./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d2c89f010e0f73e8ba7e81bb150b82b70d39c0827c0d616dd2c3347839d51e01 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 06:45:23,218 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:45:23,271 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:45:23,274 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:45:23,275 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:45:23,296 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:45:23,297 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:45:23,297 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:45:23,297 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:45:23,297 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:45:23,297 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:45:23,297 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:45:23,298 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:45:23,298 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:45:23,298 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:45:23,298 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:45:23,298 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:45:23,298 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:45:23,298 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:45:23,298 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:45:23,298 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:45:23,299 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:45:23,299 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:45:23,299 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:45:23,299 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:45:23,299 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:45:23,299 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:45:23,299 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:45:23,299 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:45:23,299 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:45:23,299 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:45:23,299 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:45:23,299 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:45:23,300 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:45:23,300 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:45:23,300 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:45:23,300 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:45:23,300 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:45:23,300 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:45:23,301 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:45:23,301 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:45:23,301 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:45:23,301 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:45:23,301 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2c89f010e0f73e8ba7e81bb150b82b70d39c0827c0d616dd2c3347839d51e01 [2025-03-17 06:45:23,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:45:23,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:45:23,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:45:23,552 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:45:23,553 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:45:23,555 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2025-03-17 06:45:24,749 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16cf6a50b/104c30a9b22744da91bf2dfa95d636ce/FLAGe31f0bac8 [2025-03-17 06:45:24,973 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:45:24,975 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2025-03-17 06:45:24,995 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16cf6a50b/104c30a9b22744da91bf2dfa95d636ce/FLAGe31f0bac8 [2025-03-17 06:45:25,018 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16cf6a50b/104c30a9b22744da91bf2dfa95d636ce [2025-03-17 06:45:25,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:45:25,022 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:45:25,024 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:45:25,025 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:45:25,033 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:45:25,034 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:45:25" (1/1) ... [2025-03-17 06:45:25,035 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4017ef47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:25, skipping insertion in model container [2025-03-17 06:45:25,035 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:45:25" (1/1) ... [2025-03-17 06:45:25,051 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:45:25,172 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3451,3464] [2025-03-17 06:45:25,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:45:25,191 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:45:25,213 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3451,3464] [2025-03-17 06:45:25,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:45:25,231 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:45:25,232 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:25 WrapperNode [2025-03-17 06:45:25,232 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:45:25,233 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:45:25,233 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:45:25,233 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:45:25,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:25" (1/1) ... [2025-03-17 06:45:25,247 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:25" (1/1) ... [2025-03-17 06:45:25,269 INFO L138 Inliner]: procedures = 24, calls = 40, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 224 [2025-03-17 06:45:25,269 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:45:25,270 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:45:25,270 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:45:25,270 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:45:25,278 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:25" (1/1) ... [2025-03-17 06:45:25,278 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:25" (1/1) ... [2025-03-17 06:45:25,280 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:25" (1/1) ... [2025-03-17 06:45:25,295 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 2 writes are split as follows [0, 2]. [2025-03-17 06:45:25,296 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:25" (1/1) ... [2025-03-17 06:45:25,297 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:25" (1/1) ... [2025-03-17 06:45:25,304 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:25" (1/1) ... [2025-03-17 06:45:25,307 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:25" (1/1) ... [2025-03-17 06:45:25,308 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:25" (1/1) ... [2025-03-17 06:45:25,309 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:25" (1/1) ... [2025-03-17 06:45:25,312 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:45:25,314 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:45:25,314 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:45:25,314 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:45:25,315 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:25" (1/1) ... [2025-03-17 06:45:25,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:45:25,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:45:25,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 06:45:25,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 06:45:25,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:45:25,361 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 06:45:25,361 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 06:45:25,362 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 06:45:25,362 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 06:45:25,362 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 06:45:25,362 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 06:45:25,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:45:25,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 06:45:25,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 06:45:25,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 06:45:25,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 06:45:25,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 06:45:25,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 06:45:25,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:45:25,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:45:25,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 06:45:25,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 06:45:25,364 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 06:45:25,460 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:45:25,462 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:45:25,818 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:45:25,818 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:45:26,035 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:45:26,036 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:45:26,036 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:45:26 BoogieIcfgContainer [2025-03-17 06:45:26,036 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:45:26,038 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:45:26,038 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:45:26,041 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:45:26,041 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:45:25" (1/3) ... [2025-03-17 06:45:26,041 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:45:26, skipping insertion in model container [2025-03-17 06:45:26,041 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:45:25" (2/3) ... [2025-03-17 06:45:26,041 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:45:26, skipping insertion in model container [2025-03-17 06:45:26,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:45:26" (3/3) ... [2025-03-17 06:45:26,042 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2025-03-17 06:45:26,054 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:45:26,055 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-queue-add-3.wvr.c that has 4 procedures, 36 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2025-03-17 06:45:26,055 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:45:26,113 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-17 06:45:26,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 42 transitions, 105 flow [2025-03-17 06:45:26,177 INFO L124 PetriNetUnfolderBase]: 7/39 cut-off events. [2025-03-17 06:45:26,179 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 06:45:26,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 39 events. 7/39 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 59 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2025-03-17 06:45:26,182 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 42 transitions, 105 flow [2025-03-17 06:45:26,184 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 38 transitions, 94 flow [2025-03-17 06:45:26,189 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:45:26,197 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;@778b34d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:45:26,198 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-17 06:45:26,208 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:45:26,208 INFO L124 PetriNetUnfolderBase]: 7/37 cut-off events. [2025-03-17 06:45:26,208 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 06:45:26,209 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:26,209 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:26,209 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:45:26,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:26,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1673135348, now seen corresponding path program 1 times [2025-03-17 06:45:26,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:26,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926518829] [2025-03-17 06:45:26,225 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:26,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:26,287 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 06:45:26,326 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:45:26,328 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:26,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:26,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:26,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926518829] [2025-03-17 06:45:26,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926518829] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:45:26,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:45:26,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:45:26,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076361848] [2025-03-17 06:45:26,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:45:26,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-17 06:45:26,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:26,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-17 06:45:26,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 06:45:26,434 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2025-03-17 06:45:26,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 94 flow. Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:26,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:26,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2025-03-17 06:45:26,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:26,684 INFO L124 PetriNetUnfolderBase]: 727/1226 cut-off events. [2025-03-17 06:45:26,684 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2025-03-17 06:45:26,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2320 conditions, 1226 events. 727/1226 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5773 event pairs, 595 based on Foata normal form. 0/1115 useless extension candidates. Maximal degree in co-relation 2155. Up to 991 conditions per place. [2025-03-17 06:45:26,695 INFO L140 encePairwiseOnDemand]: 40/42 looper letters, 28 selfloop transitions, 0 changer transitions 0/36 dead transitions. [2025-03-17 06:45:26,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 36 transitions, 146 flow [2025-03-17 06:45:26,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-17 06:45:26,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-03-17 06:45:26,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 52 transitions. [2025-03-17 06:45:26,708 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2025-03-17 06:45:26,709 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 94 flow. Second operand 2 states and 52 transitions. [2025-03-17 06:45:26,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 36 transitions, 146 flow [2025-03-17 06:45:26,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 36 transitions, 134 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 06:45:26,720 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 78 flow [2025-03-17 06:45:26,722 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2025-03-17 06:45:26,726 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -5 predicate places. [2025-03-17 06:45:26,726 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 78 flow [2025-03-17 06:45:26,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:26,726 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:26,726 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:26,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:45:26,726 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:45:26,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:26,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1707354277, now seen corresponding path program 1 times [2025-03-17 06:45:26,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:26,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99460617] [2025-03-17 06:45:26,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:26,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:26,745 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 06:45:26,784 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 06:45:26,785 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:26,785 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:27,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:27,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99460617] [2025-03-17 06:45:27,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99460617] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:45:27,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:45:27,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:45:27,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335706515] [2025-03-17 06:45:27,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:45:27,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:45:27,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:27,020 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:45:27,020 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 06:45:27,020 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2025-03-17 06:45:27,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:27,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:27,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2025-03-17 06:45:27,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:27,255 INFO L124 PetriNetUnfolderBase]: 828/1422 cut-off events. [2025-03-17 06:45:27,255 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-03-17 06:45:27,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2621 conditions, 1422 events. 828/1422 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6926 event pairs, 682 based on Foata normal form. 73/1369 useless extension candidates. Maximal degree in co-relation 2618. Up to 991 conditions per place. [2025-03-17 06:45:27,266 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 27 selfloop transitions, 2 changer transitions 17/54 dead transitions. [2025-03-17 06:45:27,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 54 transitions, 209 flow [2025-03-17 06:45:27,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:45:27,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:45:27,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2025-03-17 06:45:27,267 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2025-03-17 06:45:27,268 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 78 flow. Second operand 5 states and 104 transitions. [2025-03-17 06:45:27,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 54 transitions, 209 flow [2025-03-17 06:45:27,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 209 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 06:45:27,270 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 100 flow [2025-03-17 06:45:27,270 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2025-03-17 06:45:27,270 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2025-03-17 06:45:27,272 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 100 flow [2025-03-17 06:45:27,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:27,272 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:27,273 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:27,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 06:45:27,274 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:45:27,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:27,274 INFO L85 PathProgramCache]: Analyzing trace with hash 435427510, now seen corresponding path program 1 times [2025-03-17 06:45:27,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:27,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995970761] [2025-03-17 06:45:27,275 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:27,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:27,288 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-17 06:45:27,308 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 06:45:27,309 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:27,309 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:45:27,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:27,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995970761] [2025-03-17 06:45:27,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995970761] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:45:27,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:45:27,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:45:27,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549602113] [2025-03-17 06:45:27,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:45:27,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:45:27,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:27,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:45:27,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 06:45:27,467 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2025-03-17 06:45:27,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:27,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:27,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2025-03-17 06:45:27,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:27,647 INFO L124 PetriNetUnfolderBase]: 927/1556 cut-off events. [2025-03-17 06:45:27,648 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2025-03-17 06:45:27,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3199 conditions, 1556 events. 927/1556 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7538 event pairs, 775 based on Foata normal form. 77/1520 useless extension candidates. Maximal degree in co-relation 3192. Up to 992 conditions per place. [2025-03-17 06:45:27,655 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 28 selfloop transitions, 2 changer transitions 17/55 dead transitions. [2025-03-17 06:45:27,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 244 flow [2025-03-17 06:45:27,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 06:45:27,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 06:45:27,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2025-03-17 06:45:27,656 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2025-03-17 06:45:27,656 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 100 flow. Second operand 4 states and 92 transitions. [2025-03-17 06:45:27,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 244 flow [2025-03-17 06:45:27,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 232 flow, removed 5 selfloop flow, removed 2 redundant places. [2025-03-17 06:45:27,657 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 108 flow [2025-03-17 06:45:27,658 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2025-03-17 06:45:27,658 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2025-03-17 06:45:27,658 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 108 flow [2025-03-17 06:45:27,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:27,658 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:27,658 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:27,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 06:45:27,659 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:45:27,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:27,659 INFO L85 PathProgramCache]: Analyzing trace with hash 582889714, now seen corresponding path program 1 times [2025-03-17 06:45:27,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:27,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461600915] [2025-03-17 06:45:27,659 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:27,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:27,675 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-17 06:45:27,695 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 06:45:27,696 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:27,696 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:45:27,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:27,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461600915] [2025-03-17 06:45:27,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461600915] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:45:27,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:45:27,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 06:45:27,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88437195] [2025-03-17 06:45:27,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:45:27,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:45:27,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:27,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:45:27,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:45:27,958 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2025-03-17 06:45:27,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 108 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:27,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:27,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2025-03-17 06:45:27,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:28,368 INFO L124 PetriNetUnfolderBase]: 1853/2860 cut-off events. [2025-03-17 06:45:28,368 INFO L125 PetriNetUnfolderBase]: For 685/685 co-relation queries the response was YES. [2025-03-17 06:45:28,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6498 conditions, 2860 events. 1853/2860 cut-off events. For 685/685 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14944 event pairs, 494 based on Foata normal form. 1/2821 useless extension candidates. Maximal degree in co-relation 6490. Up to 981 conditions per place. [2025-03-17 06:45:28,387 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 87 selfloop transitions, 10 changer transitions 3/106 dead transitions. [2025-03-17 06:45:28,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 106 transitions, 497 flow [2025-03-17 06:45:28,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:45:28,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:45:28,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2025-03-17 06:45:28,390 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2025-03-17 06:45:28,390 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 108 flow. Second operand 8 states and 171 transitions. [2025-03-17 06:45:28,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 106 transitions, 497 flow [2025-03-17 06:45:28,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 106 transitions, 493 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-17 06:45:28,393 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 168 flow [2025-03-17 06:45:28,393 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2025-03-17 06:45:28,394 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2025-03-17 06:45:28,394 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 168 flow [2025-03-17 06:45:28,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:28,394 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:28,394 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:28,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 06:45:28,394 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:45:28,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:28,395 INFO L85 PathProgramCache]: Analyzing trace with hash 721665780, now seen corresponding path program 2 times [2025-03-17 06:45:28,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:28,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640730718] [2025-03-17 06:45:28,395 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:45:28,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:28,406 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-03-17 06:45:28,414 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 29 of 31 statements. [2025-03-17 06:45:28,415 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:45:28,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:28,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:45:28,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:28,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640730718] [2025-03-17 06:45:28,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640730718] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:45:28,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:45:28,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:45:28,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206566845] [2025-03-17 06:45:28,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:45:28,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:45:28,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:28,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:45:28,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:45:28,482 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2025-03-17 06:45:28,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:28,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:28,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2025-03-17 06:45:28,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:28,671 INFO L124 PetriNetUnfolderBase]: 1428/2347 cut-off events. [2025-03-17 06:45:28,673 INFO L125 PetriNetUnfolderBase]: For 1224/1358 co-relation queries the response was YES. [2025-03-17 06:45:28,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5734 conditions, 2347 events. 1428/2347 cut-off events. For 1224/1358 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12480 event pairs, 379 based on Foata normal form. 56/2246 useless extension candidates. Maximal degree in co-relation 5722. Up to 1747 conditions per place. [2025-03-17 06:45:28,690 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 44 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2025-03-17 06:45:28,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 305 flow [2025-03-17 06:45:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:45:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:45:28,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2025-03-17 06:45:28,692 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2025-03-17 06:45:28,692 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 168 flow. Second operand 3 states and 74 transitions. [2025-03-17 06:45:28,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 305 flow [2025-03-17 06:45:28,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 59 transitions, 303 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:45:28,698 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 189 flow [2025-03-17 06:45:28,698 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2025-03-17 06:45:28,698 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2025-03-17 06:45:28,699 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 189 flow [2025-03-17 06:45:28,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:28,699 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:28,699 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:28,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 06:45:28,699 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:45:28,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:28,699 INFO L85 PathProgramCache]: Analyzing trace with hash 298182488, now seen corresponding path program 3 times [2025-03-17 06:45:28,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:28,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116322386] [2025-03-17 06:45:28,699 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:45:28,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:28,709 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 31 statements into 2 equivalence classes. [2025-03-17 06:45:28,713 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 29 of 31 statements. [2025-03-17 06:45:28,713 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 06:45:28,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:45:28,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:28,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116322386] [2025-03-17 06:45:28,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116322386] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:45:28,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:45:28,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:45:28,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812088487] [2025-03-17 06:45:28,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:45:28,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:45:28,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:28,758 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:45:28,758 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:45:28,758 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2025-03-17 06:45:28,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:28,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:28,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2025-03-17 06:45:28,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:28,939 INFO L124 PetriNetUnfolderBase]: 1053/1886 cut-off events. [2025-03-17 06:45:28,940 INFO L125 PetriNetUnfolderBase]: For 1484/1484 co-relation queries the response was YES. [2025-03-17 06:45:28,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4945 conditions, 1886 events. 1053/1886 cut-off events. For 1484/1484 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10257 event pairs, 400 based on Foata normal form. 66/1859 useless extension candidates. Maximal degree in co-relation 4931. Up to 991 conditions per place. [2025-03-17 06:45:28,951 INFO L140 encePairwiseOnDemand]: 39/42 looper letters, 46 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2025-03-17 06:45:28,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 331 flow [2025-03-17 06:45:28,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:45:28,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:45:28,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2025-03-17 06:45:28,953 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2025-03-17 06:45:28,953 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 189 flow. Second operand 3 states and 74 transitions. [2025-03-17 06:45:28,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 331 flow [2025-03-17 06:45:28,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 307 flow, removed 8 selfloop flow, removed 3 redundant places. [2025-03-17 06:45:28,960 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 182 flow [2025-03-17 06:45:28,960 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2025-03-17 06:45:28,961 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2025-03-17 06:45:28,961 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 182 flow [2025-03-17 06:45:28,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:28,962 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:28,962 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:28,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 06:45:28,962 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:45:28,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:28,963 INFO L85 PathProgramCache]: Analyzing trace with hash 907495891, now seen corresponding path program 1 times [2025-03-17 06:45:28,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:28,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521167517] [2025-03-17 06:45:28,963 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:28,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:28,973 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-17 06:45:28,985 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-17 06:45:28,986 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:28,986 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:45:29,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:29,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521167517] [2025-03-17 06:45:29,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521167517] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:45:29,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216641892] [2025-03-17 06:45:29,123 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:29,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:29,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:45:29,125 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:45:29,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 06:45:29,184 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-17 06:45:29,209 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-17 06:45:29,209 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:29,209 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:29,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 06:45:29,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:45:29,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:45:29,324 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:45:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:45:29,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216641892] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:45:29,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:45:29,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-17 06:45:29,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466397278] [2025-03-17 06:45:29,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:45:29,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 06:45:29,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:29,431 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 06:45:29,431 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2025-03-17 06:45:29,431 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2025-03-17 06:45:29,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 182 flow. Second operand has 12 states, 12 states have (on average 15.5) internal successors, (186), 12 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:29,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:29,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2025-03-17 06:45:29,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:29,765 INFO L124 PetriNetUnfolderBase]: 1723/3166 cut-off events. [2025-03-17 06:45:29,765 INFO L125 PetriNetUnfolderBase]: For 2038/2038 co-relation queries the response was YES. [2025-03-17 06:45:29,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8184 conditions, 3166 events. 1723/3166 cut-off events. For 2038/2038 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19741 event pairs, 1086 based on Foata normal form. 112/3125 useless extension candidates. Maximal degree in co-relation 8171. Up to 1536 conditions per place. [2025-03-17 06:45:29,782 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 65 selfloop transitions, 6 changer transitions 4/87 dead transitions. [2025-03-17 06:45:29,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 87 transitions, 470 flow [2025-03-17 06:45:29,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:45:29,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:45:29,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2025-03-17 06:45:29,784 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2025-03-17 06:45:29,784 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 182 flow. Second operand 7 states and 143 transitions. [2025-03-17 06:45:29,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 87 transitions, 470 flow [2025-03-17 06:45:29,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 87 transitions, 463 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-03-17 06:45:29,789 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 231 flow [2025-03-17 06:45:29,789 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=231, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2025-03-17 06:45:29,789 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2025-03-17 06:45:29,789 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 231 flow [2025-03-17 06:45:29,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.5) internal successors, (186), 12 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:29,790 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:29,790 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:29,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 06:45:29,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:29,991 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:45:29,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:29,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2044300177, now seen corresponding path program 1 times [2025-03-17 06:45:29,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:29,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832191580] [2025-03-17 06:45:29,992 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:29,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:30,006 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-17 06:45:30,015 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-17 06:45:30,015 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:30,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:45:30,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:30,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832191580] [2025-03-17 06:45:30,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832191580] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:45:30,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231805810] [2025-03-17 06:45:30,146 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:30,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:30,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:45:30,149 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:45:30,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 06:45:30,203 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-17 06:45:30,231 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-17 06:45:30,231 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:30,232 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:30,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 06:45:30,235 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:45:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:45:30,282 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:45:30,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231805810] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:45:30,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:45:30,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2025-03-17 06:45:30,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250876133] [2025-03-17 06:45:30,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:45:30,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:45:30,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:30,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:45:30,284 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:45:30,284 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2025-03-17 06:45:30,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 231 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:30,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:30,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2025-03-17 06:45:30,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:30,753 INFO L124 PetriNetUnfolderBase]: 2733/5167 cut-off events. [2025-03-17 06:45:30,753 INFO L125 PetriNetUnfolderBase]: For 4076/4276 co-relation queries the response was YES. [2025-03-17 06:45:30,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13043 conditions, 5167 events. 2733/5167 cut-off events. For 4076/4276 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 35754 event pairs, 794 based on Foata normal form. 132/5030 useless extension candidates. Maximal degree in co-relation 13026. Up to 1449 conditions per place. [2025-03-17 06:45:30,782 INFO L140 encePairwiseOnDemand]: 39/42 looper letters, 72 selfloop transitions, 6 changer transitions 0/90 dead transitions. [2025-03-17 06:45:30,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 90 transitions, 528 flow [2025-03-17 06:45:30,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 06:45:30,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 06:45:30,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2025-03-17 06:45:30,784 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2025-03-17 06:45:30,784 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 231 flow. Second operand 4 states and 108 transitions. [2025-03-17 06:45:30,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 90 transitions, 528 flow [2025-03-17 06:45:30,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 505 flow, removed 9 selfloop flow, removed 3 redundant places. [2025-03-17 06:45:30,793 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 275 flow [2025-03-17 06:45:30,793 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=275, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2025-03-17 06:45:30,794 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2025-03-17 06:45:30,794 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 275 flow [2025-03-17 06:45:30,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:30,794 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:30,794 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:30,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 06:45:30,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-03-17 06:45:30,996 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:45:30,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:30,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1429865120, now seen corresponding path program 2 times [2025-03-17 06:45:30,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:30,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127623894] [2025-03-17 06:45:30,997 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:45:30,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:31,012 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-03-17 06:45:31,046 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 32 of 35 statements. [2025-03-17 06:45:31,047 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:45:31,047 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 06:45:31,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:31,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127623894] [2025-03-17 06:45:31,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127623894] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:45:31,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:45:31,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:45:31,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104035136] [2025-03-17 06:45:31,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:45:31,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:45:31,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:31,178 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:45:31,178 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-17 06:45:31,185 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2025-03-17 06:45:31,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 275 flow. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:31,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:31,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2025-03-17 06:45:31,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:31,724 INFO L124 PetriNetUnfolderBase]: 3950/6849 cut-off events. [2025-03-17 06:45:31,724 INFO L125 PetriNetUnfolderBase]: For 9707/10044 co-relation queries the response was YES. [2025-03-17 06:45:31,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19149 conditions, 6849 events. 3950/6849 cut-off events. For 9707/10044 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 45080 event pairs, 986 based on Foata normal form. 68/6593 useless extension candidates. Maximal degree in co-relation 19131. Up to 4060 conditions per place. [2025-03-17 06:45:31,761 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 78 selfloop transitions, 9 changer transitions 0/97 dead transitions. [2025-03-17 06:45:31,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 97 transitions, 608 flow [2025-03-17 06:45:31,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:45:31,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:45:31,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2025-03-17 06:45:31,763 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2025-03-17 06:45:31,763 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 275 flow. Second operand 6 states and 124 transitions. [2025-03-17 06:45:31,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 97 transitions, 608 flow [2025-03-17 06:45:31,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 97 transitions, 590 flow, removed 9 selfloop flow, removed 0 redundant places. [2025-03-17 06:45:31,773 INFO L231 Difference]: Finished difference. Result has 73 places, 59 transitions, 305 flow [2025-03-17 06:45:31,773 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=73, PETRI_TRANSITIONS=59} [2025-03-17 06:45:31,775 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2025-03-17 06:45:31,775 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 59 transitions, 305 flow [2025-03-17 06:45:31,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:31,776 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:31,776 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:31,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 06:45:31,776 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:45:31,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:31,777 INFO L85 PathProgramCache]: Analyzing trace with hash -253059641, now seen corresponding path program 1 times [2025-03-17 06:45:31,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:31,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114060496] [2025-03-17 06:45:31,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:31,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:31,788 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-17 06:45:31,801 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-17 06:45:31,801 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:31,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:45:31,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:31,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114060496] [2025-03-17 06:45:31,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114060496] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:45:31,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656411538] [2025-03-17 06:45:31,910 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:31,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:31,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:45:31,912 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:45:31,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 06:45:31,964 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-17 06:45:31,988 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-17 06:45:31,988 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:31,988 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:31,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 06:45:31,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:45:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 06:45:32,029 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:45:32,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656411538] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:45:32,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:45:32,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2025-03-17 06:45:32,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238771512] [2025-03-17 06:45:32,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:45:32,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:45:32,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:32,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:45:32,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-17 06:45:32,031 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2025-03-17 06:45:32,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 59 transitions, 305 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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) [2025-03-17 06:45:32,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:32,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2025-03-17 06:45:32,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:32,499 INFO L124 PetriNetUnfolderBase]: 3789/6884 cut-off events. [2025-03-17 06:45:32,500 INFO L125 PetriNetUnfolderBase]: For 9770/10346 co-relation queries the response was YES. [2025-03-17 06:45:32,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19677 conditions, 6884 events. 3789/6884 cut-off events. For 9770/10346 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 47627 event pairs, 1135 based on Foata normal form. 381/7129 useless extension candidates. Maximal degree in co-relation 19657. Up to 1972 conditions per place. [2025-03-17 06:45:32,537 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 81 selfloop transitions, 8 changer transitions 8/108 dead transitions. [2025-03-17 06:45:32,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 108 transitions, 695 flow [2025-03-17 06:45:32,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 06:45:32,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 06:45:32,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2025-03-17 06:45:32,538 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2025-03-17 06:45:32,538 INFO L175 Difference]: Start difference. First operand has 73 places, 59 transitions, 305 flow. Second operand 4 states and 114 transitions. [2025-03-17 06:45:32,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 108 transitions, 695 flow [2025-03-17 06:45:32,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 108 transitions, 676 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-03-17 06:45:32,551 INFO L231 Difference]: Finished difference. Result has 75 places, 55 transitions, 287 flow [2025-03-17 06:45:32,551 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=287, PETRI_PLACES=75, PETRI_TRANSITIONS=55} [2025-03-17 06:45:32,551 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2025-03-17 06:45:32,551 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 55 transitions, 287 flow [2025-03-17 06:45:32,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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) [2025-03-17 06:45:32,552 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:32,552 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:32,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-17 06:45:32,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:32,756 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:45:32,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:32,758 INFO L85 PathProgramCache]: Analyzing trace with hash 775879394, now seen corresponding path program 1 times [2025-03-17 06:45:32,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:32,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454001726] [2025-03-17 06:45:32,759 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:32,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:32,768 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-17 06:45:32,777 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-17 06:45:32,777 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:32,777 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:45:32,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:32,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454001726] [2025-03-17 06:45:32,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454001726] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:45:32,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009787571] [2025-03-17 06:45:32,897 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:45:32,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:32,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:45:32,900 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:45:32,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 06:45:32,950 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-17 06:45:32,975 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-17 06:45:32,975 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:45:32,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:32,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 06:45:32,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:45:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:45:33,064 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:45:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:45:33,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009787571] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:45:33,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:45:33,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-03-17 06:45:33,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891914675] [2025-03-17 06:45:33,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:45:33,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 06:45:33,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:33,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 06:45:33,175 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-03-17 06:45:33,176 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2025-03-17 06:45:33,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 55 transitions, 287 flow. Second operand has 12 states, 12 states have (on average 15.333333333333334) internal successors, (184), 12 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:33,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:33,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2025-03-17 06:45:33,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:33,886 INFO L124 PetriNetUnfolderBase]: 4258/8206 cut-off events. [2025-03-17 06:45:33,886 INFO L125 PetriNetUnfolderBase]: For 14732/15079 co-relation queries the response was YES. [2025-03-17 06:45:33,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25007 conditions, 8206 events. 4258/8206 cut-off events. For 14732/15079 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 60892 event pairs, 2864 based on Foata normal form. 206/8261 useless extension candidates. Maximal degree in co-relation 24985. Up to 4848 conditions per place. [2025-03-17 06:45:33,926 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 42 selfloop transitions, 3 changer transitions 44/100 dead transitions. [2025-03-17 06:45:33,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 100 transitions, 703 flow [2025-03-17 06:45:33,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:45:33,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:45:33,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2025-03-17 06:45:33,928 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2025-03-17 06:45:33,928 INFO L175 Difference]: Start difference. First operand has 75 places, 55 transitions, 287 flow. Second operand 6 states and 128 transitions. [2025-03-17 06:45:33,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 100 transitions, 703 flow [2025-03-17 06:45:33,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 100 transitions, 665 flow, removed 19 selfloop flow, removed 4 redundant places. [2025-03-17 06:45:33,938 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 289 flow [2025-03-17 06:45:33,939 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=289, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2025-03-17 06:45:33,939 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2025-03-17 06:45:33,939 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 289 flow [2025-03-17 06:45:33,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.333333333333334) internal successors, (184), 12 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:33,939 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:33,940 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:33,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 06:45:34,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:34,141 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:45:34,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:34,141 INFO L85 PathProgramCache]: Analyzing trace with hash 986409102, now seen corresponding path program 2 times [2025-03-17 06:45:34,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:34,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374108674] [2025-03-17 06:45:34,141 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:45:34,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:34,151 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-03-17 06:45:34,180 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-03-17 06:45:34,181 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:45:34,181 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:45:35,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:35,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374108674] [2025-03-17 06:45:35,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374108674] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:45:35,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107797403] [2025-03-17 06:45:35,239 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:45:35,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:35,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:45:35,242 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:45:35,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 06:45:35,298 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-03-17 06:45:35,326 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-03-17 06:45:35,327 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:45:35,327 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:35,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-17 06:45:35,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:45:35,667 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:45:35,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2025-03-17 06:45:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:45:35,778 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:45:35,967 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-17 06:45:35,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2025-03-17 06:45:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:45:36,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107797403] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:45:36,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:45:36,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 33 [2025-03-17 06:45:36,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830486537] [2025-03-17 06:45:36,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:45:36,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-17 06:45:36,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:36,415 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-17 06:45:36,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2025-03-17 06:45:36,492 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2025-03-17 06:45:36,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 289 flow. Second operand has 34 states, 34 states have (on average 9.735294117647058) internal successors, (331), 34 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:36,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:36,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2025-03-17 06:45:36,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:43,467 INFO L124 PetriNetUnfolderBase]: 37300/57006 cut-off events. [2025-03-17 06:45:43,467 INFO L125 PetriNetUnfolderBase]: For 76412/76412 co-relation queries the response was YES. [2025-03-17 06:45:43,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165915 conditions, 57006 events. 37300/57006 cut-off events. For 76412/76412 co-relation queries the response was YES. Maximal size of possible extension queue 2204. Compared 429342 event pairs, 3032 based on Foata normal form. 935/53333 useless extension candidates. Maximal degree in co-relation 165893. Up to 6911 conditions per place. [2025-03-17 06:45:43,931 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 717 selfloop transitions, 112 changer transitions 30/865 dead transitions. [2025-03-17 06:45:43,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 865 transitions, 5810 flow [2025-03-17 06:45:43,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2025-03-17 06:45:43,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2025-03-17 06:45:43,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 1068 transitions. [2025-03-17 06:45:43,935 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44611528822055135 [2025-03-17 06:45:43,935 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 289 flow. Second operand 57 states and 1068 transitions. [2025-03-17 06:45:43,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 865 transitions, 5810 flow [2025-03-17 06:45:44,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 865 transitions, 5762 flow, removed 20 selfloop flow, removed 4 redundant places. [2025-03-17 06:45:44,017 INFO L231 Difference]: Finished difference. Result has 159 places, 170 transitions, 1530 flow [2025-03-17 06:45:44,017 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1530, PETRI_PLACES=159, PETRI_TRANSITIONS=170} [2025-03-17 06:45:44,019 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2025-03-17 06:45:44,020 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 170 transitions, 1530 flow [2025-03-17 06:45:44,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 9.735294117647058) internal successors, (331), 34 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:44,020 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:44,020 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:44,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-17 06:45:44,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-17 06:45:44,225 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:45:44,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:44,226 INFO L85 PathProgramCache]: Analyzing trace with hash 96930824, now seen corresponding path program 3 times [2025-03-17 06:45:44,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:44,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972485997] [2025-03-17 06:45:44,226 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:45:44,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:44,241 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 40 statements into 2 equivalence classes. [2025-03-17 06:45:44,282 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-03-17 06:45:44,282 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:45:44,282 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 06:45:44,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:44,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972485997] [2025-03-17 06:45:44,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972485997] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:45:44,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064486214] [2025-03-17 06:45:44,800 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:45:44,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:44,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:45:44,802 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:45:44,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 06:45:44,859 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 40 statements into 2 equivalence classes. [2025-03-17 06:45:44,886 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-03-17 06:45:44,887 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:45:44,887 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:44,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-17 06:45:44,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:45:45,182 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-17 06:45:45,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2025-03-17 06:45:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 06:45:45,188 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:45:45,328 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-17 06:45:45,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2025-03-17 06:45:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 06:45:45,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064486214] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:45:45,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:45:45,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2025-03-17 06:45:45,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250782619] [2025-03-17 06:45:45,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:45:45,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-17 06:45:45,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:45,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-17 06:45:45,564 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2025-03-17 06:45:45,617 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2025-03-17 06:45:45,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 170 transitions, 1530 flow. Second operand has 27 states, 27 states have (on average 10.407407407407407) internal successors, (281), 27 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:45,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:45:45,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2025-03-17 06:45:45,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:45:53,396 INFO L124 PetriNetUnfolderBase]: 40465/61906 cut-off events. [2025-03-17 06:45:53,396 INFO L125 PetriNetUnfolderBase]: For 691496/691563 co-relation queries the response was YES. [2025-03-17 06:45:54,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296748 conditions, 61906 events. 40465/61906 cut-off events. For 691496/691563 co-relation queries the response was YES. Maximal size of possible extension queue 2268. Compared 468171 event pairs, 5916 based on Foata normal form. 1279/62917 useless extension candidates. Maximal degree in co-relation 296693. Up to 10188 conditions per place. [2025-03-17 06:45:54,323 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 415 selfloop transitions, 125 changer transitions 20/566 dead transitions. [2025-03-17 06:45:54,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 566 transitions, 5548 flow [2025-03-17 06:45:54,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-17 06:45:54,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-17 06:45:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 515 transitions. [2025-03-17 06:45:54,327 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4716117216117216 [2025-03-17 06:45:54,327 INFO L175 Difference]: Start difference. First operand has 159 places, 170 transitions, 1530 flow. Second operand 26 states and 515 transitions. [2025-03-17 06:45:54,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 566 transitions, 5548 flow [2025-03-17 06:45:57,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 566 transitions, 5274 flow, removed 121 selfloop flow, removed 10 redundant places. [2025-03-17 06:45:57,616 INFO L231 Difference]: Finished difference. Result has 189 places, 204 transitions, 2306 flow [2025-03-17 06:45:57,616 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2306, PETRI_PLACES=189, PETRI_TRANSITIONS=204} [2025-03-17 06:45:57,617 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 148 predicate places. [2025-03-17 06:45:57,617 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 204 transitions, 2306 flow [2025-03-17 06:45:57,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 10.407407407407407) internal successors, (281), 27 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:45:57,617 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:45:57,617 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:45:57,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 06:45:57,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:57,818 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-17 06:45:57,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:45:57,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1565743046, now seen corresponding path program 4 times [2025-03-17 06:45:57,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:45:57,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260492694] [2025-03-17 06:45:57,820 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:45:57,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:45:57,828 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-03-17 06:45:57,845 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-03-17 06:45:57,845 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:45:57,845 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:45:58,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:45:58,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260492694] [2025-03-17 06:45:58,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260492694] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:45:58,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798864186] [2025-03-17 06:45:58,179 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:45:58,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:45:58,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:45:58,181 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:45:58,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 06:45:58,238 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-03-17 06:45:58,270 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-03-17 06:45:58,270 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:45:58,270 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:45:58,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-17 06:45:58,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:45:58,978 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2025-03-17 06:45:58,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 7 [2025-03-17 06:45:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:45:59,050 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:45:59,557 INFO L349 Elim1Store]: treesize reduction 23, result has 75.3 percent of original size [2025-03-17 06:45:59,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 82 [2025-03-17 06:45:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 06:45:59,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798864186] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:45:59,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:45:59,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 14] total 37 [2025-03-17 06:45:59,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864917654] [2025-03-17 06:45:59,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:45:59,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-17 06:45:59,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:45:59,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-17 06:45:59,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1197, Unknown=0, NotChecked=0, Total=1406 [2025-03-17 06:46:00,048 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2025-03-17 06:46:00,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 204 transitions, 2306 flow. Second operand has 38 states, 38 states have (on average 8.552631578947368) internal successors, (325), 38 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:46:00,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:46:00,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2025-03-17 06:46:00,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:46:07,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]