./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/array-eq-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/array-eq-trans.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 e7f1528a4c77969c5bff279724a3ed43475460be047e2e4b141f1353c3ea9cfe --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 06:34:59,739 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:34:59,797 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:34:59,802 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:34:59,802 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:34:59,820 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:34:59,821 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:34:59,821 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:34:59,822 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:34:59,822 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:34:59,822 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:34:59,822 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:34:59,822 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:34:59,823 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:34:59,823 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:34:59,823 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:34:59,823 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:34:59,823 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:34:59,823 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:34:59,823 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:34:59,824 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:34:59,824 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:34:59,824 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:34:59,824 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:34:59,824 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:34:59,824 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:34:59,824 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:34:59,824 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:34:59,824 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:34:59,824 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:34:59,824 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:34:59,824 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:34:59,824 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:34:59,824 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:34:59,824 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:34:59,825 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:34:59,825 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:34:59,825 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:34:59,825 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:34:59,825 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:34:59,825 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:34:59,825 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:34:59,825 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:34:59,825 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 -> e7f1528a4c77969c5bff279724a3ed43475460be047e2e4b141f1353c3ea9cfe [2025-03-17 06:35:00,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:35:00,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:35:00,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:35:00,201 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:35:00,202 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:35:00,204 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2025-03-17 06:35:01,552 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a97bbca62/e69a32ef30f347079249df1f010ac99f/FLAG88f4889a8 [2025-03-17 06:35:01,812 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:35:01,813 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2025-03-17 06:35:01,823 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a97bbca62/e69a32ef30f347079249df1f010ac99f/FLAG88f4889a8 [2025-03-17 06:35:01,838 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a97bbca62/e69a32ef30f347079249df1f010ac99f [2025-03-17 06:35:01,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:35:01,843 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:35:01,844 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:35:01,844 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:35:01,848 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:35:01,848 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:35:01" (1/1) ... [2025-03-17 06:35:01,851 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bd3874e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:01, skipping insertion in model container [2025-03-17 06:35:01,851 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:35:01" (1/1) ... [2025-03-17 06:35:01,865 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:35:02,012 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/array-eq-trans.wvr.c[2776,2789] [2025-03-17 06:35:02,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:35:02,034 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:35:02,062 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/array-eq-trans.wvr.c[2776,2789] [2025-03-17 06:35:02,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:35:02,085 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:35:02,086 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:02 WrapperNode [2025-03-17 06:35:02,087 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:35:02,088 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:35:02,088 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:35:02,089 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:35:02,095 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:02" (1/1) ... [2025-03-17 06:35:02,104 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:02" (1/1) ... [2025-03-17 06:35:02,126 INFO L138 Inliner]: procedures = 23, calls = 31, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 185 [2025-03-17 06:35:02,127 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:35:02,127 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:35:02,128 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:35:02,128 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:35:02,134 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:02" (1/1) ... [2025-03-17 06:35:02,135 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:02" (1/1) ... [2025-03-17 06:35:02,137 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:02" (1/1) ... [2025-03-17 06:35:02,157 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-03-17 06:35:02,160 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:02" (1/1) ... [2025-03-17 06:35:02,161 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:02" (1/1) ... [2025-03-17 06:35:02,169 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:02" (1/1) ... [2025-03-17 06:35:02,174 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:02" (1/1) ... [2025-03-17 06:35:02,176 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:02" (1/1) ... [2025-03-17 06:35:02,177 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:02" (1/1) ... [2025-03-17 06:35:02,179 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:35:02,180 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:35:02,180 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:35:02,180 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:35:02,185 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:02" (1/1) ... [2025-03-17 06:35:02,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:35:02,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:35:02,220 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 06:35:02,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 06:35:02,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:35:02,242 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 06:35:02,242 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 06:35:02,242 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 06:35:02,242 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 06:35:02,242 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 06:35:02,242 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 06:35:02,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:35:02,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 06:35:02,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 06:35:02,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 06:35:02,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 06:35:02,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:35:02,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:35:02,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 06:35:02,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 06:35:02,244 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 06:35:02,340 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:35:02,342 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:35:02,801 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:35:02,801 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:35:03,100 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:35:03,100 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:35:03,101 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:35:03 BoogieIcfgContainer [2025-03-17 06:35:03,101 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:35:03,103 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:35:03,103 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:35:03,108 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:35:03,108 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:35:01" (1/3) ... [2025-03-17 06:35:03,109 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31415d8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:35:03, skipping insertion in model container [2025-03-17 06:35:03,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:35:02" (2/3) ... [2025-03-17 06:35:03,109 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31415d8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:35:03, skipping insertion in model container [2025-03-17 06:35:03,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:35:03" (3/3) ... [2025-03-17 06:35:03,110 INFO L128 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2025-03-17 06:35:03,123 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:35:03,125 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG array-eq-trans.wvr.c that has 4 procedures, 32 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-03-17 06:35:03,125 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:35:03,178 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-17 06:35:03,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 101 flow [2025-03-17 06:35:03,244 INFO L124 PetriNetUnfolderBase]: 9/37 cut-off events. [2025-03-17 06:35:03,248 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 06:35:03,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 37 events. 9/37 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2025-03-17 06:35:03,255 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 40 transitions, 101 flow [2025-03-17 06:35:03,258 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 36 transitions, 90 flow [2025-03-17 06:35:03,265 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:35:03,279 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;@5c973143, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:35:03,282 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-17 06:35:03,304 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:35:03,304 INFO L124 PetriNetUnfolderBase]: 9/35 cut-off events. [2025-03-17 06:35:03,305 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 06:35:03,305 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:03,305 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:03,307 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:03,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:03,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1310397027, now seen corresponding path program 1 times [2025-03-17 06:35:03,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:03,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125408356] [2025-03-17 06:35:03,322 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:03,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:03,420 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 06:35:03,502 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:35:03,503 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:03,503 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:35:04,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:04,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125408356] [2025-03-17 06:35:04,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125408356] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:35:04,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:35:04,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:35:04,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108945168] [2025-03-17 06:35:04,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:04,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:35:04,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:04,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:35:04,129 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 06:35:04,141 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2025-03-17 06:35:04,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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) [2025-03-17 06:35:04,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:04,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2025-03-17 06:35:04,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:04,482 INFO L124 PetriNetUnfolderBase]: 1327/1881 cut-off events. [2025-03-17 06:35:04,482 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2025-03-17 06:35:04,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3763 conditions, 1881 events. 1327/1881 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 8624 event pairs, 745 based on Foata normal form. 42/1605 useless extension candidates. Maximal degree in co-relation 2273. Up to 1164 conditions per place. [2025-03-17 06:35:04,505 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 28 selfloop transitions, 2 changer transitions 23/60 dead transitions. [2025-03-17 06:35:04,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 60 transitions, 262 flow [2025-03-17 06:35:04,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 06:35:04,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 06:35:04,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2025-03-17 06:35:04,516 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59375 [2025-03-17 06:35:04,517 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 90 flow. Second operand 4 states and 95 transitions. [2025-03-17 06:35:04,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 60 transitions, 262 flow [2025-03-17 06:35:04,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 60 transitions, 238 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 06:35:04,529 INFO L231 Difference]: Finished difference. Result has 36 places, 37 transitions, 94 flow [2025-03-17 06:35:04,532 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=36, PETRI_TRANSITIONS=37} [2025-03-17 06:35:04,536 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2025-03-17 06:35:04,536 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 37 transitions, 94 flow [2025-03-17 06:35:04,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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) [2025-03-17 06:35:04,536 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:04,536 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:04,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:35:04,537 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:04,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:04,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1369785782, now seen corresponding path program 1 times [2025-03-17 06:35:04,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:04,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551498549] [2025-03-17 06:35:04,537 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:04,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:04,558 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 06:35:04,576 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:35:04,578 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:04,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:35:04,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:04,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551498549] [2025-03-17 06:35:04,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551498549] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:04,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62823847] [2025-03-17 06:35:04,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:04,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:35:04,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:35:04,953 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:35:04,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 06:35:05,030 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 06:35:05,063 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 06:35:05,063 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:05,064 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:05,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 06:35:05,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:35:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:35:05,291 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:35:05,383 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:35:05,384 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 59 treesize of output 55 [2025-03-17 06:35:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:35:05,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62823847] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:05,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:35:05,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 11 [2025-03-17 06:35:05,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015752645] [2025-03-17 06:35:05,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:05,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:35:05,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:05,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:35:05,546 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2025-03-17 06:35:05,559 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2025-03-17 06:35:05,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 37 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 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) [2025-03-17 06:35:05,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:05,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2025-03-17 06:35:05,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:05,915 INFO L124 PetriNetUnfolderBase]: 1720/2381 cut-off events. [2025-03-17 06:35:05,915 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2025-03-17 06:35:05,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4930 conditions, 2381 events. 1720/2381 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 11076 event pairs, 439 based on Foata normal form. 1/1925 useless extension candidates. Maximal degree in co-relation 4918. Up to 940 conditions per place. [2025-03-17 06:35:05,936 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 62 selfloop transitions, 5 changer transitions 1/74 dead transitions. [2025-03-17 06:35:05,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 74 transitions, 320 flow [2025-03-17 06:35:05,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:35:05,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:35:05,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2025-03-17 06:35:05,938 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.57 [2025-03-17 06:35:05,938 INFO L175 Difference]: Start difference. First operand has 36 places, 37 transitions, 94 flow. Second operand 5 states and 114 transitions. [2025-03-17 06:35:05,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 74 transitions, 320 flow [2025-03-17 06:35:05,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 74 transitions, 306 flow, removed 6 selfloop flow, removed 2 redundant places. [2025-03-17 06:35:05,943 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 114 flow [2025-03-17 06:35:05,943 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2025-03-17 06:35:05,944 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2025-03-17 06:35:05,944 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 114 flow [2025-03-17 06:35:05,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 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) [2025-03-17 06:35:05,944 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:05,945 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:05,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 06:35:06,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:35:06,149 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:06,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:06,150 INFO L85 PathProgramCache]: Analyzing trace with hash 345782972, now seen corresponding path program 1 times [2025-03-17 06:35:06,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:06,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506321187] [2025-03-17 06:35:06,150 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:06,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:06,165 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 06:35:06,177 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 06:35:06,177 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:06,177 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:35:06,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:06,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506321187] [2025-03-17 06:35:06,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506321187] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:35:06,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:35:06,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:35:06,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640941705] [2025-03-17 06:35:06,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:06,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:35:06,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:06,329 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:35:06,329 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:35:06,337 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2025-03-17 06:35:06,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 114 flow. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 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) [2025-03-17 06:35:06,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:06,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2025-03-17 06:35:06,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:06,659 INFO L124 PetriNetUnfolderBase]: 2253/3224 cut-off events. [2025-03-17 06:35:06,660 INFO L125 PetriNetUnfolderBase]: For 361/369 co-relation queries the response was YES. [2025-03-17 06:35:06,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6787 conditions, 3224 events. 2253/3224 cut-off events. For 361/369 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 16703 event pairs, 771 based on Foata normal form. 53/2898 useless extension candidates. Maximal degree in co-relation 6767. Up to 1406 conditions per place. [2025-03-17 06:35:06,680 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 48 selfloop transitions, 4 changer transitions 21/81 dead transitions. [2025-03-17 06:35:06,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 81 transitions, 361 flow [2025-03-17 06:35:06,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:35:06,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:35:06,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2025-03-17 06:35:06,683 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.615 [2025-03-17 06:35:06,683 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 114 flow. Second operand 5 states and 123 transitions. [2025-03-17 06:35:06,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 81 transitions, 361 flow [2025-03-17 06:35:06,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 81 transitions, 359 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:35:06,687 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 142 flow [2025-03-17 06:35:06,687 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2025-03-17 06:35:06,687 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2025-03-17 06:35:06,688 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 142 flow [2025-03-17 06:35:06,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 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) [2025-03-17 06:35:06,688 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:06,688 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:06,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 06:35:06,688 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:06,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:06,689 INFO L85 PathProgramCache]: Analyzing trace with hash 2035206278, now seen corresponding path program 1 times [2025-03-17 06:35:06,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:06,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685290719] [2025-03-17 06:35:06,690 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:06,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:06,701 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-17 06:35:06,713 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:35:06,713 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:06,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:06,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:35:06,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:06,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685290719] [2025-03-17 06:35:06,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685290719] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:06,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655234827] [2025-03-17 06:35:06,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:06,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:35:06,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:35:06,967 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:35:06,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 06:35:07,032 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-17 06:35:07,057 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 06:35:07,057 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:07,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:07,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 06:35:07,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:35:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:35:07,179 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:35:07,222 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:35:07,222 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 59 treesize of output 55 [2025-03-17 06:35:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:35:07,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655234827] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:07,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:35:07,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 13 [2025-03-17 06:35:07,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731826657] [2025-03-17 06:35:07,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:07,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:35:07,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:07,380 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:35:07,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-03-17 06:35:07,394 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2025-03-17 06:35:07,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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) [2025-03-17 06:35:07,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:07,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2025-03-17 06:35:07,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:07,896 INFO L124 PetriNetUnfolderBase]: 4357/6188 cut-off events. [2025-03-17 06:35:07,896 INFO L125 PetriNetUnfolderBase]: For 2839/2973 co-relation queries the response was YES. [2025-03-17 06:35:07,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13971 conditions, 6188 events. 4357/6188 cut-off events. For 2839/2973 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 34246 event pairs, 1029 based on Foata normal form. 3/5280 useless extension candidates. Maximal degree in co-relation 13945. Up to 1821 conditions per place. [2025-03-17 06:35:07,928 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 81 selfloop transitions, 7 changer transitions 3/98 dead transitions. [2025-03-17 06:35:07,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 98 transitions, 517 flow [2025-03-17 06:35:07,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:35:07,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:35:07,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2025-03-17 06:35:07,932 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2025-03-17 06:35:07,932 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 142 flow. Second operand 7 states and 146 transitions. [2025-03-17 06:35:07,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 98 transitions, 517 flow [2025-03-17 06:35:07,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 98 transitions, 502 flow, removed 5 selfloop flow, removed 2 redundant places. [2025-03-17 06:35:07,936 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 170 flow [2025-03-17 06:35:07,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=170, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2025-03-17 06:35:07,937 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 15 predicate places. [2025-03-17 06:35:07,937 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 170 flow [2025-03-17 06:35:07,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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) [2025-03-17 06:35:07,937 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:07,937 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:07,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 06:35:08,137 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,SelfDestructingSolverStorable3 [2025-03-17 06:35:08,138 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:08,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:08,139 INFO L85 PathProgramCache]: Analyzing trace with hash 919001188, now seen corresponding path program 1 times [2025-03-17 06:35:08,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:08,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627315461] [2025-03-17 06:35:08,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:08,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:08,152 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 06:35:08,164 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 06:35:08,165 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:08,165 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:35:08,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:08,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627315461] [2025-03-17 06:35:08,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627315461] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:35:08,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:35:08,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:35:08,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927850716] [2025-03-17 06:35:08,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:08,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:35:08,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:08,268 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:35:08,268 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:35:08,276 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2025-03-17 06:35:08,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:08,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:08,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2025-03-17 06:35:08,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:08,711 INFO L124 PetriNetUnfolderBase]: 4149/6162 cut-off events. [2025-03-17 06:35:08,711 INFO L125 PetriNetUnfolderBase]: For 3047/3169 co-relation queries the response was YES. [2025-03-17 06:35:08,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14301 conditions, 6162 events. 4149/6162 cut-off events. For 3047/3169 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 37126 event pairs, 1700 based on Foata normal form. 123/5868 useless extension candidates. Maximal degree in co-relation 14271. Up to 2693 conditions per place. [2025-03-17 06:35:08,746 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 51 selfloop transitions, 4 changer transitions 21/85 dead transitions. [2025-03-17 06:35:08,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 85 transitions, 454 flow [2025-03-17 06:35:08,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:35:08,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:35:08,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2025-03-17 06:35:08,749 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.595 [2025-03-17 06:35:08,749 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 170 flow. Second operand 5 states and 119 transitions. [2025-03-17 06:35:08,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 85 transitions, 454 flow [2025-03-17 06:35:08,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 85 transitions, 450 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 06:35:08,754 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 184 flow [2025-03-17 06:35:08,755 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=184, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2025-03-17 06:35:08,756 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 19 predicate places. [2025-03-17 06:35:08,756 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 184 flow [2025-03-17 06:35:08,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:08,757 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:08,757 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:08,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 06:35:08,757 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:08,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:08,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1681215967, now seen corresponding path program 1 times [2025-03-17 06:35:08,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:08,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133004561] [2025-03-17 06:35:08,758 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:08,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:08,769 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 06:35:08,777 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 06:35:08,778 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:08,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:35:08,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:08,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133004561] [2025-03-17 06:35:08,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133004561] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:08,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137240947] [2025-03-17 06:35:08,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:08,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:35:08,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:35:08,932 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:35:08,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 06:35:08,997 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 06:35:09,022 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 06:35:09,022 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:09,022 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:09,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 06:35:09,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:35:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:35:09,136 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:35:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:35:09,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137240947] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:09,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:35:09,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2025-03-17 06:35:09,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603081498] [2025-03-17 06:35:09,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:09,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:35:09,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:09,248 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:35:09,248 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2025-03-17 06:35:09,259 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2025-03-17 06:35:09,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 184 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:09,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:09,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2025-03-17 06:35:09,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:09,961 INFO L124 PetriNetUnfolderBase]: 6384/9370 cut-off events. [2025-03-17 06:35:09,962 INFO L125 PetriNetUnfolderBase]: For 7284/7495 co-relation queries the response was YES. [2025-03-17 06:35:09,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22968 conditions, 9370 events. 6384/9370 cut-off events. For 7284/7495 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 56289 event pairs, 2331 based on Foata normal form. 0/8558 useless extension candidates. Maximal degree in co-relation 22936. Up to 3821 conditions per place. [2025-03-17 06:35:10,013 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 69 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2025-03-17 06:35:10,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 84 transitions, 496 flow [2025-03-17 06:35:10,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:35:10,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:35:10,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2025-03-17 06:35:10,017 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2025-03-17 06:35:10,017 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 184 flow. Second operand 7 states and 127 transitions. [2025-03-17 06:35:10,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 84 transitions, 496 flow [2025-03-17 06:35:10,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 84 transitions, 484 flow, removed 4 selfloop flow, removed 2 redundant places. [2025-03-17 06:35:10,024 INFO L231 Difference]: Finished difference. Result has 61 places, 47 transitions, 206 flow [2025-03-17 06:35:10,024 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=206, PETRI_PLACES=61, PETRI_TRANSITIONS=47} [2025-03-17 06:35:10,026 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 24 predicate places. [2025-03-17 06:35:10,026 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 47 transitions, 206 flow [2025-03-17 06:35:10,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:10,026 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:10,027 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:10,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 06:35:10,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:35:10,230 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:10,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:10,231 INFO L85 PathProgramCache]: Analyzing trace with hash 497720873, now seen corresponding path program 1 times [2025-03-17 06:35:10,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:10,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319176392] [2025-03-17 06:35:10,231 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:10,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:10,242 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-17 06:35:10,280 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 06:35:10,281 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:10,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:35:11,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:11,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319176392] [2025-03-17 06:35:11,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319176392] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:35:11,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:35:11,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 06:35:11,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565197473] [2025-03-17 06:35:11,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:11,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:35:11,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:11,294 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:35:11,294 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:35:11,307 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:35:11,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 47 transitions, 206 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:11,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:11,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:35:11,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:12,170 INFO L124 PetriNetUnfolderBase]: 9303/13428 cut-off events. [2025-03-17 06:35:12,171 INFO L125 PetriNetUnfolderBase]: For 10908/10908 co-relation queries the response was YES. [2025-03-17 06:35:12,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35808 conditions, 13428 events. 9303/13428 cut-off events. For 10908/10908 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 79009 event pairs, 2563 based on Foata normal form. 23/13435 useless extension candidates. Maximal degree in co-relation 35773. Up to 11743 conditions per place. [2025-03-17 06:35:12,229 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 76 selfloop transitions, 13 changer transitions 11/104 dead transitions. [2025-03-17 06:35:12,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 104 transitions, 599 flow [2025-03-17 06:35:12,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:35:12,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:35:12,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2025-03-17 06:35:12,231 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2025-03-17 06:35:12,231 INFO L175 Difference]: Start difference. First operand has 61 places, 47 transitions, 206 flow. Second operand 6 states and 134 transitions. [2025-03-17 06:35:12,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 104 transitions, 599 flow [2025-03-17 06:35:12,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 104 transitions, 593 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 06:35:12,252 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 312 flow [2025-03-17 06:35:12,253 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2025-03-17 06:35:12,253 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 29 predicate places. [2025-03-17 06:35:12,253 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 312 flow [2025-03-17 06:35:12,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:12,253 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:12,253 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:12,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 06:35:12,254 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:12,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:12,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1412820833, now seen corresponding path program 1 times [2025-03-17 06:35:12,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:12,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165159651] [2025-03-17 06:35:12,254 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:12,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:12,264 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-17 06:35:12,274 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:35:12,275 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:12,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:35:12,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:12,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165159651] [2025-03-17 06:35:12,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165159651] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:12,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191980674] [2025-03-17 06:35:12,405 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:12,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:35:12,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:35:12,407 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:35:12,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 06:35:12,469 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-17 06:35:12,492 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:35:12,492 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:12,492 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:12,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 06:35:12,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:35:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:35:12,593 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:35:12,613 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:35:12,614 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 43 treesize of output 39 [2025-03-17 06:35:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:35:12,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191980674] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:35:12,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:35:12,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2025-03-17 06:35:12,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031724650] [2025-03-17 06:35:12,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:35:12,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 06:35:12,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:12,683 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 06:35:12,683 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-03-17 06:35:12,713 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2025-03-17 06:35:12,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 312 flow. Second operand has 13 states, 13 states have (on average 15.076923076923077) internal successors, (196), 13 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:12,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:12,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2025-03-17 06:35:12,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:13,420 INFO L124 PetriNetUnfolderBase]: 8103/12333 cut-off events. [2025-03-17 06:35:13,420 INFO L125 PetriNetUnfolderBase]: For 18342/18643 co-relation queries the response was YES. [2025-03-17 06:35:13,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35269 conditions, 12333 events. 8103/12333 cut-off events. For 18342/18643 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 78713 event pairs, 5672 based on Foata normal form. 207/12519 useless extension candidates. Maximal degree in co-relation 35013. Up to 7003 conditions per place. [2025-03-17 06:35:13,555 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 86 selfloop transitions, 4 changer transitions 21/118 dead transitions. [2025-03-17 06:35:13,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 118 transitions, 873 flow [2025-03-17 06:35:13,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:35:13,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:35:13,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2025-03-17 06:35:13,560 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5541666666666667 [2025-03-17 06:35:13,560 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 312 flow. Second operand 6 states and 133 transitions. [2025-03-17 06:35:13,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 118 transitions, 873 flow [2025-03-17 06:35:13,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 118 transitions, 836 flow, removed 10 selfloop flow, removed 4 redundant places. [2025-03-17 06:35:13,582 INFO L231 Difference]: Finished difference. Result has 68 places, 58 transitions, 334 flow [2025-03-17 06:35:13,583 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=334, PETRI_PLACES=68, PETRI_TRANSITIONS=58} [2025-03-17 06:35:13,583 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 31 predicate places. [2025-03-17 06:35:13,583 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 58 transitions, 334 flow [2025-03-17 06:35:13,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.076923076923077) internal successors, (196), 13 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:13,584 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:13,584 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:13,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 06:35:13,784 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 [2025-03-17 06:35:13,785 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:13,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:13,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1937838885, now seen corresponding path program 1 times [2025-03-17 06:35:13,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:13,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606935029] [2025-03-17 06:35:13,788 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:13,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:13,801 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-17 06:35:13,844 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:35:13,846 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:13,846 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:35:14,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:14,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606935029] [2025-03-17 06:35:14,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606935029] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:14,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068221171] [2025-03-17 06:35:14,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:14,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:35:14,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:35:14,779 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:35:14,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 06:35:14,853 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-17 06:35:14,883 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:35:14,883 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:14,883 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:14,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-17 06:35:14,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:35:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:35:15,186 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:35:15,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068221171] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:35:15,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:35:15,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2025-03-17 06:35:15,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130544518] [2025-03-17 06:35:15,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:15,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:35:15,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:15,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:35:15,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2025-03-17 06:35:15,205 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2025-03-17 06:35:15,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 58 transitions, 334 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:15,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:15,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2025-03-17 06:35:15,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:16,256 INFO L124 PetriNetUnfolderBase]: 9525/14004 cut-off events. [2025-03-17 06:35:16,257 INFO L125 PetriNetUnfolderBase]: For 16188/16512 co-relation queries the response was YES. [2025-03-17 06:35:16,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39827 conditions, 14004 events. 9525/14004 cut-off events. For 16188/16512 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 85538 event pairs, 1284 based on Foata normal form. 4/13986 useless extension candidates. Maximal degree in co-relation 36472. Up to 9177 conditions per place. [2025-03-17 06:35:16,318 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 109 selfloop transitions, 24 changer transitions 2/140 dead transitions. [2025-03-17 06:35:16,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 140 transitions, 936 flow [2025-03-17 06:35:16,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:35:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:35:16,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2025-03-17 06:35:16,320 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.559375 [2025-03-17 06:35:16,320 INFO L175 Difference]: Start difference. First operand has 68 places, 58 transitions, 334 flow. Second operand 8 states and 179 transitions. [2025-03-17 06:35:16,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 140 transitions, 936 flow [2025-03-17 06:35:16,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 140 transitions, 918 flow, removed 7 selfloop flow, removed 3 redundant places. [2025-03-17 06:35:16,372 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 513 flow [2025-03-17 06:35:16,372 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=513, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2025-03-17 06:35:16,373 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 38 predicate places. [2025-03-17 06:35:16,373 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 513 flow [2025-03-17 06:35:16,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:16,374 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:16,374 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:16,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 06:35:16,574 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 [2025-03-17 06:35:16,575 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:16,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:16,575 INFO L85 PathProgramCache]: Analyzing trace with hash -382966995, now seen corresponding path program 1 times [2025-03-17 06:35:16,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:16,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12262783] [2025-03-17 06:35:16,575 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:35:16,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:16,588 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-17 06:35:16,619 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:35:16,620 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:35:16,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:35:17,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:17,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12262783] [2025-03-17 06:35:17,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12262783] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:35:17,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:35:17,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:35:17,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135840197] [2025-03-17 06:35:17,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:35:17,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:35:17,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:17,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:35:17,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:35:17,457 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:35:17,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 513 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:17,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:17,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:35:17,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:18,661 INFO L124 PetriNetUnfolderBase]: 11379/16552 cut-off events. [2025-03-17 06:35:18,662 INFO L125 PetriNetUnfolderBase]: For 28576/28600 co-relation queries the response was YES. [2025-03-17 06:35:18,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51340 conditions, 16552 events. 11379/16552 cut-off events. For 28576/28600 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 99159 event pairs, 3832 based on Foata normal form. 20/16544 useless extension candidates. Maximal degree in co-relation 47989. Up to 13789 conditions per place. [2025-03-17 06:35:18,786 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 97 selfloop transitions, 43 changer transitions 2/146 dead transitions. [2025-03-17 06:35:18,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 146 transitions, 1245 flow [2025-03-17 06:35:18,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:35:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:35:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2025-03-17 06:35:18,788 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.490625 [2025-03-17 06:35:18,788 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 513 flow. Second operand 8 states and 157 transitions. [2025-03-17 06:35:18,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 146 transitions, 1245 flow [2025-03-17 06:35:18,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 146 transitions, 1227 flow, removed 8 selfloop flow, removed 1 redundant places. [2025-03-17 06:35:18,897 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 956 flow [2025-03-17 06:35:18,897 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=956, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2025-03-17 06:35:18,898 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 48 predicate places. [2025-03-17 06:35:18,898 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 956 flow [2025-03-17 06:35:18,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:18,898 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:18,898 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:18,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-17 06:35:18,898 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:18,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:18,899 INFO L85 PathProgramCache]: Analyzing trace with hash -2135938333, now seen corresponding path program 2 times [2025-03-17 06:35:18,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:18,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510784571] [2025-03-17 06:35:18,900 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:35:18,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:18,911 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-03-17 06:35:18,963 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:35:18,964 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:35:18,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:35:20,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:20,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510784571] [2025-03-17 06:35:20,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510784571] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:20,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866005931] [2025-03-17 06:35:20,283 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:35:20,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:35:20,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:35:20,285 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:35:20,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 06:35:20,362 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-03-17 06:35:20,391 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:35:20,392 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:35:20,392 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:20,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-17 06:35:20,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:35:20,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:35:20,772 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:35:21,472 INFO L349 Elim1Store]: treesize reduction 22, result has 94.7 percent of original size [2025-03-17 06:35:21,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 122 treesize of output 433 [2025-03-17 06:35:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:35:52,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866005931] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:35:52,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:35:52,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 18 [2025-03-17 06:35:52,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783115092] [2025-03-17 06:35:52,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:35:52,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 06:35:52,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:35:52,019 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 06:35:52,020 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2025-03-17 06:35:52,037 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-03-17 06:35:52,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 956 flow. Second operand has 19 states, 19 states have (on average 10.157894736842104) internal successors, (193), 19 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:52,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:35:52,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-03-17 06:35:52,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:35:53,710 INFO L124 PetriNetUnfolderBase]: 12448/18067 cut-off events. [2025-03-17 06:35:53,710 INFO L125 PetriNetUnfolderBase]: For 38664/38664 co-relation queries the response was YES. [2025-03-17 06:35:53,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60018 conditions, 18067 events. 12448/18067 cut-off events. For 38664/38664 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 109947 event pairs, 4603 based on Foata normal form. 8/18069 useless extension candidates. Maximal degree in co-relation 56780. Up to 12178 conditions per place. [2025-03-17 06:35:53,908 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 131 selfloop transitions, 69 changer transitions 3/207 dead transitions. [2025-03-17 06:35:53,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 207 transitions, 1882 flow [2025-03-17 06:35:53,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 06:35:53,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-17 06:35:53,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 259 transitions. [2025-03-17 06:35:53,910 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43166666666666664 [2025-03-17 06:35:53,910 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 956 flow. Second operand 15 states and 259 transitions. [2025-03-17 06:35:53,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 207 transitions, 1882 flow [2025-03-17 06:35:54,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 207 transitions, 1854 flow, removed 13 selfloop flow, removed 1 redundant places. [2025-03-17 06:35:54,149 INFO L231 Difference]: Finished difference. Result has 102 places, 121 transitions, 1354 flow [2025-03-17 06:35:54,149 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=940, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1354, PETRI_PLACES=102, PETRI_TRANSITIONS=121} [2025-03-17 06:35:54,149 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 65 predicate places. [2025-03-17 06:35:54,149 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 121 transitions, 1354 flow [2025-03-17 06:35:54,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.157894736842104) internal successors, (193), 19 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:35:54,150 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:35:54,150 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:35:54,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 06:35:54,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:35:54,354 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:35:54,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:35:54,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1669630693, now seen corresponding path program 2 times [2025-03-17 06:35:54,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:35:54,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759737967] [2025-03-17 06:35:54,355 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:35:54,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:35:54,364 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-03-17 06:35:54,401 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:35:54,401 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:35:54,401 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:35:54,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:35:54,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759737967] [2025-03-17 06:35:54,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759737967] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:35:54,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260005951] [2025-03-17 06:35:54,953 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:35:54,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:35:54,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:35:54,955 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:35:54,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 06:35:55,028 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-03-17 06:35:55,053 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:35:55,053 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:35:55,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:35:55,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-03-17 06:35:55,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:35:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:35:55,467 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:35:55,924 INFO L349 Elim1Store]: treesize reduction 8, result has 96.5 percent of original size [2025-03-17 06:35:55,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 79 treesize of output 235 [2025-03-17 06:36:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:36:00,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260005951] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:36:00,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:36:00,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 20 [2025-03-17 06:36:00,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889480201] [2025-03-17 06:36:00,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:36:00,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-17 06:36:00,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:00,666 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-17 06:36:00,666 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2025-03-17 06:36:00,751 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2025-03-17 06:36:00,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 121 transitions, 1354 flow. Second operand has 21 states, 21 states have (on average 11.095238095238095) internal successors, (233), 21 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:00,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:00,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2025-03-17 06:36:00,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:02,691 INFO L124 PetriNetUnfolderBase]: 15124/22205 cut-off events. [2025-03-17 06:36:02,692 INFO L125 PetriNetUnfolderBase]: For 59437/59989 co-relation queries the response was YES. [2025-03-17 06:36:02,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74755 conditions, 22205 events. 15124/22205 cut-off events. For 59437/59989 co-relation queries the response was YES. Maximal size of possible extension queue 1083. Compared 143648 event pairs, 2864 based on Foata normal form. 24/22207 useless extension candidates. Maximal degree in co-relation 71870. Up to 11874 conditions per place. [2025-03-17 06:36:02,902 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 184 selfloop transitions, 71 changer transitions 12/272 dead transitions. [2025-03-17 06:36:02,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 272 transitions, 2582 flow [2025-03-17 06:36:02,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-17 06:36:02,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-17 06:36:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 301 transitions. [2025-03-17 06:36:02,903 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5375 [2025-03-17 06:36:02,903 INFO L175 Difference]: Start difference. First operand has 102 places, 121 transitions, 1354 flow. Second operand 14 states and 301 transitions. [2025-03-17 06:36:02,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 272 transitions, 2582 flow [2025-03-17 06:36:03,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 272 transitions, 2502 flow, removed 17 selfloop flow, removed 4 redundant places. [2025-03-17 06:36:03,281 INFO L231 Difference]: Finished difference. Result has 119 places, 140 transitions, 1676 flow [2025-03-17 06:36:03,281 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1284, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1676, PETRI_PLACES=119, PETRI_TRANSITIONS=140} [2025-03-17 06:36:03,283 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 82 predicate places. [2025-03-17 06:36:03,283 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 140 transitions, 1676 flow [2025-03-17 06:36:03,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.095238095238095) internal successors, (233), 21 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:03,284 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:03,284 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:03,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-17 06:36:03,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:03,488 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:36:03,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:03,488 INFO L85 PathProgramCache]: Analyzing trace with hash 757023823, now seen corresponding path program 3 times [2025-03-17 06:36:03,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:03,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563412460] [2025-03-17 06:36:03,488 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:36:03,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:03,498 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 31 statements into 2 equivalence classes. [2025-03-17 06:36:03,511 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 28 of 31 statements. [2025-03-17 06:36:03,512 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 06:36:03,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:36:04,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:04,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563412460] [2025-03-17 06:36:04,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563412460] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:36:04,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:36:04,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-17 06:36:04,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012387840] [2025-03-17 06:36:04,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:36:04,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:36:04,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:36:04,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:36:04,017 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:36:04,055 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2025-03-17 06:36:04,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 140 transitions, 1676 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:04,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:36:04,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2025-03-17 06:36:04,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:36:05,791 INFO L124 PetriNetUnfolderBase]: 16482/24229 cut-off events. [2025-03-17 06:36:05,791 INFO L125 PetriNetUnfolderBase]: For 83058/83662 co-relation queries the response was YES. [2025-03-17 06:36:05,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89108 conditions, 24229 events. 16482/24229 cut-off events. For 83058/83662 co-relation queries the response was YES. Maximal size of possible extension queue 1196. Compared 158629 event pairs, 6476 based on Foata normal form. 8/24219 useless extension candidates. Maximal degree in co-relation 87084. Up to 20196 conditions per place. [2025-03-17 06:36:06,040 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 151 selfloop transitions, 55 changer transitions 3/214 dead transitions. [2025-03-17 06:36:06,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 214 transitions, 2488 flow [2025-03-17 06:36:06,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:36:06,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:36:06,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2025-03-17 06:36:06,041 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.540625 [2025-03-17 06:36:06,042 INFO L175 Difference]: Start difference. First operand has 119 places, 140 transitions, 1676 flow. Second operand 8 states and 173 transitions. [2025-03-17 06:36:06,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 214 transitions, 2488 flow [2025-03-17 06:36:06,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 214 transitions, 2394 flow, removed 19 selfloop flow, removed 4 redundant places. [2025-03-17 06:36:06,723 INFO L231 Difference]: Finished difference. Result has 125 places, 151 transitions, 1887 flow [2025-03-17 06:36:06,724 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1887, PETRI_PLACES=125, PETRI_TRANSITIONS=151} [2025-03-17 06:36:06,724 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 88 predicate places. [2025-03-17 06:36:06,724 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 151 transitions, 1887 flow [2025-03-17 06:36:06,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:36:06,724 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:36:06,724 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:36:06,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-17 06:36:06,725 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:36:06,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:36:06,725 INFO L85 PathProgramCache]: Analyzing trace with hash -837636355, now seen corresponding path program 4 times [2025-03-17 06:36:06,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:36:06,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031124384] [2025-03-17 06:36:06,725 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:36:06,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:36:06,734 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 31 statements into 2 equivalence classes. [2025-03-17 06:36:06,743 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:36:06,743 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:36:06,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:36:07,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:36:07,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031124384] [2025-03-17 06:36:07,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031124384] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:36:07,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146087965] [2025-03-17 06:36:07,521 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:36:07,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:36:07,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:36:07,523 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:36:07,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 06:36:07,597 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 31 statements into 2 equivalence classes. [2025-03-17 06:36:07,623 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:36:07,624 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:36:07,624 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:36:07,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 06:36:07,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:36:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:36:07,849 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:36:08,469 INFO L349 Elim1Store]: treesize reduction 22, result has 94.7 percent of original size [2025-03-17 06:36:08,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 122 treesize of output 433