./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-min-max-dec.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 47814a6c2066a31334f0b50a42e69cfeb567d5dd7f02dc6c703588c90e067366 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:34:29,114 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:34:29,164 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:34:29,167 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:34:29,168 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:34:29,182 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:34:29,183 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:34:29,183 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:34:29,183 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:34:29,183 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:34:29,184 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:34:29,184 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:34:29,184 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:34:29,184 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:34:29,184 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:34:29,184 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:34:29,184 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:34:29,184 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:34:29,184 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:34:29,184 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:34:29,184 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:34:29,184 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:34:29,184 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:34:29,184 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:34:29,184 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:34:29,184 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:34:29,184 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:34:29,185 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:34:29,185 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:34:29,185 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:34:29,185 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:34:29,185 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:34:29,185 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:34:29,185 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:34:29,185 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:34:29,185 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:34:29,185 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:34:29,185 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:34:29,185 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:34:29,185 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:34:29,185 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:34:29,185 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:34:29,185 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:34:29,185 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 -> 47814a6c2066a31334f0b50a42e69cfeb567d5dd7f02dc6c703588c90e067366 [2025-03-08 17:34:29,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:34:29,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:34:29,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:34:29,397 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:34:29,397 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:34:29,398 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2025-03-08 17:34:30,509 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da67159fa/e37d5f2b73b34112b06f761d1665b6c0/FLAG22bd4ad9a [2025-03-08 17:34:30,732 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:34:30,733 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2025-03-08 17:34:30,739 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da67159fa/e37d5f2b73b34112b06f761d1665b6c0/FLAG22bd4ad9a [2025-03-08 17:34:31,081 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da67159fa/e37d5f2b73b34112b06f761d1665b6c0 [2025-03-08 17:34:31,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:34:31,085 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:34:31,086 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:34:31,086 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:34:31,089 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:34:31,089 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:34:31" (1/1) ... [2025-03-08 17:34:31,090 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f523d3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:31, skipping insertion in model container [2025-03-08 17:34:31,090 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:34:31" (1/1) ... [2025-03-08 17:34:31,103 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:34:31,235 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-min-max-dec.wvr.c[2683,2696] [2025-03-08 17:34:31,246 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:34:31,254 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:34:31,273 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-min-max-dec.wvr.c[2683,2696] [2025-03-08 17:34:31,278 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:34:31,292 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:34:31,293 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:31 WrapperNode [2025-03-08 17:34:31,293 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:34:31,294 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:34:31,294 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:34:31,294 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:34:31,298 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:31" (1/1) ... [2025-03-08 17:34:31,304 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:31" (1/1) ... [2025-03-08 17:34:31,320 INFO L138 Inliner]: procedures = 23, calls = 25, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 112 [2025-03-08 17:34:31,322 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:34:31,323 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:34:31,323 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:34:31,323 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:34:31,329 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:31" (1/1) ... [2025-03-08 17:34:31,329 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:31" (1/1) ... [2025-03-08 17:34:31,336 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:31" (1/1) ... [2025-03-08 17:34:31,349 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 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]. [2025-03-08 17:34:31,353 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:31" (1/1) ... [2025-03-08 17:34:31,353 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:31" (1/1) ... [2025-03-08 17:34:31,360 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:31" (1/1) ... [2025-03-08 17:34:31,364 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:31" (1/1) ... [2025-03-08 17:34:31,365 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:31" (1/1) ... [2025-03-08 17:34:31,365 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:31" (1/1) ... [2025-03-08 17:34:31,367 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:34:31,367 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:34:31,367 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:34:31,367 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:34:31,372 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:31" (1/1) ... [2025-03-08 17:34:31,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:34:31,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:34:31,400 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 17:34:31,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 17:34:31,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:34:31,416 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-08 17:34:31,416 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-08 17:34:31,416 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-08 17:34:31,417 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-08 17:34:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-08 17:34:31,417 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-08 17:34:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-08 17:34:31,417 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-08 17:34:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:34:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 17:34:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 17:34:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 17:34:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 17:34:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:34:31,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:34:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 17:34:31,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 17:34:31,418 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:34:31,492 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:34:31,493 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:34:31,702 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:34:31,702 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:34:31,819 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:34:31,819 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:34:31,819 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:34:31 BoogieIcfgContainer [2025-03-08 17:34:31,819 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:34:31,821 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:34:31,821 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:34:31,826 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:34:31,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:34:31" (1/3) ... [2025-03-08 17:34:31,827 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1680dc5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:34:31, skipping insertion in model container [2025-03-08 17:34:31,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:34:31" (2/3) ... [2025-03-08 17:34:31,827 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1680dc5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:34:31, skipping insertion in model container [2025-03-08 17:34:31,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:34:31" (3/3) ... [2025-03-08 17:34:31,828 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2025-03-08 17:34:31,838 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:34:31,839 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-min-max-dec.wvr.c that has 5 procedures, 57 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-03-08 17:34:31,839 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:34:31,885 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-08 17:34:31,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 62 transitions, 152 flow [2025-03-08 17:34:31,940 INFO L124 PetriNetUnfolderBase]: 6/58 cut-off events. [2025-03-08 17:34:31,942 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-08 17:34:31,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 58 events. 6/58 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 126 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2025-03-08 17:34:31,945 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 62 transitions, 152 flow [2025-03-08 17:34:31,947 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 57 transitions, 138 flow [2025-03-08 17:34:31,952 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:34:31,959 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;@1f20c494, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:34:31,959 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-03-08 17:34:31,971 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:34:31,972 INFO L124 PetriNetUnfolderBase]: 6/56 cut-off events. [2025-03-08 17:34:31,972 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-08 17:34:31,972 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:34:31,972 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, 1, 1, 1] [2025-03-08 17:34:31,973 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 2 more)] === [2025-03-08 17:34:31,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:34:31,976 INFO L85 PathProgramCache]: Analyzing trace with hash 485313208, now seen corresponding path program 1 times [2025-03-08 17:34:31,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:34:31,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404081767] [2025-03-08 17:34:31,981 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:34:31,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:34:32,038 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 17:34:32,073 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 17:34:32,073 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:34:32,073 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:34:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:34:32,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:34:32,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404081767] [2025-03-08 17:34:32,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404081767] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:34:32,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:34:32,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:34:32,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519173646] [2025-03-08 17:34:32,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:34:32,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:34:32,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:34:32,336 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:34:32,336 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:34:32,348 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2025-03-08 17:34:32,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:34:32,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:34:32,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2025-03-08 17:34:32,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:34:34,637 INFO L124 PetriNetUnfolderBase]: 29126/39672 cut-off events. [2025-03-08 17:34:34,638 INFO L125 PetriNetUnfolderBase]: For 1832/1832 co-relation queries the response was YES. [2025-03-08 17:34:34,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78941 conditions, 39672 events. 29126/39672 cut-off events. For 1832/1832 co-relation queries the response was YES. Maximal size of possible extension queue 1206. Compared 240807 event pairs, 13149 based on Foata normal form. 850/39762 useless extension candidates. Maximal degree in co-relation 75425. Up to 21730 conditions per place. [2025-03-08 17:34:34,862 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 68 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2025-03-08 17:34:34,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 345 flow [2025-03-08 17:34:34,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:34:34,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:34:34,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2025-03-08 17:34:34,874 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2025-03-08 17:34:34,875 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 138 flow. Second operand 4 states and 144 transitions. [2025-03-08 17:34:34,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 345 flow [2025-03-08 17:34:34,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 323 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-08 17:34:34,901 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 136 flow [2025-03-08 17:34:34,903 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2025-03-08 17:34:34,905 INFO L279 CegarLoopForPetriNet]: 64 programPoint places, -4 predicate places. [2025-03-08 17:34:34,906 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 136 flow [2025-03-08 17:34:34,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:34:34,907 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:34:34,907 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, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:34:34,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:34:34,908 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 2 more)] === [2025-03-08 17:34:34,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:34:34,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1481624911, now seen corresponding path program 1 times [2025-03-08 17:34:34,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:34:34,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862662539] [2025-03-08 17:34:34,910 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:34:34,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:34:34,928 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-08 17:34:34,942 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 17:34:34,943 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:34:34,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:34:35,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:34:35,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:34:35,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862662539] [2025-03-08 17:34:35,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862662539] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:34:35,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:34:35,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:34:35,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103960720] [2025-03-08 17:34:35,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:34:35,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:34:35,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:34:35,047 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:34:35,047 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:34:35,059 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2025-03-08 17:34:35,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:34:35,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:34:35,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2025-03-08 17:34:35,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:34:37,094 INFO L124 PetriNetUnfolderBase]: 35839/52361 cut-off events. [2025-03-08 17:34:37,094 INFO L125 PetriNetUnfolderBase]: For 4866/4866 co-relation queries the response was YES. [2025-03-08 17:34:37,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104292 conditions, 52361 events. 35839/52361 cut-off events. For 4866/4866 co-relation queries the response was YES. Maximal size of possible extension queue 1453. Compared 367266 event pairs, 20230 based on Foata normal form. 920/50704 useless extension candidates. Maximal degree in co-relation 23141. Up to 32645 conditions per place. [2025-03-08 17:34:37,296 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 71 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2025-03-08 17:34:37,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 355 flow [2025-03-08 17:34:37,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:34:37,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:34:37,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2025-03-08 17:34:37,297 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5685483870967742 [2025-03-08 17:34:37,297 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 136 flow. Second operand 4 states and 141 transitions. [2025-03-08 17:34:37,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 355 flow [2025-03-08 17:34:37,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 87 transitions, 349 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-08 17:34:37,303 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 146 flow [2025-03-08 17:34:37,303 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2025-03-08 17:34:37,304 INFO L279 CegarLoopForPetriNet]: 64 programPoint places, -2 predicate places. [2025-03-08 17:34:37,304 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 146 flow [2025-03-08 17:34:37,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:34:37,304 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:34:37,304 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:34:37,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 17:34:37,305 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 2 more)] === [2025-03-08 17:34:37,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:34:37,305 INFO L85 PathProgramCache]: Analyzing trace with hash 531588830, now seen corresponding path program 1 times [2025-03-08 17:34:37,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:34:37,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861434911] [2025-03-08 17:34:37,305 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:34:37,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:34:37,320 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-08 17:34:37,325 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-08 17:34:37,326 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:34:37,326 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:34:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:34:37,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:34:37,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861434911] [2025-03-08 17:34:37,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861434911] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:34:37,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:34:37,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:34:37,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502602118] [2025-03-08 17:34:37,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:34:37,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:34:37,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:34:37,412 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:34:37,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:34:37,420 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2025-03-08 17:34:37,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:34:37,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:34:37,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2025-03-08 17:34:37,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:34:40,474 INFO L124 PetriNetUnfolderBase]: 47955/69413 cut-off events. [2025-03-08 17:34:40,475 INFO L125 PetriNetUnfolderBase]: For 8100/9217 co-relation queries the response was YES. [2025-03-08 17:34:40,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145421 conditions, 69413 events. 47955/69413 cut-off events. For 8100/9217 co-relation queries the response was YES. Maximal size of possible extension queue 1640. Compared 484975 event pairs, 27914 based on Foata normal form. 2381/68485 useless extension candidates. Maximal degree in co-relation 41637. Up to 43877 conditions per place. [2025-03-08 17:34:40,728 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 72 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2025-03-08 17:34:40,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 88 transitions, 372 flow [2025-03-08 17:34:40,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:34:40,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:34:40,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 140 transitions. [2025-03-08 17:34:40,731 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2025-03-08 17:34:40,731 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 146 flow. Second operand 4 states and 140 transitions. [2025-03-08 17:34:40,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 88 transitions, 372 flow [2025-03-08 17:34:40,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 88 transitions, 367 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-08 17:34:40,738 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 156 flow [2025-03-08 17:34:40,738 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2025-03-08 17:34:40,739 INFO L279 CegarLoopForPetriNet]: 64 programPoint places, 0 predicate places. [2025-03-08 17:34:40,739 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 156 flow [2025-03-08 17:34:40,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:34:40,740 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:34:40,740 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:34:40,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 17:34:40,740 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 2 more)] === [2025-03-08 17:34:40,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:34:40,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1513810455, now seen corresponding path program 1 times [2025-03-08 17:34:40,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:34:40,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784062099] [2025-03-08 17:34:40,741 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:34:40,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:34:40,750 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-08 17:34:40,767 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-08 17:34:40,770 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:34:40,770 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:34:40,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:34:40,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:34:40,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784062099] [2025-03-08 17:34:40,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784062099] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:34:40,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:34:40,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:34:40,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302150440] [2025-03-08 17:34:40,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:34:40,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:34:40,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:34:40,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:34:40,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:34:40,855 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2025-03-08 17:34:40,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:34:40,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:34:40,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2025-03-08 17:34:40,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:34:43,724 INFO L124 PetriNetUnfolderBase]: 44415/64010 cut-off events. [2025-03-08 17:34:43,724 INFO L125 PetriNetUnfolderBase]: For 10520/12666 co-relation queries the response was YES. [2025-03-08 17:34:43,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137988 conditions, 64010 events. 44415/64010 cut-off events. For 10520/12666 co-relation queries the response was YES. Maximal size of possible extension queue 1564. Compared 440389 event pairs, 36184 based on Foata normal form. 2146/62778 useless extension candidates. Maximal degree in co-relation 44425. Up to 57138 conditions per place. [2025-03-08 17:34:43,991 INFO L140 encePairwiseOnDemand]: 59/62 looper letters, 45 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2025-03-08 17:34:43,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 61 transitions, 252 flow [2025-03-08 17:34:43,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:34:43,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:34:43,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2025-03-08 17:34:43,992 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2025-03-08 17:34:43,992 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 156 flow. Second operand 3 states and 99 transitions. [2025-03-08 17:34:43,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 61 transitions, 252 flow [2025-03-08 17:34:44,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 248 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-08 17:34:44,002 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 164 flow [2025-03-08 17:34:44,003 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2025-03-08 17:34:44,004 INFO L279 CegarLoopForPetriNet]: 64 programPoint places, 1 predicate places. [2025-03-08 17:34:44,004 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 164 flow [2025-03-08 17:34:44,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:34:44,004 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:34:44,004 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:34:44,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 17:34:44,004 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 2 more)] === [2025-03-08 17:34:44,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:34:44,005 INFO L85 PathProgramCache]: Analyzing trace with hash 45004916, now seen corresponding path program 1 times [2025-03-08 17:34:44,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:34:44,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970080883] [2025-03-08 17:34:44,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:34:44,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:34:44,014 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-08 17:34:44,027 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-08 17:34:44,027 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:34:44,027 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:34:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:34:44,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:34:44,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970080883] [2025-03-08 17:34:44,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970080883] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:34:44,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:34:44,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-08 17:34:44,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673531712] [2025-03-08 17:34:44,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:34:44,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 17:34:44,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:34:44,255 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 17:34:44,255 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-03-08 17:34:44,299 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-03-08 17:34:44,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 164 flow. Second operand has 8 states, 8 states have (on average 21.375) internal successors, (171), 8 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:34:44,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:34:44,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-03-08 17:34:44,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:34:56,030 INFO L124 PetriNetUnfolderBase]: 167152/243863 cut-off events. [2025-03-08 17:34:56,030 INFO L125 PetriNetUnfolderBase]: For 40854/45719 co-relation queries the response was YES. [2025-03-08 17:34:56,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513312 conditions, 243863 events. 167152/243863 cut-off events. For 40854/45719 co-relation queries the response was YES. Maximal size of possible extension queue 5555. Compared 1974781 event pairs, 20327 based on Foata normal form. 4869/238823 useless extension candidates. Maximal degree in co-relation 513294. Up to 66444 conditions per place. [2025-03-08 17:34:56,953 INFO L140 encePairwiseOnDemand]: 49/62 looper letters, 402 selfloop transitions, 88 changer transitions 396/898 dead transitions. [2025-03-08 17:34:56,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 898 transitions, 4185 flow [2025-03-08 17:34:56,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2025-03-08 17:34:56,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2025-03-08 17:34:56,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 1595 transitions. [2025-03-08 17:34:56,958 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5250164581961817 [2025-03-08 17:34:56,958 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 164 flow. Second operand 49 states and 1595 transitions. [2025-03-08 17:34:56,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 898 transitions, 4185 flow [2025-03-08 17:34:57,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 898 transitions, 4181 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-08 17:34:57,870 INFO L231 Difference]: Finished difference. Result has 147 places, 157 transitions, 808 flow [2025-03-08 17:34:57,870 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=808, PETRI_PLACES=147, PETRI_TRANSITIONS=157} [2025-03-08 17:34:57,871 INFO L279 CegarLoopForPetriNet]: 64 programPoint places, 83 predicate places. [2025-03-08 17:34:57,871 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 157 transitions, 808 flow [2025-03-08 17:34:57,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.375) internal successors, (171), 8 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:34:57,871 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:34:57,871 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:34:57,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-08 17:34:57,871 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 2 more)] === [2025-03-08 17:34:57,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:34:57,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1329634288, now seen corresponding path program 2 times [2025-03-08 17:34:57,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:34:57,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93045025] [2025-03-08 17:34:57,872 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:34:57,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:34:57,886 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-03-08 17:34:57,903 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 52 of 53 statements. [2025-03-08 17:34:57,904 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 17:34:57,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:34:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:34:58,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:34:58,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93045025] [2025-03-08 17:34:58,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93045025] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:34:58,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:34:58,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2025-03-08 17:34:58,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927844770] [2025-03-08 17:34:58,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:34:58,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 17:34:58,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:34:58,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 17:34:58,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2025-03-08 17:34:58,516 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-03-08 17:34:58,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 157 transitions, 808 flow. Second operand has 13 states, 13 states have (on average 19.307692307692307) internal successors, (251), 13 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:34:58,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:34:58,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-03-08 17:34:58,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand