./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test-context1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/test-context1.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 16:49:06,184 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 16:49:06,233 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 16:49:06,243 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 16:49:06,244 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 16:49:06,262 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 16:49:06,264 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 16:49:06,264 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 16:49:06,264 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 16:49:06,265 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 16:49:06,265 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 16:49:06,265 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 16:49:06,266 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 16:49:06,266 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 16:49:06,266 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 16:49:06,266 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 16:49:06,267 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 16:49:06,267 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 16:49:06,267 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 16:49:06,267 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 16:49:06,267 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 16:49:06,267 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 16:49:06,267 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 16:49:06,267 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 16:49:06,267 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 16:49:06,267 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 16:49:06,267 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 16:49:06,267 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 16:49:06,267 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 16:49:06,267 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:49:06,268 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:49:06,268 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:49:06,268 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:49:06,268 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 16:49:06,268 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:49:06,268 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:49:06,268 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:49:06,269 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:49:06,269 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 16:49:06,269 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 16:49:06,269 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 16:49:06,269 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 16:49:06,269 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 16:49:06,269 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 16:49:06,269 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 16:49:06,269 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 16:49:06,269 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 16:49:06,269 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 16:49:06,269 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e [2025-01-09 16:49:06,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 16:49:06,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 16:49:06,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 16:49:06,486 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 16:49:06,487 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 16:49:06,488 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-context1.wvr.c [2025-01-09 16:49:07,636 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/cbe1a46ab/bfd8dc7b89d1488d9ef6fd04bfa59274/FLAGcf9693dd2 [2025-01-09 16:49:07,876 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 16:49:07,880 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c [2025-01-09 16:49:07,896 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/cbe1a46ab/bfd8dc7b89d1488d9ef6fd04bfa59274/FLAGcf9693dd2 [2025-01-09 16:49:08,220 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/cbe1a46ab/bfd8dc7b89d1488d9ef6fd04bfa59274 [2025-01-09 16:49:08,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 16:49:08,224 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 16:49:08,226 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 16:49:08,226 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 16:49:08,229 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 16:49:08,229 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:49:08" (1/1) ... [2025-01-09 16:49:08,230 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f99ca09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:08, skipping insertion in model container [2025-01-09 16:49:08,230 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:49:08" (1/1) ... [2025-01-09 16:49:08,243 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 16:49:08,368 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c[2459,2472] [2025-01-09 16:49:08,376 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:49:08,385 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 16:49:08,399 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c[2459,2472] [2025-01-09 16:49:08,400 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:49:08,409 INFO L204 MainTranslator]: Completed translation [2025-01-09 16:49:08,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:08 WrapperNode [2025-01-09 16:49:08,410 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 16:49:08,410 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 16:49:08,411 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 16:49:08,411 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 16:49:08,416 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:08" (1/1) ... [2025-01-09 16:49:08,421 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:08" (1/1) ... [2025-01-09 16:49:08,436 INFO L138 Inliner]: procedures = 23, calls = 24, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 122 [2025-01-09 16:49:08,437 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 16:49:08,438 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 16:49:08,438 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 16:49:08,438 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 16:49:08,444 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:08" (1/1) ... [2025-01-09 16:49:08,444 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:08" (1/1) ... [2025-01-09 16:49:08,448 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:08" (1/1) ... [2025-01-09 16:49:08,463 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-01-09 16:49:08,464 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:08" (1/1) ... [2025-01-09 16:49:08,464 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:08" (1/1) ... [2025-01-09 16:49:08,469 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:08" (1/1) ... [2025-01-09 16:49:08,473 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:08" (1/1) ... [2025-01-09 16:49:08,475 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:08" (1/1) ... [2025-01-09 16:49:08,478 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:08" (1/1) ... [2025-01-09 16:49:08,479 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:08" (1/1) ... [2025-01-09 16:49:08,480 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 16:49:08,484 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 16:49:08,484 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 16:49:08,484 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 16:49:08,485 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:08" (1/1) ... [2025-01-09 16:49:08,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:49:08,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:08,509 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-09 16:49:08,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-09 16:49:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 16:49:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-01-09 16:49:08,529 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-01-09 16:49:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-01-09 16:49:08,529 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-01-09 16:49:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 16:49:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 16:49:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-09 16:49:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-09 16:49:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-01-09 16:49:08,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-01-09 16:49:08,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-09 16:49:08,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 16:49:08,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 16:49:08,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-09 16:49:08,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-09 16:49:08,531 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-01-09 16:49:08,608 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 16:49:08,610 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 16:49:08,755 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-09 16:49:08,755 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 16:49:08,891 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 16:49:08,891 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2025-01-09 16:49:08,891 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:49:08 BoogieIcfgContainer [2025-01-09 16:49:08,891 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 16:49:08,893 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 16:49:08,893 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 16:49:08,896 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 16:49:08,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 04:49:08" (1/3) ... [2025-01-09 16:49:08,897 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@777b5442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:49:08, skipping insertion in model container [2025-01-09 16:49:08,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:49:08" (2/3) ... [2025-01-09 16:49:08,897 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@777b5442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:49:08, skipping insertion in model container [2025-01-09 16:49:08,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:49:08" (3/3) ... [2025-01-09 16:49:08,898 INFO L128 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2025-01-09 16:49:08,908 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 16:49:08,909 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG test-context1.wvr.c that has 3 procedures, 24 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-01-09 16:49:08,909 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-09 16:49:08,944 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-01-09 16:49:08,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 28 transitions, 70 flow [2025-01-09 16:49:09,026 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2025-01-09 16:49:09,029 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-09 16:49:09,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 5/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2025-01-09 16:49:09,031 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 28 transitions, 70 flow [2025-01-09 16:49:09,033 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 25 transitions, 62 flow [2025-01-09 16:49:09,038 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 16:49:09,049 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;@1ed4f4d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 16:49:09,050 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-01-09 16:49:09,060 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-09 16:49:09,063 INFO L124 PetriNetUnfolderBase]: 5/24 cut-off events. [2025-01-09 16:49:09,063 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-09 16:49:09,063 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:09,064 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:09,064 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:09,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:09,073 INFO L85 PathProgramCache]: Analyzing trace with hash -896330178, now seen corresponding path program 1 times [2025-01-09 16:49:09,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:09,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865399726] [2025-01-09 16:49:09,085 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:49:09,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:09,183 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:49:09,197 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:49:09,198 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:09,198 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:49:09,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:09,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865399726] [2025-01-09 16:49:09,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865399726] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:49:09,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:49:09,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 16:49:09,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407365057] [2025-01-09 16:49:09,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:49:09,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-09 16:49:09,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:09,277 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-09 16:49:09,277 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 16:49:09,279 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-01-09 16:49:09,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 62 flow. Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 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) [2025-01-09 16:49:09,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:09,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-01-09 16:49:09,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:09,359 INFO L124 PetriNetUnfolderBase]: 122/217 cut-off events. [2025-01-09 16:49:09,360 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2025-01-09 16:49:09,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 217 events. 122/217 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 700 event pairs, 94 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 405. Up to 214 conditions per place. [2025-01-09 16:49:09,362 INFO L140 encePairwiseOnDemand]: 26/28 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2025-01-09 16:49:09,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 23 transitions, 98 flow [2025-01-09 16:49:09,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-09 16:49:09,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-01-09 16:49:09,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 32 transitions. [2025-01-09 16:49:09,370 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-01-09 16:49:09,371 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 62 flow. Second operand 2 states and 32 transitions. [2025-01-09 16:49:09,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 23 transitions, 98 flow [2025-01-09 16:49:09,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 23 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-09 16:49:09,375 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 50 flow [2025-01-09 16:49:09,377 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2025-01-09 16:49:09,379 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2025-01-09 16:49:09,379 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 50 flow [2025-01-09 16:49:09,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 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) [2025-01-09 16:49:09,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:09,379 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:09,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 16:49:09,380 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:09,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:09,380 INFO L85 PathProgramCache]: Analyzing trace with hash 528785919, now seen corresponding path program 1 times [2025-01-09 16:49:09,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:09,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946978566] [2025-01-09 16:49:09,380 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:49:09,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:09,387 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-09 16:49:09,399 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:49:09,399 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:09,399 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:09,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:49:09,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:09,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946978566] [2025-01-09 16:49:09,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946978566] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:49:09,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:49:09,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 16:49:09,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7732333] [2025-01-09 16:49:09,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:49:09,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 16:49:09,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:09,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 16:49:09,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 16:49:09,453 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-01-09 16:49:09,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2025-01-09 16:49:09,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:09,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-01-09 16:49:09,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:09,547 INFO L124 PetriNetUnfolderBase]: 203/353 cut-off events. [2025-01-09 16:49:09,547 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-01-09 16:49:09,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 353 events. 203/353 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1259 event pairs, 82 based on Foata normal form. 1/304 useless extension candidates. Maximal degree in co-relation 709. Up to 176 conditions per place. [2025-01-09 16:49:09,549 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 28 selfloop transitions, 2 changer transitions 3/36 dead transitions. [2025-01-09 16:49:09,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 36 transitions, 144 flow [2025-01-09 16:49:09,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 16:49:09,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-09 16:49:09,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2025-01-09 16:49:09,550 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-01-09 16:49:09,550 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 50 flow. Second operand 3 states and 49 transitions. [2025-01-09 16:49:09,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 36 transitions, 144 flow [2025-01-09 16:49:09,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-01-09 16:49:09,552 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 62 flow [2025-01-09 16:49:09,552 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2025-01-09 16:49:09,552 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2025-01-09 16:49:09,552 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 62 flow [2025-01-09 16:49:09,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2025-01-09 16:49:09,553 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:09,553 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] [2025-01-09 16:49:09,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 16:49:09,553 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:09,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:09,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1580898411, now seen corresponding path program 1 times [2025-01-09 16:49:09,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:09,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077958403] [2025-01-09 16:49:09,554 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:49:09,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:09,560 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-01-09 16:49:09,568 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-01-09 16:49:09,568 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:09,568 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:49:09,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:09,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077958403] [2025-01-09 16:49:09,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077958403] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:49:09,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:49:09,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 16:49:09,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737308787] [2025-01-09 16:49:09,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:49:09,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 16:49:09,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:09,627 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 16:49:09,627 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 16:49:09,628 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-01-09 16:49:09,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2025-01-09 16:49:09,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:09,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-01-09 16:49:09,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:09,709 INFO L124 PetriNetUnfolderBase]: 251/446 cut-off events. [2025-01-09 16:49:09,709 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2025-01-09 16:49:09,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 446 events. 251/446 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1650 event pairs, 113 based on Foata normal form. 11/388 useless extension candidates. Maximal degree in co-relation 934. Up to 306 conditions per place. [2025-01-09 16:49:09,711 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 27 selfloop transitions, 2 changer transitions 6/38 dead transitions. [2025-01-09 16:49:09,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 38 transitions, 163 flow [2025-01-09 16:49:09,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 16:49:09,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-09 16:49:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2025-01-09 16:49:09,712 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2025-01-09 16:49:09,712 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 62 flow. Second operand 3 states and 50 transitions. [2025-01-09 16:49:09,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 38 transitions, 163 flow [2025-01-09 16:49:09,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 38 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-09 16:49:09,713 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 72 flow [2025-01-09 16:49:09,713 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2025-01-09 16:49:09,714 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2025-01-09 16:49:09,714 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 72 flow [2025-01-09 16:49:09,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2025-01-09 16:49:09,714 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:09,714 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] [2025-01-09 16:49:09,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-09 16:49:09,714 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:09,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:09,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1363805506, now seen corresponding path program 1 times [2025-01-09 16:49:09,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:09,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777811798] [2025-01-09 16:49:09,715 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:49:09,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:09,721 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-09 16:49:09,730 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-09 16:49:09,730 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:09,730 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:49:09,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:09,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777811798] [2025-01-09 16:49:09,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777811798] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:49:09,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:49:09,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 16:49:09,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510906138] [2025-01-09 16:49:09,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:49:09,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 16:49:09,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:09,851 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 16:49:09,851 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 16:49:09,851 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-01-09 16:49:09,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:09,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:09,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-01-09 16:49:09,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:09,949 INFO L124 PetriNetUnfolderBase]: 319/585 cut-off events. [2025-01-09 16:49:09,949 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2025-01-09 16:49:09,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1268 conditions, 585 events. 319/585 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2450 event pairs, 285 based on Foata normal form. 12/504 useless extension candidates. Maximal degree in co-relation 1262. Up to 443 conditions per place. [2025-01-09 16:49:09,954 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 21 selfloop transitions, 2 changer transitions 15/41 dead transitions. [2025-01-09 16:49:09,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 184 flow [2025-01-09 16:49:09,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 16:49:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-09 16:49:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 57 transitions. [2025-01-09 16:49:09,956 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2025-01-09 16:49:09,956 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 72 flow. Second operand 4 states and 57 transitions. [2025-01-09 16:49:09,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 184 flow [2025-01-09 16:49:09,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-09 16:49:09,957 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 84 flow [2025-01-09 16:49:09,957 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2025-01-09 16:49:09,958 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2025-01-09 16:49:09,958 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 84 flow [2025-01-09 16:49:09,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:09,958 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:09,958 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] [2025-01-09 16:49:09,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-09 16:49:09,958 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:09,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:09,959 INFO L85 PathProgramCache]: Analyzing trace with hash 714870725, now seen corresponding path program 1 times [2025-01-09 16:49:09,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:09,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704869239] [2025-01-09 16:49:09,959 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:49:09,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:09,968 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-09 16:49:09,987 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-09 16:49:09,987 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:09,987 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:10,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:10,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:10,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704869239] [2025-01-09 16:49:10,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704869239] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:49:10,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:49:10,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 16:49:10,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672851895] [2025-01-09 16:49:10,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:49:10,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 16:49:10,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:10,230 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 16:49:10,231 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-01-09 16:49:10,231 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-01-09 16:49:10,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 84 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2025-01-09 16:49:10,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:10,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-01-09 16:49:10,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:10,409 INFO L124 PetriNetUnfolderBase]: 331/583 cut-off events. [2025-01-09 16:49:10,409 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2025-01-09 16:49:10,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1289 conditions, 583 events. 331/583 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2148 event pairs, 68 based on Foata normal form. 1/494 useless extension candidates. Maximal degree in co-relation 1281. Up to 157 conditions per place. [2025-01-09 16:49:10,411 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 44 selfloop transitions, 5 changer transitions 12/64 dead transitions. [2025-01-09 16:49:10,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 64 transitions, 295 flow [2025-01-09 16:49:10,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 16:49:10,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-09 16:49:10,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2025-01-09 16:49:10,412 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2025-01-09 16:49:10,412 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 84 flow. Second operand 6 states and 91 transitions. [2025-01-09 16:49:10,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 64 transitions, 295 flow [2025-01-09 16:49:10,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 64 transitions, 289 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-01-09 16:49:10,414 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 98 flow [2025-01-09 16:49:10,414 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=98, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2025-01-09 16:49:10,415 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2025-01-09 16:49:10,415 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 98 flow [2025-01-09 16:49:10,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2025-01-09 16:49:10,415 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:10,415 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:10,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-01-09 16:49:10,415 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:10,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:10,416 INFO L85 PathProgramCache]: Analyzing trace with hash 632544949, now seen corresponding path program 2 times [2025-01-09 16:49:10,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:10,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278032676] [2025-01-09 16:49:10,416 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:49:10,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:10,428 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-01-09 16:49:10,441 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-01-09 16:49:10,441 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:49:10,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:10,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:10,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278032676] [2025-01-09 16:49:10,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278032676] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:49:10,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:49:10,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 16:49:10,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456087000] [2025-01-09 16:49:10,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:49:10,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 16:49:10,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:10,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 16:49:10,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-01-09 16:49:10,492 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-01-09 16:49:10,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2025-01-09 16:49:10,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:10,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-01-09 16:49:10,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:10,603 INFO L124 PetriNetUnfolderBase]: 719/1265 cut-off events. [2025-01-09 16:49:10,603 INFO L125 PetriNetUnfolderBase]: For 395/395 co-relation queries the response was YES. [2025-01-09 16:49:10,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2845 conditions, 1265 events. 719/1265 cut-off events. For 395/395 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 5505 event pairs, 280 based on Foata normal form. 22/1091 useless extension candidates. Maximal degree in co-relation 2837. Up to 462 conditions per place. [2025-01-09 16:49:10,607 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 50 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2025-01-09 16:49:10,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 60 transitions, 312 flow [2025-01-09 16:49:10,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 16:49:10,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-09 16:49:10,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2025-01-09 16:49:10,608 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2025-01-09 16:49:10,609 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 98 flow. Second operand 4 states and 72 transitions. [2025-01-09 16:49:10,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 60 transitions, 312 flow [2025-01-09 16:49:10,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 60 transitions, 298 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-01-09 16:49:10,610 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 152 flow [2025-01-09 16:49:10,611 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2025-01-09 16:49:10,611 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2025-01-09 16:49:10,611 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 152 flow [2025-01-09 16:49:10,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2025-01-09 16:49:10,611 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:10,611 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:10,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-01-09 16:49:10,612 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:10,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:10,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1798354132, now seen corresponding path program 3 times [2025-01-09 16:49:10,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:10,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528014095] [2025-01-09 16:49:10,612 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:49:10,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:10,619 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 31 statements into 2 equivalence classes. [2025-01-09 16:49:10,631 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-01-09 16:49:10,631 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:49:10,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:49:10,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:10,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528014095] [2025-01-09 16:49:10,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528014095] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:10,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893068041] [2025-01-09 16:49:10,798 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:49:10,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:10,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:10,800 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:10,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-09 16:49:10,872 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 31 statements into 2 equivalence classes. [2025-01-09 16:49:10,905 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-01-09 16:49:10,905 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:49:10,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:10,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-09 16:49:10,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:49:11,104 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:49:11,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893068041] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:11,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:11,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-01-09 16:49:11,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565973229] [2025-01-09 16:49:11,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:11,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-09 16:49:11,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:11,232 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-09 16:49:11,232 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2025-01-09 16:49:11,232 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-01-09 16:49:11,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 152 flow. Second operand has 15 states, 15 states have (on average 9.266666666666667) internal successors, (139), 15 states have internal predecessors, (139), 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) [2025-01-09 16:49:11,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:11,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-01-09 16:49:11,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:11,539 INFO L124 PetriNetUnfolderBase]: 1255/2228 cut-off events. [2025-01-09 16:49:11,539 INFO L125 PetriNetUnfolderBase]: For 1341/1341 co-relation queries the response was YES. [2025-01-09 16:49:11,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5331 conditions, 2228 events. 1255/2228 cut-off events. For 1341/1341 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 11606 event pairs, 404 based on Foata normal form. 33/1910 useless extension candidates. Maximal degree in co-relation 5321. Up to 1122 conditions per place. [2025-01-09 16:49:11,549 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 33 selfloop transitions, 4 changer transitions 65/105 dead transitions. [2025-01-09 16:49:11,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 105 transitions, 574 flow [2025-01-09 16:49:11,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 16:49:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-09 16:49:11,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2025-01-09 16:49:11,551 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2025-01-09 16:49:11,551 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 152 flow. Second operand 9 states and 138 transitions. [2025-01-09 16:49:11,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 105 transitions, 574 flow [2025-01-09 16:49:11,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 105 transitions, 564 flow, removed 5 selfloop flow, removed 0 redundant places. [2025-01-09 16:49:11,558 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 180 flow [2025-01-09 16:49:11,558 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=180, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2025-01-09 16:49:11,560 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 22 predicate places. [2025-01-09 16:49:11,560 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 180 flow [2025-01-09 16:49:11,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.266666666666667) internal successors, (139), 15 states have internal predecessors, (139), 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) [2025-01-09 16:49:11,560 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:11,560 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:11,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 16:49:11,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:11,765 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:11,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:11,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1147980491, now seen corresponding path program 4 times [2025-01-09 16:49:11,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:11,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609075522] [2025-01-09 16:49:11,767 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:49:11,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:11,775 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 32 statements into 2 equivalence classes. [2025-01-09 16:49:11,782 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-01-09 16:49:11,782 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:49:11,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:49:11,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:11,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609075522] [2025-01-09 16:49:11,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609075522] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:11,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383206737] [2025-01-09 16:49:11,924 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:49:11,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:11,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:11,926 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:11,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-09 16:49:11,963 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 32 statements into 2 equivalence classes. [2025-01-09 16:49:11,981 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-01-09 16:49:11,981 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:49:11,981 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:11,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-09 16:49:11,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:49:12,041 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:12,074 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-01-09 16:49:12,075 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 28 treesize of output 11 [2025-01-09 16:49:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:49:12,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383206737] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:12,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:12,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2025-01-09 16:49:12,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400160607] [2025-01-09 16:49:12,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:12,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-09 16:49:12,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:12,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-09 16:49:12,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2025-01-09 16:49:12,099 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-01-09 16:49:12,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 180 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:12,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:12,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-01-09 16:49:12,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:12,607 INFO L124 PetriNetUnfolderBase]: 1998/3447 cut-off events. [2025-01-09 16:49:12,607 INFO L125 PetriNetUnfolderBase]: For 3501/3501 co-relation queries the response was YES. [2025-01-09 16:49:12,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8738 conditions, 3447 events. 1998/3447 cut-off events. For 3501/3501 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 18218 event pairs, 251 based on Foata normal form. 24/2936 useless extension candidates. Maximal degree in co-relation 8723. Up to 625 conditions per place. [2025-01-09 16:49:12,616 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 98 selfloop transitions, 31 changer transitions 54/186 dead transitions. [2025-01-09 16:49:12,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 186 transitions, 1073 flow [2025-01-09 16:49:12,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-09 16:49:12,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-01-09 16:49:12,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 245 transitions. [2025-01-09 16:49:12,619 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6730769230769231 [2025-01-09 16:49:12,619 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 180 flow. Second operand 13 states and 245 transitions. [2025-01-09 16:49:12,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 186 transitions, 1073 flow [2025-01-09 16:49:12,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 186 transitions, 1043 flow, removed 12 selfloop flow, removed 5 redundant places. [2025-01-09 16:49:12,626 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 554 flow [2025-01-09 16:49:12,627 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=554, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2025-01-09 16:49:12,627 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 36 predicate places. [2025-01-09 16:49:12,629 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 554 flow [2025-01-09 16:49:12,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:12,629 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:12,629 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:12,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-09 16:49:12,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:12,830 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:12,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:12,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1613127306, now seen corresponding path program 5 times [2025-01-09 16:49:12,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:12,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865935891] [2025-01-09 16:49:12,831 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:49:12,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:12,841 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 38 statements into 3 equivalence classes. [2025-01-09 16:49:12,854 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 38 of 38 statements. [2025-01-09 16:49:12,857 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-09 16:49:12,857 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-09 16:49:12,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:12,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865935891] [2025-01-09 16:49:12,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865935891] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:12,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237270879] [2025-01-09 16:49:12,997 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:49:12,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:12,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:13,003 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:13,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-09 16:49:13,043 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 38 statements into 3 equivalence classes. [2025-01-09 16:49:13,063 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 38 of 38 statements. [2025-01-09 16:49:13,063 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-01-09 16:49:13,063 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:13,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-09 16:49:13,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-01-09 16:49:13,173 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-01-09 16:49:13,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237270879] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:13,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:13,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2025-01-09 16:49:13,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731659974] [2025-01-09 16:49:13,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:13,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-09 16:49:13,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:13,285 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-09 16:49:13,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2025-01-09 16:49:13,285 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-01-09 16:49:13,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 554 flow. Second operand has 20 states, 20 states have (on average 8.25) internal successors, (165), 20 states have internal predecessors, (165), 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) [2025-01-09 16:49:13,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:13,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-01-09 16:49:13,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:13,897 INFO L124 PetriNetUnfolderBase]: 2573/4505 cut-off events. [2025-01-09 16:49:13,897 INFO L125 PetriNetUnfolderBase]: For 7949/7949 co-relation queries the response was YES. [2025-01-09 16:49:13,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12066 conditions, 4505 events. 2573/4505 cut-off events. For 7949/7949 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 26602 event pairs, 1832 based on Foata normal form. 52/3847 useless extension candidates. Maximal degree in co-relation 12042. Up to 3442 conditions per place. [2025-01-09 16:49:13,911 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 53 selfloop transitions, 4 changer transitions 81/141 dead transitions. [2025-01-09 16:49:13,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 141 transitions, 1093 flow [2025-01-09 16:49:13,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-09 16:49:13,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-09 16:49:13,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 161 transitions. [2025-01-09 16:49:13,912 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2025-01-09 16:49:13,912 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 554 flow. Second operand 11 states and 161 transitions. [2025-01-09 16:49:13,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 141 transitions, 1093 flow [2025-01-09 16:49:13,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 141 transitions, 905 flow, removed 89 selfloop flow, removed 2 redundant places. [2025-01-09 16:49:13,935 INFO L231 Difference]: Finished difference. Result has 78 places, 60 transitions, 424 flow [2025-01-09 16:49:13,935 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=424, PETRI_PLACES=78, PETRI_TRANSITIONS=60} [2025-01-09 16:49:13,936 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 51 predicate places. [2025-01-09 16:49:13,936 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 60 transitions, 424 flow [2025-01-09 16:49:13,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.25) internal successors, (165), 20 states have internal predecessors, (165), 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) [2025-01-09 16:49:13,936 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:13,936 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:13,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-09 16:49:14,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:14,142 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:14,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:14,143 INFO L85 PathProgramCache]: Analyzing trace with hash -693863789, now seen corresponding path program 6 times [2025-01-09 16:49:14,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:14,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000231733] [2025-01-09 16:49:14,143 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:49:14,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:14,155 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 39 statements into 3 equivalence classes. [2025-01-09 16:49:14,191 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 39 of 39 statements. [2025-01-09 16:49:14,191 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-09 16:49:14,191 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 16:49:14,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:14,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000231733] [2025-01-09 16:49:14,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000231733] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:14,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208254869] [2025-01-09 16:49:14,500 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:49:14,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:14,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:14,505 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:14,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-09 16:49:14,545 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 39 statements into 3 equivalence classes. [2025-01-09 16:49:14,566 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 39 of 39 statements. [2025-01-09 16:49:14,566 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-01-09 16:49:14,566 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:14,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-01-09 16:49:14,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:14,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 16:49:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 16:49:14,960 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:15,383 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 42 treesize of output 38 [2025-01-09 16:49:15,391 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-01-09 16:49:15,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 45 [2025-01-09 16:49:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 16:49:15,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208254869] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:15,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:15,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2025-01-09 16:49:15,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596250863] [2025-01-09 16:49:15,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:15,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-01-09 16:49:15,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:15,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-01-09 16:49:15,539 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2025-01-09 16:49:15,539 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-01-09 16:49:15,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 60 transitions, 424 flow. Second operand has 27 states, 27 states have (on average 8.074074074074074) internal successors, (218), 27 states have internal predecessors, (218), 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) [2025-01-09 16:49:15,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:15,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-01-09 16:49:15,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:17,177 INFO L124 PetriNetUnfolderBase]: 6191/10654 cut-off events. [2025-01-09 16:49:17,177 INFO L125 PetriNetUnfolderBase]: For 8874/8874 co-relation queries the response was YES. [2025-01-09 16:49:17,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26029 conditions, 10654 events. 6191/10654 cut-off events. For 8874/8874 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 69219 event pairs, 1109 based on Foata normal form. 5/9002 useless extension candidates. Maximal degree in co-relation 25999. Up to 2858 conditions per place. [2025-01-09 16:49:17,208 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 61 selfloop transitions, 8 changer transitions 261/333 dead transitions. [2025-01-09 16:49:17,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 333 transitions, 2245 flow [2025-01-09 16:49:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-01-09 16:49:17,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-01-09 16:49:17,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 334 transitions. [2025-01-09 16:49:17,210 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2025-01-09 16:49:17,210 INFO L175 Difference]: Start difference. First operand has 78 places, 60 transitions, 424 flow. Second operand 21 states and 334 transitions. [2025-01-09 16:49:17,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 333 transitions, 2245 flow [2025-01-09 16:49:17,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 333 transitions, 2133 flow, removed 53 selfloop flow, removed 9 redundant places. [2025-01-09 16:49:17,238 INFO L231 Difference]: Finished difference. Result has 97 places, 61 transitions, 564 flow [2025-01-09 16:49:17,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=564, PETRI_PLACES=97, PETRI_TRANSITIONS=61} [2025-01-09 16:49:17,238 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 70 predicate places. [2025-01-09 16:49:17,239 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 61 transitions, 564 flow [2025-01-09 16:49:17,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 8.074074074074074) internal successors, (218), 27 states have internal predecessors, (218), 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) [2025-01-09 16:49:17,239 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:17,239 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:17,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-09 16:49:17,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-01-09 16:49:17,443 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:17,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:17,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1594642262, now seen corresponding path program 7 times [2025-01-09 16:49:17,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:17,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487505091] [2025-01-09 16:49:17,444 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:49:17,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:17,450 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-01-09 16:49:17,470 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-01-09 16:49:17,471 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:17,471 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:49:17,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:17,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487505091] [2025-01-09 16:49:17,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487505091] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:17,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275040476] [2025-01-09 16:49:17,804 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:49:17,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:17,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:17,806 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:17,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-09 16:49:17,849 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-01-09 16:49:17,866 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-01-09 16:49:17,866 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:17,866 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:17,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-09 16:49:17,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-09 16:49:18,007 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:18,030 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-01-09 16:49:18,030 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 28 treesize of output 11 [2025-01-09 16:49:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-09 16:49:18,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275040476] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:18,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:18,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 17 [2025-01-09 16:49:18,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029213427] [2025-01-09 16:49:18,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:18,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 16:49:18,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:18,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 16:49:18,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2025-01-09 16:49:18,050 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-01-09 16:49:18,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 61 transitions, 564 flow. Second operand has 18 states, 18 states have (on average 8.722222222222221) internal successors, (157), 18 states have internal predecessors, (157), 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) [2025-01-09 16:49:18,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:18,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-01-09 16:49:18,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:18,963 INFO L124 PetriNetUnfolderBase]: 2478/4265 cut-off events. [2025-01-09 16:49:18,964 INFO L125 PetriNetUnfolderBase]: For 8831/8831 co-relation queries the response was YES. [2025-01-09 16:49:18,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11736 conditions, 4265 events. 2478/4265 cut-off events. For 8831/8831 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 23311 event pairs, 176 based on Foata normal form. 2/3606 useless extension candidates. Maximal degree in co-relation 11698. Up to 786 conditions per place. [2025-01-09 16:49:18,979 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 123 selfloop transitions, 42 changer transitions 57/225 dead transitions. [2025-01-09 16:49:18,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 225 transitions, 1532 flow [2025-01-09 16:49:18,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-01-09 16:49:18,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-01-09 16:49:18,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 288 transitions. [2025-01-09 16:49:18,981 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-01-09 16:49:18,981 INFO L175 Difference]: Start difference. First operand has 97 places, 61 transitions, 564 flow. Second operand 18 states and 288 transitions. [2025-01-09 16:49:18,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 225 transitions, 1532 flow [2025-01-09 16:49:19,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 225 transitions, 1262 flow, removed 128 selfloop flow, removed 17 redundant places. [2025-01-09 16:49:19,012 INFO L231 Difference]: Finished difference. Result has 85 places, 69 transitions, 557 flow [2025-01-09 16:49:19,012 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=557, PETRI_PLACES=85, PETRI_TRANSITIONS=69} [2025-01-09 16:49:19,013 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 58 predicate places. [2025-01-09 16:49:19,013 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 69 transitions, 557 flow [2025-01-09 16:49:19,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.722222222222221) internal successors, (157), 18 states have internal predecessors, (157), 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) [2025-01-09 16:49:19,013 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:19,013 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:19,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-09 16:49:19,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-01-09 16:49:19,214 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:19,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:19,215 INFO L85 PathProgramCache]: Analyzing trace with hash -252690030, now seen corresponding path program 8 times [2025-01-09 16:49:19,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:19,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208287284] [2025-01-09 16:49:19,215 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:49:19,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:19,220 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-01-09 16:49:19,227 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-01-09 16:49:19,227 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:49:19,227 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-09 16:49:19,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:19,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208287284] [2025-01-09 16:49:19,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208287284] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:19,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782226344] [2025-01-09 16:49:19,297 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:49:19,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:19,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:19,299 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:19,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-09 16:49:19,341 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-01-09 16:49:19,360 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-01-09 16:49:19,360 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:49:19,360 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:19,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 16:49:19,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:19,393 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-09 16:49:19,393 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-09 16:49:19,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782226344] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:19,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:19,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2025-01-09 16:49:19,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828591664] [2025-01-09 16:49:19,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:19,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-09 16:49:19,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:19,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-09 16:49:19,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-01-09 16:49:19,439 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-01-09 16:49:19,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 69 transitions, 557 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:19,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:19,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-01-09 16:49:19,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:20,016 INFO L124 PetriNetUnfolderBase]: 4786/8215 cut-off events. [2025-01-09 16:49:20,016 INFO L125 PetriNetUnfolderBase]: For 8299/8299 co-relation queries the response was YES. [2025-01-09 16:49:20,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20483 conditions, 8215 events. 4786/8215 cut-off events. For 8299/8299 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 49784 event pairs, 1057 based on Foata normal form. 22/6965 useless extension candidates. Maximal degree in co-relation 20455. Up to 2068 conditions per place. [2025-01-09 16:49:20,070 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 96 selfloop transitions, 64 changer transitions 0/163 dead transitions. [2025-01-09 16:49:20,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 163 transitions, 1461 flow [2025-01-09 16:49:20,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 16:49:20,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-09 16:49:20,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2025-01-09 16:49:20,075 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2025-01-09 16:49:20,075 INFO L175 Difference]: Start difference. First operand has 85 places, 69 transitions, 557 flow. Second operand 6 states and 114 transitions. [2025-01-09 16:49:20,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 163 transitions, 1461 flow [2025-01-09 16:49:20,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 163 transitions, 1351 flow, removed 42 selfloop flow, removed 8 redundant places. [2025-01-09 16:49:20,116 INFO L231 Difference]: Finished difference. Result has 83 places, 107 transitions, 979 flow [2025-01-09 16:49:20,116 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=979, PETRI_PLACES=83, PETRI_TRANSITIONS=107} [2025-01-09 16:49:20,116 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 56 predicate places. [2025-01-09 16:49:20,116 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 107 transitions, 979 flow [2025-01-09 16:49:20,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:20,118 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:20,118 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:20,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-09 16:49:20,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-01-09 16:49:20,319 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:20,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:20,323 INFO L85 PathProgramCache]: Analyzing trace with hash -568652969, now seen corresponding path program 9 times [2025-01-09 16:49:20,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:20,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815740592] [2025-01-09 16:49:20,323 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:49:20,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:20,338 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 46 statements into 4 equivalence classes. [2025-01-09 16:49:20,375 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 46 of 46 statements. [2025-01-09 16:49:20,376 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-09 16:49:20,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-09 16:49:20,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:20,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815740592] [2025-01-09 16:49:20,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815740592] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:20,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492734394] [2025-01-09 16:49:20,633 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:49:20,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:20,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:20,635 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:20,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-09 16:49:20,679 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 46 statements into 4 equivalence classes. [2025-01-09 16:49:20,783 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 46 of 46 statements. [2025-01-09 16:49:20,783 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-09 16:49:20,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:20,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-01-09 16:49:20,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:21,029 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-01-09 16:49:21,029 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 26 treesize of output 10 [2025-01-09 16:49:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-09 16:49:21,040 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:21,065 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-01-09 16:49:21,065 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 27 treesize of output 11 [2025-01-09 16:49:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-09 16:49:21,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492734394] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:21,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:21,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2025-01-09 16:49:21,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249037214] [2025-01-09 16:49:21,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:21,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-01-09 16:49:21,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:21,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-01-09 16:49:21,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2025-01-09 16:49:21,340 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-01-09 16:49:21,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 107 transitions, 979 flow. Second operand has 32 states, 32 states have (on average 7.875) internal successors, (252), 32 states have internal predecessors, (252), 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) [2025-01-09 16:49:21,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:21,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-01-09 16:49:21,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:23,203 INFO L124 PetriNetUnfolderBase]: 15185/26019 cut-off events. [2025-01-09 16:49:23,203 INFO L125 PetriNetUnfolderBase]: For 29389/29389 co-relation queries the response was YES. [2025-01-09 16:49:23,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67158 conditions, 26019 events. 15185/26019 cut-off events. For 29389/29389 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 190595 event pairs, 3219 based on Foata normal form. 5/21990 useless extension candidates. Maximal degree in co-relation 67130. Up to 5931 conditions per place. [2025-01-09 16:49:23,293 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 224 selfloop transitions, 52 changer transitions 171/450 dead transitions. [2025-01-09 16:49:23,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 450 transitions, 4420 flow [2025-01-09 16:49:23,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-09 16:49:23,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-01-09 16:49:23,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 249 transitions. [2025-01-09 16:49:23,294 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.523109243697479 [2025-01-09 16:49:23,294 INFO L175 Difference]: Start difference. First operand has 83 places, 107 transitions, 979 flow. Second operand 17 states and 249 transitions. [2025-01-09 16:49:23,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 450 transitions, 4420 flow [2025-01-09 16:49:23,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 450 transitions, 4420 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-01-09 16:49:23,413 INFO L231 Difference]: Finished difference. Result has 104 places, 138 transitions, 1610 flow [2025-01-09 16:49:23,413 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1610, PETRI_PLACES=104, PETRI_TRANSITIONS=138} [2025-01-09 16:49:23,414 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 77 predicate places. [2025-01-09 16:49:23,414 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 138 transitions, 1610 flow [2025-01-09 16:49:23,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 7.875) internal successors, (252), 32 states have internal predecessors, (252), 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) [2025-01-09 16:49:23,414 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:23,414 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:23,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-01-09 16:49:23,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:23,619 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:23,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:23,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1089234845, now seen corresponding path program 10 times [2025-01-09 16:49:23,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:23,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449389089] [2025-01-09 16:49:23,620 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:49:23,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:23,625 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 46 statements into 2 equivalence classes. [2025-01-09 16:49:23,632 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-01-09 16:49:23,633 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:49:23,633 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-09 16:49:23,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:23,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449389089] [2025-01-09 16:49:23,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449389089] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:23,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040095475] [2025-01-09 16:49:23,896 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:49:23,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:23,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:23,901 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:23,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-09 16:49:23,944 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 46 statements into 2 equivalence classes. [2025-01-09 16:49:23,966 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-01-09 16:49:23,966 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:49:23,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:23,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-01-09 16:49:23,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-09 16:49:24,212 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:24,315 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-01-09 16:49:24,316 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 28 treesize of output 11 [2025-01-09 16:49:24,427 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-09 16:49:24,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040095475] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:24,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:24,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 27 [2025-01-09 16:49:24,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308831215] [2025-01-09 16:49:24,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:24,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-01-09 16:49:24,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:24,428 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-01-09 16:49:24,428 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2025-01-09 16:49:24,428 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-01-09 16:49:24,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 138 transitions, 1610 flow. Second operand has 28 states, 28 states have (on average 8.928571428571429) internal successors, (250), 28 states have internal predecessors, (250), 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) [2025-01-09 16:49:24,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:24,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-01-09 16:49:24,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:29,123 INFO L124 PetriNetUnfolderBase]: 24378/42208 cut-off events. [2025-01-09 16:49:29,123 INFO L125 PetriNetUnfolderBase]: For 67674/67674 co-relation queries the response was YES. [2025-01-09 16:49:29,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110558 conditions, 42208 events. 24378/42208 cut-off events. For 67674/67674 co-relation queries the response was YES. Maximal size of possible extension queue 1024. Compared 331690 event pairs, 1280 based on Foata normal form. 74/35639 useless extension candidates. Maximal degree in co-relation 110524. Up to 7875 conditions per place. [2025-01-09 16:49:29,287 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 478 selfloop transitions, 265 changer transitions 199/945 dead transitions. [2025-01-09 16:49:29,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 945 transitions, 7516 flow [2025-01-09 16:49:29,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2025-01-09 16:49:29,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2025-01-09 16:49:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 1033 transitions. [2025-01-09 16:49:29,290 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6588010204081632 [2025-01-09 16:49:29,290 INFO L175 Difference]: Start difference. First operand has 104 places, 138 transitions, 1610 flow. Second operand 56 states and 1033 transitions. [2025-01-09 16:49:29,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 945 transitions, 7516 flow [2025-01-09 16:49:29,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 945 transitions, 7310 flow, removed 68 selfloop flow, removed 7 redundant places. [2025-01-09 16:49:29,645 INFO L231 Difference]: Finished difference. Result has 174 places, 310 transitions, 4373 flow [2025-01-09 16:49:29,645 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1492, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=4373, PETRI_PLACES=174, PETRI_TRANSITIONS=310} [2025-01-09 16:49:29,646 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 147 predicate places. [2025-01-09 16:49:29,646 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 310 transitions, 4373 flow [2025-01-09 16:49:29,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 8.928571428571429) internal successors, (250), 28 states have internal predecessors, (250), 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) [2025-01-09 16:49:29,646 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:29,646 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:29,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-01-09 16:49:29,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:29,847 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:29,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:29,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1432367762, now seen corresponding path program 11 times [2025-01-09 16:49:29,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:29,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682809729] [2025-01-09 16:49:29,847 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:49:29,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:29,858 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 49 statements into 5 equivalence classes. [2025-01-09 16:49:29,870 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 49 of 49 statements. [2025-01-09 16:49:29,871 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-01-09 16:49:29,871 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-09 16:49:30,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:30,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682809729] [2025-01-09 16:49:30,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682809729] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:30,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006436689] [2025-01-09 16:49:30,013 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:49:30,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:30,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:30,015 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:30,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-09 16:49:30,057 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 49 statements into 5 equivalence classes. [2025-01-09 16:49:30,080 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 49 of 49 statements. [2025-01-09 16:49:30,080 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-01-09 16:49:30,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:30,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-09 16:49:30,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-09 16:49:30,232 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-09 16:49:30,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006436689] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:30,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:30,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2025-01-09 16:49:30,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472776049] [2025-01-09 16:49:30,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:30,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-01-09 16:49:30,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:30,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-01-09 16:49:30,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2025-01-09 16:49:30,393 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-01-09 16:49:30,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 310 transitions, 4373 flow. Second operand has 30 states, 30 states have (on average 7.833333333333333) internal successors, (235), 30 states have internal predecessors, (235), 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) [2025-01-09 16:49:30,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:30,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-01-09 16:49:30,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:33,358 INFO L124 PetriNetUnfolderBase]: 14458/24914 cut-off events. [2025-01-09 16:49:33,358 INFO L125 PetriNetUnfolderBase]: For 72745/72745 co-relation queries the response was YES. [2025-01-09 16:49:33,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71915 conditions, 24914 events. 14458/24914 cut-off events. For 72745/72745 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 183836 event pairs, 11432 based on Foata normal form. 122/21149 useless extension candidates. Maximal degree in co-relation 71859. Up to 21142 conditions per place. [2025-01-09 16:49:33,782 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 256 selfloop transitions, 6 changer transitions 97/362 dead transitions. [2025-01-09 16:49:33,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 362 transitions, 4968 flow [2025-01-09 16:49:33,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 16:49:33,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-01-09 16:49:33,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 161 transitions. [2025-01-09 16:49:33,788 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2025-01-09 16:49:33,789 INFO L175 Difference]: Start difference. First operand has 174 places, 310 transitions, 4373 flow. Second operand 12 states and 161 transitions. [2025-01-09 16:49:33,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 362 transitions, 4968 flow [2025-01-09 16:49:34,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 362 transitions, 3980 flow, removed 466 selfloop flow, removed 11 redundant places. [2025-01-09 16:49:34,382 INFO L231 Difference]: Finished difference. Result has 176 places, 265 transitions, 2721 flow [2025-01-09 16:49:34,382 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2899, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2721, PETRI_PLACES=176, PETRI_TRANSITIONS=265} [2025-01-09 16:49:34,383 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 149 predicate places. [2025-01-09 16:49:34,383 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 265 transitions, 2721 flow [2025-01-09 16:49:34,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.833333333333333) internal successors, (235), 30 states have internal predecessors, (235), 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) [2025-01-09 16:49:34,383 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:34,383 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:34,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-01-09 16:49:34,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:34,584 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:34,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:34,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1610951657, now seen corresponding path program 12 times [2025-01-09 16:49:34,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:34,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501329205] [2025-01-09 16:49:34,585 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:49:34,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:34,594 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 50 statements into 4 equivalence classes. [2025-01-09 16:49:34,638 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 50 of 50 statements. [2025-01-09 16:49:34,638 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-01-09 16:49:34,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:49:35,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:35,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501329205] [2025-01-09 16:49:35,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501329205] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:35,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757830481] [2025-01-09 16:49:35,050 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:49:35,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:35,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:35,057 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:35,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-09 16:49:35,103 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 50 statements into 4 equivalence classes. [2025-01-09 16:49:35,208 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) and asserted 50 of 50 statements. [2025-01-09 16:49:35,208 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2025-01-09 16:49:35,208 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:35,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-09 16:49:35,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:35,308 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-01-09 16:49:35,308 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:35,335 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-01-09 16:49:35,335 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 28 treesize of output 11 [2025-01-09 16:49:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-01-09 16:49:35,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757830481] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:35,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:35,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 21 [2025-01-09 16:49:35,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073444720] [2025-01-09 16:49:35,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:35,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-01-09 16:49:35,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:35,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-01-09 16:49:35,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2025-01-09 16:49:35,365 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-01-09 16:49:35,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 265 transitions, 2721 flow. Second operand has 22 states, 22 states have (on average 8.318181818181818) internal successors, (183), 22 states have internal predecessors, (183), 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) [2025-01-09 16:49:35,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:35,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-01-09 16:49:35,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:49:43,753 INFO L124 PetriNetUnfolderBase]: 42060/71725 cut-off events. [2025-01-09 16:49:43,753 INFO L125 PetriNetUnfolderBase]: For 127771/127771 co-relation queries the response was YES. [2025-01-09 16:49:44,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184524 conditions, 71725 events. 42060/71725 cut-off events. For 127771/127771 co-relation queries the response was YES. Maximal size of possible extension queue 1278. Compared 581905 event pairs, 4625 based on Foata normal form. 47/60699 useless extension candidates. Maximal degree in co-relation 184469. Up to 13150 conditions per place. [2025-01-09 16:49:44,393 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 677 selfloop transitions, 673 changer transitions 129/1482 dead transitions. [2025-01-09 16:49:44,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 1482 transitions, 13494 flow [2025-01-09 16:49:44,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2025-01-09 16:49:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2025-01-09 16:49:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 1039 transitions. [2025-01-09 16:49:44,395 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6289346246973365 [2025-01-09 16:49:44,395 INFO L175 Difference]: Start difference. First operand has 176 places, 265 transitions, 2721 flow. Second operand 59 states and 1039 transitions. [2025-01-09 16:49:44,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 1482 transitions, 13494 flow [2025-01-09 16:49:45,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 1482 transitions, 13309 flow, removed 79 selfloop flow, removed 13 redundant places. [2025-01-09 16:49:45,436 INFO L231 Difference]: Finished difference. Result has 234 places, 844 transitions, 9951 flow [2025-01-09 16:49:45,436 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2625, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=9951, PETRI_PLACES=234, PETRI_TRANSITIONS=844} [2025-01-09 16:49:45,436 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 207 predicate places. [2025-01-09 16:49:45,437 INFO L471 AbstractCegarLoop]: Abstraction has has 234 places, 844 transitions, 9951 flow [2025-01-09 16:49:45,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.318181818181818) internal successors, (183), 22 states have internal predecessors, (183), 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) [2025-01-09 16:49:45,437 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:49:45,437 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:49:45,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-01-09 16:49:45,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-01-09 16:49:45,638 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:49:45,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:49:45,638 INFO L85 PathProgramCache]: Analyzing trace with hash 773554919, now seen corresponding path program 13 times [2025-01-09 16:49:45,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:49:45,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486778926] [2025-01-09 16:49:45,638 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:49:45,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:49:45,646 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-01-09 16:49:45,666 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-01-09 16:49:45,667 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:45,667 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:49:46,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:49:46,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486778926] [2025-01-09 16:49:46,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486778926] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:49:46,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952512544] [2025-01-09 16:49:46,106 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:49:46,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:49:46,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:49:46,108 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:49:46,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-09 16:49:46,156 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-01-09 16:49:46,179 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-01-09 16:49:46,179 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:49:46,179 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:49:46,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-09 16:49:46,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:49:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-01-09 16:49:46,460 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:49:46,492 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-01-09 16:49:46,492 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 28 treesize of output 11 [2025-01-09 16:49:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-01-09 16:49:46,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952512544] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:49:46,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:49:46,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 12] total 27 [2025-01-09 16:49:46,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213465796] [2025-01-09 16:49:46,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:49:46,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-01-09 16:49:46,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:49:46,519 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-01-09 16:49:46,519 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2025-01-09 16:49:46,519 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2025-01-09 16:49:46,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 844 transitions, 9951 flow. Second operand has 28 states, 28 states have (on average 8.321428571428571) internal successors, (233), 28 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:49:46,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:49:46,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2025-01-09 16:49:46,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:04,345 INFO L124 PetriNetUnfolderBase]: 69820/118881 cut-off events. [2025-01-09 16:50:04,345 INFO L125 PetriNetUnfolderBase]: For 346367/346367 co-relation queries the response was YES. [2025-01-09 16:50:05,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318564 conditions, 118881 events. 69820/118881 cut-off events. For 346367/346367 co-relation queries the response was YES. Maximal size of possible extension queue 1720. Compared 1025603 event pairs, 16332 based on Foata normal form. 107/100627 useless extension candidates. Maximal degree in co-relation 318492. Up to 21825 conditions per place. [2025-01-09 16:50:06,095 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 671 selfloop transitions, 966 changer transitions 93/1733 dead transitions. [2025-01-09 16:50:06,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 1733 transitions, 19816 flow [2025-01-09 16:50:06,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-01-09 16:50:06,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-01-09 16:50:06,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 456 transitions. [2025-01-09 16:50:06,097 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2025-01-09 16:50:06,097 INFO L175 Difference]: Start difference. First operand has 234 places, 844 transitions, 9951 flow. Second operand 28 states and 456 transitions. [2025-01-09 16:50:06,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 1733 transitions, 19816 flow