./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 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-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-?-e2fb8be-m [2025-03-08 17:38:13,159 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:38:13,210 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:38:13,215 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:38:13,218 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:38:13,237 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:38:13,238 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:38:13,238 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:38:13,238 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:38:13,239 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:38:13,239 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:38:13,239 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:38:13,240 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:38:13,240 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:38:13,240 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:38:13,240 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:38:13,241 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:38:13,241 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:38:13,241 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:38:13,241 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:38:13,241 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:38:13,241 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:38:13,241 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:38:13,241 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:38:13,241 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:38:13,241 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:38:13,241 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:38:13,241 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:38:13,241 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:38:13,242 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:38:13,242 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:38:13,242 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:38:13,242 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:38:13,242 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:38:13,242 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:38:13,242 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:38:13,242 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:38:13,242 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:38:13,243 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:38:13,243 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:38:13,243 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:38:13,243 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:38:13,243 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:38:13,243 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 [2025-03-08 17:38:13,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:38:13,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:38:13,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:38:13,484 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:38:13,484 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:38:13,486 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2025-03-08 17:38:14,630 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a6c20014/9cb41bb3033d45cabedbc18b4c1d329d/FLAG49cf1a5a6 [2025-03-08 17:38:14,835 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:38:14,835 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2025-03-08 17:38:14,842 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a6c20014/9cb41bb3033d45cabedbc18b4c1d329d/FLAG49cf1a5a6 [2025-03-08 17:38:15,189 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a6c20014/9cb41bb3033d45cabedbc18b4c1d329d [2025-03-08 17:38:15,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:38:15,194 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:38:15,195 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:38:15,195 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:38:15,198 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:38:15,198 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:38:15" (1/1) ... [2025-03-08 17:38:15,199 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31725625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:15, skipping insertion in model container [2025-03-08 17:38:15,199 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:38:15" (1/1) ... [2025-03-08 17:38:15,211 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:38:15,337 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] [2025-03-08 17:38:15,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:38:15,356 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:38:15,378 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] [2025-03-08 17:38:15,383 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:38:15,394 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:38:15,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:15 WrapperNode [2025-03-08 17:38:15,395 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:38:15,396 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:38:15,396 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:38:15,396 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:38:15,400 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:15" (1/1) ... [2025-03-08 17:38:15,404 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:15" (1/1) ... [2025-03-08 17:38:15,425 INFO L138 Inliner]: procedures = 24, calls = 40, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 224 [2025-03-08 17:38:15,429 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:38:15,430 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:38:15,430 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:38:15,430 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:38:15,436 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:15" (1/1) ... [2025-03-08 17:38:15,436 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:15" (1/1) ... [2025-03-08 17:38:15,442 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:15" (1/1) ... [2025-03-08 17:38:15,457 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]. [2025-03-08 17:38:15,457 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:15" (1/1) ... [2025-03-08 17:38:15,457 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:15" (1/1) ... [2025-03-08 17:38:15,461 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:15" (1/1) ... [2025-03-08 17:38:15,462 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:15" (1/1) ... [2025-03-08 17:38:15,463 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:15" (1/1) ... [2025-03-08 17:38:15,463 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:15" (1/1) ... [2025-03-08 17:38:15,465 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:38:15,467 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:38:15,467 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:38:15,468 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:38:15,468 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:15" (1/1) ... [2025-03-08 17:38:15,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:38:15,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:38:15,490 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 17:38:15,491 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 17:38:15,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:38:15,507 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-08 17:38:15,507 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-08 17:38:15,507 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-08 17:38:15,507 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-08 17:38:15,507 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-08 17:38:15,507 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-08 17:38:15,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:38:15,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 17:38:15,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 17:38:15,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 17:38:15,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-08 17:38:15,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-08 17:38:15,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 17:38:15,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:38:15,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:38:15,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 17:38:15,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 17:38:15,508 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 17:38:15,578 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:38:15,579 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:38:15,818 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:38:15,818 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:38:16,009 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:38:16,010 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:38:16,010 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:38:16 BoogieIcfgContainer [2025-03-08 17:38:16,010 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:38:16,012 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:38:16,012 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:38:16,015 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:38:16,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:38:15" (1/3) ... [2025-03-08 17:38:16,016 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2381a1c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:38:16, skipping insertion in model container [2025-03-08 17:38:16,016 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:38:15" (2/3) ... [2025-03-08 17:38:16,016 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2381a1c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:38:16, skipping insertion in model container [2025-03-08 17:38:16,016 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:38:16" (3/3) ... [2025-03-08 17:38:16,017 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2025-03-08 17:38:16,027 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:38:16,028 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. [2025-03-08 17:38:16,028 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:38:16,069 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-08 17:38:16,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 42 transitions, 105 flow [2025-03-08 17:38:16,120 INFO L124 PetriNetUnfolderBase]: 7/39 cut-off events. [2025-03-08 17:38:16,124 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-08 17:38:16,126 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. [2025-03-08 17:38:16,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 42 transitions, 105 flow [2025-03-08 17:38:16,129 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 38 transitions, 94 flow [2025-03-08 17:38:16,134 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:38:16,140 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;@2f0599d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:38:16,140 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-08 17:38:16,148 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:38:16,148 INFO L124 PetriNetUnfolderBase]: 7/37 cut-off events. [2025-03-08 17:38:16,148 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-08 17:38:16,148 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:16,149 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] [2025-03-08 17:38:16,149 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)] === [2025-03-08 17:38:16,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:16,152 INFO L85 PathProgramCache]: Analyzing trace with hash 698142720, now seen corresponding path program 1 times [2025-03-08 17:38:16,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:16,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979939182] [2025-03-08 17:38:16,157 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:38:16,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:16,214 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-08 17:38:16,245 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 17:38:16,247 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:16,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:16,319 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 17:38:16,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:16,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979939182] [2025-03-08 17:38:16,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979939182] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:38:16,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:38:16,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 17:38:16,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630852813] [2025-03-08 17:38:16,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:38:16,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-08 17:38:16,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:16,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-08 17:38:16,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 17:38:16,347 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2025-03-08 17:38:16,349 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) [2025-03-08 17:38:16,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:16,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2025-03-08 17:38:16,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:16,539 INFO L124 PetriNetUnfolderBase]: 727/1227 cut-off events. [2025-03-08 17:38:16,539 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2025-03-08 17:38:16,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2321 conditions, 1227 events. 727/1227 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5793 event pairs, 595 based on Foata normal form. 0/1116 useless extension candidates. Maximal degree in co-relation 2156. Up to 991 conditions per place. [2025-03-08 17:38:16,553 INFO L140 encePairwiseOnDemand]: 40/42 looper letters, 28 selfloop transitions, 0 changer transitions 0/36 dead transitions. [2025-03-08 17:38:16,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 36 transitions, 146 flow [2025-03-08 17:38:16,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-08 17:38:16,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-03-08 17:38:16,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 52 transitions. [2025-03-08 17:38:16,561 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2025-03-08 17:38:16,562 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 94 flow. Second operand 2 states and 52 transitions. [2025-03-08 17:38:16,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 36 transitions, 146 flow [2025-03-08 17:38:16,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 36 transitions, 134 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-08 17:38:16,567 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 78 flow [2025-03-08 17:38:16,569 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} [2025-03-08 17:38:16,571 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, -5 predicate places. [2025-03-08 17:38:16,572 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 78 flow [2025-03-08 17:38:16,573 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) [2025-03-08 17:38:16,573 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:16,573 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] [2025-03-08 17:38:16,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:38:16,573 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)] === [2025-03-08 17:38:16,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:16,574 INFO L85 PathProgramCache]: Analyzing trace with hash 922540124, now seen corresponding path program 1 times [2025-03-08 17:38:16,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:16,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658478052] [2025-03-08 17:38:16,574 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:38:16,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:16,591 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-08 17:38:16,628 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:38:16,630 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:16,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:16,839 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 17:38:16,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:16,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658478052] [2025-03-08 17:38:16,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658478052] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:38:16,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:38:16,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:38:16,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054734966] [2025-03-08 17:38:16,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:38:16,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:38:16,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:16,841 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:38:16,841 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:38:16,841 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2025-03-08 17:38:16,841 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) [2025-03-08 17:38:16,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:16,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2025-03-08 17:38:16,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:17,030 INFO L124 PetriNetUnfolderBase]: 828/1424 cut-off events. [2025-03-08 17:38:17,030 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-03-08 17:38:17,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2623 conditions, 1424 events. 828/1424 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6967 event pairs, 682 based on Foata normal form. 73/1372 useless extension candidates. Maximal degree in co-relation 2620. Up to 991 conditions per place. [2025-03-08 17:38:17,036 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 27 selfloop transitions, 2 changer transitions 17/54 dead transitions. [2025-03-08 17:38:17,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 54 transitions, 209 flow [2025-03-08 17:38:17,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:38:17,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:38:17,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2025-03-08 17:38:17,037 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2025-03-08 17:38:17,037 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 78 flow. Second operand 5 states and 104 transitions. [2025-03-08 17:38:17,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 54 transitions, 209 flow [2025-03-08 17:38:17,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 209 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-08 17:38:17,039 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 100 flow [2025-03-08 17:38:17,039 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} [2025-03-08 17:38:17,040 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2025-03-08 17:38:17,040 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 100 flow [2025-03-08 17:38:17,040 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) [2025-03-08 17:38:17,040 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:17,040 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] [2025-03-08 17:38:17,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 17:38:17,040 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)] === [2025-03-08 17:38:17,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:17,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1877482574, now seen corresponding path program 1 times [2025-03-08 17:38:17,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:17,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60775388] [2025-03-08 17:38:17,041 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:38:17,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:17,052 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 17:38:17,066 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 17:38:17,066 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:17,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:17,209 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 17:38:17,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:17,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60775388] [2025-03-08 17:38:17,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60775388] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:38:17,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:38:17,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:38:17,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555053497] [2025-03-08 17:38:17,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:38:17,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:38:17,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:17,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:38:17,210 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:38:17,210 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2025-03-08 17:38:17,210 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) [2025-03-08 17:38:17,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:17,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2025-03-08 17:38:17,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:17,370 INFO L124 PetriNetUnfolderBase]: 927/1558 cut-off events. [2025-03-08 17:38:17,371 INFO L125 PetriNetUnfolderBase]: For 238/238 co-relation queries the response was YES. [2025-03-08 17:38:17,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3201 conditions, 1558 events. 927/1558 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7563 event pairs, 775 based on Foata normal form. 77/1523 useless extension candidates. Maximal degree in co-relation 3194. Up to 992 conditions per place. [2025-03-08 17:38:17,379 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 28 selfloop transitions, 2 changer transitions 17/55 dead transitions. [2025-03-08 17:38:17,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 244 flow [2025-03-08 17:38:17,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:38:17,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:38:17,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2025-03-08 17:38:17,381 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2025-03-08 17:38:17,381 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 100 flow. Second operand 4 states and 92 transitions. [2025-03-08 17:38:17,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 244 flow [2025-03-08 17:38:17,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 232 flow, removed 5 selfloop flow, removed 2 redundant places. [2025-03-08 17:38:17,384 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 108 flow [2025-03-08 17:38:17,385 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} [2025-03-08 17:38:17,385 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2025-03-08 17:38:17,386 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 108 flow [2025-03-08 17:38:17,386 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) [2025-03-08 17:38:17,386 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:17,386 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] [2025-03-08 17:38:17,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 17:38:17,386 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)] === [2025-03-08 17:38:17,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:17,387 INFO L85 PathProgramCache]: Analyzing trace with hash -592873294, now seen corresponding path program 1 times [2025-03-08 17:38:17,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:17,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899425158] [2025-03-08 17:38:17,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:38:17,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:17,400 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-08 17:38:17,421 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-08 17:38:17,422 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:17,422 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:38:17,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:17,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899425158] [2025-03-08 17:38:17,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899425158] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:38:17,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:38:17,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-08 17:38:17,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957154287] [2025-03-08 17:38:17,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:38:17,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 17:38:17,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:17,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 17:38:17,650 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2025-03-08 17:38:17,669 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2025-03-08 17:38:17,670 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) [2025-03-08 17:38:17,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:17,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2025-03-08 17:38:17,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:17,970 INFO L124 PetriNetUnfolderBase]: 1850/2852 cut-off events. [2025-03-08 17:38:17,970 INFO L125 PetriNetUnfolderBase]: For 677/677 co-relation queries the response was YES. [2025-03-08 17:38:17,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6490 conditions, 2852 events. 1850/2852 cut-off events. For 677/677 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 14866 event pairs, 494 based on Foata normal form. 1/2820 useless extension candidates. Maximal degree in co-relation 6482. Up to 981 conditions per place. [2025-03-08 17:38:17,984 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 87 selfloop transitions, 10 changer transitions 3/106 dead transitions. [2025-03-08 17:38:17,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 106 transitions, 497 flow [2025-03-08 17:38:17,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:38:17,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:38:17,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2025-03-08 17:38:17,988 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2025-03-08 17:38:17,988 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 108 flow. Second operand 8 states and 171 transitions. [2025-03-08 17:38:17,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 106 transitions, 497 flow [2025-03-08 17:38:17,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 106 transitions, 493 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-08 17:38:17,991 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 168 flow [2025-03-08 17:38:17,992 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} [2025-03-08 17:38:17,993 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2025-03-08 17:38:17,993 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 168 flow [2025-03-08 17:38:17,993 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) [2025-03-08 17:38:17,993 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:17,993 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] [2025-03-08 17:38:17,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 17:38:17,993 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)] === [2025-03-08 17:38:17,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:17,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1947879606, now seen corresponding path program 2 times [2025-03-08 17:38:17,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:17,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805714396] [2025-03-08 17:38:17,994 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:38:17,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:18,005 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-03-08 17:38:18,010 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 29 of 31 statements. [2025-03-08 17:38:18,012 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 17:38:18,012 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:38:18,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:18,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805714396] [2025-03-08 17:38:18,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805714396] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:38:18,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:38:18,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 17:38:18,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385569427] [2025-03-08 17:38:18,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:38:18,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:38:18,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:18,053 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:38:18,054 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:38:18,054 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2025-03-08 17:38:18,054 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) [2025-03-08 17:38:18,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:18,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2025-03-08 17:38:18,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:18,258 INFO L124 PetriNetUnfolderBase]: 1428/2347 cut-off events. [2025-03-08 17:38:18,258 INFO L125 PetriNetUnfolderBase]: For 1224/1358 co-relation queries the response was YES. [2025-03-08 17:38:18,261 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 12478 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. [2025-03-08 17:38:18,269 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 44 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2025-03-08 17:38:18,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 305 flow [2025-03-08 17:38:18,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:38:18,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:38:18,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2025-03-08 17:38:18,270 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2025-03-08 17:38:18,270 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 168 flow. Second operand 3 states and 74 transitions. [2025-03-08 17:38:18,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 305 flow [2025-03-08 17:38:18,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 59 transitions, 303 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:38:18,273 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 189 flow [2025-03-08 17:38:18,273 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} [2025-03-08 17:38:18,273 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2025-03-08 17:38:18,273 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 189 flow [2025-03-08 17:38:18,274 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) [2025-03-08 17:38:18,274 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:18,274 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] [2025-03-08 17:38:18,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-08 17:38:18,274 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)] === [2025-03-08 17:38:18,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:18,275 INFO L85 PathProgramCache]: Analyzing trace with hash -907838738, now seen corresponding path program 3 times [2025-03-08 17:38:18,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:18,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698216936] [2025-03-08 17:38:18,275 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:38:18,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:18,284 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 31 statements into 2 equivalence classes. [2025-03-08 17:38:18,288 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 29 of 31 statements. [2025-03-08 17:38:18,288 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-08 17:38:18,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:38:18,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:18,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698216936] [2025-03-08 17:38:18,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698216936] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:38:18,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:38:18,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 17:38:18,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681617771] [2025-03-08 17:38:18,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:38:18,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:38:18,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:18,323 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:38:18,323 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:38:18,323 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2025-03-08 17:38:18,323 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) [2025-03-08 17:38:18,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:18,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2025-03-08 17:38:18,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:18,479 INFO L124 PetriNetUnfolderBase]: 1053/1886 cut-off events. [2025-03-08 17:38:18,479 INFO L125 PetriNetUnfolderBase]: For 1484/1484 co-relation queries the response was YES. [2025-03-08 17:38:18,481 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 10266 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. [2025-03-08 17:38:18,486 INFO L140 encePairwiseOnDemand]: 39/42 looper letters, 46 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2025-03-08 17:38:18,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 331 flow [2025-03-08 17:38:18,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:38:18,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:38:18,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2025-03-08 17:38:18,487 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2025-03-08 17:38:18,487 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 189 flow. Second operand 3 states and 74 transitions. [2025-03-08 17:38:18,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 331 flow [2025-03-08 17:38:18,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 307 flow, removed 8 selfloop flow, removed 3 redundant places. [2025-03-08 17:38:18,491 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 182 flow [2025-03-08 17:38:18,491 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} [2025-03-08 17:38:18,492 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2025-03-08 17:38:18,492 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 182 flow [2025-03-08 17:38:18,492 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) [2025-03-08 17:38:18,492 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:18,492 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] [2025-03-08 17:38:18,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-08 17:38:18,492 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)] === [2025-03-08 17:38:18,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:18,492 INFO L85 PathProgramCache]: Analyzing trace with hash 938946402, now seen corresponding path program 1 times [2025-03-08 17:38:18,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:18,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430544141] [2025-03-08 17:38:18,492 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:38:18,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:18,505 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-08 17:38:18,516 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-08 17:38:18,516 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:18,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:38:18,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:18,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430544141] [2025-03-08 17:38:18,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430544141] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:38:18,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037155142] [2025-03-08 17:38:18,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:38:18,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:38:18,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:38:18,634 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:38:18,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 17:38:18,690 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-08 17:38:18,715 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-08 17:38:18,715 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:18,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:18,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 17:38:18,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:38:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:38:18,825 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:38:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:38:18,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037155142] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:38:18,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:38:18,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-08 17:38:18,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415273045] [2025-03-08 17:38:18,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:38:18,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 17:38:18,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:18,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 17:38:18,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2025-03-08 17:38:18,941 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2025-03-08 17:38:18,941 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) [2025-03-08 17:38:18,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:18,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2025-03-08 17:38:18,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:19,251 INFO L124 PetriNetUnfolderBase]: 1723/3166 cut-off events. [2025-03-08 17:38:19,252 INFO L125 PetriNetUnfolderBase]: For 2038/2038 co-relation queries the response was YES. [2025-03-08 17:38:19,256 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 19739 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. [2025-03-08 17:38:19,266 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 65 selfloop transitions, 6 changer transitions 4/87 dead transitions. [2025-03-08 17:38:19,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 87 transitions, 470 flow [2025-03-08 17:38:19,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:38:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:38:19,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2025-03-08 17:38:19,267 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2025-03-08 17:38:19,267 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 182 flow. Second operand 7 states and 143 transitions. [2025-03-08 17:38:19,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 87 transitions, 470 flow [2025-03-08 17:38:19,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 87 transitions, 463 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-03-08 17:38:19,271 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 231 flow [2025-03-08 17:38:19,271 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} [2025-03-08 17:38:19,271 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2025-03-08 17:38:19,271 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 231 flow [2025-03-08 17:38:19,272 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) [2025-03-08 17:38:19,272 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:19,272 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] [2025-03-08 17:38:19,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 17:38:19,472 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 [2025-03-08 17:38:19,473 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)] === [2025-03-08 17:38:19,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:19,473 INFO L85 PathProgramCache]: Analyzing trace with hash -957026882, now seen corresponding path program 1 times [2025-03-08 17:38:19,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:19,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020189484] [2025-03-08 17:38:19,473 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:38:19,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:19,481 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-08 17:38:19,490 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-08 17:38:19,491 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:19,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:38:19,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:19,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020189484] [2025-03-08 17:38:19,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020189484] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:38:19,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376732273] [2025-03-08 17:38:19,634 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:38:19,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:38:19,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:38:19,636 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:38:19,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 17:38:19,690 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-08 17:38:19,714 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-08 17:38:19,715 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:19,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:19,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 17:38:19,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:38:19,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:38:19,773 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 17:38:19,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376732273] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:38:19,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 17:38:19,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2025-03-08 17:38:19,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266673367] [2025-03-08 17:38:19,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:38:19,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:38:19,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:19,775 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:38:19,775 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-08 17:38:19,775 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2025-03-08 17:38:19,776 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) [2025-03-08 17:38:19,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:19,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2025-03-08 17:38:19,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:20,223 INFO L124 PetriNetUnfolderBase]: 2733/5167 cut-off events. [2025-03-08 17:38:20,224 INFO L125 PetriNetUnfolderBase]: For 4228/4428 co-relation queries the response was YES. [2025-03-08 17:38:20,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13043 conditions, 5167 events. 2733/5167 cut-off events. For 4228/4428 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 35808 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. [2025-03-08 17:38:20,256 INFO L140 encePairwiseOnDemand]: 39/42 looper letters, 72 selfloop transitions, 6 changer transitions 0/90 dead transitions. [2025-03-08 17:38:20,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 90 transitions, 528 flow [2025-03-08 17:38:20,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:38:20,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:38:20,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2025-03-08 17:38:20,257 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2025-03-08 17:38:20,257 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 231 flow. Second operand 4 states and 108 transitions. [2025-03-08 17:38:20,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 90 transitions, 528 flow [2025-03-08 17:38:20,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 505 flow, removed 9 selfloop flow, removed 3 redundant places. [2025-03-08 17:38:20,264 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 275 flow [2025-03-08 17:38:20,264 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} [2025-03-08 17:38:20,265 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2025-03-08 17:38:20,265 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 275 flow [2025-03-08 17:38:20,265 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) [2025-03-08 17:38:20,265 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:20,265 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] [2025-03-08 17:38:20,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 17:38:20,465 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 [2025-03-08 17:38:20,466 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)] === [2025-03-08 17:38:20,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:20,466 INFO L85 PathProgramCache]: Analyzing trace with hash -816539726, now seen corresponding path program 2 times [2025-03-08 17:38:20,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:20,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279698053] [2025-03-08 17:38:20,466 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:38:20,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:20,477 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-03-08 17:38:20,502 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 32 of 35 statements. [2025-03-08 17:38:20,502 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 17:38:20,502 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 17:38:20,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:20,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279698053] [2025-03-08 17:38:20,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279698053] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:38:20,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:38:20,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:38:20,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822391635] [2025-03-08 17:38:20,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:38:20,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:38:20,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:20,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:38:20,624 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:38:20,631 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2025-03-08 17:38:20,631 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) [2025-03-08 17:38:20,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:20,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2025-03-08 17:38:20,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:21,148 INFO L124 PetriNetUnfolderBase]: 3950/6849 cut-off events. [2025-03-08 17:38:21,148 INFO L125 PetriNetUnfolderBase]: For 10391/10728 co-relation queries the response was YES. [2025-03-08 17:38:21,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19149 conditions, 6849 events. 3950/6849 cut-off events. For 10391/10728 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 45094 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. [2025-03-08 17:38:21,176 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 78 selfloop transitions, 9 changer transitions 0/97 dead transitions. [2025-03-08 17:38:21,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 97 transitions, 608 flow [2025-03-08 17:38:21,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:38:21,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:38:21,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2025-03-08 17:38:21,177 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2025-03-08 17:38:21,177 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 275 flow. Second operand 6 states and 124 transitions. [2025-03-08 17:38:21,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 97 transitions, 608 flow [2025-03-08 17:38:21,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 97 transitions, 590 flow, removed 9 selfloop flow, removed 0 redundant places. [2025-03-08 17:38:21,185 INFO L231 Difference]: Finished difference. Result has 73 places, 59 transitions, 305 flow [2025-03-08 17:38:21,185 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} [2025-03-08 17:38:21,186 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2025-03-08 17:38:21,186 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 59 transitions, 305 flow [2025-03-08 17:38:21,186 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) [2025-03-08 17:38:21,186 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:21,186 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] [2025-03-08 17:38:21,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-08 17:38:21,186 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)] === [2025-03-08 17:38:21,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:21,187 INFO L85 PathProgramCache]: Analyzing trace with hash -478361514, now seen corresponding path program 1 times [2025-03-08 17:38:21,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:21,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276320804] [2025-03-08 17:38:21,187 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:38:21,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:21,194 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-08 17:38:21,202 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-08 17:38:21,203 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:21,203 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:38:21,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:21,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276320804] [2025-03-08 17:38:21,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276320804] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:38:21,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559134515] [2025-03-08 17:38:21,294 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:38:21,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:38:21,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:38:21,296 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:38:21,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 17:38:21,346 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-08 17:38:21,371 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-08 17:38:21,371 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:21,371 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:21,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-08 17:38:21,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:38:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 17:38:21,416 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 17:38:21,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559134515] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:38:21,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 17:38:21,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2025-03-08 17:38:21,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715709404] [2025-03-08 17:38:21,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:38:21,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:38:21,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:21,417 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:38:21,417 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-08 17:38:21,417 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2025-03-08 17:38:21,417 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) [2025-03-08 17:38:21,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:21,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2025-03-08 17:38:21,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:21,980 INFO L124 PetriNetUnfolderBase]: 3789/6884 cut-off events. [2025-03-08 17:38:21,980 INFO L125 PetriNetUnfolderBase]: For 10001/10577 co-relation queries the response was YES. [2025-03-08 17:38:21,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19677 conditions, 6884 events. 3789/6884 cut-off events. For 10001/10577 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 47573 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. [2025-03-08 17:38:22,008 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 81 selfloop transitions, 8 changer transitions 8/108 dead transitions. [2025-03-08 17:38:22,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 108 transitions, 695 flow [2025-03-08 17:38:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:38:22,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:38:22,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2025-03-08 17:38:22,009 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2025-03-08 17:38:22,009 INFO L175 Difference]: Start difference. First operand has 73 places, 59 transitions, 305 flow. Second operand 4 states and 114 transitions. [2025-03-08 17:38:22,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 108 transitions, 695 flow [2025-03-08 17:38:22,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 108 transitions, 676 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-03-08 17:38:22,021 INFO L231 Difference]: Finished difference. Result has 75 places, 55 transitions, 287 flow [2025-03-08 17:38:22,021 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} [2025-03-08 17:38:22,023 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2025-03-08 17:38:22,023 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 55 transitions, 287 flow [2025-03-08 17:38:22,023 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) [2025-03-08 17:38:22,023 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:22,023 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] [2025-03-08 17:38:22,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 17:38:22,230 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 [2025-03-08 17:38:22,230 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)] === [2025-03-08 17:38:22,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:22,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1864572260, now seen corresponding path program 1 times [2025-03-08 17:38:22,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:22,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857297221] [2025-03-08 17:38:22,231 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:38:22,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:22,237 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-08 17:38:22,244 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 17:38:22,244 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:22,244 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 17:38:22,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:22,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857297221] [2025-03-08 17:38:22,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857297221] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:38:22,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581560767] [2025-03-08 17:38:22,347 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:38:22,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:38:22,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:38:22,349 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:38:22,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 17:38:22,401 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-08 17:38:22,424 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 17:38:22,424 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:22,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:22,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 17:38:22,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:38:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 17:38:22,524 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:38:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 17:38:22,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581560767] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:38:22,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:38:22,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-03-08 17:38:22,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129296909] [2025-03-08 17:38:22,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:38:22,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-08 17:38:22,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:22,630 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-08 17:38:22,630 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-03-08 17:38:22,630 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2025-03-08 17:38:22,630 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) [2025-03-08 17:38:22,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:22,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2025-03-08 17:38:22,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:23,211 INFO L124 PetriNetUnfolderBase]: 4258/8204 cut-off events. [2025-03-08 17:38:23,211 INFO L125 PetriNetUnfolderBase]: For 14735/15052 co-relation queries the response was YES. [2025-03-08 17:38:23,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25005 conditions, 8204 events. 4258/8204 cut-off events. For 14735/15052 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 60599 event pairs, 2864 based on Foata normal form. 206/8265 useless extension candidates. Maximal degree in co-relation 24983. Up to 4848 conditions per place. [2025-03-08 17:38:23,244 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 42 selfloop transitions, 3 changer transitions 44/100 dead transitions. [2025-03-08 17:38:23,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 100 transitions, 703 flow [2025-03-08 17:38:23,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:38:23,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:38:23,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2025-03-08 17:38:23,245 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2025-03-08 17:38:23,245 INFO L175 Difference]: Start difference. First operand has 75 places, 55 transitions, 287 flow. Second operand 6 states and 128 transitions. [2025-03-08 17:38:23,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 100 transitions, 703 flow [2025-03-08 17:38:23,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 100 transitions, 665 flow, removed 19 selfloop flow, removed 4 redundant places. [2025-03-08 17:38:23,255 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 289 flow [2025-03-08 17:38:23,256 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} [2025-03-08 17:38:23,256 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2025-03-08 17:38:23,256 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 289 flow [2025-03-08 17:38:23,256 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) [2025-03-08 17:38:23,256 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:23,256 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] [2025-03-08 17:38:23,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 17:38:23,461 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 [2025-03-08 17:38:23,461 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)] === [2025-03-08 17:38:23,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:23,461 INFO L85 PathProgramCache]: Analyzing trace with hash 819505690, now seen corresponding path program 2 times [2025-03-08 17:38:23,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:23,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375759361] [2025-03-08 17:38:23,461 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:38:23,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:23,469 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-03-08 17:38:23,488 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-03-08 17:38:23,488 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:38:23,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:38:24,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:24,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375759361] [2025-03-08 17:38:24,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375759361] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:38:24,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893840133] [2025-03-08 17:38:24,575 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:38:24,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:38:24,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:38:24,577 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:38:24,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 17:38:24,634 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-03-08 17:38:24,662 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-03-08 17:38:24,663 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:38:24,663 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:24,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-08 17:38:24,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:38:24,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2025-03-08 17:38:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:38:24,932 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:38:25,117 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 17:38:25,117 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 [2025-03-08 17:38:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:38:25,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893840133] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:38:25,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:38:25,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 10] total 32 [2025-03-08 17:38:25,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986960277] [2025-03-08 17:38:25,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:38:25,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-08 17:38:25,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:25,433 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-08 17:38:25,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2025-03-08 17:38:25,506 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2025-03-08 17:38:25,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 289 flow. Second operand has 33 states, 33 states have (on average 9.818181818181818) internal successors, (324), 33 states have internal predecessors, (324), 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 17:38:25,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:25,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2025-03-08 17:38:25,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:31,301 INFO L124 PetriNetUnfolderBase]: 37498/57528 cut-off events. [2025-03-08 17:38:31,301 INFO L125 PetriNetUnfolderBase]: For 77545/77545 co-relation queries the response was YES. [2025-03-08 17:38:31,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167604 conditions, 57528 events. 37498/57528 cut-off events. For 77545/77545 co-relation queries the response was YES. Maximal size of possible extension queue 2312. Compared 435416 event pairs, 2066 based on Foata normal form. 1012/54438 useless extension candidates. Maximal degree in co-relation 167582. Up to 7113 conditions per place. [2025-03-08 17:38:31,711 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 685 selfloop transitions, 100 changer transitions 36/827 dead transitions. [2025-03-08 17:38:31,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 827 transitions, 5485 flow [2025-03-08 17:38:31,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2025-03-08 17:38:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2025-03-08 17:38:31,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 1082 transitions. [2025-03-08 17:38:31,714 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4519632414369256 [2025-03-08 17:38:31,715 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 289 flow. Second operand 57 states and 1082 transitions. [2025-03-08 17:38:31,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 827 transitions, 5485 flow [2025-03-08 17:38:31,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 827 transitions, 5431 flow, removed 23 selfloop flow, removed 4 redundant places. [2025-03-08 17:38:31,787 INFO L231 Difference]: Finished difference. Result has 154 places, 155 transitions, 1291 flow [2025-03-08 17:38:31,788 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=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1291, PETRI_PLACES=154, PETRI_TRANSITIONS=155} [2025-03-08 17:38:31,790 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2025-03-08 17:38:31,791 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 155 transitions, 1291 flow [2025-03-08 17:38:31,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 9.818181818181818) internal successors, (324), 33 states have internal predecessors, (324), 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 17:38:31,791 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:31,791 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] [2025-03-08 17:38:31,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 17:38:31,996 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 [2025-03-08 17:38:31,996 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)] === [2025-03-08 17:38:31,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:31,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1843902994, now seen corresponding path program 3 times [2025-03-08 17:38:31,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:31,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985768375] [2025-03-08 17:38:31,997 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:38:31,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:32,005 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 40 statements into 2 equivalence classes. [2025-03-08 17:38:32,033 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 32 of 40 statements. [2025-03-08 17:38:32,033 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-08 17:38:32,033 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-08 17:38:32,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:32,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985768375] [2025-03-08 17:38:32,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985768375] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:38:32,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:38:32,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-08 17:38:32,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008726411] [2025-03-08 17:38:32,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:38:32,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 17:38:32,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:32,179 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 17:38:32,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-08 17:38:32,194 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2025-03-08 17:38:32,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 155 transitions, 1291 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 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 17:38:32,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:32,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2025-03-08 17:38:32,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:38:37,160 INFO L124 PetriNetUnfolderBase]: 33941/52971 cut-off events. [2025-03-08 17:38:37,161 INFO L125 PetriNetUnfolderBase]: For 358132/358132 co-relation queries the response was YES. [2025-03-08 17:38:37,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219892 conditions, 52971 events. 33941/52971 cut-off events. For 358132/358132 co-relation queries the response was YES. Maximal size of possible extension queue 1904. Compared 399902 event pairs, 3873 based on Foata normal form. 1290/53980 useless extension candidates. Maximal degree in co-relation 219842. Up to 22409 conditions per place. [2025-03-08 17:38:37,702 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 181 selfloop transitions, 53 changer transitions 0/240 dead transitions. [2025-03-08 17:38:37,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 240 transitions, 2362 flow [2025-03-08 17:38:37,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:38:37,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:38:37,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2025-03-08 17:38:37,703 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4375 [2025-03-08 17:38:37,703 INFO L175 Difference]: Start difference. First operand has 154 places, 155 transitions, 1291 flow. Second operand 8 states and 147 transitions. [2025-03-08 17:38:37,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 240 transitions, 2362 flow [2025-03-08 17:38:39,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 240 transitions, 2170 flow, removed 84 selfloop flow, removed 9 redundant places. [2025-03-08 17:38:39,366 INFO L231 Difference]: Finished difference. Result has 152 places, 156 transitions, 1337 flow [2025-03-08 17:38:39,366 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1337, PETRI_PLACES=152, PETRI_TRANSITIONS=156} [2025-03-08 17:38:39,366 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2025-03-08 17:38:39,366 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 156 transitions, 1337 flow [2025-03-08 17:38:39,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 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 17:38:39,367 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:38:39,367 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 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] [2025-03-08 17:38:39,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-08 17:38:39,367 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)] === [2025-03-08 17:38:39,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:38:39,367 INFO L85 PathProgramCache]: Analyzing trace with hash -599428354, now seen corresponding path program 1 times [2025-03-08 17:38:39,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:38:39,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720002049] [2025-03-08 17:38:39,368 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:38:39,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:38:39,373 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-08 17:38:39,388 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 17:38:39,388 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:39,388 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:38:41,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:38:41,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720002049] [2025-03-08 17:38:41,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720002049] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:38:41,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227671534] [2025-03-08 17:38:41,703 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:38:41,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:38:41,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:38:41,705 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:38:41,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 17:38:41,756 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-03-08 17:38:41,780 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 17:38:41,780 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:38:41,780 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:38:41,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-03-08 17:38:41,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:38:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:38:42,713 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:38:43,212 INFO L349 Elim1Store]: treesize reduction 19, result has 79.6 percent of original size [2025-03-08 17:38:43,213 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 46 treesize of output 87 [2025-03-08 17:38:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:38:43,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227671534] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:38:43,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:38:43,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 17] total 55 [2025-03-08 17:38:43,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623981141] [2025-03-08 17:38:43,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:38:43,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-03-08 17:38:43,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:38:43,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-03-08 17:38:43,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2849, Unknown=0, NotChecked=0, Total=3080 [2025-03-08 17:38:44,063 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2025-03-08 17:38:44,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 156 transitions, 1337 flow. Second operand has 56 states, 56 states have (on average 8.035714285714286) internal successors, (450), 56 states have internal predecessors, (450), 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 17:38:44,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:38:44,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2025-03-08 17:38:44,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:39:02,225 INFO L124 PetriNetUnfolderBase]: 84434/128735 cut-off events. [2025-03-08 17:39:02,225 INFO L125 PetriNetUnfolderBase]: For 1020515/1022606 co-relation queries the response was YES. [2025-03-08 17:39:03,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566240 conditions, 128735 events. 84434/128735 cut-off events. For 1020515/1022606 co-relation queries the response was YES. Maximal size of possible extension queue 4180. Compared 1056222 event pairs, 6166 based on Foata normal form. 1354/129854 useless extension candidates. Maximal degree in co-relation 566192. Up to 46535 conditions per place. [2025-03-08 17:39:03,569 INFO L140 encePairwiseOnDemand]: 23/42 looper letters, 687 selfloop transitions, 426 changer transitions 96/1216 dead transitions. [2025-03-08 17:39:03,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 1216 transitions, 12189 flow [2025-03-08 17:39:03,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2025-03-08 17:39:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2025-03-08 17:39:03,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 1156 transitions. [2025-03-08 17:39:03,573 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35745207173778604 [2025-03-08 17:39:03,573 INFO L175 Difference]: Start difference. First operand has 152 places, 156 transitions, 1337 flow. Second operand 77 states and 1156 transitions. [2025-03-08 17:39:03,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 1216 transitions, 12189 flow [2025-03-08 17:39:10,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 1216 transitions, 12120 flow, removed 19 selfloop flow, removed 3 redundant places. [2025-03-08 17:39:10,259 INFO L231 Difference]: Finished difference. Result has 257 places, 560 transitions, 7655 flow [2025-03-08 17:39:10,259 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=7655, PETRI_PLACES=257, PETRI_TRANSITIONS=560} [2025-03-08 17:39:10,260 INFO L279 CegarLoopForPetriNet]: 41 programPoint places, 216 predicate places. [2025-03-08 17:39:10,260 INFO L471 AbstractCegarLoop]: Abstraction has has 257 places, 560 transitions, 7655 flow [2025-03-08 17:39:10,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 8.035714285714286) internal successors, (450), 56 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:39:10,260 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:39:10,260 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 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] [2025-03-08 17:39:10,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 17:39:10,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:39:10,461 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-08 17:39:10,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:39:10,462 INFO L85 PathProgramCache]: Analyzing trace with hash 827301772, now seen corresponding path program 2 times [2025-03-08 17:39:10,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:39:10,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078958932] [2025-03-08 17:39:10,462 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:39:10,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:39:10,469 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-08 17:39:10,484 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 17:39:10,484 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:39:10,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:39:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:39:11,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:39:11,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078958932] [2025-03-08 17:39:11,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078958932] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:39:11,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646821665] [2025-03-08 17:39:11,559 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:39:11,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:39:11,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:39:11,561 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:39:11,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 17:39:11,618 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-08 17:39:11,650 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 17:39:11,650 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:39:11,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:39:11,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-08 17:39:11,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:39:12,226 INFO L349 Elim1Store]: treesize reduction 21, result has 59.6 percent of original size [2025-03-08 17:39:12,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 44 [2025-03-08 17:39:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:39:12,424 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:39:12,971 INFO L349 Elim1Store]: treesize reduction 19, result has 79.6 percent of original size [2025-03-08 17:39:12,971 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 57 treesize of output 90 [2025-03-08 17:39:13,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:39:13,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646821665] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:39:13,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:39:13,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17, 17] total 55 [2025-03-08 17:39:13,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281059389] [2025-03-08 17:39:13,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:39:13,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2025-03-08 17:39:13,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:39:13,562 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2025-03-08 17:39:13,563 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=2805, Unknown=0, NotChecked=0, Total=3080 [2025-03-08 17:39:13,838 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 42 [2025-03-08 17:39:13,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 560 transitions, 7655 flow. Second operand has 56 states, 56 states have (on average 7.0) internal successors, (392), 56 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:39:13,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:39:13,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 42 [2025-03-08 17:39:13,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:39:18,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 17:39:22,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 17:39:28,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 17:39:32,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 17:39:36,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 17:39:40,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-08 17:39:44,827 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 [1]