./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed 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/unroll-cond-2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:39:50,411 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:39:50,470 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:39:50,478 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:39:50,479 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:39:50,500 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:39:50,501 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:39:50,501 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:39:50,501 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:39:50,501 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:39:50,501 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:39:50,501 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:39:50,502 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:39:50,502 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:39:50,502 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:39:50,502 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:39:50,502 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:39:50,502 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:39:50,502 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:39:50,502 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:39:50,502 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:39:50,502 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:39:50,502 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:39:50,502 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:39:50,502 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:39:50,502 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:39:50,502 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:39:50,502 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:39:50,502 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:39:50,503 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:39:50,503 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:39:50,503 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:39:50,503 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:39:50,503 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:39:50,503 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:39:50,503 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:39:50,503 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:39:50,503 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:39:50,503 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:39:50,503 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:39:50,503 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:39:50,503 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:39:50,503 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:39:50,503 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 -> 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b [2025-03-08 17:39:50,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:39:50,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:39:50,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:39:50,741 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:39:50,742 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:39:50,743 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2025-03-08 17:39:51,901 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35997cb21/3a5c5b88100f4b9fb02a6c2915aeab36/FLAGdc4ceccf2 [2025-03-08 17:39:52,128 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:39:52,132 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2025-03-08 17:39:52,139 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35997cb21/3a5c5b88100f4b9fb02a6c2915aeab36/FLAGdc4ceccf2 [2025-03-08 17:39:52,475 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35997cb21/3a5c5b88100f4b9fb02a6c2915aeab36 [2025-03-08 17:39:52,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:39:52,480 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:39:52,482 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:39:52,483 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:39:52,486 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:39:52,487 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:39:52" (1/1) ... [2025-03-08 17:39:52,488 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c7367a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:52, skipping insertion in model container [2025-03-08 17:39:52,489 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:39:52" (1/1) ... [2025-03-08 17:39:52,507 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:39:52,637 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/unroll-cond-2.wvr.c[2500,2513] [2025-03-08 17:39:52,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:39:52,652 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:39:52,667 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/unroll-cond-2.wvr.c[2500,2513] [2025-03-08 17:39:52,672 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:39:52,685 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:39:52,686 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:52 WrapperNode [2025-03-08 17:39:52,686 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:39:52,687 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:39:52,687 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:39:52,687 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:39:52,691 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:52" (1/1) ... [2025-03-08 17:39:52,696 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:52" (1/1) ... [2025-03-08 17:39:52,713 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 125 [2025-03-08 17:39:52,713 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:39:52,714 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:39:52,714 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:39:52,714 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:39:52,720 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:52" (1/1) ... [2025-03-08 17:39:52,720 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:52" (1/1) ... [2025-03-08 17:39:52,726 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:52" (1/1) ... [2025-03-08 17:39:52,741 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 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]. [2025-03-08 17:39:52,745 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:52" (1/1) ... [2025-03-08 17:39:52,745 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:52" (1/1) ... [2025-03-08 17:39:52,752 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:52" (1/1) ... [2025-03-08 17:39:52,755 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:52" (1/1) ... [2025-03-08 17:39:52,756 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:52" (1/1) ... [2025-03-08 17:39:52,757 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:52" (1/1) ... [2025-03-08 17:39:52,761 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:39:52,761 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:39:52,762 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:39:52,762 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:39:52,763 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:52" (1/1) ... [2025-03-08 17:39:52,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:39:52,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:39:52,789 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) [2025-03-08 17:39:52,794 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 [2025-03-08 17:39:52,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:39:52,811 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-08 17:39:52,811 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-08 17:39:52,811 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-08 17:39:52,811 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-08 17:39:52,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:39:52,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 17:39:52,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 17:39:52,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 17:39:52,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 17:39:52,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:39:52,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:39:52,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 17:39:52,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 17:39:52,813 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:39:52,877 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:39:52,878 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:39:53,056 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:39:53,056 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:39:53,208 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:39:53,208 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:39:53,208 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:39:53 BoogieIcfgContainer [2025-03-08 17:39:53,208 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:39:53,210 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:39:53,210 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:39:53,213 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:39:53,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:39:52" (1/3) ... [2025-03-08 17:39:53,214 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537eff20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:39:53, skipping insertion in model container [2025-03-08 17:39:53,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:39:52" (2/3) ... [2025-03-08 17:39:53,214 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537eff20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:39:53, skipping insertion in model container [2025-03-08 17:39:53,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:39:53" (3/3) ... [2025-03-08 17:39:53,215 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2025-03-08 17:39:53,227 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:39:53,228 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-cond-2.wvr.c that has 3 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-08 17:39:53,229 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:39:53,274 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-08 17:39:53,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2025-03-08 17:39:53,319 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2025-03-08 17:39:53,322 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:39:53,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2025-03-08 17:39:53,326 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2025-03-08 17:39:53,329 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2025-03-08 17:39:53,338 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:39:53,351 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;@1b0b0501, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:39:53,352 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-08 17:39:53,359 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:39:53,360 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2025-03-08 17:39:53,360 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:39:53,360 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:39:53,361 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:39:53,361 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:39:53,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:39:53,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1840295052, now seen corresponding path program 1 times [2025-03-08 17:39:53,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:39:53,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251033425] [2025-03-08 17:39:53,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:39:53,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:39:53,435 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 17:39:53,465 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:39:53,467 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:39:53,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:39:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:39:53,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:39:53,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251033425] [2025-03-08 17:39:53,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251033425] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:39:53,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:39:53,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 17:39:53,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507112486] [2025-03-08 17:39:53,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:39:53,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:39:53,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:39:53,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:39:53,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:39:53,713 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:39:53,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2025-03-08 17:39:53,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:39:53,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:39:53,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:39:53,771 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2025-03-08 17:39:53,771 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-03-08 17:39:53,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 71 events. 38/71 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 118 event pairs, 22 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 120. Up to 70 conditions per place. [2025-03-08 17:39:53,773 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 15 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2025-03-08 17:39:53,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 82 flow [2025-03-08 17:39:53,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:39:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:39:53,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2025-03-08 17:39:53,783 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2025-03-08 17:39:53,784 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 27 transitions. [2025-03-08 17:39:53,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 82 flow [2025-03-08 17:39:53,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-08 17:39:53,789 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2025-03-08 17:39:53,791 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2025-03-08 17:39:53,793 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2025-03-08 17:39:53,793 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2025-03-08 17:39:53,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2025-03-08 17:39:53,793 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:39:53,793 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:39:53,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:39:53,794 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:39:53,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:39:53,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1349574716, now seen corresponding path program 1 times [2025-03-08 17:39:53,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:39:53,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513445122] [2025-03-08 17:39:53,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:39:53,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:39:53,803 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 17:39:53,822 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:39:53,822 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:39:53,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:39:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:39:54,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:39:54,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513445122] [2025-03-08 17:39:54,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513445122] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:39:54,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:39:54,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:39:54,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350889435] [2025-03-08 17:39:54,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:39:54,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:39:54,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:39:54,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:39:54,030 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:39:54,030 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:39:54,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:39:54,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:39:54,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:39:54,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:39:54,192 INFO L124 PetriNetUnfolderBase]: 67/123 cut-off events. [2025-03-08 17:39:54,193 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-08 17:39:54,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 123 events. 67/123 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 335 event pairs, 2 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 249. Up to 77 conditions per place. [2025-03-08 17:39:54,194 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 30 selfloop transitions, 11 changer transitions 2/44 dead transitions. [2025-03-08 17:39:54,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 44 transitions, 194 flow [2025-03-08 17:39:54,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:39:54,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:39:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2025-03-08 17:39:54,195 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2025-03-08 17:39:54,196 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 6 states and 62 transitions. [2025-03-08 17:39:54,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 44 transitions, 194 flow [2025-03-08 17:39:54,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 44 transitions, 190 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-08 17:39:54,197 INFO L231 Difference]: Finished difference. Result has 27 places, 28 transitions, 114 flow [2025-03-08 17:39:54,197 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=27, PETRI_TRANSITIONS=28} [2025-03-08 17:39:54,197 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2025-03-08 17:39:54,199 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 28 transitions, 114 flow [2025-03-08 17:39:54,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:39:54,199 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:39:54,199 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:39:54,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 17:39:54,200 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:39:54,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:39:54,200 INFO L85 PathProgramCache]: Analyzing trace with hash -493281410, now seen corresponding path program 2 times [2025-03-08 17:39:54,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:39:54,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226145068] [2025-03-08 17:39:54,200 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:39:54,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:39:54,210 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:39:54,222 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 14 of 15 statements. [2025-03-08 17:39:54,223 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 17:39:54,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:39:54,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:39:54,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:39:54,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226145068] [2025-03-08 17:39:54,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226145068] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:39:54,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:39:54,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:39:54,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139701573] [2025-03-08 17:39:54,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:39:54,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:39:54,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:39:54,385 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:39:54,385 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:39:54,385 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:39:54,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 28 transitions, 114 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:39:54,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:39:54,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:39:54,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:39:54,497 INFO L124 PetriNetUnfolderBase]: 67/125 cut-off events. [2025-03-08 17:39:54,497 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2025-03-08 17:39:54,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 125 events. 67/125 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 331 event pairs, 3 based on Foata normal form. 1/104 useless extension candidates. Maximal degree in co-relation 362. Up to 77 conditions per place. [2025-03-08 17:39:54,499 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 29 selfloop transitions, 15 changer transitions 2/47 dead transitions. [2025-03-08 17:39:54,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 47 transitions, 268 flow [2025-03-08 17:39:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:39:54,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:39:54,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 64 transitions. [2025-03-08 17:39:54,500 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2025-03-08 17:39:54,500 INFO L175 Difference]: Start difference. First operand has 27 places, 28 transitions, 114 flow. Second operand 7 states and 64 transitions. [2025-03-08 17:39:54,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 47 transitions, 268 flow [2025-03-08 17:39:54,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 47 transitions, 260 flow, removed 4 selfloop flow, removed 0 redundant places. [2025-03-08 17:39:54,503 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 173 flow [2025-03-08 17:39:54,503 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=173, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2025-03-08 17:39:54,504 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2025-03-08 17:39:54,504 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 173 flow [2025-03-08 17:39:54,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:39:54,504 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:39:54,504 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:39:54,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 17:39:54,504 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:39:54,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:39:54,505 INFO L85 PathProgramCache]: Analyzing trace with hash -209840974, now seen corresponding path program 3 times [2025-03-08 17:39:54,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:39:54,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703507844] [2025-03-08 17:39:54,505 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:39:54,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:39:54,514 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:39:54,520 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 14 of 15 statements. [2025-03-08 17:39:54,520 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-08 17:39:54,520 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:39:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:39:54,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:39:54,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703507844] [2025-03-08 17:39:54,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703507844] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:39:54,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:39:54,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:39:54,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330819167] [2025-03-08 17:39:54,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:39:54,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:39:54,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:39:54,634 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:39:54,634 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:39:54,634 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:39:54,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 173 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:39:54,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:39:54,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:39:54,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:39:54,741 INFO L124 PetriNetUnfolderBase]: 83/158 cut-off events. [2025-03-08 17:39:54,741 INFO L125 PetriNetUnfolderBase]: For 107/107 co-relation queries the response was YES. [2025-03-08 17:39:54,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 158 events. 83/158 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 450 event pairs, 6 based on Foata normal form. 1/130 useless extension candidates. Maximal degree in co-relation 520. Up to 58 conditions per place. [2025-03-08 17:39:54,743 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 35 selfloop transitions, 19 changer transitions 2/57 dead transitions. [2025-03-08 17:39:54,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 57 transitions, 368 flow [2025-03-08 17:39:54,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:39:54,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:39:54,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 76 transitions. [2025-03-08 17:39:54,744 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.475 [2025-03-08 17:39:54,744 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 173 flow. Second operand 8 states and 76 transitions. [2025-03-08 17:39:54,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 57 transitions, 368 flow [2025-03-08 17:39:54,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 57 transitions, 341 flow, removed 9 selfloop flow, removed 2 redundant places. [2025-03-08 17:39:54,749 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 232 flow [2025-03-08 17:39:54,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=232, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2025-03-08 17:39:54,750 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2025-03-08 17:39:54,750 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 232 flow [2025-03-08 17:39:54,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:39:54,750 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:39:54,750 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:39:54,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 17:39:54,751 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:39:54,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:39:54,752 INFO L85 PathProgramCache]: Analyzing trace with hash 664979026, now seen corresponding path program 1 times [2025-03-08 17:39:54,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:39:54,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745551633] [2025-03-08 17:39:54,752 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:39:54,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:39:54,761 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 17:39:54,780 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:39:54,781 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:39:54,781 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:39:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:39:54,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:39:54,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745551633] [2025-03-08 17:39:54,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745551633] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:39:54,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476657655] [2025-03-08 17:39:54,991 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:39:54,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:39:54,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:39:54,993 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) [2025-03-08 17:39:54,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 17:39:55,041 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 17:39:55,059 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:39:55,059 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:39:55,059 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:39:55,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-08 17:39:55,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:39:55,202 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 15 treesize of output 7 [2025-03-08 17:39:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:39:55,214 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:39:55,406 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 17:39:55,408 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 22 [2025-03-08 17:39:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:39:55,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476657655] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:39:55,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:39:55,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-03-08 17:39:55,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876096286] [2025-03-08 17:39:55,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:39:55,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-08 17:39:55,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:39:55,464 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-08 17:39:55,464 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2025-03-08 17:39:55,465 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:39:55,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 232 flow. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 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) [2025-03-08 17:39:55,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:39:55,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:39:55,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:39:55,754 INFO L124 PetriNetUnfolderBase]: 121/225 cut-off events. [2025-03-08 17:39:55,756 INFO L125 PetriNetUnfolderBase]: For 309/309 co-relation queries the response was YES. [2025-03-08 17:39:55,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 867 conditions, 225 events. 121/225 cut-off events. For 309/309 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 726 event pairs, 5 based on Foata normal form. 1/225 useless extension candidates. Maximal degree in co-relation 841. Up to 131 conditions per place. [2025-03-08 17:39:55,760 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 47 selfloop transitions, 22 changer transitions 3/73 dead transitions. [2025-03-08 17:39:55,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 73 transitions, 525 flow [2025-03-08 17:39:55,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:39:55,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:39:55,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2025-03-08 17:39:55,762 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47 [2025-03-08 17:39:55,762 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 232 flow. Second operand 10 states and 94 transitions. [2025-03-08 17:39:55,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 73 transitions, 525 flow [2025-03-08 17:39:55,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 73 transitions, 492 flow, removed 5 selfloop flow, removed 5 redundant places. [2025-03-08 17:39:55,766 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 321 flow [2025-03-08 17:39:55,766 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=321, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2025-03-08 17:39:55,766 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2025-03-08 17:39:55,766 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 321 flow [2025-03-08 17:39:55,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 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) [2025-03-08 17:39:55,767 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:39:55,767 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:39:55,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 17:39:55,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:39:55,971 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:39:55,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:39:55,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1657429743, now seen corresponding path program 1 times [2025-03-08 17:39:55,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:39:55,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376648826] [2025-03-08 17:39:55,972 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:39:55,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:39:55,979 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 17:39:55,989 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:39:55,989 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:39:55,989 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:39:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:39:56,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:39:56,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376648826] [2025-03-08 17:39:56,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376648826] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:39:56,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154535902] [2025-03-08 17:39:56,094 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:39:56,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:39:56,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:39:56,096 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) [2025-03-08 17:39:56,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 17:39:56,132 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 17:39:56,147 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:39:56,147 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:39:56,148 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:39:56,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-08 17:39:56,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:39:56,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 17:39:56,427 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 17:39:56,427 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 17 [2025-03-08 17:39:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:39:56,447 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:39:57,032 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 72 treesize of output 64 [2025-03-08 17:39:57,059 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:39:57,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 116 [2025-03-08 17:39:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:39:57,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154535902] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:39:57,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:39:57,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 22 [2025-03-08 17:39:57,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820928740] [2025-03-08 17:39:57,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:39:57,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 17:39:57,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:39:57,522 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 17:39:57,522 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2025-03-08 17:39:57,522 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:39:57,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 321 flow. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 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) [2025-03-08 17:39:57,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:39:57,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:39:57,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:39:58,634 INFO L124 PetriNetUnfolderBase]: 365/652 cut-off events. [2025-03-08 17:39:58,634 INFO L125 PetriNetUnfolderBase]: For 1188/1188 co-relation queries the response was YES. [2025-03-08 17:39:58,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2741 conditions, 652 events. 365/652 cut-off events. For 1188/1188 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2880 event pairs, 25 based on Foata normal form. 13/665 useless extension candidates. Maximal degree in co-relation 2592. Up to 235 conditions per place. [2025-03-08 17:39:58,638 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 81 selfloop transitions, 62 changer transitions 57/201 dead transitions. [2025-03-08 17:39:58,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 201 transitions, 1563 flow [2025-03-08 17:39:58,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-08 17:39:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-03-08 17:39:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 270 transitions. [2025-03-08 17:39:58,640 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2025-03-08 17:39:58,640 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 321 flow. Second operand 30 states and 270 transitions. [2025-03-08 17:39:58,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 201 transitions, 1563 flow [2025-03-08 17:39:58,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 201 transitions, 1482 flow, removed 23 selfloop flow, removed 3 redundant places. [2025-03-08 17:39:58,647 INFO L231 Difference]: Finished difference. Result has 85 places, 89 transitions, 817 flow [2025-03-08 17:39:58,648 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=817, PETRI_PLACES=85, PETRI_TRANSITIONS=89} [2025-03-08 17:39:58,648 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 64 predicate places. [2025-03-08 17:39:58,648 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 89 transitions, 817 flow [2025-03-08 17:39:58,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 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) [2025-03-08 17:39:58,649 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:39:58,649 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:39:58,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 17:39:58,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-03-08 17:39:58,853 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:39:58,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:39:58,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1050676446, now seen corresponding path program 2 times [2025-03-08 17:39:58,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:39:58,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453447931] [2025-03-08 17:39:58,854 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:39:58,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:39:58,859 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-08 17:39:58,880 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:39:58,880 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:39:58,880 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:39:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:39:59,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:39:59,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453447931] [2025-03-08 17:39:59,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453447931] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:39:59,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407017300] [2025-03-08 17:39:59,069 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:39:59,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:39:59,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:39:59,071 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) [2025-03-08 17:39:59,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 17:39:59,107 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-08 17:39:59,122 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:39:59,123 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:39:59,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:39:59,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-08 17:39:59,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:39:59,237 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 15 treesize of output 7 [2025-03-08 17:39:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:39:59,240 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:39:59,327 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:39:59,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 33 [2025-03-08 17:39:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:39:59,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407017300] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:39:59,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:39:59,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2025-03-08 17:39:59,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278773415] [2025-03-08 17:39:59,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:39:59,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 17:39:59,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:39:59,402 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 17:39:59,402 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:39:59,402 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:39:59,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 89 transitions, 817 flow. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 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) [2025-03-08 17:39:59,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:39:59,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:39:59,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:39:59,665 INFO L124 PetriNetUnfolderBase]: 253/460 cut-off events. [2025-03-08 17:39:59,665 INFO L125 PetriNetUnfolderBase]: For 1468/1468 co-relation queries the response was YES. [2025-03-08 17:39:59,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2328 conditions, 460 events. 253/460 cut-off events. For 1468/1468 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1881 event pairs, 23 based on Foata normal form. 1/459 useless extension candidates. Maximal degree in co-relation 2257. Up to 350 conditions per place. [2025-03-08 17:39:59,671 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 72 selfloop transitions, 41 changer transitions 3/117 dead transitions. [2025-03-08 17:39:59,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 117 transitions, 1188 flow [2025-03-08 17:39:59,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 17:39:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-08 17:39:59,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 91 transitions. [2025-03-08 17:39:59,674 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2025-03-08 17:39:59,674 INFO L175 Difference]: Start difference. First operand has 85 places, 89 transitions, 817 flow. Second operand 11 states and 91 transitions. [2025-03-08 17:39:59,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 117 transitions, 1188 flow [2025-03-08 17:39:59,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 117 transitions, 1060 flow, removed 41 selfloop flow, removed 11 redundant places. [2025-03-08 17:39:59,685 INFO L231 Difference]: Finished difference. Result has 79 places, 95 transitions, 855 flow [2025-03-08 17:39:59,685 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=855, PETRI_PLACES=79, PETRI_TRANSITIONS=95} [2025-03-08 17:39:59,685 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 58 predicate places. [2025-03-08 17:39:59,687 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 95 transitions, 855 flow [2025-03-08 17:39:59,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 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) [2025-03-08 17:39:59,687 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:39:59,687 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:39:59,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 17:39:59,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:39:59,888 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:39:59,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:39:59,888 INFO L85 PathProgramCache]: Analyzing trace with hash 743933394, now seen corresponding path program 3 times [2025-03-08 17:39:59,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:39:59,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070334073] [2025-03-08 17:39:59,889 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:39:59,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:39:59,894 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-03-08 17:39:59,906 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:39:59,907 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:39:59,907 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:40:00,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:00,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070334073] [2025-03-08 17:40:00,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070334073] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:00,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58025449] [2025-03-08 17:40:00,095 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:40:00,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:00,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:00,097 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) [2025-03-08 17:40:00,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 17:40:00,132 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-03-08 17:40:00,154 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:40:00,154 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:40:00,154 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:00,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-08 17:40:00,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:00,230 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 15 treesize of output 7 [2025-03-08 17:40:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:40:00,235 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:00,274 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:40:00,275 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 81 treesize of output 73 [2025-03-08 17:40:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:40:00,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58025449] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:00,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:00,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 9 [2025-03-08 17:40:00,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042684388] [2025-03-08 17:40:00,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:00,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 17:40:00,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:00,372 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 17:40:00,372 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-03-08 17:40:00,372 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:00,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 95 transitions, 855 flow. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 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) [2025-03-08 17:40:00,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:00,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:00,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:00,499 INFO L124 PetriNetUnfolderBase]: 255/468 cut-off events. [2025-03-08 17:40:00,499 INFO L125 PetriNetUnfolderBase]: For 1536/1536 co-relation queries the response was YES. [2025-03-08 17:40:00,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2322 conditions, 468 events. 255/468 cut-off events. For 1536/1536 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1915 event pairs, 36 based on Foata normal form. 1/469 useless extension candidates. Maximal degree in co-relation 2163. Up to 365 conditions per place. [2025-03-08 17:40:00,502 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 74 selfloop transitions, 29 changer transitions 3/107 dead transitions. [2025-03-08 17:40:00,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 107 transitions, 1122 flow [2025-03-08 17:40:00,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:40:00,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:40:00,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 61 transitions. [2025-03-08 17:40:00,503 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2025-03-08 17:40:00,503 INFO L175 Difference]: Start difference. First operand has 79 places, 95 transitions, 855 flow. Second operand 7 states and 61 transitions. [2025-03-08 17:40:00,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 107 transitions, 1122 flow [2025-03-08 17:40:00,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 107 transitions, 1037 flow, removed 8 selfloop flow, removed 7 redundant places. [2025-03-08 17:40:00,509 INFO L231 Difference]: Finished difference. Result has 79 places, 96 transitions, 849 flow [2025-03-08 17:40:00,510 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=849, PETRI_PLACES=79, PETRI_TRANSITIONS=96} [2025-03-08 17:40:00,510 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 58 predicate places. [2025-03-08 17:40:00,510 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 96 transitions, 849 flow [2025-03-08 17:40:00,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 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) [2025-03-08 17:40:00,510 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:00,511 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:00,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:00,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:00,715 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:00,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:00,715 INFO L85 PathProgramCache]: Analyzing trace with hash 2066376821, now seen corresponding path program 2 times [2025-03-08 17:40:00,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:00,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328402018] [2025-03-08 17:40:00,715 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:40:00,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:00,721 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:00,728 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:00,729 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:40:00,729 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:00,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:00,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328402018] [2025-03-08 17:40:00,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328402018] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:00,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527879870] [2025-03-08 17:40:00,809 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:40:00,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:00,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:00,811 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) [2025-03-08 17:40:00,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 17:40:00,847 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:00,868 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:00,868 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:40:00,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:00,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 17:40:00,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:00,897 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:00,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527879870] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:00,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:00,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-03-08 17:40:00,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420251205] [2025-03-08 17:40:00,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:00,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 17:40:00,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:00,964 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 17:40:00,964 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-03-08 17:40:00,964 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:00,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 96 transitions, 849 flow. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 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) [2025-03-08 17:40:00,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:00,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:00,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:01,397 INFO L124 PetriNetUnfolderBase]: 303/565 cut-off events. [2025-03-08 17:40:01,398 INFO L125 PetriNetUnfolderBase]: For 1761/1761 co-relation queries the response was YES. [2025-03-08 17:40:01,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2639 conditions, 565 events. 303/565 cut-off events. For 1761/1761 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2505 event pairs, 30 based on Foata normal form. 15/580 useless extension candidates. Maximal degree in co-relation 2454. Up to 146 conditions per place. [2025-03-08 17:40:01,403 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 94 selfloop transitions, 70 changer transitions 5/170 dead transitions. [2025-03-08 17:40:01,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 170 transitions, 1612 flow [2025-03-08 17:40:01,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 17:40:01,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-08 17:40:01,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 134 transitions. [2025-03-08 17:40:01,405 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41875 [2025-03-08 17:40:01,406 INFO L175 Difference]: Start difference. First operand has 79 places, 96 transitions, 849 flow. Second operand 16 states and 134 transitions. [2025-03-08 17:40:01,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 170 transitions, 1612 flow [2025-03-08 17:40:01,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 170 transitions, 1551 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-03-08 17:40:01,417 INFO L231 Difference]: Finished difference. Result has 94 places, 118 transitions, 1182 flow [2025-03-08 17:40:01,417 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1182, PETRI_PLACES=94, PETRI_TRANSITIONS=118} [2025-03-08 17:40:01,418 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 73 predicate places. [2025-03-08 17:40:01,418 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 118 transitions, 1182 flow [2025-03-08 17:40:01,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 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) [2025-03-08 17:40:01,418 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:01,418 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:01,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:01,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:01,619 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:01,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:01,619 INFO L85 PathProgramCache]: Analyzing trace with hash 19119941, now seen corresponding path program 1 times [2025-03-08 17:40:01,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:01,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370211691] [2025-03-08 17:40:01,620 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:40:01,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:01,625 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-08 17:40:01,634 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:01,634 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:40:01,634 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:40:01,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:01,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370211691] [2025-03-08 17:40:01,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370211691] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:01,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542335663] [2025-03-08 17:40:01,786 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:40:01,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:01,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:01,788 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) [2025-03-08 17:40:01,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 17:40:01,821 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-08 17:40:01,834 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:01,834 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:40:01,834 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:01,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-08 17:40:01,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:01,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 17:40:02,002 INFO L349 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2025-03-08 17:40:02,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 63 [2025-03-08 17:40:02,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:40:02,020 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:02,294 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 220 treesize of output 194 [2025-03-08 17:40:02,374 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:40:02,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 778 treesize of output 574 [2025-03-08 17:40:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:40:10,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542335663] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:10,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:10,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2025-03-08 17:40:10,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536392150] [2025-03-08 17:40:10,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:10,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:40:10,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:10,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:40:10,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:40:10,079 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:10,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 118 transitions, 1182 flow. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:10,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:10,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:10,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:11,115 INFO L124 PetriNetUnfolderBase]: 360/723 cut-off events. [2025-03-08 17:40:11,115 INFO L125 PetriNetUnfolderBase]: For 3247/3247 co-relation queries the response was YES. [2025-03-08 17:40:11,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3833 conditions, 723 events. 360/723 cut-off events. For 3247/3247 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3738 event pairs, 29 based on Foata normal form. 13/735 useless extension candidates. Maximal degree in co-relation 3538. Up to 201 conditions per place. [2025-03-08 17:40:11,132 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 92 selfloop transitions, 64 changer transitions 73/230 dead transitions. [2025-03-08 17:40:11,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 230 transitions, 2418 flow [2025-03-08 17:40:11,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-08 17:40:11,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-03-08 17:40:11,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 247 transitions. [2025-03-08 17:40:11,136 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44107142857142856 [2025-03-08 17:40:11,136 INFO L175 Difference]: Start difference. First operand has 94 places, 118 transitions, 1182 flow. Second operand 28 states and 247 transitions. [2025-03-08 17:40:11,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 230 transitions, 2418 flow [2025-03-08 17:40:11,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 230 transitions, 2135 flow, removed 123 selfloop flow, removed 3 redundant places. [2025-03-08 17:40:11,150 INFO L231 Difference]: Finished difference. Result has 123 places, 104 transitions, 1053 flow [2025-03-08 17:40:11,151 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1053, PETRI_PLACES=123, PETRI_TRANSITIONS=104} [2025-03-08 17:40:11,152 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 102 predicate places. [2025-03-08 17:40:11,152 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 104 transitions, 1053 flow [2025-03-08 17:40:11,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:11,152 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:11,152 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:11,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:11,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:11,353 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:11,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:11,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1796501523, now seen corresponding path program 3 times [2025-03-08 17:40:11,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:11,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381218737] [2025-03-08 17:40:11,355 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:40:11,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:11,362 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:11,372 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:11,372 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:40:11,372 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:11,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:11,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381218737] [2025-03-08 17:40:11,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381218737] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:11,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297755161] [2025-03-08 17:40:11,458 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:40:11,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:11,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:11,460 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) [2025-03-08 17:40:11,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 17:40:11,498 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:11,541 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:11,541 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:40:11,541 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:11,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 17:40:11,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:11,572 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:11,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:11,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297755161] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:11,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:11,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-03-08 17:40:11,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777792586] [2025-03-08 17:40:11,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:11,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 17:40:11,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:11,657 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 17:40:11,657 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-03-08 17:40:11,657 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:11,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 104 transitions, 1053 flow. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 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) [2025-03-08 17:40:11,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:11,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:11,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:12,093 INFO L124 PetriNetUnfolderBase]: 313/668 cut-off events. [2025-03-08 17:40:12,094 INFO L125 PetriNetUnfolderBase]: For 2944/2944 co-relation queries the response was YES. [2025-03-08 17:40:12,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3334 conditions, 668 events. 313/668 cut-off events. For 2944/2944 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3508 event pairs, 38 based on Foata normal form. 15/682 useless extension candidates. Maximal degree in co-relation 3165. Up to 173 conditions per place. [2025-03-08 17:40:12,099 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 105 selfloop transitions, 100 changer transitions 0/206 dead transitions. [2025-03-08 17:40:12,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 206 transitions, 2166 flow [2025-03-08 17:40:12,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-08 17:40:12,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-08 17:40:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 181 transitions. [2025-03-08 17:40:12,101 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4525 [2025-03-08 17:40:12,101 INFO L175 Difference]: Start difference. First operand has 123 places, 104 transitions, 1053 flow. Second operand 20 states and 181 transitions. [2025-03-08 17:40:12,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 206 transitions, 2166 flow [2025-03-08 17:40:12,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 206 transitions, 1971 flow, removed 58 selfloop flow, removed 17 redundant places. [2025-03-08 17:40:12,113 INFO L231 Difference]: Finished difference. Result has 125 places, 149 transitions, 1654 flow [2025-03-08 17:40:12,114 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1654, PETRI_PLACES=125, PETRI_TRANSITIONS=149} [2025-03-08 17:40:12,114 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 104 predicate places. [2025-03-08 17:40:12,115 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 149 transitions, 1654 flow [2025-03-08 17:40:12,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 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) [2025-03-08 17:40:12,116 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:12,116 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:12,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-08 17:40:12,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:12,316 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:12,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:12,317 INFO L85 PathProgramCache]: Analyzing trace with hash 67466208, now seen corresponding path program 4 times [2025-03-08 17:40:12,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:12,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724081220] [2025-03-08 17:40:12,317 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:40:12,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:12,321 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:12,336 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:12,336 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:40:12,336 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:40:12,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:12,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724081220] [2025-03-08 17:40:12,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724081220] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:12,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431680033] [2025-03-08 17:40:12,434 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:40:12,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:12,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:12,436 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) [2025-03-08 17:40:12,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 17:40:12,471 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:12,485 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:12,485 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:40:12,486 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:12,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-08 17:40:12,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:12,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 17:40:12,614 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 17:40:12,615 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2025-03-08 17:40:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:40:12,632 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:12,814 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 130 treesize of output 116 [2025-03-08 17:40:12,840 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:40:12,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 298 treesize of output 240 [2025-03-08 17:40:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:40:13,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431680033] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:13,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:13,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2025-03-08 17:40:13,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259177882] [2025-03-08 17:40:13,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:13,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:40:13,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:13,425 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:40:13,425 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:40:13,425 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:13,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 149 transitions, 1654 flow. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:13,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:13,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:13,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:13,957 INFO L124 PetriNetUnfolderBase]: 373/759 cut-off events. [2025-03-08 17:40:13,957 INFO L125 PetriNetUnfolderBase]: For 3358/3358 co-relation queries the response was YES. [2025-03-08 17:40:13,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4149 conditions, 759 events. 373/759 cut-off events. For 3358/3358 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3973 event pairs, 20 based on Foata normal form. 5/763 useless extension candidates. Maximal degree in co-relation 4014. Up to 403 conditions per place. [2025-03-08 17:40:13,962 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 110 selfloop transitions, 69 changer transitions 50/230 dead transitions. [2025-03-08 17:40:13,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 230 transitions, 2583 flow [2025-03-08 17:40:13,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-08 17:40:13,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-08 17:40:13,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 216 transitions. [2025-03-08 17:40:13,964 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2025-03-08 17:40:13,964 INFO L175 Difference]: Start difference. First operand has 125 places, 149 transitions, 1654 flow. Second operand 27 states and 216 transitions. [2025-03-08 17:40:13,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 230 transitions, 2583 flow [2025-03-08 17:40:13,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 230 transitions, 2498 flow, removed 36 selfloop flow, removed 2 redundant places. [2025-03-08 17:40:13,979 INFO L231 Difference]: Finished difference. Result has 154 places, 147 transitions, 1710 flow [2025-03-08 17:40:13,980 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1549, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1710, PETRI_PLACES=154, PETRI_TRANSITIONS=147} [2025-03-08 17:40:13,980 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 133 predicate places. [2025-03-08 17:40:13,980 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 147 transitions, 1710 flow [2025-03-08 17:40:13,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:13,980 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:13,980 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:13,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:14,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-08 17:40:14,185 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:14,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:14,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1879618413, now seen corresponding path program 4 times [2025-03-08 17:40:14,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:14,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983061494] [2025-03-08 17:40:14,186 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:40:14,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:14,189 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:14,194 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:14,195 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:40:14,195 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:14,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:14,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983061494] [2025-03-08 17:40:14,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983061494] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:14,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774044150] [2025-03-08 17:40:14,291 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:40:14,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:14,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:14,293 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:14,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 17:40:14,328 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:14,366 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:14,366 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:40:14,366 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:14,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 17:40:14,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:14,401 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:14,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774044150] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:14,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:14,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-03-08 17:40:14,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615884032] [2025-03-08 17:40:14,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:14,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 17:40:14,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:14,478 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 17:40:14,478 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2025-03-08 17:40:14,478 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:14,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 147 transitions, 1710 flow. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 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) [2025-03-08 17:40:14,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:14,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:14,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:14,860 INFO L124 PetriNetUnfolderBase]: 341/641 cut-off events. [2025-03-08 17:40:14,860 INFO L125 PetriNetUnfolderBase]: For 3709/3709 co-relation queries the response was YES. [2025-03-08 17:40:14,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3835 conditions, 641 events. 341/641 cut-off events. For 3709/3709 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2991 event pairs, 45 based on Foata normal form. 18/658 useless extension candidates. Maximal degree in co-relation 3770. Up to 209 conditions per place. [2025-03-08 17:40:14,865 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 105 selfloop transitions, 82 changer transitions 0/188 dead transitions. [2025-03-08 17:40:14,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 188 transitions, 2303 flow [2025-03-08 17:40:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 17:40:14,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-08 17:40:14,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 143 transitions. [2025-03-08 17:40:14,866 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2025-03-08 17:40:14,866 INFO L175 Difference]: Start difference. First operand has 154 places, 147 transitions, 1710 flow. Second operand 15 states and 143 transitions. [2025-03-08 17:40:14,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 188 transitions, 2303 flow [2025-03-08 17:40:14,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 188 transitions, 2090 flow, removed 78 selfloop flow, removed 12 redundant places. [2025-03-08 17:40:14,878 INFO L231 Difference]: Finished difference. Result has 136 places, 148 transitions, 1749 flow [2025-03-08 17:40:14,878 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1459, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1749, PETRI_PLACES=136, PETRI_TRANSITIONS=148} [2025-03-08 17:40:14,879 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 115 predicate places. [2025-03-08 17:40:14,879 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 148 transitions, 1749 flow [2025-03-08 17:40:14,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 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) [2025-03-08 17:40:14,879 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:14,879 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:14,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:15,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-08 17:40:15,080 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:15,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:15,080 INFO L85 PathProgramCache]: Analyzing trace with hash -2129604195, now seen corresponding path program 5 times [2025-03-08 17:40:15,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:15,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290696122] [2025-03-08 17:40:15,080 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:40:15,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:15,085 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:15,091 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:15,091 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:40:15,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:15,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:15,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290696122] [2025-03-08 17:40:15,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290696122] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:15,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069588878] [2025-03-08 17:40:15,163 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:40:15,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:15,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:15,165 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:15,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 17:40:15,204 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:15,263 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:15,263 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:40:15,263 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:15,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 17:40:15,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:15,314 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:15,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069588878] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:15,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:15,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-08 17:40:15,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370117459] [2025-03-08 17:40:15,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:15,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 17:40:15,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:15,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 17:40:15,366 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2025-03-08 17:40:15,366 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:15,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 148 transitions, 1749 flow. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:15,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:15,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:15,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:15,827 INFO L124 PetriNetUnfolderBase]: 620/1141 cut-off events. [2025-03-08 17:40:15,827 INFO L125 PetriNetUnfolderBase]: For 6390/6390 co-relation queries the response was YES. [2025-03-08 17:40:15,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6725 conditions, 1141 events. 620/1141 cut-off events. For 6390/6390 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5897 event pairs, 15 based on Foata normal form. 6/1146 useless extension candidates. Maximal degree in co-relation 6663. Up to 263 conditions per place. [2025-03-08 17:40:15,835 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 188 selfloop transitions, 115 changer transitions 1/305 dead transitions. [2025-03-08 17:40:15,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 305 transitions, 4012 flow [2025-03-08 17:40:15,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 17:40:15,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-08 17:40:15,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 171 transitions. [2025-03-08 17:40:15,836 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.475 [2025-03-08 17:40:15,836 INFO L175 Difference]: Start difference. First operand has 136 places, 148 transitions, 1749 flow. Second operand 18 states and 171 transitions. [2025-03-08 17:40:15,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 305 transitions, 4012 flow [2025-03-08 17:40:15,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 305 transitions, 3827 flow, removed 34 selfloop flow, removed 9 redundant places. [2025-03-08 17:40:15,858 INFO L231 Difference]: Finished difference. Result has 150 places, 208 transitions, 2718 flow [2025-03-08 17:40:15,858 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2718, PETRI_PLACES=150, PETRI_TRANSITIONS=208} [2025-03-08 17:40:15,858 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 129 predicate places. [2025-03-08 17:40:15,859 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 208 transitions, 2718 flow [2025-03-08 17:40:15,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:15,859 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:15,859 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:15,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:16,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-08 17:40:16,063 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:16,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:16,063 INFO L85 PathProgramCache]: Analyzing trace with hash -199675415, now seen corresponding path program 6 times [2025-03-08 17:40:16,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:16,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347067876] [2025-03-08 17:40:16,063 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:40:16,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:16,068 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:16,074 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:16,075 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:40:16,075 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:16,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:16,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347067876] [2025-03-08 17:40:16,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347067876] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:16,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381593836] [2025-03-08 17:40:16,144 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:40:16,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:16,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:16,145 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:16,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 17:40:16,184 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:16,212 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:16,212 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:40:16,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:16,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 17:40:16,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:16,254 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:16,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381593836] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:16,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:16,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-08 17:40:16,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514756412] [2025-03-08 17:40:16,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:16,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 17:40:16,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:16,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 17:40:16,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2025-03-08 17:40:16,303 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:16,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 208 transitions, 2718 flow. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:16,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:16,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:16,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:16,735 INFO L124 PetriNetUnfolderBase]: 710/1301 cut-off events. [2025-03-08 17:40:16,735 INFO L125 PetriNetUnfolderBase]: For 10085/10085 co-relation queries the response was YES. [2025-03-08 17:40:16,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8266 conditions, 1301 events. 710/1301 cut-off events. For 10085/10085 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6825 event pairs, 37 based on Foata normal form. 14/1314 useless extension candidates. Maximal degree in co-relation 8198. Up to 359 conditions per place. [2025-03-08 17:40:16,743 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 152 selfloop transitions, 168 changer transitions 0/321 dead transitions. [2025-03-08 17:40:16,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 321 transitions, 4504 flow [2025-03-08 17:40:16,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 17:40:16,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-08 17:40:16,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 176 transitions. [2025-03-08 17:40:16,744 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4631578947368421 [2025-03-08 17:40:16,744 INFO L175 Difference]: Start difference. First operand has 150 places, 208 transitions, 2718 flow. Second operand 19 states and 176 transitions. [2025-03-08 17:40:16,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 321 transitions, 4504 flow [2025-03-08 17:40:16,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 321 transitions, 4262 flow, removed 96 selfloop flow, removed 5 redundant places. [2025-03-08 17:40:16,777 INFO L231 Difference]: Finished difference. Result has 170 places, 246 transitions, 3584 flow [2025-03-08 17:40:16,777 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2488, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3584, PETRI_PLACES=170, PETRI_TRANSITIONS=246} [2025-03-08 17:40:16,777 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 149 predicate places. [2025-03-08 17:40:16,777 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 246 transitions, 3584 flow [2025-03-08 17:40:16,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:16,778 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:16,778 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:16,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:16,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-08 17:40:16,978 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:16,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:16,979 INFO L85 PathProgramCache]: Analyzing trace with hash -276536195, now seen corresponding path program 7 times [2025-03-08 17:40:16,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:16,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444048827] [2025-03-08 17:40:16,979 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:40:16,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:16,986 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-08 17:40:16,998 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:16,998 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:40:16,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:17,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:17,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:17,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444048827] [2025-03-08 17:40:17,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444048827] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:17,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726159656] [2025-03-08 17:40:17,089 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:40:17,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:17,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:17,091 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:17,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 17:40:17,128 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-08 17:40:17,148 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:17,148 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:40:17,148 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:17,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 17:40:17,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:17,197 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:17,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726159656] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:17,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:17,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-08 17:40:17,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337572214] [2025-03-08 17:40:17,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:17,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 17:40:17,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:17,263 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 17:40:17,263 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2025-03-08 17:40:17,263 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:17,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 246 transitions, 3584 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 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) [2025-03-08 17:40:17,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:17,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:17,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:17,691 INFO L124 PetriNetUnfolderBase]: 793/1450 cut-off events. [2025-03-08 17:40:17,691 INFO L125 PetriNetUnfolderBase]: For 15236/15236 co-relation queries the response was YES. [2025-03-08 17:40:17,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10005 conditions, 1450 events. 793/1450 cut-off events. For 15236/15236 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7817 event pairs, 62 based on Foata normal form. 9/1458 useless extension candidates. Maximal degree in co-relation 9933. Up to 512 conditions per place. [2025-03-08 17:40:17,705 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 175 selfloop transitions, 159 changer transitions 0/335 dead transitions. [2025-03-08 17:40:17,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 335 transitions, 5297 flow [2025-03-08 17:40:17,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 17:40:17,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-08 17:40:17,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 140 transitions. [2025-03-08 17:40:17,707 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4375 [2025-03-08 17:40:17,707 INFO L175 Difference]: Start difference. First operand has 170 places, 246 transitions, 3584 flow. Second operand 16 states and 140 transitions. [2025-03-08 17:40:17,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 335 transitions, 5297 flow [2025-03-08 17:40:17,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 335 transitions, 5059 flow, removed 98 selfloop flow, removed 6 redundant places. [2025-03-08 17:40:17,767 INFO L231 Difference]: Finished difference. Result has 186 places, 273 transitions, 4315 flow [2025-03-08 17:40:17,767 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3404, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4315, PETRI_PLACES=186, PETRI_TRANSITIONS=273} [2025-03-08 17:40:17,768 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 165 predicate places. [2025-03-08 17:40:17,769 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 273 transitions, 4315 flow [2025-03-08 17:40:17,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 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) [2025-03-08 17:40:17,769 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:17,769 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:17,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:17,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-08 17:40:17,970 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:17,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:17,970 INFO L85 PathProgramCache]: Analyzing trace with hash -258102169, now seen corresponding path program 8 times [2025-03-08 17:40:17,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:17,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343168357] [2025-03-08 17:40:17,970 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:40:17,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:17,975 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:17,982 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:17,982 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:40:17,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:18,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:18,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343168357] [2025-03-08 17:40:18,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343168357] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:18,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766489982] [2025-03-08 17:40:18,059 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:40:18,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:18,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:18,061 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:18,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 17:40:18,098 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-08 17:40:18,143 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:40:18,143 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:40:18,143 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:18,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 17:40:18,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:18,176 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:18,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766489982] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:18,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:18,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-03-08 17:40:18,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512766259] [2025-03-08 17:40:18,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:18,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 17:40:18,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:18,255 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 17:40:18,255 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-03-08 17:40:18,255 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:18,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 273 transitions, 4315 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:18,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:18,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:18,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:18,690 INFO L124 PetriNetUnfolderBase]: 869/1613 cut-off events. [2025-03-08 17:40:18,690 INFO L125 PetriNetUnfolderBase]: For 18428/18428 co-relation queries the response was YES. [2025-03-08 17:40:18,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11480 conditions, 1613 events. 869/1613 cut-off events. For 18428/18428 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 9074 event pairs, 233 based on Foata normal form. 15/1627 useless extension candidates. Maximal degree in co-relation 11403. Up to 1153 conditions per place. [2025-03-08 17:40:18,701 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 237 selfloop transitions, 113 changer transitions 3/354 dead transitions. [2025-03-08 17:40:18,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 354 transitions, 5946 flow [2025-03-08 17:40:18,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 17:40:18,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-08 17:40:18,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 133 transitions. [2025-03-08 17:40:18,702 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44333333333333336 [2025-03-08 17:40:18,702 INFO L175 Difference]: Start difference. First operand has 186 places, 273 transitions, 4315 flow. Second operand 15 states and 133 transitions. [2025-03-08 17:40:18,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 354 transitions, 5946 flow [2025-03-08 17:40:18,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 354 transitions, 5871 flow, removed 14 selfloop flow, removed 4 redundant places. [2025-03-08 17:40:18,769 INFO L231 Difference]: Finished difference. Result has 201 places, 305 transitions, 5182 flow [2025-03-08 17:40:18,769 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4223, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5182, PETRI_PLACES=201, PETRI_TRANSITIONS=305} [2025-03-08 17:40:18,769 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 180 predicate places. [2025-03-08 17:40:18,769 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 305 transitions, 5182 flow [2025-03-08 17:40:18,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:18,770 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:18,770 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:18,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:18,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-08 17:40:18,970 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:18,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:18,970 INFO L85 PathProgramCache]: Analyzing trace with hash -308051378, now seen corresponding path program 5 times [2025-03-08 17:40:18,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:18,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768195317] [2025-03-08 17:40:18,971 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:40:18,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:18,974 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:40:18,980 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:40:18,980 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:40:18,980 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:19,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:19,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768195317] [2025-03-08 17:40:19,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768195317] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:19,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656069545] [2025-03-08 17:40:19,034 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:40:19,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:19,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:19,036 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:19,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 17:40:19,073 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:40:19,099 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:40:19,099 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:40:19,099 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:19,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 17:40:19,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:19,148 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:19,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656069545] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:19,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:19,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2025-03-08 17:40:19,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896353443] [2025-03-08 17:40:19,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:19,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 17:40:19,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:19,217 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 17:40:19,217 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:40:19,217 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:19,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 305 transitions, 5182 flow. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 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) [2025-03-08 17:40:19,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:19,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:19,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:23,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-08 17:40:35,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-08 17:40:43,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-08 17:40:47,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-03-08 17:40:51,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-08 17:40:51,789 INFO L124 PetriNetUnfolderBase]: 1036/1914 cut-off events. [2025-03-08 17:40:51,789 INFO L125 PetriNetUnfolderBase]: For 23605/23605 co-relation queries the response was YES. [2025-03-08 17:40:51,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14083 conditions, 1914 events. 1036/1914 cut-off events. For 23605/23605 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11063 event pairs, 74 based on Foata normal form. 56/1969 useless extension candidates. Maximal degree in co-relation 14000. Up to 588 conditions per place. [2025-03-08 17:40:51,804 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 271 selfloop transitions, 147 changer transitions 2/421 dead transitions. [2025-03-08 17:40:51,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 421 transitions, 7525 flow [2025-03-08 17:40:51,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 17:40:51,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-08 17:40:51,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 147 transitions. [2025-03-08 17:40:51,805 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49 [2025-03-08 17:40:51,805 INFO L175 Difference]: Start difference. First operand has 201 places, 305 transitions, 5182 flow. Second operand 15 states and 147 transitions. [2025-03-08 17:40:51,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 421 transitions, 7525 flow [2025-03-08 17:40:51,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 421 transitions, 7331 flow, removed 77 selfloop flow, removed 8 redundant places. [2025-03-08 17:40:51,890 INFO L231 Difference]: Finished difference. Result has 211 places, 316 transitions, 5653 flow [2025-03-08 17:40:51,890 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4784, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5653, PETRI_PLACES=211, PETRI_TRANSITIONS=316} [2025-03-08 17:40:51,890 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 190 predicate places. [2025-03-08 17:40:51,890 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 316 transitions, 5653 flow [2025-03-08 17:40:51,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 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) [2025-03-08 17:40:51,890 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:51,890 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:51,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:52,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:52,091 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:52,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:52,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1626497579, now seen corresponding path program 2 times [2025-03-08 17:40:52,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:52,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032094189] [2025-03-08 17:40:52,091 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:40:52,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:52,095 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:40:52,102 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:40:52,102 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:40:52,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:52,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:52,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032094189] [2025-03-08 17:40:52,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032094189] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:52,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456719108] [2025-03-08 17:40:52,215 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:40:52,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:52,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:52,217 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:52,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 17:40:52,259 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:40:52,301 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:40:52,301 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:40:52,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:52,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 17:40:52,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:52,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:52,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456719108] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:52,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:52,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2025-03-08 17:40:52,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581746270] [2025-03-08 17:40:52,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:52,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 17:40:52,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:52,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 17:40:52,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2025-03-08 17:40:52,401 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:52,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 316 transitions, 5653 flow. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 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) [2025-03-08 17:40:52,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:52,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:52,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:52,805 INFO L124 PetriNetUnfolderBase]: 1022/1857 cut-off events. [2025-03-08 17:40:52,805 INFO L125 PetriNetUnfolderBase]: For 25282/25282 co-relation queries the response was YES. [2025-03-08 17:40:52,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14535 conditions, 1857 events. 1022/1857 cut-off events. For 25282/25282 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 10393 event pairs, 170 based on Foata normal form. 19/1875 useless extension candidates. Maximal degree in co-relation 14450. Up to 665 conditions per place. [2025-03-08 17:40:52,819 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 195 selfloop transitions, 156 changer transitions 3/355 dead transitions. [2025-03-08 17:40:52,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 355 transitions, 6703 flow [2025-03-08 17:40:52,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:40:52,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:40:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2025-03-08 17:40:52,820 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.495 [2025-03-08 17:40:52,820 INFO L175 Difference]: Start difference. First operand has 211 places, 316 transitions, 5653 flow. Second operand 10 states and 99 transitions. [2025-03-08 17:40:52,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 355 transitions, 6703 flow [2025-03-08 17:40:52,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 355 transitions, 6326 flow, removed 124 selfloop flow, removed 8 redundant places. [2025-03-08 17:40:52,922 INFO L231 Difference]: Finished difference. Result has 214 places, 317 transitions, 5718 flow [2025-03-08 17:40:52,923 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5278, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5718, PETRI_PLACES=214, PETRI_TRANSITIONS=317} [2025-03-08 17:40:52,923 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 193 predicate places. [2025-03-08 17:40:52,923 INFO L471 AbstractCegarLoop]: Abstraction has has 214 places, 317 transitions, 5718 flow [2025-03-08 17:40:52,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 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) [2025-03-08 17:40:52,923 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:52,923 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:52,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:53,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:53,124 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:53,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:53,124 INFO L85 PathProgramCache]: Analyzing trace with hash 774865558, now seen corresponding path program 6 times [2025-03-08 17:40:53,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:53,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569835860] [2025-03-08 17:40:53,125 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:40:53,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:53,130 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:40:53,137 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:40:53,137 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:40:53,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:53,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:53,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569835860] [2025-03-08 17:40:53,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569835860] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:53,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082605825] [2025-03-08 17:40:53,214 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:40:53,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:53,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:53,216 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:53,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 17:40:53,256 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:40:53,286 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:40:53,286 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:40:53,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:53,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 17:40:53,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:53,304 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:53,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082605825] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:53,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:53,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2025-03-08 17:40:53,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417387614] [2025-03-08 17:40:53,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:53,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 17:40:53,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:53,352 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 17:40:53,352 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2025-03-08 17:40:53,352 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:53,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 317 transitions, 5718 flow. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 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) [2025-03-08 17:40:53,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:53,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:53,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:53,846 INFO L124 PetriNetUnfolderBase]: 1017/1841 cut-off events. [2025-03-08 17:40:53,846 INFO L125 PetriNetUnfolderBase]: For 26402/26402 co-relation queries the response was YES. [2025-03-08 17:40:53,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14154 conditions, 1841 events. 1017/1841 cut-off events. For 26402/26402 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10315 event pairs, 55 based on Foata normal form. 2/1842 useless extension candidates. Maximal degree in co-relation 14071. Up to 479 conditions per place. [2025-03-08 17:40:53,856 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 317 selfloop transitions, 150 changer transitions 2/470 dead transitions. [2025-03-08 17:40:53,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 470 transitions, 8919 flow [2025-03-08 17:40:53,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 17:40:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-08 17:40:53,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 153 transitions. [2025-03-08 17:40:53,857 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2025-03-08 17:40:53,858 INFO L175 Difference]: Start difference. First operand has 214 places, 317 transitions, 5718 flow. Second operand 17 states and 153 transitions. [2025-03-08 17:40:53,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 470 transitions, 8919 flow [2025-03-08 17:40:53,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 470 transitions, 8698 flow, removed 21 selfloop flow, removed 7 redundant places. [2025-03-08 17:40:53,946 INFO L231 Difference]: Finished difference. Result has 221 places, 323 transitions, 5948 flow [2025-03-08 17:40:53,946 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5540, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5948, PETRI_PLACES=221, PETRI_TRANSITIONS=323} [2025-03-08 17:40:53,947 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 200 predicate places. [2025-03-08 17:40:53,947 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 323 transitions, 5948 flow [2025-03-08 17:40:53,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 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) [2025-03-08 17:40:53,947 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:53,947 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:53,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:54,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:54,148 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:54,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:54,148 INFO L85 PathProgramCache]: Analyzing trace with hash -275041784, now seen corresponding path program 7 times [2025-03-08 17:40:54,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:54,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332418838] [2025-03-08 17:40:54,148 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:40:54,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:54,153 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:40:54,156 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:40:54,156 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:40:54,156 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:54,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:54,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332418838] [2025-03-08 17:40:54,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332418838] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:54,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610433410] [2025-03-08 17:40:54,217 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:40:54,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:54,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:54,219 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:54,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 17:40:54,260 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:40:54,282 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:40:54,282 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:40:54,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:54,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 17:40:54,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:54,332 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:54,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610433410] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:54,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:54,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2025-03-08 17:40:54,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747595677] [2025-03-08 17:40:54,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:54,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 17:40:54,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:54,462 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 17:40:54,462 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2025-03-08 17:40:54,462 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:54,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 323 transitions, 5948 flow. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:54,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:54,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:54,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:55,121 INFO L124 PetriNetUnfolderBase]: 1193/2253 cut-off events. [2025-03-08 17:40:55,121 INFO L125 PetriNetUnfolderBase]: For 31422/31422 co-relation queries the response was YES. [2025-03-08 17:40:55,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16930 conditions, 2253 events. 1193/2253 cut-off events. For 31422/31422 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13668 event pairs, 200 based on Foata normal form. 15/2267 useless extension candidates. Maximal degree in co-relation 16849. Up to 1149 conditions per place. [2025-03-08 17:40:55,132 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 280 selfloop transitions, 172 changer transitions 2/455 dead transitions. [2025-03-08 17:40:55,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 455 transitions, 8692 flow [2025-03-08 17:40:55,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 17:40:55,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-08 17:40:55,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 159 transitions. [2025-03-08 17:40:55,134 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4676470588235294 [2025-03-08 17:40:55,134 INFO L175 Difference]: Start difference. First operand has 221 places, 323 transitions, 5948 flow. Second operand 17 states and 159 transitions. [2025-03-08 17:40:55,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 455 transitions, 8692 flow [2025-03-08 17:40:55,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 455 transitions, 8490 flow, removed 27 selfloop flow, removed 9 redundant places. [2025-03-08 17:40:55,227 INFO L231 Difference]: Finished difference. Result has 236 places, 385 transitions, 7621 flow [2025-03-08 17:40:55,227 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5783, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7621, PETRI_PLACES=236, PETRI_TRANSITIONS=385} [2025-03-08 17:40:55,227 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 215 predicate places. [2025-03-08 17:40:55,227 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 385 transitions, 7621 flow [2025-03-08 17:40:55,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:55,227 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:55,227 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:55,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-08 17:40:55,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:55,428 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:55,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:55,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1519568056, now seen corresponding path program 8 times [2025-03-08 17:40:55,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:55,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032137705] [2025-03-08 17:40:55,429 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:40:55,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:55,432 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:40:55,438 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:40:55,438 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:40:55,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:55,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:55,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032137705] [2025-03-08 17:40:55,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032137705] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:55,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31429644] [2025-03-08 17:40:55,510 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:40:55,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:55,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:55,512 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:55,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 17:40:55,553 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:40:55,603 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:40:55,603 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:40:55,603 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:55,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 17:40:55,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:55,641 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:55,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31429644] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:55,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:55,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 11 [2025-03-08 17:40:55,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792251290] [2025-03-08 17:40:55,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:55,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 17:40:55,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:55,719 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 17:40:55,720 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2025-03-08 17:40:55,720 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:55,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 385 transitions, 7621 flow. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 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) [2025-03-08 17:40:55,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:55,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:55,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:56,480 INFO L124 PetriNetUnfolderBase]: 1186/2227 cut-off events. [2025-03-08 17:40:56,480 INFO L125 PetriNetUnfolderBase]: For 36549/36549 co-relation queries the response was YES. [2025-03-08 17:40:56,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18039 conditions, 2227 events. 1186/2227 cut-off events. For 36549/36549 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13360 event pairs, 221 based on Foata normal form. 2/2228 useless extension candidates. Maximal degree in co-relation 17951. Up to 923 conditions per place. [2025-03-08 17:40:56,496 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 312 selfloop transitions, 122 changer transitions 2/437 dead transitions. [2025-03-08 17:40:56,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 437 transitions, 9175 flow [2025-03-08 17:40:56,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 17:40:56,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-08 17:40:56,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 101 transitions. [2025-03-08 17:40:56,497 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2025-03-08 17:40:56,497 INFO L175 Difference]: Start difference. First operand has 236 places, 385 transitions, 7621 flow. Second operand 12 states and 101 transitions. [2025-03-08 17:40:56,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 437 transitions, 9175 flow [2025-03-08 17:40:56,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 437 transitions, 8995 flow, removed 69 selfloop flow, removed 7 redundant places. [2025-03-08 17:40:56,637 INFO L231 Difference]: Finished difference. Result has 240 places, 384 transitions, 7675 flow [2025-03-08 17:40:56,637 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7425, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7675, PETRI_PLACES=240, PETRI_TRANSITIONS=384} [2025-03-08 17:40:56,638 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 219 predicate places. [2025-03-08 17:40:56,638 INFO L471 AbstractCegarLoop]: Abstraction has has 240 places, 384 transitions, 7675 flow [2025-03-08 17:40:56,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 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) [2025-03-08 17:40:56,638 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:56,638 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:56,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:56,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:56,838 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:56,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:56,839 INFO L85 PathProgramCache]: Analyzing trace with hash 262813794, now seen corresponding path program 9 times [2025-03-08 17:40:56,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:56,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725719410] [2025-03-08 17:40:56,839 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:40:56,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:56,843 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:40:56,847 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:40:56,847 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:40:56,847 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:56,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:56,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725719410] [2025-03-08 17:40:56,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725719410] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:56,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721562899] [2025-03-08 17:40:56,929 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:40:56,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:56,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:56,932 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:56,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 17:40:56,973 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:40:57,018 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:40:57,019 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:40:57,019 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:57,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 17:40:57,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:57,072 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:57,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721562899] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:57,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:57,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2025-03-08 17:40:57,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961572298] [2025-03-08 17:40:57,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:57,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 17:40:57,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:57,201 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 17:40:57,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:40:57,201 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:57,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 384 transitions, 7675 flow. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 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) [2025-03-08 17:40:57,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:57,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:57,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:40:57,896 INFO L124 PetriNetUnfolderBase]: 1237/2377 cut-off events. [2025-03-08 17:40:57,896 INFO L125 PetriNetUnfolderBase]: For 38041/38041 co-relation queries the response was YES. [2025-03-08 17:40:57,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19129 conditions, 2377 events. 1237/2377 cut-off events. For 38041/38041 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14887 event pairs, 246 based on Foata normal form. 15/2391 useless extension candidates. Maximal degree in co-relation 19042. Up to 1461 conditions per place. [2025-03-08 17:40:57,912 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 313 selfloop transitions, 160 changer transitions 2/476 dead transitions. [2025-03-08 17:40:57,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 476 transitions, 9772 flow [2025-03-08 17:40:57,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 17:40:57,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-08 17:40:57,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 159 transitions. [2025-03-08 17:40:57,914 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2025-03-08 17:40:57,914 INFO L175 Difference]: Start difference. First operand has 240 places, 384 transitions, 7675 flow. Second operand 18 states and 159 transitions. [2025-03-08 17:40:57,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 476 transitions, 9772 flow [2025-03-08 17:40:58,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 476 transitions, 9619 flow, removed 18 selfloop flow, removed 9 redundant places. [2025-03-08 17:40:58,057 INFO L231 Difference]: Finished difference. Result has 255 places, 412 transitions, 8651 flow [2025-03-08 17:40:58,057 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7505, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8651, PETRI_PLACES=255, PETRI_TRANSITIONS=412} [2025-03-08 17:40:58,058 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 234 predicate places. [2025-03-08 17:40:58,058 INFO L471 AbstractCegarLoop]: Abstraction has has 255 places, 412 transitions, 8651 flow [2025-03-08 17:40:58,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 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) [2025-03-08 17:40:58,058 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:40:58,058 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:40:58,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-08 17:40:58,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:58,258 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:40:58,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:40:58,259 INFO L85 PathProgramCache]: Analyzing trace with hash 2057423634, now seen corresponding path program 10 times [2025-03-08 17:40:58,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:40:58,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808716684] [2025-03-08 17:40:58,259 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:40:58,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:40:58,262 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:40:58,266 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:40:58,266 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:40:58,266 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:58,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:40:58,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808716684] [2025-03-08 17:40:58,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808716684] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:40:58,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481036353] [2025-03-08 17:40:58,366 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:40:58,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:40:58,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:40:58,368 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:40:58,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 17:40:58,404 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:40:58,427 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:40:58,427 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:40:58,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:40:58,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 17:40:58,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:40:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:58,457 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:40:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:40:58,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481036353] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:40:58,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:40:58,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 14 [2025-03-08 17:40:58,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457411138] [2025-03-08 17:40:58,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:40:58,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 17:40:58,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:40:58,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 17:40:58,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:40:58,617 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:40:58,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 412 transitions, 8651 flow. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:40:58,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:40:58,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:40:58,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:41:03,041 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 [] [2025-03-08 17:41:03,298 INFO L124 PetriNetUnfolderBase]: 1319/2529 cut-off events. [2025-03-08 17:41:03,298 INFO L125 PetriNetUnfolderBase]: For 45658/45658 co-relation queries the response was YES. [2025-03-08 17:41:03,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21631 conditions, 2529 events. 1319/2529 cut-off events. For 45658/45658 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16083 event pairs, 238 based on Foata normal form. 2/2530 useless extension candidates. Maximal degree in co-relation 21540. Up to 1214 conditions per place. [2025-03-08 17:41:03,318 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 371 selfloop transitions, 125 changer transitions 2/499 dead transitions. [2025-03-08 17:41:03,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 499 transitions, 11096 flow [2025-03-08 17:41:03,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-08 17:41:03,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-08 17:41:03,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 110 transitions. [2025-03-08 17:41:03,319 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2025-03-08 17:41:03,319 INFO L175 Difference]: Start difference. First operand has 255 places, 412 transitions, 8651 flow. Second operand 14 states and 110 transitions. [2025-03-08 17:41:03,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 499 transitions, 11096 flow [2025-03-08 17:41:03,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 499 transitions, 10913 flow, removed 40 selfloop flow, removed 4 redundant places. [2025-03-08 17:41:03,498 INFO L231 Difference]: Finished difference. Result has 267 places, 427 transitions, 9315 flow [2025-03-08 17:41:03,498 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=8430, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9315, PETRI_PLACES=267, PETRI_TRANSITIONS=427} [2025-03-08 17:41:03,499 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 246 predicate places. [2025-03-08 17:41:03,499 INFO L471 AbstractCegarLoop]: Abstraction has has 267 places, 427 transitions, 9315 flow [2025-03-08 17:41:03,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:41:03,499 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:41:03,499 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:41:03,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-08 17:41:03,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-03-08 17:41:03,699 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:41:03,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:41:03,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1843087658, now seen corresponding path program 11 times [2025-03-08 17:41:03,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:41:03,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787351046] [2025-03-08 17:41:03,700 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:41:03,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:41:03,704 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:41:03,710 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:41:03,711 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:41:03,711 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:03,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:41:03,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787351046] [2025-03-08 17:41:03,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787351046] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:41:03,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481501291] [2025-03-08 17:41:03,775 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:41:03,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:03,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:41:03,776 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:41:03,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-08 17:41:03,814 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-08 17:41:03,844 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:41:03,844 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:41:03,844 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:03,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 17:41:03,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:41:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:03,874 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:41:03,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:03,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481501291] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:41:03,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:41:03,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-03-08 17:41:03,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676283725] [2025-03-08 17:41:03,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:41:03,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 17:41:03,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:41:03,910 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 17:41:03,910 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-03-08 17:41:03,910 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:41:03,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 427 transitions, 9315 flow. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 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) [2025-03-08 17:41:03,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:41:03,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:41:03,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:41:04,382 INFO L124 PetriNetUnfolderBase]: 1310/2502 cut-off events. [2025-03-08 17:41:04,383 INFO L125 PetriNetUnfolderBase]: For 51283/51283 co-relation queries the response was YES. [2025-03-08 17:41:04,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22059 conditions, 2502 events. 1310/2502 cut-off events. For 51283/51283 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15813 event pairs, 279 based on Foata normal form. 4/2505 useless extension candidates. Maximal degree in co-relation 21965. Up to 1270 conditions per place. [2025-03-08 17:41:04,401 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 362 selfloop transitions, 91 changer transitions 9/463 dead transitions. [2025-03-08 17:41:04,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 463 transitions, 10747 flow [2025-03-08 17:41:04,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 17:41:04,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-08 17:41:04,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 67 transitions. [2025-03-08 17:41:04,402 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37222222222222223 [2025-03-08 17:41:04,402 INFO L175 Difference]: Start difference. First operand has 267 places, 427 transitions, 9315 flow. Second operand 9 states and 67 transitions. [2025-03-08 17:41:04,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 463 transitions, 10747 flow [2025-03-08 17:41:04,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 463 transitions, 10624 flow, removed 9 selfloop flow, removed 9 redundant places. [2025-03-08 17:41:04,608 INFO L231 Difference]: Finished difference. Result has 264 places, 420 transitions, 9191 flow [2025-03-08 17:41:04,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=9158, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9191, PETRI_PLACES=264, PETRI_TRANSITIONS=420} [2025-03-08 17:41:04,608 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 243 predicate places. [2025-03-08 17:41:04,608 INFO L471 AbstractCegarLoop]: Abstraction has has 264 places, 420 transitions, 9191 flow [2025-03-08 17:41:04,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 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) [2025-03-08 17:41:04,608 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:41:04,608 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:41:04,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-08 17:41:04,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-03-08 17:41:04,809 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:41:04,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:41:04,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1281252329, now seen corresponding path program 3 times [2025-03-08 17:41:04,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:41:04,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083343410] [2025-03-08 17:41:04,810 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:41:04,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:41:04,814 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:41:04,831 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:41:04,832 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:41:04,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:41:05,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:41:05,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083343410] [2025-03-08 17:41:05,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083343410] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:41:05,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815413730] [2025-03-08 17:41:05,490 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:41:05,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:05,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:41:05,492 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:41:05,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-08 17:41:05,529 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:41:05,542 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:41:05,542 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:41:05,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:05,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-08 17:41:05,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:41:05,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:41:05,773 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2025-03-08 17:41:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:05,777 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:41:06,036 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-03-08 17:41:06,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-03-08 17:41:06,101 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2025-03-08 17:41:06,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2025-03-08 17:41:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:06,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815413730] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:41:06,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:41:06,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 26 [2025-03-08 17:41:06,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045132953] [2025-03-08 17:41:06,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:41:06,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 17:41:06,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:41:06,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 17:41:06,149 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2025-03-08 17:41:06,149 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:41:06,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 420 transitions, 9191 flow. Second operand has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:41:06,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:41:06,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:41:06,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:41:07,443 INFO L124 PetriNetUnfolderBase]: 1458/2768 cut-off events. [2025-03-08 17:41:07,444 INFO L125 PetriNetUnfolderBase]: For 59629/59629 co-relation queries the response was YES. [2025-03-08 17:41:07,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24957 conditions, 2768 events. 1458/2768 cut-off events. For 59629/59629 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17639 event pairs, 89 based on Foata normal form. 2/2768 useless extension candidates. Maximal degree in co-relation 24841. Up to 2284 conditions per place. [2025-03-08 17:41:07,467 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 431 selfloop transitions, 128 changer transitions 5/565 dead transitions. [2025-03-08 17:41:07,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 565 transitions, 12468 flow [2025-03-08 17:41:07,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-08 17:41:07,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-08 17:41:07,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 230 transitions. [2025-03-08 17:41:07,468 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2025-03-08 17:41:07,468 INFO L175 Difference]: Start difference. First operand has 264 places, 420 transitions, 9191 flow. Second operand 27 states and 230 transitions. [2025-03-08 17:41:07,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 565 transitions, 12468 flow [2025-03-08 17:41:07,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 565 transitions, 12179 flow, removed 15 selfloop flow, removed 7 redundant places. [2025-03-08 17:41:07,712 INFO L231 Difference]: Finished difference. Result has 281 places, 485 transitions, 10663 flow [2025-03-08 17:41:07,712 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=8985, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=10663, PETRI_PLACES=281, PETRI_TRANSITIONS=485} [2025-03-08 17:41:07,713 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 260 predicate places. [2025-03-08 17:41:07,713 INFO L471 AbstractCegarLoop]: Abstraction has has 281 places, 485 transitions, 10663 flow [2025-03-08 17:41:07,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:41:07,713 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:41:07,713 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:41:07,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-08 17:41:07,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-08 17:41:07,913 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:41:07,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:41:07,914 INFO L85 PathProgramCache]: Analyzing trace with hash 120616783, now seen corresponding path program 4 times [2025-03-08 17:41:07,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:41:07,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332888708] [2025-03-08 17:41:07,914 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:41:07,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:41:07,918 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:41:07,932 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:41:07,932 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:41:07,932 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:41:08,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:41:08,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332888708] [2025-03-08 17:41:08,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332888708] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:41:08,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009860038] [2025-03-08 17:41:08,486 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:41:08,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:08,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:41:08,488 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:41:08,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-08 17:41:08,526 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:41:08,538 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:41:08,538 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:41:08,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:08,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-08 17:41:08,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:41:08,707 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:41:08,707 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2025-03-08 17:41:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:08,711 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:41:08,958 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-03-08 17:41:08,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-03-08 17:41:09,009 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2025-03-08 17:41:09,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2025-03-08 17:41:09,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:09,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009860038] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:41:09,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:41:09,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 25 [2025-03-08 17:41:09,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825693823] [2025-03-08 17:41:09,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:41:09,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-08 17:41:09,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:41:09,046 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-08 17:41:09,047 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2025-03-08 17:41:09,047 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:41:09,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 485 transitions, 10663 flow. Second operand has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 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) [2025-03-08 17:41:09,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:41:09,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:41:09,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:41:10,323 INFO L124 PetriNetUnfolderBase]: 1539/2915 cut-off events. [2025-03-08 17:41:10,324 INFO L125 PetriNetUnfolderBase]: For 61353/61353 co-relation queries the response was YES. [2025-03-08 17:41:10,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26924 conditions, 2915 events. 1539/2915 cut-off events. For 61353/61353 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 18859 event pairs, 78 based on Foata normal form. 6/2920 useless extension candidates. Maximal degree in co-relation 26761. Up to 2301 conditions per place. [2025-03-08 17:41:10,349 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 423 selfloop transitions, 148 changer transitions 6/578 dead transitions. [2025-03-08 17:41:10,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 578 transitions, 13081 flow [2025-03-08 17:41:10,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 17:41:10,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-08 17:41:10,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 187 transitions. [2025-03-08 17:41:10,350 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2025-03-08 17:41:10,350 INFO L175 Difference]: Start difference. First operand has 281 places, 485 transitions, 10663 flow. Second operand 21 states and 187 transitions. [2025-03-08 17:41:10,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 578 transitions, 13081 flow [2025-03-08 17:41:10,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 578 transitions, 12721 flow, removed 175 selfloop flow, removed 5 redundant places. [2025-03-08 17:41:10,617 INFO L231 Difference]: Finished difference. Result has 302 places, 516 transitions, 11560 flow [2025-03-08 17:41:10,617 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=10391, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11560, PETRI_PLACES=302, PETRI_TRANSITIONS=516} [2025-03-08 17:41:10,617 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 281 predicate places. [2025-03-08 17:41:10,617 INFO L471 AbstractCegarLoop]: Abstraction has has 302 places, 516 transitions, 11560 flow [2025-03-08 17:41:10,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 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) [2025-03-08 17:41:10,618 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:41:10,618 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:41:10,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-08 17:41:10,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:10,819 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:41:10,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:41:10,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1054877805, now seen corresponding path program 5 times [2025-03-08 17:41:10,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:41:10,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528875522] [2025-03-08 17:41:10,820 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:41:10,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:41:10,824 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:41:10,837 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:41:10,838 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:41:10,838 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:41:11,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:41:11,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528875522] [2025-03-08 17:41:11,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528875522] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:41:11,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138527438] [2025-03-08 17:41:11,604 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:41:11,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:11,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:41:11,606 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:41:11,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-08 17:41:11,645 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:41:11,659 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:41:11,659 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:41:11,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:11,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-08 17:41:11,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:41:11,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:41:11,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 75 [2025-03-08 17:41:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:41:11,964 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:41:12,293 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:41:12,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 152 [2025-03-08 17:41:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:12,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138527438] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:41:12,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:41:12,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 27 [2025-03-08 17:41:12,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67342513] [2025-03-08 17:41:12,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:41:12,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 17:41:12,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:41:12,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 17:41:12,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2025-03-08 17:41:12,491 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:41:12,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 516 transitions, 11560 flow. Second operand has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:41:12,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:41:12,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:41:12,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:41:13,763 INFO L124 PetriNetUnfolderBase]: 1529/2899 cut-off events. [2025-03-08 17:41:13,763 INFO L125 PetriNetUnfolderBase]: For 60482/60482 co-relation queries the response was YES. [2025-03-08 17:41:13,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26837 conditions, 2899 events. 1529/2899 cut-off events. For 60482/60482 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 18694 event pairs, 88 based on Foata normal form. 2/2901 useless extension candidates. Maximal degree in co-relation 26669. Up to 2389 conditions per place. [2025-03-08 17:41:13,783 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 440 selfloop transitions, 115 changer transitions 8/564 dead transitions. [2025-03-08 17:41:13,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 564 transitions, 12971 flow [2025-03-08 17:41:13,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 17:41:13,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-08 17:41:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 159 transitions. [2025-03-08 17:41:13,784 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41842105263157897 [2025-03-08 17:41:13,784 INFO L175 Difference]: Start difference. First operand has 302 places, 516 transitions, 11560 flow. Second operand 19 states and 159 transitions. [2025-03-08 17:41:13,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 564 transitions, 12971 flow [2025-03-08 17:41:14,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 564 transitions, 12771 flow, removed 56 selfloop flow, removed 11 redundant places. [2025-03-08 17:41:14,040 INFO L231 Difference]: Finished difference. Result has 313 places, 518 transitions, 11634 flow [2025-03-08 17:41:14,040 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=11362, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=11634, PETRI_PLACES=313, PETRI_TRANSITIONS=518} [2025-03-08 17:41:14,040 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 292 predicate places. [2025-03-08 17:41:14,040 INFO L471 AbstractCegarLoop]: Abstraction has has 313 places, 518 transitions, 11634 flow [2025-03-08 17:41:14,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:41:14,040 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:41:14,040 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:41:14,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-08 17:41:14,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-08 17:41:14,241 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:41:14,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:41:14,241 INFO L85 PathProgramCache]: Analyzing trace with hash -370465540, now seen corresponding path program 6 times [2025-03-08 17:41:14,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:41:14,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390052465] [2025-03-08 17:41:14,242 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:41:14,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:41:14,245 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:41:14,250 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:41:14,250 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:41:14,250 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:14,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:41:14,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390052465] [2025-03-08 17:41:14,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390052465] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:41:14,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453787483] [2025-03-08 17:41:14,355 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:41:14,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:14,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:41:14,357 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:41:14,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-08 17:41:14,403 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:41:14,433 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:41:14,433 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:41:14,433 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:14,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 17:41:14,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:41:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 17:41:14,452 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:41:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 17:41:14,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453787483] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:41:14,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:41:14,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2025-03-08 17:41:14,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009514664] [2025-03-08 17:41:14,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:41:14,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 17:41:14,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:41:14,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 17:41:14,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2025-03-08 17:41:14,513 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:41:14,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 518 transitions, 11634 flow. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 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) [2025-03-08 17:41:14,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:41:14,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:41:14,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:41:15,196 INFO L124 PetriNetUnfolderBase]: 1500/2838 cut-off events. [2025-03-08 17:41:15,197 INFO L125 PetriNetUnfolderBase]: For 61533/61533 co-relation queries the response was YES. [2025-03-08 17:41:15,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26322 conditions, 2838 events. 1500/2838 cut-off events. For 61533/61533 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18193 event pairs, 251 based on Foata normal form. 12/2850 useless extension candidates. Maximal degree in co-relation 26150. Up to 1252 conditions per place. [2025-03-08 17:41:15,218 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 361 selfloop transitions, 167 changer transitions 10/539 dead transitions. [2025-03-08 17:41:15,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 539 transitions, 12731 flow [2025-03-08 17:41:15,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 17:41:15,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-08 17:41:15,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 81 transitions. [2025-03-08 17:41:15,218 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2025-03-08 17:41:15,219 INFO L175 Difference]: Start difference. First operand has 313 places, 518 transitions, 11634 flow. Second operand 9 states and 81 transitions. [2025-03-08 17:41:15,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 539 transitions, 12731 flow [2025-03-08 17:41:15,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 539 transitions, 12545 flow, removed 11 selfloop flow, removed 16 redundant places. [2025-03-08 17:41:15,470 INFO L231 Difference]: Finished difference. Result has 302 places, 505 transitions, 11392 flow [2025-03-08 17:41:15,470 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=11210, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11392, PETRI_PLACES=302, PETRI_TRANSITIONS=505} [2025-03-08 17:41:15,472 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 281 predicate places. [2025-03-08 17:41:15,472 INFO L471 AbstractCegarLoop]: Abstraction has has 302 places, 505 transitions, 11392 flow [2025-03-08 17:41:15,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 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) [2025-03-08 17:41:15,473 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:41:15,473 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:41:15,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-08 17:41:15,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-08 17:41:15,673 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:41:15,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:41:15,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1788282029, now seen corresponding path program 7 times [2025-03-08 17:41:15,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:41:15,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054863316] [2025-03-08 17:41:15,674 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:41:15,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:41:15,677 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 17:41:15,690 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:41:15,690 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:41:15,690 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:41:16,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:41:16,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054863316] [2025-03-08 17:41:16,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054863316] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:41:16,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229519517] [2025-03-08 17:41:16,284 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:41:16,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:16,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:41:16,286 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:41:16,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-08 17:41:16,331 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 17:41:16,344 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:41:16,344 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:41:16,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:16,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-08 17:41:16,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:41:16,516 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:41:16,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 64 [2025-03-08 17:41:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:41:16,601 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:41:16,828 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-03-08 17:41:16,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-03-08 17:41:16,930 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2025-03-08 17:41:16,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2025-03-08 17:41:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:16,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229519517] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:41:16,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:41:16,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 26 [2025-03-08 17:41:16,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277143316] [2025-03-08 17:41:16,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:41:16,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-08 17:41:16,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:41:16,964 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-08 17:41:16,964 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2025-03-08 17:41:16,964 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:41:16,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 505 transitions, 11392 flow. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 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) [2025-03-08 17:41:16,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:41:16,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:41:16,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:41:18,260 INFO L124 PetriNetUnfolderBase]: 1549/2896 cut-off events. [2025-03-08 17:41:18,261 INFO L125 PetriNetUnfolderBase]: For 62232/62232 co-relation queries the response was YES. [2025-03-08 17:41:18,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27360 conditions, 2896 events. 1549/2896 cut-off events. For 62232/62232 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 18391 event pairs, 107 based on Foata normal form. 2/2898 useless extension candidates. Maximal degree in co-relation 27184. Up to 2600 conditions per place. [2025-03-08 17:41:18,285 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 485 selfloop transitions, 100 changer transitions 6/592 dead transitions. [2025-03-08 17:41:18,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 592 transitions, 13872 flow [2025-03-08 17:41:18,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-08 17:41:18,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-08 17:41:18,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 198 transitions. [2025-03-08 17:41:18,286 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38076923076923075 [2025-03-08 17:41:18,286 INFO L175 Difference]: Start difference. First operand has 302 places, 505 transitions, 11392 flow. Second operand 26 states and 198 transitions. [2025-03-08 17:41:18,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 592 transitions, 13872 flow [2025-03-08 17:41:18,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 592 transitions, 13001 flow, removed 18 selfloop flow, removed 12 redundant places. [2025-03-08 17:41:18,589 INFO L231 Difference]: Finished difference. Result has 318 places, 549 transitions, 11896 flow [2025-03-08 17:41:18,589 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=10643, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=11896, PETRI_PLACES=318, PETRI_TRANSITIONS=549} [2025-03-08 17:41:18,590 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 297 predicate places. [2025-03-08 17:41:18,590 INFO L471 AbstractCegarLoop]: Abstraction has has 318 places, 549 transitions, 11896 flow [2025-03-08 17:41:18,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 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) [2025-03-08 17:41:18,590 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:41:18,590 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:41:18,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-08 17:41:18,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:18,791 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:41:18,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:41:18,792 INFO L85 PathProgramCache]: Analyzing trace with hash -12583921, now seen corresponding path program 8 times [2025-03-08 17:41:18,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:41:18,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535127362] [2025-03-08 17:41:18,792 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:41:18,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:41:18,797 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:41:18,808 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:41:18,808 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:41:18,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:41:19,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:41:19,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535127362] [2025-03-08 17:41:19,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535127362] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:41:19,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814627562] [2025-03-08 17:41:19,545 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:41:19,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:19,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:41:19,547 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:41:19,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-08 17:41:19,588 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:41:19,601 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:41:19,601 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:41:19,601 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:19,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-08 17:41:19,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:41:19,822 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:41:19,822 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2025-03-08 17:41:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:41:19,826 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:41:20,071 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-03-08 17:41:20,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-03-08 17:41:20,116 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2025-03-08 17:41:20,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2025-03-08 17:41:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:20,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814627562] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:41:20,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:41:20,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2025-03-08 17:41:20,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646320085] [2025-03-08 17:41:20,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:41:20,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 17:41:20,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:41:20,153 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 17:41:20,154 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2025-03-08 17:41:20,154 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:41:20,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 549 transitions, 11896 flow. Second operand has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:41:20,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:41:20,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:41:20,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:41:21,787 INFO L124 PetriNetUnfolderBase]: 1600/2976 cut-off events. [2025-03-08 17:41:21,787 INFO L125 PetriNetUnfolderBase]: For 59680/59680 co-relation queries the response was YES. [2025-03-08 17:41:21,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27628 conditions, 2976 events. 1600/2976 cut-off events. For 59680/59680 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 18934 event pairs, 98 based on Foata normal form. 3/2979 useless extension candidates. Maximal degree in co-relation 27466. Up to 2715 conditions per place. [2025-03-08 17:41:21,842 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 525 selfloop transitions, 89 changer transitions 9/624 dead transitions. [2025-03-08 17:41:21,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 624 transitions, 13941 flow [2025-03-08 17:41:21,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-08 17:41:21,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-08 17:41:21,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 213 transitions. [2025-03-08 17:41:21,843 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2025-03-08 17:41:21,843 INFO L175 Difference]: Start difference. First operand has 318 places, 549 transitions, 11896 flow. Second operand 27 states and 213 transitions. [2025-03-08 17:41:21,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 624 transitions, 13941 flow [2025-03-08 17:41:22,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 624 transitions, 13592 flow, removed 126 selfloop flow, removed 13 redundant places. [2025-03-08 17:41:22,100 INFO L231 Difference]: Finished difference. Result has 338 places, 568 transitions, 12308 flow [2025-03-08 17:41:22,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=11599, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=12308, PETRI_PLACES=338, PETRI_TRANSITIONS=568} [2025-03-08 17:41:22,101 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 317 predicate places. [2025-03-08 17:41:22,102 INFO L471 AbstractCegarLoop]: Abstraction has has 338 places, 568 transitions, 12308 flow [2025-03-08 17:41:22,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:41:22,102 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:41:22,102 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:41:22,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-03-08 17:41:22,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:22,303 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:41:22,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:41:22,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1722719523, now seen corresponding path program 9 times [2025-03-08 17:41:22,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:41:22,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538214198] [2025-03-08 17:41:22,303 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:41:22,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:41:22,308 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:41:22,316 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:41:22,316 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:41:22,316 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:41:22,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:41:22,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538214198] [2025-03-08 17:41:22,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538214198] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:41:22,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195071519] [2025-03-08 17:41:22,907 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:41:22,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:22,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:41:22,909 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:41:22,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-08 17:41:22,950 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:41:22,971 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:41:22,971 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:41:22,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:41:22,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-08 17:41:22,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:41:23,176 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:41:23,177 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2025-03-08 17:41:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:41:23,180 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:41:23,440 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-03-08 17:41:23,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-03-08 17:41:23,488 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2025-03-08 17:41:23,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2025-03-08 17:41:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:41:23,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195071519] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:41:23,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:41:23,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2025-03-08 17:41:23,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746444527] [2025-03-08 17:41:23,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:41:23,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 17:41:23,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:41:23,521 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 17:41:23,521 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2025-03-08 17:41:23,521 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-03-08 17:41:23,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 568 transitions, 12308 flow. Second operand has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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) [2025-03-08 17:41:23,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:41:23,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-03-08 17:41:23,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:41:25,091 INFO L124 PetriNetUnfolderBase]: 1640/3038 cut-off events. [2025-03-08 17:41:25,091 INFO L125 PetriNetUnfolderBase]: For 64439/64439 co-relation queries the response was YES. [2025-03-08 17:41:25,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28634 conditions, 3038 events. 1640/3038 cut-off events. For 64439/64439 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 19347 event pairs, 99 based on Foata normal form. 3/3041 useless extension candidates. Maximal degree in co-relation 28464. Up to 2762 conditions per place. [2025-03-08 17:41:25,116 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 543 selfloop transitions, 90 changer transitions 9/643 dead transitions. [2025-03-08 17:41:25,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 643 transitions, 14362 flow [2025-03-08 17:41:25,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-08 17:41:25,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-08 17:41:25,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 216 transitions. [2025-03-08 17:41:25,118 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2025-03-08 17:41:25,118 INFO L175 Difference]: Start difference. First operand has 338 places, 568 transitions, 12308 flow. Second operand 27 states and 216 transitions. [2025-03-08 17:41:25,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 643 transitions, 14362 flow [2025-03-08 17:41:25,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 643 transitions, 14092 flow, removed 90 selfloop flow, removed 16 redundant places. [2025-03-08 17:41:25,416 INFO L231 Difference]: Finished difference. Result has 353 places, 584 transitions, 12735 flow [2025-03-08 17:41:25,416 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=12038, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=12735, PETRI_PLACES=353, PETRI_TRANSITIONS=584} [2025-03-08 17:41:25,417 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 332 predicate places. [2025-03-08 17:41:25,417 INFO L471 AbstractCegarLoop]: Abstraction has has 353 places, 584 transitions, 12735 flow [2025-03-08 17:41:25,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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) [2025-03-08 17:41:25,417 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:41:25,417 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:41:25,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-03-08 17:41:25,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:41:25,618 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:41:25,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:41:25,618 INFO L85 PathProgramCache]: Analyzing trace with hash 70532969, now seen corresponding path program 10 times [2025-03-08 17:41:25,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:41:25,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713783249] [2025-03-08 17:41:25,618 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:41:25,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:41:25,622 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-03-08 17:41:25,635 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:41:25,635 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:41:25,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat