./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 25cf9c0a16564c460f6e824f90a2df4185d2e5d2c682a221258efaf06dec8ca4 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 01:18:05,572 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 01:18:05,629 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-08 01:18:05,635 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 01:18:05,638 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 01:18:05,652 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 01:18:05,652 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 01:18:05,652 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 01:18:05,653 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 01:18:05,653 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 01:18:05,653 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 01:18:05,653 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 01:18:05,653 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 01:18:05,653 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 01:18:05,653 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 01:18:05,653 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 01:18:05,653 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-08 01:18:05,654 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 01:18:05,654 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 01:18:05,654 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 01:18:05,654 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 01:18:05,654 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-08 01:18:05,654 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 01:18:05,654 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-08 01:18:05,654 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 01:18:05,654 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-08 01:18:05,654 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 01:18:05,654 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 01:18:05,655 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 01:18:05,655 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 01:18:05,655 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 01:18:05,655 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 01:18:05,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 01:18:05,655 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 01:18:05,655 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 01:18:05,655 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-08 01:18:05,655 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-08 01:18:05,655 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 01:18:05,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 01:18:05,656 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 01:18:05,656 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 01:18:05,656 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 01:18:05,656 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 01:18:05,656 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-jdk21/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 -> 25cf9c0a16564c460f6e824f90a2df4185d2e5d2c682a221258efaf06dec8ca4 [2025-02-08 01:18:05,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 01:18:05,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 01:18:05,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 01:18:05,902 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 01:18:05,902 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 01:18:05,904 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2025-02-08 01:18:07,107 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/724195ecf/b7782a11171041d287702b2ed3cd91b0/FLAGcaf809127 [2025-02-08 01:18:07,319 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 01:18:07,324 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2025-02-08 01:18:07,338 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/724195ecf/b7782a11171041d287702b2ed3cd91b0/FLAGcaf809127 [2025-02-08 01:18:07,372 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/724195ecf/b7782a11171041d287702b2ed3cd91b0 [2025-02-08 01:18:07,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 01:18:07,376 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 01:18:07,377 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 01:18:07,377 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 01:18:07,381 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 01:18:07,382 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 01:18:07" (1/1) ... [2025-02-08 01:18:07,383 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e519300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:18:07, skipping insertion in model container [2025-02-08 01:18:07,384 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 01:18:07" (1/1) ... [2025-02-08 01:18:07,396 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 01:18:07,517 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c[2625,2638] [2025-02-08 01:18:07,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 01:18:07,528 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 01:18:07,541 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c[2625,2638] [2025-02-08 01:18:07,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 01:18:07,552 INFO L204 MainTranslator]: Completed translation [2025-02-08 01:18:07,553 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:18:07 WrapperNode [2025-02-08 01:18:07,553 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 01:18:07,554 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 01:18:07,554 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 01:18:07,554 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 01:18:07,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:18:07" (1/1) ... [2025-02-08 01:18:07,563 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:18:07" (1/1) ... [2025-02-08 01:18:07,574 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 84 [2025-02-08 01:18:07,575 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 01:18:07,575 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 01:18:07,575 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 01:18:07,576 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 01:18:07,580 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:18:07" (1/1) ... [2025-02-08 01:18:07,581 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:18:07" (1/1) ... [2025-02-08 01:18:07,582 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:18:07" (1/1) ... [2025-02-08 01:18:07,591 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-08 01:18:07,592 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:18:07" (1/1) ... [2025-02-08 01:18:07,592 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:18:07" (1/1) ... [2025-02-08 01:18:07,595 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:18:07" (1/1) ... [2025-02-08 01:18:07,596 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:18:07" (1/1) ... [2025-02-08 01:18:07,597 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:18:07" (1/1) ... [2025-02-08 01:18:07,598 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:18:07" (1/1) ... [2025-02-08 01:18:07,599 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 01:18:07,600 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 01:18:07,600 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 01:18:07,600 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 01:18:07,601 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:18:07" (1/1) ... [2025-02-08 01:18:07,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 01:18:07,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:18:07,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-08 01:18:07,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-08 01:18:07,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 01:18:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 01:18:07,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 01:18:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 01:18:07,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 01:18:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-08 01:18:07,659 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-08 01:18:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 01:18:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 01:18:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 01:18:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 01:18:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-08 01:18:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-08 01:18:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 01:18:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 01:18:07,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 01:18:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 01:18:07,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 01:18:07,660 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-08 01:18:07,725 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 01:18:07,727 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 01:18:07,921 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 01:18:07,925 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 01:18:08,086 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 01:18:08,086 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 01:18:08,087 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 01:18:08 BoogieIcfgContainer [2025-02-08 01:18:08,087 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 01:18:08,089 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 01:18:08,089 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 01:18:08,092 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 01:18:08,092 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 01:18:07" (1/3) ... [2025-02-08 01:18:08,093 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5647c3b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 01:18:08, skipping insertion in model container [2025-02-08 01:18:08,093 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 01:18:07" (2/3) ... [2025-02-08 01:18:08,093 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5647c3b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 01:18:08, skipping insertion in model container [2025-02-08 01:18:08,093 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 01:18:08" (3/3) ... [2025-02-08 01:18:08,094 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2025-02-08 01:18:08,105 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 01:18:08,106 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-max-array-hom.wvr.c that has 4 procedures, 30 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-02-08 01:18:08,107 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 01:18:08,154 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-08 01:18:08,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 33 transitions, 87 flow [2025-02-08 01:18:08,202 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2025-02-08 01:18:08,204 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 01:18:08,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 30 events. 4/30 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2025-02-08 01:18:08,206 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 33 transitions, 87 flow [2025-02-08 01:18:08,207 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 29 transitions, 76 flow [2025-02-08 01:18:08,215 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 01:18:08,224 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;@1d09d92a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 01:18:08,225 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-02-08 01:18:08,232 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 01:18:08,232 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2025-02-08 01:18:08,233 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 01:18:08,233 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:18:08,234 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:18:08,235 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)] === [2025-02-08 01:18:08,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:18:08,240 INFO L85 PathProgramCache]: Analyzing trace with hash -288399638, now seen corresponding path program 1 times [2025-02-08 01:18:08,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:18:08,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054083519] [2025-02-08 01:18:08,246 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:18:08,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:18:08,329 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-02-08 01:18:08,367 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-02-08 01:18:08,367 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:18:08,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:18:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:18:08,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:18:08,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054083519] [2025-02-08 01:18:08,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054083519] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:18:08,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:18:08,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 01:18:08,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782127574] [2025-02-08 01:18:08,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:18:08,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 01:18:08,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:18:08,600 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 01:18:08,601 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 01:18:08,601 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-02-08 01:18:08,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2025-02-08 01:18:08,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:18:08,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-02-08 01:18:08,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:18:08,786 INFO L124 PetriNetUnfolderBase]: 617/954 cut-off events. [2025-02-08 01:18:08,787 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2025-02-08 01:18:08,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1949 conditions, 954 events. 617/954 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3786 event pairs, 126 based on Foata normal form. 1/950 useless extension candidates. Maximal degree in co-relation 1715. Up to 677 conditions per place. [2025-02-08 01:18:08,797 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 37 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2025-02-08 01:18:08,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 209 flow [2025-02-08 01:18:08,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 01:18:08,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 01:18:08,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2025-02-08 01:18:08,807 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6464646464646465 [2025-02-08 01:18:08,808 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 76 flow. Second operand 3 states and 64 transitions. [2025-02-08 01:18:08,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 209 flow [2025-02-08 01:18:08,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 187 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 01:18:08,816 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 90 flow [2025-02-08 01:18:08,818 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2025-02-08 01:18:08,820 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -3 predicate places. [2025-02-08 01:18:08,821 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 90 flow [2025-02-08 01:18:08,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2025-02-08 01:18:08,822 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:18:08,822 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] [2025-02-08 01:18:08,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 01:18:08,823 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)] === [2025-02-08 01:18:08,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:18:08,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1927866102, now seen corresponding path program 1 times [2025-02-08 01:18:08,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:18:08,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910882283] [2025-02-08 01:18:08,824 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:18:08,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:18:08,835 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-08 01:18:08,854 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 01:18:08,854 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:18:08,857 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:18:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:18:09,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:18:09,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910882283] [2025-02-08 01:18:09,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910882283] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:18:09,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:18:09,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 01:18:09,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972155052] [2025-02-08 01:18:09,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:18:09,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 01:18:09,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:18:09,003 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 01:18:09,003 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 01:18:09,008 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-02-08 01:18:09,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:18:09,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:18:09,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-02-08 01:18:09,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:18:09,112 INFO L124 PetriNetUnfolderBase]: 617/965 cut-off events. [2025-02-08 01:18:09,112 INFO L125 PetriNetUnfolderBase]: For 199/199 co-relation queries the response was YES. [2025-02-08 01:18:09,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2170 conditions, 965 events. 617/965 cut-off events. For 199/199 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4084 event pairs, 407 based on Foata normal form. 0/957 useless extension candidates. Maximal degree in co-relation 802. Up to 895 conditions per place. [2025-02-08 01:18:09,120 INFO L140 encePairwiseOnDemand]: 30/33 looper letters, 27 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2025-02-08 01:18:09,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 33 transitions, 150 flow [2025-02-08 01:18:09,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 01:18:09,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 01:18:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2025-02-08 01:18:09,122 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2025-02-08 01:18:09,122 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 90 flow. Second operand 3 states and 48 transitions. [2025-02-08 01:18:09,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 33 transitions, 150 flow [2025-02-08 01:18:09,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 33 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 01:18:09,124 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 98 flow [2025-02-08 01:18:09,124 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2025-02-08 01:18:09,125 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -1 predicate places. [2025-02-08 01:18:09,125 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 98 flow [2025-02-08 01:18:09,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:18:09,125 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:18:09,126 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:18:09,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 01:18:09,126 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)] === [2025-02-08 01:18:09,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:18:09,126 INFO L85 PathProgramCache]: Analyzing trace with hash -174048248, now seen corresponding path program 1 times [2025-02-08 01:18:09,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:18:09,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799710525] [2025-02-08 01:18:09,126 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:18:09,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:18:09,135 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-08 01:18:09,147 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 01:18:09,150 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:18:09,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:18:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:18:09,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:18:09,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799710525] [2025-02-08 01:18:09,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799710525] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:18:09,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 01:18:09,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 01:18:09,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933659049] [2025-02-08 01:18:09,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:18:09,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 01:18:09,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:18:09,218 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 01:18:09,218 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 01:18:09,226 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-02-08 01:18:09,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:18:09,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:18:09,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-02-08 01:18:09,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:18:09,377 INFO L124 PetriNetUnfolderBase]: 790/1161 cut-off events. [2025-02-08 01:18:09,378 INFO L125 PetriNetUnfolderBase]: For 187/187 co-relation queries the response was YES. [2025-02-08 01:18:09,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2575 conditions, 1161 events. 790/1161 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4573 event pairs, 246 based on Foata normal form. 0/1118 useless extension candidates. Maximal degree in co-relation 2562. Up to 576 conditions per place. [2025-02-08 01:18:09,382 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 40 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2025-02-08 01:18:09,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 47 transitions, 224 flow [2025-02-08 01:18:09,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 01:18:09,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 01:18:09,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2025-02-08 01:18:09,384 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2025-02-08 01:18:09,384 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 98 flow. Second operand 4 states and 63 transitions. [2025-02-08 01:18:09,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 47 transitions, 224 flow [2025-02-08 01:18:09,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 47 transitions, 218 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-02-08 01:18:09,386 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 113 flow [2025-02-08 01:18:09,387 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2025-02-08 01:18:09,388 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2025-02-08 01:18:09,388 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 113 flow [2025-02-08 01:18:09,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:18:09,388 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:18:09,388 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:18:09,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 01:18:09,389 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)] === [2025-02-08 01:18:09,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:18:09,389 INFO L85 PathProgramCache]: Analyzing trace with hash 89742482, now seen corresponding path program 1 times [2025-02-08 01:18:09,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:18:09,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669528318] [2025-02-08 01:18:09,390 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:18:09,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:18:09,398 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-08 01:18:09,406 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 01:18:09,407 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:18:09,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:18:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:18:09,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:18:09,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669528318] [2025-02-08 01:18:09,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669528318] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:18:09,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455911143] [2025-02-08 01:18:09,521 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:18:09,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:18:09,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:18:09,527 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:18:09,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-08 01:18:09,575 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-08 01:18:09,595 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 01:18:09,595 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:18:09,595 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:18:09,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-08 01:18:09,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:18:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:18:09,639 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:18:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:18:09,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455911143] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 01:18:09,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 01:18:09,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2025-02-08 01:18:09,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022031611] [2025-02-08 01:18:09,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:18:09,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 01:18:09,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:18:09,676 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 01:18:09,676 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-02-08 01:18:09,681 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-02-08 01:18:09,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2025-02-08 01:18:09,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:18:09,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-02-08 01:18:09,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:18:09,823 INFO L124 PetriNetUnfolderBase]: 855/1295 cut-off events. [2025-02-08 01:18:09,823 INFO L125 PetriNetUnfolderBase]: For 505/505 co-relation queries the response was YES. [2025-02-08 01:18:09,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3247 conditions, 1295 events. 855/1295 cut-off events. For 505/505 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5382 event pairs, 256 based on Foata normal form. 0/1230 useless extension candidates. Maximal degree in co-relation 3227. Up to 670 conditions per place. [2025-02-08 01:18:09,829 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 41 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2025-02-08 01:18:09,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 257 flow [2025-02-08 01:18:09,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 01:18:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 01:18:09,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2025-02-08 01:18:09,831 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2025-02-08 01:18:09,831 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 113 flow. Second operand 5 states and 72 transitions. [2025-02-08 01:18:09,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 257 flow [2025-02-08 01:18:09,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 251 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 01:18:09,833 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 132 flow [2025-02-08 01:18:09,834 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2025-02-08 01:18:09,834 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2025-02-08 01:18:09,834 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 132 flow [2025-02-08 01:18:09,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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) [2025-02-08 01:18:09,834 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:18:09,834 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] [2025-02-08 01:18:09,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-08 01:18:10,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:18:10,036 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)] === [2025-02-08 01:18:10,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:18:10,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1403388776, now seen corresponding path program 1 times [2025-02-08 01:18:10,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:18:10,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417632757] [2025-02-08 01:18:10,037 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:18:10,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:18:10,044 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-08 01:18:10,059 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 01:18:10,059 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:18:10,059 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:18:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:18:10,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:18:10,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417632757] [2025-02-08 01:18:10,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417632757] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:18:10,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582286815] [2025-02-08 01:18:10,961 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 01:18:10,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:18:10,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:18:10,966 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:18:10,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-08 01:18:11,019 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-08 01:18:11,046 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 01:18:11,047 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:18:11,047 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:18:11,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-08 01:18:11,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:18:11,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-08 01:18:11,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 31 [2025-02-08 01:18:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:18:11,431 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:18:13,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 207 [2025-02-08 01:18:13,196 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:18:13,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 260 treesize of output 290 [2025-02-08 01:18:41,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 294 treesize of output 264 [2025-02-08 01:18:41,879 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2025-02-08 01:18:41,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 387 treesize of output 1 [2025-02-08 01:18:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:18:41,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582286815] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:18:41,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:18:41,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2025-02-08 01:18:41,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093660127] [2025-02-08 01:18:41,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:18:41,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-08 01:18:41,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:18:41,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-08 01:18:41,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2025-02-08 01:18:42,136 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-02-08 01:18:42,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 132 flow. Second operand has 25 states, 25 states have (on average 8.88) internal successors, (222), 25 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:18:42,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:18:42,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-02-08 01:18:42,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:18:44,673 INFO L124 PetriNetUnfolderBase]: 1841/2761 cut-off events. [2025-02-08 01:18:44,674 INFO L125 PetriNetUnfolderBase]: For 1721/1721 co-relation queries the response was YES. [2025-02-08 01:18:44,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7669 conditions, 2761 events. 1841/2761 cut-off events. For 1721/1721 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12698 event pairs, 106 based on Foata normal form. 1/2761 useless extension candidates. Maximal degree in co-relation 5614. Up to 1375 conditions per place. [2025-02-08 01:18:44,688 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 137 selfloop transitions, 57 changer transitions 1/199 dead transitions. [2025-02-08 01:18:44,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 199 transitions, 1067 flow [2025-02-08 01:18:44,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-08 01:18:44,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-02-08 01:18:44,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 321 transitions. [2025-02-08 01:18:44,694 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2025-02-08 01:18:44,694 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 132 flow. Second operand 21 states and 321 transitions. [2025-02-08 01:18:44,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 199 transitions, 1067 flow [2025-02-08 01:18:44,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 199 transitions, 1050 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 01:18:44,702 INFO L231 Difference]: Finished difference. Result has 64 places, 91 transitions, 543 flow [2025-02-08 01:18:44,703 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=543, PETRI_PLACES=64, PETRI_TRANSITIONS=91} [2025-02-08 01:18:44,703 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 29 predicate places. [2025-02-08 01:18:44,703 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 91 transitions, 543 flow [2025-02-08 01:18:44,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.88) internal successors, (222), 25 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:18:44,704 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:18:44,704 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] [2025-02-08 01:18:44,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-08 01:18:44,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:18:44,905 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)] === [2025-02-08 01:18:44,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:18:44,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1078187712, now seen corresponding path program 2 times [2025-02-08 01:18:44,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:18:44,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858925834] [2025-02-08 01:18:44,906 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:18:44,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:18:44,919 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-08 01:18:44,951 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 01:18:44,951 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:18:44,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:18:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:18:45,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:18:45,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858925834] [2025-02-08 01:18:45,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858925834] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:18:45,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689811065] [2025-02-08 01:18:45,430 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:18:45,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:18:45,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:18:45,432 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:18:45,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-08 01:18:45,468 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-08 01:18:45,483 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 01:18:45,483 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:18:45,483 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:18:45,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-02-08 01:18:45,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:18:45,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-08 01:18:45,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 30 [2025-02-08 01:18:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:18:45,779 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:18:46,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 207 [2025-02-08 01:18:47,026 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:18:47,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 260 treesize of output 290 [2025-02-08 01:19:12,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 294 treesize of output 264 [2025-02-08 01:19:12,706 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2025-02-08 01:19:12,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 387 treesize of output 1 [2025-02-08 01:19:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:19:12,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689811065] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:19:12,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:19:12,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2025-02-08 01:19:12,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095708850] [2025-02-08 01:19:12,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:19:12,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-08 01:19:12,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:19:12,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-08 01:19:12,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2025-02-08 01:19:12,883 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-02-08 01:19:12,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 91 transitions, 543 flow. Second operand has 21 states, 21 states have (on average 10.047619047619047) internal successors, (211), 21 states have internal predecessors, (211), 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) [2025-02-08 01:19:12,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:19:12,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-02-08 01:19:12,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:19:14,451 INFO L124 PetriNetUnfolderBase]: 2050/3333 cut-off events. [2025-02-08 01:19:14,452 INFO L125 PetriNetUnfolderBase]: For 4846/4846 co-relation queries the response was YES. [2025-02-08 01:19:14,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10794 conditions, 3333 events. 2050/3333 cut-off events. For 4846/4846 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 18111 event pairs, 124 based on Foata normal form. 3/3334 useless extension candidates. Maximal degree in co-relation 10232. Up to 1815 conditions per place. [2025-02-08 01:19:14,470 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 193 selfloop transitions, 121 changer transitions 2/322 dead transitions. [2025-02-08 01:19:14,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 322 transitions, 2167 flow [2025-02-08 01:19:14,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-02-08 01:19:14,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-02-08 01:19:14,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 474 transitions. [2025-02-08 01:19:14,472 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4633431085043988 [2025-02-08 01:19:14,472 INFO L175 Difference]: Start difference. First operand has 64 places, 91 transitions, 543 flow. Second operand 31 states and 474 transitions. [2025-02-08 01:19:14,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 322 transitions, 2167 flow [2025-02-08 01:19:14,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 322 transitions, 1959 flow, removed 77 selfloop flow, removed 3 redundant places. [2025-02-08 01:19:14,483 INFO L231 Difference]: Finished difference. Result has 105 places, 182 transitions, 1307 flow [2025-02-08 01:19:14,483 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1307, PETRI_PLACES=105, PETRI_TRANSITIONS=182} [2025-02-08 01:19:14,484 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 70 predicate places. [2025-02-08 01:19:14,484 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 182 transitions, 1307 flow [2025-02-08 01:19:14,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 10.047619047619047) internal successors, (211), 21 states have internal predecessors, (211), 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) [2025-02-08 01:19:14,484 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:19:14,484 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] [2025-02-08 01:19:14,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-08 01:19:14,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:19:14,685 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)] === [2025-02-08 01:19:14,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:19:14,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1554067698, now seen corresponding path program 3 times [2025-02-08 01:19:14,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:19:14,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019694053] [2025-02-08 01:19:14,686 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 01:19:14,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:19:14,695 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 2 equivalence classes. [2025-02-08 01:19:14,715 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 01:19:14,716 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 01:19:14,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:19:15,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:19:15,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019694053] [2025-02-08 01:19:15,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019694053] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:19:15,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818810764] [2025-02-08 01:19:15,093 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 01:19:15,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:19:15,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:19:15,095 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:19:15,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-08 01:19:15,135 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 26 statements into 2 equivalence classes. [2025-02-08 01:19:15,151 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 01:19:15,151 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 01:19:15,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:15,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-02-08 01:19:15,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:19:15,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-08 01:19:15,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 31 [2025-02-08 01:19:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:19:15,424 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:19:16,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 96 [2025-02-08 01:19:16,705 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:19:16,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 119 [2025-02-08 01:19:16,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 166 [2025-02-08 01:19:16,986 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2025-02-08 01:19:16,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 214 treesize of output 1 [2025-02-08 01:19:16,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 205 [2025-02-08 01:19:16,998 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2025-02-08 01:19:16,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 311 treesize of output 1 [2025-02-08 01:19:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:19:17,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818810764] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:19:17,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:19:17,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 23 [2025-02-08 01:19:17,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213465796] [2025-02-08 01:19:17,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:19:17,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-08 01:19:17,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:19:17,046 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-08 01:19:17,046 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2025-02-08 01:19:17,183 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-02-08 01:19:17,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 182 transitions, 1307 flow. Second operand has 24 states, 24 states have (on average 9.708333333333334) internal successors, (233), 24 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) [2025-02-08 01:19:17,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:19:17,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-02-08 01:19:17,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:19:19,473 INFO L124 PetriNetUnfolderBase]: 3836/6234 cut-off events. [2025-02-08 01:19:19,473 INFO L125 PetriNetUnfolderBase]: For 16948/16988 co-relation queries the response was YES. [2025-02-08 01:19:19,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24011 conditions, 6234 events. 3836/6234 cut-off events. For 16948/16988 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 38147 event pairs, 291 based on Foata normal form. 28/6260 useless extension candidates. Maximal degree in co-relation 22873. Up to 2782 conditions per place. [2025-02-08 01:19:19,519 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 233 selfloop transitions, 247 changer transitions 2/488 dead transitions. [2025-02-08 01:19:19,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 488 transitions, 4097 flow [2025-02-08 01:19:19,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-02-08 01:19:19,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-02-08 01:19:19,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 523 transitions. [2025-02-08 01:19:19,521 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4661319073083779 [2025-02-08 01:19:19,521 INFO L175 Difference]: Start difference. First operand has 105 places, 182 transitions, 1307 flow. Second operand 34 states and 523 transitions. [2025-02-08 01:19:19,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 488 transitions, 4097 flow [2025-02-08 01:19:19,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 488 transitions, 3910 flow, removed 91 selfloop flow, removed 2 redundant places. [2025-02-08 01:19:19,559 INFO L231 Difference]: Finished difference. Result has 148 places, 329 transitions, 3031 flow [2025-02-08 01:19:19,559 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=3031, PETRI_PLACES=148, PETRI_TRANSITIONS=329} [2025-02-08 01:19:19,560 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 113 predicate places. [2025-02-08 01:19:19,560 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 329 transitions, 3031 flow [2025-02-08 01:19:19,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.708333333333334) internal successors, (233), 24 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) [2025-02-08 01:19:19,560 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:19:19,560 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] [2025-02-08 01:19:19,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-08 01:19:19,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-08 01:19:19,761 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)] === [2025-02-08 01:19:19,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:19:19,761 INFO L85 PathProgramCache]: Analyzing trace with hash 343703108, now seen corresponding path program 4 times [2025-02-08 01:19:19,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:19:19,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649537126] [2025-02-08 01:19:19,761 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 01:19:19,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:19:19,766 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-02-08 01:19:19,784 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 01:19:19,784 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 01:19:19,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:19:20,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:19:20,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649537126] [2025-02-08 01:19:20,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649537126] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:19:20,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329897696] [2025-02-08 01:19:20,169 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 01:19:20,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:19:20,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:19:20,171 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:19:20,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-08 01:19:20,211 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-02-08 01:19:20,228 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 01:19:20,228 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 01:19:20,228 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:20,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-02-08 01:19:20,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:19:20,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-08 01:19:20,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 31 [2025-02-08 01:19:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:19:20,529 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:19:21,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 98 [2025-02-08 01:19:21,831 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:19:21,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 119 [2025-02-08 01:19:22,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 121 [2025-02-08 01:19:22,049 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2025-02-08 01:19:22,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 1 [2025-02-08 01:19:22,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 141 [2025-02-08 01:19:22,059 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2025-02-08 01:19:22,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 207 treesize of output 1 [2025-02-08 01:19:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:19:22,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329897696] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:19:22,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:19:22,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2025-02-08 01:19:22,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883233096] [2025-02-08 01:19:22,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:19:22,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-08 01:19:22,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:19:22,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-08 01:19:22,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2025-02-08 01:19:22,209 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-02-08 01:19:22,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 329 transitions, 3031 flow. Second operand has 24 states, 24 states have (on average 8.625) internal successors, (207), 24 states have internal predecessors, (207), 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) [2025-02-08 01:19:22,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:19:22,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-02-08 01:19:22,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:19:24,319 INFO L124 PetriNetUnfolderBase]: 5690/9090 cut-off events. [2025-02-08 01:19:24,320 INFO L125 PetriNetUnfolderBase]: For 34131/34145 co-relation queries the response was YES. [2025-02-08 01:19:24,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38738 conditions, 9090 events. 5690/9090 cut-off events. For 34131/34145 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 58327 event pairs, 1179 based on Foata normal form. 14/9101 useless extension candidates. Maximal degree in co-relation 37082. Up to 6655 conditions per place. [2025-02-08 01:19:24,379 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 337 selfloop transitions, 152 changer transitions 1/495 dead transitions. [2025-02-08 01:19:24,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 495 transitions, 5106 flow [2025-02-08 01:19:24,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-08 01:19:24,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-02-08 01:19:24,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 370 transitions. [2025-02-08 01:19:24,381 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4152637485970819 [2025-02-08 01:19:24,381 INFO L175 Difference]: Start difference. First operand has 148 places, 329 transitions, 3031 flow. Second operand 27 states and 370 transitions. [2025-02-08 01:19:24,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 495 transitions, 5106 flow [2025-02-08 01:19:24,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 495 transitions, 4883 flow, removed 58 selfloop flow, removed 12 redundant places. [2025-02-08 01:19:24,486 INFO L231 Difference]: Finished difference. Result has 170 places, 396 transitions, 3931 flow [2025-02-08 01:19:24,487 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2823, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3931, PETRI_PLACES=170, PETRI_TRANSITIONS=396} [2025-02-08 01:19:24,487 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 135 predicate places. [2025-02-08 01:19:24,487 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 396 transitions, 3931 flow [2025-02-08 01:19:24,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.625) internal successors, (207), 24 states have internal predecessors, (207), 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) [2025-02-08 01:19:24,487 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:19:24,488 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] [2025-02-08 01:19:24,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-08 01:19:24,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:19:24,692 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)] === [2025-02-08 01:19:24,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:19:24,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1907401246, now seen corresponding path program 5 times [2025-02-08 01:19:24,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:19:24,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031001993] [2025-02-08 01:19:24,693 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 01:19:24,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:19:24,698 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-08 01:19:24,711 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 01:19:24,712 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:19:24,712 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:19:25,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:19:25,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031001993] [2025-02-08 01:19:25,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031001993] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:19:25,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43343860] [2025-02-08 01:19:25,167 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 01:19:25,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:19:25,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:19:25,169 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:19:25,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-08 01:19:25,210 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-02-08 01:19:25,227 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 01:19:25,227 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:19:25,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:25,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-02-08 01:19:25,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:19:25,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-08 01:19:25,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 31 [2025-02-08 01:19:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:19:25,505 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:19:26,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 205 [2025-02-08 01:19:26,766 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 01:19:26,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 311 treesize of output 291 [2025-02-08 01:19:29,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 96 [2025-02-08 01:19:29,935 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-08 01:19:29,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 115 [2025-02-08 01:19:30,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 166 [2025-02-08 01:19:30,100 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2025-02-08 01:19:30,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 214 treesize of output 1 [2025-02-08 01:19:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 01:19:30,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43343860] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:19:30,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:19:30,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 24 [2025-02-08 01:19:30,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976882609] [2025-02-08 01:19:30,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:19:30,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-08 01:19:30,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:19:30,153 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-08 01:19:30,153 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2025-02-08 01:19:30,342 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-02-08 01:19:30,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 396 transitions, 3931 flow. Second operand has 25 states, 25 states have (on average 9.52) internal successors, (238), 25 states have internal predecessors, (238), 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) [2025-02-08 01:19:30,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:19:30,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-02-08 01:19:30,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:19:32,906 INFO L124 PetriNetUnfolderBase]: 5373/8693 cut-off events. [2025-02-08 01:19:32,906 INFO L125 PetriNetUnfolderBase]: For 40758/40766 co-relation queries the response was YES. [2025-02-08 01:19:32,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39865 conditions, 8693 events. 5373/8693 cut-off events. For 40758/40766 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 56290 event pairs, 675 based on Foata normal form. 13/8703 useless extension candidates. Maximal degree in co-relation 38540. Up to 5364 conditions per place. [2025-02-08 01:19:32,977 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 374 selfloop transitions, 254 changer transitions 2/636 dead transitions. [2025-02-08 01:19:32,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 636 transitions, 7006 flow [2025-02-08 01:19:32,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-08 01:19:32,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-02-08 01:19:32,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 498 transitions. [2025-02-08 01:19:32,979 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4573002754820937 [2025-02-08 01:19:32,979 INFO L175 Difference]: Start difference. First operand has 170 places, 396 transitions, 3931 flow. Second operand 33 states and 498 transitions. [2025-02-08 01:19:32,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 636 transitions, 7006 flow [2025-02-08 01:19:33,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 636 transitions, 6734 flow, removed 118 selfloop flow, removed 6 redundant places. [2025-02-08 01:19:33,125 INFO L231 Difference]: Finished difference. Result has 204 places, 506 transitions, 5565 flow [2025-02-08 01:19:33,126 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=3685, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5565, PETRI_PLACES=204, PETRI_TRANSITIONS=506} [2025-02-08 01:19:33,126 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 169 predicate places. [2025-02-08 01:19:33,127 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 506 transitions, 5565 flow [2025-02-08 01:19:33,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.52) internal successors, (238), 25 states have internal predecessors, (238), 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) [2025-02-08 01:19:33,127 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:19:33,127 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:19:33,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-08 01:19:33,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-02-08 01:19:33,331 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)] === [2025-02-08 01:19:33,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:19:33,331 INFO L85 PathProgramCache]: Analyzing trace with hash 39325358, now seen corresponding path program 6 times [2025-02-08 01:19:33,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:19:33,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556513232] [2025-02-08 01:19:33,332 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 01:19:33,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:19:33,337 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 2 equivalence classes. [2025-02-08 01:19:33,342 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 01:19:33,343 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-02-08 01:19:33,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:19:33,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:19:33,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556513232] [2025-02-08 01:19:33,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556513232] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:19:33,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192471879] [2025-02-08 01:19:33,459 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 01:19:33,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:19:33,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:19:33,463 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:19:33,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-08 01:19:33,502 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 2 equivalence classes. [2025-02-08 01:19:33,517 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 01:19:33,517 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-02-08 01:19:33,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:33,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 01:19:33,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:19:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:19:33,603 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:19:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:19:33,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192471879] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 01:19:33,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 01:19:33,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2025-02-08 01:19:33,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585247454] [2025-02-08 01:19:33,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 01:19:33,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-08 01:19:33,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:19:33,690 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-08 01:19:33,691 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2025-02-08 01:19:33,724 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2025-02-08 01:19:33,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 506 transitions, 5565 flow. Second operand has 20 states, 20 states have (on average 7.4) internal successors, (148), 20 states have internal predecessors, (148), 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) [2025-02-08 01:19:33,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:19:33,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2025-02-08 01:19:33,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:19:36,245 INFO L124 PetriNetUnfolderBase]: 14374/21077 cut-off events. [2025-02-08 01:19:36,246 INFO L125 PetriNetUnfolderBase]: For 122884/122884 co-relation queries the response was YES. [2025-02-08 01:19:36,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101989 conditions, 21077 events. 14374/21077 cut-off events. For 122884/122884 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 134733 event pairs, 2059 based on Foata normal form. 12/21086 useless extension candidates. Maximal degree in co-relation 100139. Up to 5962 conditions per place. [2025-02-08 01:19:36,496 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 1357 selfloop transitions, 142 changer transitions 0/1502 dead transitions. [2025-02-08 01:19:36,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 1502 transitions, 18889 flow [2025-02-08 01:19:36,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-08 01:19:36,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-02-08 01:19:36,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 314 transitions. [2025-02-08 01:19:36,499 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47575757575757577 [2025-02-08 01:19:36,499 INFO L175 Difference]: Start difference. First operand has 204 places, 506 transitions, 5565 flow. Second operand 20 states and 314 transitions. [2025-02-08 01:19:36,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 1502 transitions, 18889 flow [2025-02-08 01:19:36,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 1502 transitions, 17209 flow, removed 708 selfloop flow, removed 14 redundant places. [2025-02-08 01:19:36,955 INFO L231 Difference]: Finished difference. Result has 216 places, 600 transitions, 6351 flow [2025-02-08 01:19:36,955 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=5013, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6351, PETRI_PLACES=216, PETRI_TRANSITIONS=600} [2025-02-08 01:19:36,956 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 181 predicate places. [2025-02-08 01:19:36,957 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 600 transitions, 6351 flow [2025-02-08 01:19:36,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.4) internal successors, (148), 20 states have internal predecessors, (148), 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) [2025-02-08 01:19:36,957 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:19:36,957 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:19:36,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-08 01:19:37,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:19:37,158 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)] === [2025-02-08 01:19:37,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:19:37,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1252179964, now seen corresponding path program 7 times [2025-02-08 01:19:37,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:19:37,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361088907] [2025-02-08 01:19:37,159 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 01:19:37,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:19:37,163 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-08 01:19:37,170 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 01:19:37,170 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:19:37,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:19:37,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:19:37,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361088907] [2025-02-08 01:19:37,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361088907] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:19:37,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980399104] [2025-02-08 01:19:37,239 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 01:19:37,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:19:37,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:19:37,244 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:19:37,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-08 01:19:37,286 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-08 01:19:37,302 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 01:19:37,302 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 01:19:37,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:37,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 01:19:37,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:19:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:19:37,369 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 01:19:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:19:37,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980399104] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 01:19:37,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 01:19:37,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2025-02-08 01:19:37,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176388434] [2025-02-08 01:19:37,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:19:37,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-08 01:19:37,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:19:37,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-08 01:19:37,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2025-02-08 01:19:37,436 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-02-08 01:19:37,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 600 transitions, 6351 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:19:37,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:19:37,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-02-08 01:19:37,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 01:19:39,759 INFO L124 PetriNetUnfolderBase]: 13902/20907 cut-off events. [2025-02-08 01:19:39,760 INFO L125 PetriNetUnfolderBase]: For 148087/148812 co-relation queries the response was YES. [2025-02-08 01:19:39,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109573 conditions, 20907 events. 13902/20907 cut-off events. For 148087/148812 co-relation queries the response was YES. Maximal size of possible extension queue 1077. Compared 140305 event pairs, 2557 based on Foata normal form. 363/21120 useless extension candidates. Maximal degree in co-relation 108239. Up to 7308 conditions per place. [2025-02-08 01:19:39,926 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 783 selfloop transitions, 77 changer transitions 0/880 dead transitions. [2025-02-08 01:19:39,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 880 transitions, 10998 flow [2025-02-08 01:19:39,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 01:19:39,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 01:19:39,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2025-02-08 01:19:39,927 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2025-02-08 01:19:39,927 INFO L175 Difference]: Start difference. First operand has 216 places, 600 transitions, 6351 flow. Second operand 8 states and 144 transitions. [2025-02-08 01:19:39,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 880 transitions, 10998 flow [2025-02-08 01:19:40,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 880 transitions, 10656 flow, removed 154 selfloop flow, removed 4 redundant places. [2025-02-08 01:19:40,624 INFO L231 Difference]: Finished difference. Result has 222 places, 609 transitions, 6535 flow [2025-02-08 01:19:40,625 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6208, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6535, PETRI_PLACES=222, PETRI_TRANSITIONS=609} [2025-02-08 01:19:40,626 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 187 predicate places. [2025-02-08 01:19:40,626 INFO L471 AbstractCegarLoop]: Abstraction has has 222 places, 609 transitions, 6535 flow [2025-02-08 01:19:40,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 01:19:40,626 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 01:19:40,626 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 01:19:40,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-08 01:19:40,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:19:40,831 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)] === [2025-02-08 01:19:40,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 01:19:40,834 INFO L85 PathProgramCache]: Analyzing trace with hash 332177260, now seen corresponding path program 8 times [2025-02-08 01:19:40,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 01:19:40,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528993355] [2025-02-08 01:19:40,834 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:19:40,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 01:19:40,839 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-02-08 01:19:40,848 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 01:19:40,848 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:19:40,848 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:19:40,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 01:19:40,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528993355] [2025-02-08 01:19:40,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528993355] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 01:19:40,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842603899] [2025-02-08 01:19:40,904 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 01:19:40,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 01:19:40,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 01:19:40,906 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 01:19:40,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-08 01:19:40,948 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-02-08 01:19:40,964 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 01:19:40,965 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 01:19:40,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 01:19:40,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 01:19:40,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 01:19:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 01:19:41,046 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 01:19:41,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842603899] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 01:19:41,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 01:19:41,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 15 [2025-02-08 01:19:41,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018324244] [2025-02-08 01:19:41,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 01:19:41,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-08 01:19:41,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 01:19:41,047 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-08 01:19:41,047 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2025-02-08 01:19:41,062 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2025-02-08 01:19:41,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 609 transitions, 6535 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 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) [2025-02-08 01:19:41,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 01:19:41,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2025-02-08 01:19:41,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand