:44,414 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 06:43:44,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 237 events. 121/237 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 776 event pairs, 96 based on Foata normal form. 17/239 useless extension candidates. Maximal degree in co-relation 458. Up to 178 conditions per place. [2025-03-17 06:43:44,416 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 19 selfloop transitions, 2 changer transitions 8/33 dead transitions. [2025-03-17 06:43:44,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 130 flow [2025-03-17 06:43:44,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 06:43:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 06:43:44,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 56 transitions. [2025-03-17 06:43:44,417 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-03-17 06:43:44,417 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 52 flow. Second operand 4 states and 56 transitions. [2025-03-17 06:43:44,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 130 flow [2025-03-17 06:43:44,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 130 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 06:43:44,419 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 70 flow [2025-03-17 06:43:44,419 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2025-03-17 06:43:44,419 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2025-03-17 06:43:44,419 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 70 flow [2025-03-17 06:43:44,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:44,420 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:44,420 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] [2025-03-17 06:43:44,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 06:43:44,420 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:43:44,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:44,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1862794322, now seen corresponding path program 1 times [2025-03-17 06:43:44,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:44,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765837223] [2025-03-17 06:43:44,421 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:43:44,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:44,428 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 06:43:44,454 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 06:43:44,455 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:43:44,456 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:44,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:44,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765837223] [2025-03-17 06:43:44,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765837223] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:44,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:44,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:43:44,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639347353] [2025-03-17 06:43:44,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:44,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:43:44,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:44,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:43:44,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:43:44,981 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:43:44,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 70 flow. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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) [2025-03-17 06:43:44,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:44,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:43:44,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:45,161 INFO L124 PetriNetUnfolderBase]: 205/380 cut-off events. [2025-03-17 06:43:45,161 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2025-03-17 06:43:45,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 830 conditions, 380 events. 205/380 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1485 event pairs, 5 based on Foata normal form. 1/380 useless extension candidates. Maximal degree in co-relation 824. Up to 227 conditions per place. [2025-03-17 06:43:45,163 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 44 selfloop transitions, 14 changer transitions 5/66 dead transitions. [2025-03-17 06:43:45,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 66 transitions, 303 flow [2025-03-17 06:43:45,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:43:45,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:43:45,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2025-03-17 06:43:45,164 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2025-03-17 06:43:45,165 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 70 flow. Second operand 10 states and 113 transitions. [2025-03-17 06:43:45,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 66 transitions, 303 flow [2025-03-17 06:43:45,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 66 transitions, 299 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-17 06:43:45,166 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 151 flow [2025-03-17 06:43:45,166 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=151, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2025-03-17 06:43:45,167 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 14 predicate places. [2025-03-17 06:43:45,167 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 151 flow [2025-03-17 06:43:45,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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) [2025-03-17 06:43:45,167 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:45,167 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] [2025-03-17 06:43:45,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 06:43:45,167 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:43:45,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:45,167 INFO L85 PathProgramCache]: Analyzing trace with hash 145880988, now seen corresponding path program 2 times [2025-03-17 06:43:45,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:45,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403419590] [2025-03-17 06:43:45,168 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:43:45,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:45,175 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-17 06:43:45,180 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 19 of 20 statements. [2025-03-17 06:43:45,180 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:43:45,180 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:45,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:45,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403419590] [2025-03-17 06:43:45,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403419590] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:45,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:45,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:43:45,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952529662] [2025-03-17 06:43:45,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:45,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:43:45,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:45,223 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:43:45,224 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:43:45,224 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 28 [2025-03-17 06:43:45,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:45,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:45,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 28 [2025-03-17 06:43:45,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:45,296 INFO L124 PetriNetUnfolderBase]: 148/289 cut-off events. [2025-03-17 06:43:45,296 INFO L125 PetriNetUnfolderBase]: For 165/165 co-relation queries the response was YES. [2025-03-17 06:43:45,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 814 conditions, 289 events. 148/289 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1049 event pairs, 31 based on Foata normal form. 8/296 useless extension candidates. Maximal degree in co-relation 803. Up to 221 conditions per place. [2025-03-17 06:43:45,298 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 35 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2025-03-17 06:43:45,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 242 flow [2025-03-17 06:43:45,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:43:45,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:43:45,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2025-03-17 06:43:45,302 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2025-03-17 06:43:45,302 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 151 flow. Second operand 3 states and 46 transitions. [2025-03-17 06:43:45,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 242 flow [2025-03-17 06:43:45,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 42 transitions, 232 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-03-17 06:43:45,304 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 155 flow [2025-03-17 06:43:45,304 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2025-03-17 06:43:45,305 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 12 predicate places. [2025-03-17 06:43:45,305 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 155 flow [2025-03-17 06:43:45,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:43:45,305 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:45,305 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] [2025-03-17 06:43:45,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 06:43:45,305 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:43:45,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:45,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1134149804, now seen corresponding path program 3 times [2025-03-17 06:43:45,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:45,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770253521] [2025-03-17 06:43:45,308 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:43:45,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:45,316 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-03-17 06:43:45,325 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 19 of 20 statements. [2025-03-17 06:43:45,325 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 06:43:45,325 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:45,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:45,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770253521] [2025-03-17 06:43:45,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770253521] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:45,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:45,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:43:45,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179045760] [2025-03-17 06:43:45,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:45,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:43:45,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:45,670 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:43:45,670 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:43:45,693 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:43:45,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 155 flow. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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) [2025-03-17 06:43:45,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:45,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:43:45,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:45,838 INFO L124 PetriNetUnfolderBase]: 190/369 cut-off events. [2025-03-17 06:43:45,839 INFO L125 PetriNetUnfolderBase]: For 311/311 co-relation queries the response was YES. [2025-03-17 06:43:45,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1126 conditions, 369 events. 190/369 cut-off events. For 311/311 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1452 event pairs, 25 based on Foata normal form. 1/369 useless extension candidates. Maximal degree in co-relation 1115. Up to 223 conditions per place. [2025-03-17 06:43:45,843 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 44 selfloop transitions, 18 changer transitions 5/70 dead transitions. [2025-03-17 06:43:45,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 70 transitions, 431 flow [2025-03-17 06:43:45,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:43:45,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:43:45,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2025-03-17 06:43:45,845 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2025-03-17 06:43:45,845 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 155 flow. Second operand 10 states and 112 transitions. [2025-03-17 06:43:45,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 70 transitions, 431 flow [2025-03-17 06:43:45,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 70 transitions, 400 flow, removed 13 selfloop flow, removed 2 redundant places. [2025-03-17 06:43:45,851 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 237 flow [2025-03-17 06:43:45,851 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2025-03-17 06:43:45,851 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 23 predicate places. [2025-03-17 06:43:45,851 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 237 flow [2025-03-17 06:43:45,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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) [2025-03-17 06:43:45,852 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:45,852 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] [2025-03-17 06:43:45,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 06:43:45,852 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:43:45,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:45,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1155163638, now seen corresponding path program 4 times [2025-03-17 06:43:45,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:45,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687758972] [2025-03-17 06:43:45,852 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:43:45,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:45,858 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-03-17 06:43:45,869 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 06:43:45,869 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:43:45,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:46,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:46,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687758972] [2025-03-17 06:43:46,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687758972] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:46,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:46,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:43:46,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030484167] [2025-03-17 06:43:46,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:46,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:43:46,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:46,159 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:43:46,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:43:46,184 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2025-03-17 06:43:46,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 237 flow. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 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) [2025-03-17 06:43:46,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:46,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2025-03-17 06:43:46,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:46,372 INFO L124 PetriNetUnfolderBase]: 225/427 cut-off events. [2025-03-17 06:43:46,372 INFO L125 PetriNetUnfolderBase]: For 460/460 co-relation queries the response was YES. [2025-03-17 06:43:46,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1372 conditions, 427 events. 225/427 cut-off events. For 460/460 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1698 event pairs, 34 based on Foata normal form. 1/428 useless extension candidates. Maximal degree in co-relation 1358. Up to 270 conditions per place. [2025-03-17 06:43:46,374 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 52 selfloop transitions, 22 changer transitions 5/81 dead transitions. [2025-03-17 06:43:46,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 81 transitions, 550 flow [2025-03-17 06:43:46,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:43:46,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:43:46,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2025-03-17 06:43:46,375 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2025-03-17 06:43:46,375 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 237 flow. Second operand 10 states and 110 transitions. [2025-03-17 06:43:46,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 81 transitions, 550 flow [2025-03-17 06:43:46,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 515 flow, removed 5 selfloop flow, removed 4 redundant places. [2025-03-17 06:43:46,379 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 339 flow [2025-03-17 06:43:46,380 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=339, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2025-03-17 06:43:46,380 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 32 predicate places. [2025-03-17 06:43:46,380 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 339 flow [2025-03-17 06:43:46,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 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) [2025-03-17 06:43:46,380 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:46,380 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] [2025-03-17 06:43:46,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 06:43:46,380 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:43:46,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:46,381 INFO L85 PathProgramCache]: Analyzing trace with hash -372666866, now seen corresponding path program 5 times [2025-03-17 06:43:46,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:46,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414965946] [2025-03-17 06:43:46,381 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:43:46,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:46,390 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-17 06:43:46,401 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 06:43:46,401 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:43:46,401 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:46,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:46,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414965946] [2025-03-17 06:43:46,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414965946] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:46,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:46,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:43:46,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590637582] [2025-03-17 06:43:46,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:46,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:43:46,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:46,724 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:43:46,724 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:43:46,751 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:43:46,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 339 flow. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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) [2025-03-17 06:43:46,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:46,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:43:46,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:46,950 INFO L124 PetriNetUnfolderBase]: 206/417 cut-off events. [2025-03-17 06:43:46,950 INFO L125 PetriNetUnfolderBase]: For 807/807 co-relation queries the response was YES. [2025-03-17 06:43:46,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1492 conditions, 417 events. 206/417 cut-off events. For 807/807 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1784 event pairs, 15 based on Foata normal form. 1/418 useless extension candidates. Maximal degree in co-relation 1474. Up to 223 conditions per place. [2025-03-17 06:43:46,955 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 50 selfloop transitions, 27 changer transitions 5/85 dead transitions. [2025-03-17 06:43:46,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 85 transitions, 644 flow [2025-03-17 06:43:46,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 06:43:46,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 06:43:46,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2025-03-17 06:43:46,957 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2025-03-17 06:43:46,957 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 339 flow. Second operand 11 states and 122 transitions. [2025-03-17 06:43:46,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 85 transitions, 644 flow [2025-03-17 06:43:46,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 85 transitions, 630 flow, removed 7 selfloop flow, removed 1 redundant places. [2025-03-17 06:43:46,962 INFO L231 Difference]: Finished difference. Result has 72 places, 56 transitions, 429 flow [2025-03-17 06:43:46,962 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=429, PETRI_PLACES=72, PETRI_TRANSITIONS=56} [2025-03-17 06:43:46,963 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 44 predicate places. [2025-03-17 06:43:46,964 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 56 transitions, 429 flow [2025-03-17 06:43:46,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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) [2025-03-17 06:43:46,964 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:46,964 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] [2025-03-17 06:43:46,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 06:43:46,964 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:43:46,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:46,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1528099038, now seen corresponding path program 6 times [2025-03-17 06:43:46,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:46,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360184336] [2025-03-17 06:43:46,965 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:43:46,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:46,972 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-03-17 06:43:46,988 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 19 of 20 statements. [2025-03-17 06:43:46,988 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-17 06:43:46,988 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:47,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:47,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360184336] [2025-03-17 06:43:47,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360184336] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:47,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:47,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:43:47,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786099360] [2025-03-17 06:43:47,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:47,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:43:47,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:47,251 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:43:47,251 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:43:47,275 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:43:47,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 56 transitions, 429 flow. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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) [2025-03-17 06:43:47,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:47,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:43:47,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:47,441 INFO L124 PetriNetUnfolderBase]: 218/449 cut-off events. [2025-03-17 06:43:47,441 INFO L125 PetriNetUnfolderBase]: For 1430/1430 co-relation queries the response was YES. [2025-03-17 06:43:47,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1748 conditions, 449 events. 218/449 cut-off events. For 1430/1430 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2004 event pairs, 22 based on Foata normal form. 1/450 useless extension candidates. Maximal degree in co-relation 1726. Up to 287 conditions per place. [2025-03-17 06:43:47,444 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 55 selfloop transitions, 23 changer transitions 5/86 dead transitions. [2025-03-17 06:43:47,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 86 transitions, 734 flow [2025-03-17 06:43:47,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:43:47,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:43:47,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2025-03-17 06:43:47,447 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2025-03-17 06:43:47,447 INFO L175 Difference]: Start difference. First operand has 72 places, 56 transitions, 429 flow. Second operand 10 states and 114 transitions. [2025-03-17 06:43:47,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 86 transitions, 734 flow [2025-03-17 06:43:47,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 86 transitions, 656 flow, removed 19 selfloop flow, removed 7 redundant places. [2025-03-17 06:43:47,452 INFO L231 Difference]: Finished difference. Result has 76 places, 59 transitions, 452 flow [2025-03-17 06:43:47,452 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=452, PETRI_PLACES=76, PETRI_TRANSITIONS=59} [2025-03-17 06:43:47,453 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 48 predicate places. [2025-03-17 06:43:47,454 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 59 transitions, 452 flow [2025-03-17 06:43:47,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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) [2025-03-17 06:43:47,454 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:47,454 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] [2025-03-17 06:43:47,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 06:43:47,454 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:43:47,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:47,455 INFO L85 PathProgramCache]: Analyzing trace with hash -558996634, now seen corresponding path program 7 times [2025-03-17 06:43:47,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:47,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61372510] [2025-03-17 06:43:47,455 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 06:43:47,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:47,459 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 06:43:47,466 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 06:43:47,466 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:43:47,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:47,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:47,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61372510] [2025-03-17 06:43:47,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61372510] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:47,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:47,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:43:47,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328023932] [2025-03-17 06:43:47,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:47,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:43:47,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:47,679 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:43:47,679 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:43:47,698 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:43:47,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 59 transitions, 452 flow. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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) [2025-03-17 06:43:47,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:47,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:43:47,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:47,846 INFO L124 PetriNetUnfolderBase]: 214/436 cut-off events. [2025-03-17 06:43:47,847 INFO L125 PetriNetUnfolderBase]: For 1521/1521 co-relation queries the response was YES. [2025-03-17 06:43:47,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1756 conditions, 436 events. 214/436 cut-off events. For 1521/1521 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1920 event pairs, 22 based on Foata normal form. 1/437 useless extension candidates. Maximal degree in co-relation 1732. Up to 291 conditions per place. [2025-03-17 06:43:47,849 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 49 selfloop transitions, 22 changer transitions 8/82 dead transitions. [2025-03-17 06:43:47,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 82 transitions, 713 flow [2025-03-17 06:43:47,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:43:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:43:47,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2025-03-17 06:43:47,850 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2025-03-17 06:43:47,850 INFO L175 Difference]: Start difference. First operand has 76 places, 59 transitions, 452 flow. Second operand 10 states and 109 transitions. [2025-03-17 06:43:47,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 82 transitions, 713 flow [2025-03-17 06:43:47,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 82 transitions, 656 flow, removed 8 selfloop flow, removed 7 redundant places. [2025-03-17 06:43:47,855 INFO L231 Difference]: Finished difference. Result has 79 places, 59 transitions, 448 flow [2025-03-17 06:43:47,855 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=448, PETRI_PLACES=79, PETRI_TRANSITIONS=59} [2025-03-17 06:43:47,856 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 51 predicate places. [2025-03-17 06:43:47,856 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 59 transitions, 448 flow [2025-03-17 06:43:47,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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) [2025-03-17 06:43:47,856 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:47,856 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] [2025-03-17 06:43:47,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 06:43:47,856 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:43:47,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:47,857 INFO L85 PathProgramCache]: Analyzing trace with hash -792226526, now seen corresponding path program 8 times [2025-03-17 06:43:47,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:47,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232676312] [2025-03-17 06:43:47,857 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:43:47,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:47,862 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-17 06:43:47,872 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 19 of 20 statements. [2025-03-17 06:43:47,873 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:43:47,873 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:48,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:48,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232676312] [2025-03-17 06:43:48,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232676312] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:48,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:48,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:43:48,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17697542] [2025-03-17 06:43:48,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:48,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:43:48,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:48,124 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:43:48,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:43:48,150 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:43:48,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 59 transitions, 448 flow. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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) [2025-03-17 06:43:48,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:48,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:43:48,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:48,302 INFO L124 PetriNetUnfolderBase]: 223/461 cut-off events. [2025-03-17 06:43:48,303 INFO L125 PetriNetUnfolderBase]: For 1710/1718 co-relation queries the response was YES. [2025-03-17 06:43:48,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1852 conditions, 461 events. 223/461 cut-off events. For 1710/1718 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2083 event pairs, 35 based on Foata normal form. 3/464 useless extension candidates. Maximal degree in co-relation 1827. Up to 297 conditions per place. [2025-03-17 06:43:48,306 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 58 selfloop transitions, 23 changer transitions 5/89 dead transitions. [2025-03-17 06:43:48,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 89 transitions, 788 flow [2025-03-17 06:43:48,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:43:48,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:43:48,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2025-03-17 06:43:48,307 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2025-03-17 06:43:48,307 INFO L175 Difference]: Start difference. First operand has 79 places, 59 transitions, 448 flow. Second operand 10 states and 116 transitions. [2025-03-17 06:43:48,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 89 transitions, 788 flow [2025-03-17 06:43:48,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 89 transitions, 734 flow, removed 5 selfloop flow, removed 8 redundant places. [2025-03-17 06:43:48,311 INFO L231 Difference]: Finished difference. Result has 81 places, 62 transitions, 491 flow [2025-03-17 06:43:48,312 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=491, PETRI_PLACES=81, PETRI_TRANSITIONS=62} [2025-03-17 06:43:48,312 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 53 predicate places. [2025-03-17 06:43:48,312 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 62 transitions, 491 flow [2025-03-17 06:43:48,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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) [2025-03-17 06:43:48,312 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:48,312 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] [2025-03-17 06:43:48,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-17 06:43:48,313 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:43:48,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:48,313 INFO L85 PathProgramCache]: Analyzing trace with hash -25107102, now seen corresponding path program 9 times [2025-03-17 06:43:48,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:48,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632950928] [2025-03-17 06:43:48,313 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:43:48,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:48,318 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-03-17 06:43:48,324 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 19 of 20 statements. [2025-03-17 06:43:48,324 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 06:43:48,324 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:48,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:48,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632950928] [2025-03-17 06:43:48,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632950928] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:48,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:48,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:43:48,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222026917] [2025-03-17 06:43:48,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:48,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:43:48,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:48,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:43:48,547 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:43:48,565 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:43:48,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 62 transitions, 491 flow. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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) [2025-03-17 06:43:48,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:48,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:43:48,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:48,723 INFO L124 PetriNetUnfolderBase]: 219/448 cut-off events. [2025-03-17 06:43:48,723 INFO L125 PetriNetUnfolderBase]: For 2218/2226 co-relation queries the response was YES. [2025-03-17 06:43:48,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1918 conditions, 448 events. 219/448 cut-off events. For 2218/2226 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2022 event pairs, 35 based on Foata normal form. 3/451 useless extension candidates. Maximal degree in co-relation 1891. Up to 301 conditions per place. [2025-03-17 06:43:48,726 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 52 selfloop transitions, 22 changer transitions 8/85 dead transitions. [2025-03-17 06:43:48,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 85 transitions, 793 flow [2025-03-17 06:43:48,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:43:48,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:43:48,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2025-03-17 06:43:48,728 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2025-03-17 06:43:48,728 INFO L175 Difference]: Start difference. First operand has 81 places, 62 transitions, 491 flow. Second operand 10 states and 111 transitions. [2025-03-17 06:43:48,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 85 transitions, 793 flow [2025-03-17 06:43:48,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 85 transitions, 726 flow, removed 13 selfloop flow, removed 7 redundant places. [2025-03-17 06:43:48,733 INFO L231 Difference]: Finished difference. Result has 84 places, 62 transitions, 479 flow [2025-03-17 06:43:48,733 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=479, PETRI_PLACES=84, PETRI_TRANSITIONS=62} [2025-03-17 06:43:48,733 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2025-03-17 06:43:48,733 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 62 transitions, 479 flow [2025-03-17 06:43:48,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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) [2025-03-17 06:43:48,734 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:48,734 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] [2025-03-17 06:43:48,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-17 06:43:48,734 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:43:48,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:48,734 INFO L85 PathProgramCache]: Analyzing trace with hash 545340688, now seen corresponding path program 10 times [2025-03-17 06:43:48,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:48,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884544736] [2025-03-17 06:43:48,734 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:43:48,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:48,742 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-03-17 06:43:48,750 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 06:43:48,754 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:43:48,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:48,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:48,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884544736] [2025-03-17 06:43:48,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884544736] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:48,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:48,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:43:48,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793577241] [2025-03-17 06:43:48,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:48,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:43:48,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:48,968 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:43:48,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:43:48,991 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2025-03-17 06:43:48,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 62 transitions, 479 flow. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 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) [2025-03-17 06:43:48,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:48,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2025-03-17 06:43:48,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:49,197 INFO L124 PetriNetUnfolderBase]: 260/516 cut-off events. [2025-03-17 06:43:49,197 INFO L125 PetriNetUnfolderBase]: For 2645/2645 co-relation queries the response was YES. [2025-03-17 06:43:49,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2187 conditions, 516 events. 260/516 cut-off events. For 2645/2645 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2260 event pairs, 49 based on Foata normal form. 1/517 useless extension candidates. Maximal degree in co-relation 2159. Up to 339 conditions per place. [2025-03-17 06:43:49,201 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 67 selfloop transitions, 23 changer transitions 5/97 dead transitions. [2025-03-17 06:43:49,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 97 transitions, 877 flow [2025-03-17 06:43:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:43:49,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:43:49,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2025-03-17 06:43:49,203 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2025-03-17 06:43:49,203 INFO L175 Difference]: Start difference. First operand has 84 places, 62 transitions, 479 flow. Second operand 10 states and 114 transitions. [2025-03-17 06:43:49,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 97 transitions, 877 flow [2025-03-17 06:43:49,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 97 transitions, 821 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-03-17 06:43:49,211 INFO L231 Difference]: Finished difference. Result has 87 places, 66 transitions, 546 flow [2025-03-17 06:43:49,211 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=546, PETRI_PLACES=87, PETRI_TRANSITIONS=66} [2025-03-17 06:43:49,213 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 59 predicate places. [2025-03-17 06:43:49,213 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 66 transitions, 546 flow [2025-03-17 06:43:49,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 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) [2025-03-17 06:43:49,213 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:49,213 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] [2025-03-17 06:43:49,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-17 06:43:49,214 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:43:49,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:49,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1312460112, now seen corresponding path program 11 times [2025-03-17 06:43:49,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:49,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487949032] [2025-03-17 06:43:49,215 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:43:49,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:49,220 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-17 06:43:49,228 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 06:43:49,229 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:43:49,229 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:49,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:49,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487949032] [2025-03-17 06:43:49,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487949032] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:49,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:49,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:43:49,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272734312] [2025-03-17 06:43:49,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:49,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:43:49,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:49,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:43:49,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:43:49,453 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-03-17 06:43:49,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 66 transitions, 546 flow. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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) [2025-03-17 06:43:49,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:49,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-03-17 06:43:49,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:49,596 INFO L124 PetriNetUnfolderBase]: 229/465 cut-off events. [2025-03-17 06:43:49,596 INFO L125 PetriNetUnfolderBase]: For 3200/3208 co-relation queries the response was YES. [2025-03-17 06:43:49,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2117 conditions, 465 events. 229/465 cut-off events. For 3200/3208 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2048 event pairs, 30 based on Foata normal form. 3/467 useless extension candidates. Maximal degree in co-relation 2086. Up to 316 conditions per place. [2025-03-17 06:43:49,600 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 56 selfloop transitions, 21 changer transitions 8/88 dead transitions. [2025-03-17 06:43:49,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 88 transitions, 857 flow [2025-03-17 06:43:49,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:43:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:43:49,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2025-03-17 06:43:49,601 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2025-03-17 06:43:49,602 INFO L175 Difference]: Start difference. First operand has 87 places, 66 transitions, 546 flow. Second operand 10 states and 112 transitions. [2025-03-17 06:43:49,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 88 transitions, 857 flow [2025-03-17 06:43:49,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 88 transitions, 780 flow, removed 20 selfloop flow, removed 6 redundant places. [2025-03-17 06:43:49,608 INFO L231 Difference]: Finished difference. Result has 91 places, 66 transitions, 524 flow [2025-03-17 06:43:49,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=524, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2025-03-17 06:43:49,609 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 63 predicate places. [2025-03-17 06:43:49,609 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 524 flow [2025-03-17 06:43:49,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 10 states have internal predecessors, (69), 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) [2025-03-17 06:43:49,610 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:49,610 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] [2025-03-17 06:43:49,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-17 06:43:49,610 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:43:49,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:49,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1528508335, now seen corresponding path program 1 times [2025-03-17 06:43:49,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:49,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751288070] [2025-03-17 06:43:49,610 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:43:49,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:49,616 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 06:43:49,621 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 06:43:49,622 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:43:49,623 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:43:49,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:49,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751288070] [2025-03-17 06:43:49,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751288070] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:43:49,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043239299] [2025-03-17 06:43:49,684 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:43:49,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:43:49,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:43:49,686 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) [2025-03-17 06:43:49,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 06:43:49,727 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 06:43:49,742 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 06:43:49,742 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:43:49,742 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:49,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 06:43:49,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:43:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:49,790 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:43:49,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043239299] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:49,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:43:49,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2025-03-17 06:43:49,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564149173] [2025-03-17 06:43:49,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:49,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:43:49,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:49,791 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:43:49,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:43:49,792 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 28 [2025-03-17 06:43:49,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 524 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 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) [2025-03-17 06:43:49,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:49,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 28 [2025-03-17 06:43:49,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:49,903 INFO L124 PetriNetUnfolderBase]: 281/615 cut-off events. [2025-03-17 06:43:49,903 INFO L125 PetriNetUnfolderBase]: For 5498/5616 co-relation queries the response was YES. [2025-03-17 06:43:49,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2707 conditions, 615 events. 281/615 cut-off events. For 5498/5616 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3049 event pairs, 68 based on Foata normal form. 40/654 useless extension candidates. Maximal degree in co-relation 2675. Up to 205 conditions per place. [2025-03-17 06:43:49,907 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 54 selfloop transitions, 7 changer transitions 24/89 dead transitions. [2025-03-17 06:43:49,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 89 transitions, 845 flow [2025-03-17 06:43:49,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 06:43:49,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 06:43:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2025-03-17 06:43:49,908 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2025-03-17 06:43:49,908 INFO L175 Difference]: Start difference. First operand has 91 places, 66 transitions, 524 flow. Second operand 4 states and 74 transitions. [2025-03-17 06:43:49,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 89 transitions, 845 flow [2025-03-17 06:43:49,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 89 transitions, 772 flow, removed 6 selfloop flow, removed 12 redundant places. [2025-03-17 06:43:49,915 INFO L231 Difference]: Finished difference. Result has 82 places, 39 transitions, 290 flow [2025-03-17 06:43:49,915 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=290, PETRI_PLACES=82, PETRI_TRANSITIONS=39} [2025-03-17 06:43:49,916 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 54 predicate places. [2025-03-17 06:43:49,917 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 39 transitions, 290 flow [2025-03-17 06:43:49,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 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) [2025-03-17 06:43:49,917 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:49,917 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] [2025-03-17 06:43:49,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 06:43:50,121 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,SelfDestructingSolverStorable13 [2025-03-17 06:43:50,121 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:43:50,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:50,122 INFO L85 PathProgramCache]: Analyzing trace with hash -986258679, now seen corresponding path program 1 times [2025-03-17 06:43:50,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:50,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321153358] [2025-03-17 06:43:50,122 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:43:50,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:50,128 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 06:43:50,135 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 06:43:50,135 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:43:50,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:43:50,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:50,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321153358] [2025-03-17 06:43:50,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321153358] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:43:50,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246317183] [2025-03-17 06:43:50,192 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:43:50,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:43:50,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:43:50,194 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) [2025-03-17 06:43:50,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 06:43:50,235 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 06:43:50,250 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 06:43:50,250 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:43:50,250 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:50,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 06:43:50,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:43:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:43:50,298 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:43:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:43:50,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246317183] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:43:50,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:43:50,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-17 06:43:50,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895598127] [2025-03-17 06:43:50,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:43:50,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 06:43:50,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:50,367 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 06:43:50,367 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2025-03-17 06:43:50,367 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 28 [2025-03-17 06:43:50,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 39 transitions, 290 flow. Second operand has 12 states, 12 states have (on average 8.833333333333334) internal successors, (106), 12 states have internal predecessors, (106), 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) [2025-03-17 06:43:50,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:50,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 28 [2025-03-17 06:43:50,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:50,495 INFO L124 PetriNetUnfolderBase]: 281/588 cut-off events. [2025-03-17 06:43:50,496 INFO L125 PetriNetUnfolderBase]: For 5231/5352 co-relation queries the response was YES. [2025-03-17 06:43:50,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2660 conditions, 588 events. 281/588 cut-off events. For 5231/5352 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2626 event pairs, 173 based on Foata normal form. 24/611 useless extension candidates. Maximal degree in co-relation 2629. Up to 396 conditions per place. [2025-03-17 06:43:50,500 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 33 selfloop transitions, 3 changer transitions 25/65 dead transitions. [2025-03-17 06:43:50,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 65 transitions, 593 flow [2025-03-17 06:43:50,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:43:50,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:43:50,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2025-03-17 06:43:50,501 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2025-03-17 06:43:50,501 INFO L175 Difference]: Start difference. First operand has 82 places, 39 transitions, 290 flow. Second operand 6 states and 77 transitions. [2025-03-17 06:43:50,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 65 transitions, 593 flow [2025-03-17 06:43:50,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 468 flow, removed 51 selfloop flow, removed 18 redundant places. [2025-03-17 06:43:50,506 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 232 flow [2025-03-17 06:43:50,507 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2025-03-17 06:43:50,507 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 25 predicate places. [2025-03-17 06:43:50,507 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 232 flow [2025-03-17 06:43:50,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.833333333333334) internal successors, (106), 12 states have internal predecessors, (106), 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) [2025-03-17 06:43:50,507 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:50,507 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] [2025-03-17 06:43:50,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 06:43:50,708 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,SelfDestructingSolverStorable14 [2025-03-17 06:43:50,708 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:43:50,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:50,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1640077337, now seen corresponding path program 2 times [2025-03-17 06:43:50,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:50,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411454332] [2025-03-17 06:43:50,709 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:43:50,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:50,716 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:43:50,723 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 22 of 24 statements. [2025-03-17 06:43:50,724 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:43:50,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:43:50,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:50,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411454332] [2025-03-17 06:43:50,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411454332] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:50,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:50,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:43:50,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882719097] [2025-03-17 06:43:50,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:50,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:43:50,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:50,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:43:50,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-17 06:43:50,790 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2025-03-17 06:43:50,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 232 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 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) [2025-03-17 06:43:50,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:50,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2025-03-17 06:43:50,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:50,917 INFO L124 PetriNetUnfolderBase]: 408/735 cut-off events. [2025-03-17 06:43:50,917 INFO L125 PetriNetUnfolderBase]: For 970/970 co-relation queries the response was YES. [2025-03-17 06:43:50,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2338 conditions, 735 events. 408/735 cut-off events. For 970/970 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2840 event pairs, 64 based on Foata normal form. 0/701 useless extension candidates. Maximal degree in co-relation 2320. Up to 320 conditions per place. [2025-03-17 06:43:50,922 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 60 selfloop transitions, 8 changer transitions 0/70 dead transitions. [2025-03-17 06:43:50,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 70 transitions, 532 flow [2025-03-17 06:43:50,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:43:50,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:43:50,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 69 transitions. [2025-03-17 06:43:50,923 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2025-03-17 06:43:50,923 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 232 flow. Second operand 6 states and 69 transitions. [2025-03-17 06:43:50,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 70 transitions, 532 flow [2025-03-17 06:43:50,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 70 transitions, 502 flow, removed 13 selfloop flow, removed 4 redundant places. [2025-03-17 06:43:50,925 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 263 flow [2025-03-17 06:43:50,925 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=263, PETRI_PLACES=54, PETRI_TRANSITIONS=43} [2025-03-17 06:43:50,926 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 26 predicate places. [2025-03-17 06:43:50,926 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 263 flow [2025-03-17 06:43:50,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 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) [2025-03-17 06:43:50,926 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:50,926 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] [2025-03-17 06:43:50,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-17 06:43:50,926 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:43:50,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:50,927 INFO L85 PathProgramCache]: Analyzing trace with hash 2032874204, now seen corresponding path program 1 times [2025-03-17 06:43:50,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:50,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543326944] [2025-03-17 06:43:50,927 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:43:50,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:50,933 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-17 06:43:50,944 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:43:50,946 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:43:50,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:43:51,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:51,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543326944] [2025-03-17 06:43:51,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543326944] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:43:51,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145211217] [2025-03-17 06:43:51,836 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:43:51,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:43:51,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:43:51,838 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) [2025-03-17 06:43:51,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 06:43:51,878 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-17 06:43:51,900 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:43:51,901 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:43:51,901 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:51,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-17 06:43:51,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:43:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:52,450 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:43:52,875 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:43:52,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2025-03-17 06:43:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:43:53,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145211217] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:43:53,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:43:53,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 13] total 44 [2025-03-17 06:43:53,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334747124] [2025-03-17 06:43:53,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:43:53,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-03-17 06:43:53,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:53,196 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-03-17 06:43:53,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1838, Unknown=0, NotChecked=0, Total=1980 [2025-03-17 06:43:53,279 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2025-03-17 06:43:53,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 43 transitions, 263 flow. Second operand has 45 states, 45 states have (on average 4.711111111111111) internal successors, (212), 45 states have internal predecessors, (212), 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) [2025-03-17 06:43:53,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:53,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2025-03-17 06:43:53,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:55,119 INFO L124 PetriNetUnfolderBase]: 763/1349 cut-off events. [2025-03-17 06:43:55,120 INFO L125 PetriNetUnfolderBase]: For 2595/2595 co-relation queries the response was YES. [2025-03-17 06:43:55,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4668 conditions, 1349 events. 763/1349 cut-off events. For 2595/2595 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 6142 event pairs, 109 based on Foata normal form. 1/1350 useless extension candidates. Maximal degree in co-relation 4651. Up to 776 conditions per place. [2025-03-17 06:43:55,126 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 109 selfloop transitions, 78 changer transitions 5/193 dead transitions. [2025-03-17 06:43:55,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 193 transitions, 1459 flow [2025-03-17 06:43:55,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-03-17 06:43:55,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2025-03-17 06:43:55,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 262 transitions. [2025-03-17 06:43:55,128 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2673469387755102 [2025-03-17 06:43:55,129 INFO L175 Difference]: Start difference. First operand has 54 places, 43 transitions, 263 flow. Second operand 35 states and 262 transitions. [2025-03-17 06:43:55,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 193 transitions, 1459 flow [2025-03-17 06:43:55,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 193 transitions, 1433 flow, removed 8 selfloop flow, removed 2 redundant places. [2025-03-17 06:43:55,135 INFO L231 Difference]: Finished difference. Result has 95 places, 114 transitions, 1073 flow [2025-03-17 06:43:55,135 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1073, PETRI_PLACES=95, PETRI_TRANSITIONS=114} [2025-03-17 06:43:55,136 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 67 predicate places. [2025-03-17 06:43:55,136 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 114 transitions, 1073 flow [2025-03-17 06:43:55,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.711111111111111) internal successors, (212), 45 states have internal predecessors, (212), 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) [2025-03-17 06:43:55,136 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:55,136 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] [2025-03-17 06:43:55,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-17 06:43:55,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:43:55,340 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:43:55,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:55,341 INFO L85 PathProgramCache]: Analyzing trace with hash 745508382, now seen corresponding path program 2 times [2025-03-17 06:43:55,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:55,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491005987] [2025-03-17 06:43:55,341 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:43:55,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:55,346 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-17 06:43:55,362 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:43:55,362 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:43:55,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:43:56,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:56,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491005987] [2025-03-17 06:43:56,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491005987] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:43:56,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990355429] [2025-03-17 06:43:56,159 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:43:56,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:43:56,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:43:56,161 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) [2025-03-17 06:43:56,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 06:43:56,199 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-17 06:43:56,221 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:43:56,221 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:43:56,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:56,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-17 06:43:56,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:43:56,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2025-03-17 06:43:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:43:56,888 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:43:57,481 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:43:57,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2025-03-17 06:43:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:43:57,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990355429] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:43:57,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:43:57,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2025-03-17 06:43:57,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863831444] [2025-03-17 06:43:57,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:43:57,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2025-03-17 06:43:57,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:57,901 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2025-03-17 06:43:57,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2427, Unknown=0, NotChecked=0, Total=2756 [2025-03-17 06:43:57,927 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2025-03-17 06:43:57,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 114 transitions, 1073 flow. Second operand has 53 states, 53 states have (on average 4.471698113207547) internal successors, (237), 53 states have internal predecessors, (237), 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) [2025-03-17 06:43:57,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:57,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2025-03-17 06:43:57,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:44:11,872 INFO L124 PetriNetUnfolderBase]: 2782/4919 cut-off events. [2025-03-17 06:44:11,872 INFO L125 PetriNetUnfolderBase]: For 12612/12612 co-relation queries the response was YES. [2025-03-17 06:44:11,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20490 conditions, 4919 events. 2782/4919 cut-off events. For 12612/12612 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 30071 event pairs, 50 based on Foata normal form. 5/4924 useless extension candidates. Maximal degree in co-relation 20464. Up to 1391 conditions per place. [2025-03-17 06:44:11,902 INFO L140 encePairwiseOnDemand]: 11/28 looper letters, 405 selfloop transitions, 498 changer transitions 39/943 dead transitions. [2025-03-17 06:44:11,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 943 transitions, 8515 flow [2025-03-17 06:44:11,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2025-03-17 06:44:11,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2025-03-17 06:44:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 1048 transitions. [2025-03-17 06:44:11,905 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31452581032412963 [2025-03-17 06:44:11,905 INFO L175 Difference]: Start difference. First operand has 95 places, 114 transitions, 1073 flow. Second operand 119 states and 1048 transitions. [2025-03-17 06:44:11,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 943 transitions, 8515 flow [2025-03-17 06:44:11,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 943 transitions, 8009 flow, removed 246 selfloop flow, removed 5 redundant places. [2025-03-17 06:44:11,974 INFO L231 Difference]: Finished difference. Result has 242 places, 602 transitions, 6617 flow [2025-03-17 06:44:11,974 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=119, PETRI_FLOW=6617, PETRI_PLACES=242, PETRI_TRANSITIONS=602} [2025-03-17 06:44:11,974 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 214 predicate places. [2025-03-17 06:44:11,975 INFO L471 AbstractCegarLoop]: Abstraction has has 242 places, 602 transitions, 6617 flow [2025-03-17 06:44:11,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 4.471698113207547) internal successors, (237), 53 states have internal predecessors, (237), 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) [2025-03-17 06:44:11,975 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:44:11,975 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] [2025-03-17 06:44:11,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 06:44:12,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-17 06:44:12,179 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:44:12,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:44:12,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1180216814, now seen corresponding path program 3 times [2025-03-17 06:44:12,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:44:12,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707858068] [2025-03-17 06:44:12,180 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:44:12,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:44:12,186 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 2 equivalence classes. [2025-03-17 06:44:12,205 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:44:12,205 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:44:12,205 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:44:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:44:12,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:44:12,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707858068] [2025-03-17 06:44:12,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707858068] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:44:12,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712534914] [2025-03-17 06:44:12,955 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:44:12,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:44:12,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:44:12,957 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:44:12,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 06:44:12,996 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 2 equivalence classes. [2025-03-17 06:44:13,011 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:44:13,011 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:44:13,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:44:13,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-17 06:44:13,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:44:13,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2025-03-17 06:44:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:44:13,591 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:44:14,180 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:44:14,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2025-03-17 06:44:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:44:14,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712534914] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:44:14,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:44:14,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2025-03-17 06:44:14,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647513780] [2025-03-17 06:44:14,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:44:14,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2025-03-17 06:44:14,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:44:14,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2025-03-17 06:44:14,604 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=2439, Unknown=0, NotChecked=0, Total=2756 [2025-03-17 06:44:14,639 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2025-03-17 06:44:14,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 602 transitions, 6617 flow. Second operand has 53 states, 53 states have (on average 4.471698113207547) internal successors, (237), 53 states have internal predecessors, (237), 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) [2025-03-17 06:44:14,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:44:14,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2025-03-17 06:44:14,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:44:31,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-17 06:44:40,645 INFO L124 PetriNetUnfolderBase]: 6550/11660 cut-off events. [2025-03-17 06:44:40,645 INFO L125 PetriNetUnfolderBase]: For 91932/91932 co-relation queries the response was YES. [2025-03-17 06:44:40,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65275 conditions, 11660 events. 6550/11660 cut-off events. For 91932/91932 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 80194 event pairs, 228 based on Foata normal form. 6/11666 useless extension candidates. Maximal degree in co-relation 65216. Up to 3167 conditions per place. [2025-03-17 06:44:40,733 INFO L140 encePairwiseOnDemand]: 11/28 looper letters, 761 selfloop transitions, 1365 changer transitions 47/2174 dead transitions. [2025-03-17 06:44:40,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 2174 transitions, 26874 flow [2025-03-17 06:44:40,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2025-03-17 06:44:40,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2025-03-17 06:44:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 1454 transitions. [2025-03-17 06:44:40,739 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30367585630743527 [2025-03-17 06:44:40,739 INFO L175 Difference]: Start difference. First operand has 242 places, 602 transitions, 6617 flow. Second operand 171 states and 1454 transitions. [2025-03-17 06:44:40,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 2174 transitions, 26874 flow [2025-03-17 06:44:41,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 2174 transitions, 23847 flow, removed 1502 selfloop flow, removed 8 redundant places. [2025-03-17 06:44:41,383 INFO L231 Difference]: Finished difference. Result has 465 places, 1707 transitions, 22337 flow [2025-03-17 06:44:41,384 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5624, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=434, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=171, PETRI_FLOW=22337, PETRI_PLACES=465, PETRI_TRANSITIONS=1707} [2025-03-17 06:44:41,384 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 437 predicate places. [2025-03-17 06:44:41,384 INFO L471 AbstractCegarLoop]: Abstraction has has 465 places, 1707 transitions, 22337 flow [2025-03-17 06:44:41,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 4.471698113207547) internal successors, (237), 53 states have internal predecessors, (237), 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) [2025-03-17 06:44:41,384 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:44:41,384 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] [2025-03-17 06:44:41,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-17 06:44:41,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:44:41,585 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:44:41,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:44:41,586 INFO L85 PathProgramCache]: Analyzing trace with hash 763551816, now seen corresponding path program 4 times [2025-03-17 06:44:41,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:44:41,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826467804] [2025-03-17 06:44:41,586 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:44:41,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:44:41,591 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-17 06:44:41,607 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:44:41,607 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:44:41,607 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:44:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:44:42,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:44:42,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826467804] [2025-03-17 06:44:42,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826467804] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:44:42,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318726147] [2025-03-17 06:44:42,385 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:44:42,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:44:42,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:44:42,387 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) [2025-03-17 06:44:42,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 06:44:42,425 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-17 06:44:42,446 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:44:42,446 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:44:42,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:44:42,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-17 06:44:42,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:44:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:44:43,179 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:44:43,910 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:44:43,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 35 [2025-03-17 06:44:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:44:44,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318726147] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:44:44,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:44:44,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 53 [2025-03-17 06:44:44,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701090996] [2025-03-17 06:44:44,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:44:44,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2025-03-17 06:44:44,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:44:44,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2025-03-17 06:44:44,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2631, Unknown=0, NotChecked=0, Total=2862 [2025-03-17 06:44:44,460 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2025-03-17 06:44:44,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 1707 transitions, 22337 flow. Second operand has 54 states, 54 states have (on average 4.444444444444445) internal successors, (240), 54 states have internal predecessors, (240), 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) [2025-03-17 06:44:44,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:44:44,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2025-03-17 06:44:44,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:44:54,853 INFO L124 PetriNetUnfolderBase]: 6800/12137 cut-off events. [2025-03-17 06:44:54,854 INFO L125 PetriNetUnfolderBase]: For 207969/207969 co-relation queries the response was YES. [2025-03-17 06:44:54,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79715 conditions, 12137 events. 6800/12137 cut-off events. For 207969/207969 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 83730 event pairs, 352 based on Foata normal form. 2/12139 useless extension candidates. Maximal degree in co-relation 79591. Up to 3975 conditions per place. [2025-03-17 06:44:54,980 INFO L140 encePairwiseOnDemand]: 12/28 looper letters, 1041 selfloop transitions, 1192 changer transitions 10/2244 dead transitions. [2025-03-17 06:44:54,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 2244 transitions, 32394 flow [2025-03-17 06:44:54,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2025-03-17 06:44:54,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2025-03-17 06:44:54,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 586 transitions. [2025-03-17 06:44:54,985 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28669275929549903 [2025-03-17 06:44:54,986 INFO L175 Difference]: Start difference. First operand has 465 places, 1707 transitions, 22337 flow. Second operand 73 states and 586 transitions. [2025-03-17 06:44:54,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 2244 transitions, 32394 flow [2025-03-17 06:44:57,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 2244 transitions, 29625 flow, removed 1306 selfloop flow, removed 27 redundant places. [2025-03-17 06:44:57,878 INFO L231 Difference]: Finished difference. Result has 525 places, 1931 transitions, 27222 flow [2025-03-17 06:44:57,879 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=20075, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=979, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=27222, PETRI_PLACES=525, PETRI_TRANSITIONS=1931} [2025-03-17 06:44:57,879 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 497 predicate places. [2025-03-17 06:44:57,880 INFO L471 AbstractCegarLoop]: Abstraction has has 525 places, 1931 transitions, 27222 flow [2025-03-17 06:44:57,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.444444444444445) internal successors, (240), 54 states have internal predecessors, (240), 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) [2025-03-17 06:44:57,880 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:44:57,880 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] [2025-03-17 06:44:57,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 06:44:58,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:44:58,084 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:44:58,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:44:58,085 INFO L85 PathProgramCache]: Analyzing trace with hash 648710384, now seen corresponding path program 5 times [2025-03-17 06:44:58,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:44:58,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916206012] [2025-03-17 06:44:58,085 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:44:58,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:44:58,091 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-17 06:44:58,108 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:44:58,108 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:44:58,108 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:44:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:44:58,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:44:58,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916206012] [2025-03-17 06:44:58,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916206012] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:44:58,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13096312] [2025-03-17 06:44:58,992 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:44:58,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:44:58,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:44:58,994 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) [2025-03-17 06:44:58,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 06:44:59,039 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-17 06:44:59,060 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:44:59,060 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:44:59,060 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:44:59,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-17 06:44:59,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:44:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:44:59,500 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:44:59,951 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:44:59,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2025-03-17 06:45:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:45:00,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13096312] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:45:00,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:45:00,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 13] total 44 [2025-03-17 06:45:00,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170937726] [2025-03-17 06:45:00,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:45:00,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-03-17 06:45:00,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:00,196 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-03-17 06:45:00,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1827, Unknown=0, NotChecked=0, Total=1980 [2025-03-17 06:45:00,212 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2025-03-17 06:45:00,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 1931 transitions, 27222 flow. Second operand has 45 states, 45 states have (on average 4.711111111111111) internal successors, (212), 45 states have internal predecessors, (212), 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) [2025-03-17 06:45:00,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:00,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2025-03-17 06:45:00,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:05,593 INFO L124 PetriNetUnfolderBase]: 6989/12557 cut-off events. [2025-03-17 06:45:05,593 INFO L125 PetriNetUnfolderBase]: For 221912/221912 co-relation queries the response was YES. [2025-03-17 06:45:05,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85204 conditions, 12557 events. 6989/12557 cut-off events. For 221912/221912 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 88641 event pairs, 663 based on Foata normal form. 8/12564 useless extension candidates. Maximal degree in co-relation 85063. Up to 8048 conditions per place. [2025-03-17 06:45:05,728 INFO L140 encePairwiseOnDemand]: 13/28 looper letters, 1075 selfloop transitions, 995 changer transitions 43/2114 dead transitions. [2025-03-17 06:45:05,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 2114 transitions, 33572 flow [2025-03-17 06:45:05,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-17 06:45:05,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-17 06:45:05,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 213 transitions. [2025-03-17 06:45:05,729 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30428571428571427 [2025-03-17 06:45:05,729 INFO L175 Difference]: Start difference. First operand has 525 places, 1931 transitions, 27222 flow. Second operand 25 states and 213 transitions. [2025-03-17 06:45:05,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 2114 transitions, 33572 flow [2025-03-17 06:45:08,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 2114 transitions, 32721 flow, removed 192 selfloop flow, removed 19 redundant places. [2025-03-17 06:45:08,862 INFO L231 Difference]: Finished difference. Result has 540 places, 1970 transitions, 30557 flow [2025-03-17 06:45:08,863 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=26392, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1931, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=954, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=959, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=30557, PETRI_PLACES=540, PETRI_TRANSITIONS=1970} [2025-03-17 06:45:08,863 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 512 predicate places. [2025-03-17 06:45:08,863 INFO L471 AbstractCegarLoop]: Abstraction has has 540 places, 1970 transitions, 30557 flow [2025-03-17 06:45:08,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.711111111111111) internal successors, (212), 45 states have internal predecessors, (212), 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) [2025-03-17 06:45:08,864 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:08,864 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] [2025-03-17 06:45:08,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-17 06:45:09,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:09,064 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-17 06:45:09,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:09,065 INFO L85 PathProgramCache]: Analyzing trace with hash -871220368, now seen corresponding path program 6 times [2025-03-17 06:45:09,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:09,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957838703] [2025-03-17 06:45:09,065 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:45:09,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:09,071 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 2 equivalence classes. [2025-03-17 06:45:09,081 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:45:09,082 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 06:45:09,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:09,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:09,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957838703] [2025-03-17 06:45:09,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957838703] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:45:09,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554311505] [2025-03-17 06:45:09,836 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:45:09,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:09,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:45:09,838 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:45:09,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 06:45:09,877 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 2 equivalence classes. [2025-03-17 06:45:09,907 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:45:09,907 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-17 06:45:09,907 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:09,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-17 06:45:09,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:45:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:10,541 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:45:11,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:45:11,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 24 [2025-03-17 06:45:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:11,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554311505] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:45:11,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:45:11,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 50 [2025-03-17 06:45:11,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10510945] [2025-03-17 06:45:11,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:45:11,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-03-17 06:45:11,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:11,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-03-17 06:45:11,764 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2308, Unknown=0, NotChecked=0, Total=2550 [2025-03-17 06:45:11,777 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2025-03-17 06:45:11,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 1970 transitions, 30557 flow. Second operand has 51 states, 51 states have (on average 4.529411764705882) internal successors, (231), 51 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) [2025-03-17 06:45:11,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:11,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2025-03-17 06:45:11,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand