./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 07:16:39,306 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 07:16:39,399 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 07:16:39,405 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 07:16:39,406 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 07:16:39,434 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 07:16:39,435 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 07:16:39,435 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 07:16:39,437 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 07:16:39,438 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 07:16:39,438 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 07:16:39,439 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 07:16:39,439 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 07:16:39,442 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 07:16:39,442 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 07:16:39,442 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 07:16:39,443 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 07:16:39,443 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 07:16:39,443 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 07:16:39,443 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 07:16:39,444 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 07:16:39,446 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 07:16:39,447 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 07:16:39,449 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 07:16:39,449 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 07:16:39,449 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 07:16:39,450 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 07:16:39,450 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 07:16:39,450 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 07:16:39,450 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 07:16:39,451 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 07:16:39,451 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 07:16:39,451 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:16:39,451 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 07:16:39,451 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 07:16:39,452 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 07:16:39,452 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 07:16:39,452 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 07:16:39,453 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 07:16:39,453 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 07:16:39,454 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 07:16:39,455 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 07:16:39,455 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e [2024-10-13 07:16:39,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 07:16:39,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 07:16:39,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 07:16:39,746 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 07:16:39,746 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 07:16:39,747 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c [2024-10-13 07:16:41,294 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 07:16:41,506 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 07:16:41,507 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c [2024-10-13 07:16:41,516 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05fc094d3/644d02ff5b42490eac9966ccbe401816/FLAG972120e39 [2024-10-13 07:16:41,887 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05fc094d3/644d02ff5b42490eac9966ccbe401816 [2024-10-13 07:16:41,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 07:16:41,891 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 07:16:41,892 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 07:16:41,892 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 07:16:41,900 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 07:16:41,901 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:41" (1/1) ... [2024-10-13 07:16:41,904 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60d4381 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:41, skipping insertion in model container [2024-10-13 07:16:41,905 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:41" (1/1) ... [2024-10-13 07:16:41,927 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 07:16:42,137 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c[2459,2472] [2024-10-13 07:16:42,149 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:16:42,158 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 07:16:42,178 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c[2459,2472] [2024-10-13 07:16:42,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:16:42,200 INFO L204 MainTranslator]: Completed translation [2024-10-13 07:16:42,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:42 WrapperNode [2024-10-13 07:16:42,201 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 07:16:42,202 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 07:16:42,202 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 07:16:42,202 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 07:16:42,209 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:42" (1/1) ... [2024-10-13 07:16:42,216 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:42" (1/1) ... [2024-10-13 07:16:42,238 INFO L138 Inliner]: procedures = 23, calls = 24, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 127 [2024-10-13 07:16:42,238 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 07:16:42,239 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 07:16:42,239 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 07:16:42,239 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 07:16:42,250 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:42" (1/1) ... [2024-10-13 07:16:42,250 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:42" (1/1) ... [2024-10-13 07:16:42,253 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:42" (1/1) ... [2024-10-13 07:16:42,269 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]. [2024-10-13 07:16:42,269 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:42" (1/1) ... [2024-10-13 07:16:42,269 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:42" (1/1) ... [2024-10-13 07:16:42,274 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:42" (1/1) ... [2024-10-13 07:16:42,278 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:42" (1/1) ... [2024-10-13 07:16:42,279 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:42" (1/1) ... [2024-10-13 07:16:42,281 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:42" (1/1) ... [2024-10-13 07:16:42,283 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 07:16:42,284 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 07:16:42,284 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 07:16:42,284 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 07:16:42,285 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:42" (1/1) ... [2024-10-13 07:16:42,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:16:42,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:16:42,315 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 07:16:42,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 07:16:42,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 07:16:42,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 07:16:42,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 07:16:42,365 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 07:16:42,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 07:16:42,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 07:16:42,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 07:16:42,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 07:16:42,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 07:16:42,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-13 07:16:42,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-13 07:16:42,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 07:16:42,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 07:16:42,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 07:16:42,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 07:16:42,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 07:16:42,368 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 07:16:42,465 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 07:16:42,470 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 07:16:42,704 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 07:16:42,705 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 07:16:42,910 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 07:16:42,911 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-13 07:16:42,911 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:42 BoogieIcfgContainer [2024-10-13 07:16:42,911 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 07:16:42,914 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 07:16:42,914 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 07:16:42,918 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 07:16:42,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:16:41" (1/3) ... [2024-10-13 07:16:42,919 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@120b7a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:16:42, skipping insertion in model container [2024-10-13 07:16:42,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:42" (2/3) ... [2024-10-13 07:16:42,919 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@120b7a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:16:42, skipping insertion in model container [2024-10-13 07:16:42,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:42" (3/3) ... [2024-10-13 07:16:42,921 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2024-10-13 07:16:42,934 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 07:16:42,935 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 07:16:42,935 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 07:16:42,989 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-13 07:16:43,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 28 transitions, 70 flow [2024-10-13 07:16:43,062 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2024-10-13 07:16:43,063 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:16:43,069 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. [2024-10-13 07:16:43,069 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 28 transitions, 70 flow [2024-10-13 07:16:43,072 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 25 transitions, 62 flow [2024-10-13 07:16:43,083 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 07:16:43,091 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;@16d3e915, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 07:16:43,091 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-13 07:16:43,105 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 07:16:43,106 INFO L124 PetriNetUnfolderBase]: 5/24 cut-off events. [2024-10-13 07:16:43,106 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:16:43,106 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:43,107 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:16:43,107 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:43,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:43,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1826755679, now seen corresponding path program 1 times [2024-10-13 07:16:43,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:43,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428583162] [2024-10-13 07:16:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:43,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:43,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:43,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:43,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428583162] [2024-10-13 07:16:43,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428583162] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:16:43,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:16:43,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:16:43,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950767112] [2024-10-13 07:16:43,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:16:43,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 07:16:43,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:43,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 07:16:43,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 07:16:43,373 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:16:43,375 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) [2024-10-13 07:16:43,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:43,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:16:43,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:16:43,495 INFO L124 PetriNetUnfolderBase]: 122/217 cut-off events. [2024-10-13 07:16:43,496 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-13 07:16:43,500 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 721 event pairs, 94 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 405. Up to 214 conditions per place. [2024-10-13 07:16:43,504 INFO L140 encePairwiseOnDemand]: 26/28 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2024-10-13 07:16:43,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 23 transitions, 98 flow [2024-10-13 07:16:43,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 07:16:43,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-13 07:16:43,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 32 transitions. [2024-10-13 07:16:43,518 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-10-13 07:16:43,521 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 62 flow. Second operand 2 states and 32 transitions. [2024-10-13 07:16:43,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 23 transitions, 98 flow [2024-10-13 07:16:43,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 23 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 07:16:43,526 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 50 flow [2024-10-13 07:16:43,528 INFO L260 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} [2024-10-13 07:16:43,533 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2024-10-13 07:16:43,533 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 50 flow [2024-10-13 07:16:43,533 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) [2024-10-13 07:16:43,533 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:43,533 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:16:43,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 07:16:43,534 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:43,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:43,535 INFO L85 PathProgramCache]: Analyzing trace with hash 5065408, now seen corresponding path program 1 times [2024-10-13 07:16:43,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:43,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912589968] [2024-10-13 07:16:43,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:43,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:43,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:43,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912589968] [2024-10-13 07:16:43,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912589968] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:16:43,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:16:43,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:16:43,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505241229] [2024-10-13 07:16:43,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:16:43,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:16:43,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:43,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:16:43,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:16:43,856 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:16:43,857 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) [2024-10-13 07:16:43,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:43,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:16:43,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:16:44,003 INFO L124 PetriNetUnfolderBase]: 203/353 cut-off events. [2024-10-13 07:16:44,003 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-13 07:16:44,004 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 1268 event pairs, 82 based on Foata normal form. 1/302 useless extension candidates. Maximal degree in co-relation 709. Up to 176 conditions per place. [2024-10-13 07:16:44,009 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 28 selfloop transitions, 2 changer transitions 3/36 dead transitions. [2024-10-13 07:16:44,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 36 transitions, 144 flow [2024-10-13 07:16:44,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:16:44,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:16:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-10-13 07:16:44,011 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-10-13 07:16:44,011 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 50 flow. Second operand 3 states and 49 transitions. [2024-10-13 07:16:44,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 36 transitions, 144 flow [2024-10-13 07:16:44,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 07:16:44,014 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 62 flow [2024-10-13 07:16:44,014 INFO L260 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} [2024-10-13 07:16:44,015 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2024-10-13 07:16:44,016 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 62 flow [2024-10-13 07:16:44,016 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) [2024-10-13 07:16:44,017 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:44,017 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:16:44,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 07:16:44,017 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:44,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:44,019 INFO L85 PathProgramCache]: Analyzing trace with hash -576454128, now seen corresponding path program 1 times [2024-10-13 07:16:44,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:44,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698403816] [2024-10-13 07:16:44,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:44,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:44,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:44,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:44,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698403816] [2024-10-13 07:16:44,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698403816] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:16:44,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:16:44,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:16:44,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242909890] [2024-10-13 07:16:44,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:16:44,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:16:44,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:44,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:16:44,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:16:44,198 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:16:44,198 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) [2024-10-13 07:16:44,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:44,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:16:44,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:16:44,322 INFO L124 PetriNetUnfolderBase]: 251/446 cut-off events. [2024-10-13 07:16:44,323 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-10-13 07:16:44,326 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 1647 event pairs, 113 based on Foata normal form. 11/386 useless extension candidates. Maximal degree in co-relation 934. Up to 306 conditions per place. [2024-10-13 07:16:44,329 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 27 selfloop transitions, 2 changer transitions 6/38 dead transitions. [2024-10-13 07:16:44,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 38 transitions, 163 flow [2024-10-13 07:16:44,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:16:44,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:16:44,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-10-13 07:16:44,333 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-10-13 07:16:44,333 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 62 flow. Second operand 3 states and 50 transitions. [2024-10-13 07:16:44,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 38 transitions, 163 flow [2024-10-13 07:16:44,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 38 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 07:16:44,335 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 72 flow [2024-10-13 07:16:44,335 INFO L260 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} [2024-10-13 07:16:44,336 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2024-10-13 07:16:44,337 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 72 flow [2024-10-13 07:16:44,338 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) [2024-10-13 07:16:44,338 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:44,338 INFO L204 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] [2024-10-13 07:16:44,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 07:16:44,338 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:44,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:44,339 INFO L85 PathProgramCache]: Analyzing trace with hash -685549057, now seen corresponding path program 1 times [2024-10-13 07:16:44,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:44,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460664561] [2024-10-13 07:16:44,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:44,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:44,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:44,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460664561] [2024-10-13 07:16:44,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460664561] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:16:44,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:16:44,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:16:44,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871748199] [2024-10-13 07:16:44,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:16:44,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:16:44,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:44,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:16:44,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:16:44,561 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:16:44,562 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) [2024-10-13 07:16:44,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:44,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:16:44,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:16:44,719 INFO L124 PetriNetUnfolderBase]: 319/585 cut-off events. [2024-10-13 07:16:44,719 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-10-13 07:16:44,723 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 2472 event pairs, 285 based on Foata normal form. 12/502 useless extension candidates. Maximal degree in co-relation 1262. Up to 443 conditions per place. [2024-10-13 07:16:44,725 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 21 selfloop transitions, 2 changer transitions 15/41 dead transitions. [2024-10-13 07:16:44,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 184 flow [2024-10-13 07:16:44,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:16:44,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:16:44,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 57 transitions. [2024-10-13 07:16:44,729 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-10-13 07:16:44,729 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 72 flow. Second operand 4 states and 57 transitions. [2024-10-13 07:16:44,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 184 flow [2024-10-13 07:16:44,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 07:16:44,733 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 84 flow [2024-10-13 07:16:44,733 INFO L260 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} [2024-10-13 07:16:44,734 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2024-10-13 07:16:44,735 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 84 flow [2024-10-13 07:16:44,735 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) [2024-10-13 07:16:44,735 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:44,736 INFO L204 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] [2024-10-13 07:16:44,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 07:16:44,736 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:44,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:44,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1526105098, now seen corresponding path program 1 times [2024-10-13 07:16:44,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:44,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277720729] [2024-10-13 07:16:44,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:44,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:16:45,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:45,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277720729] [2024-10-13 07:16:45,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277720729] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:16:45,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623403703] [2024-10-13 07:16:45,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:45,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:45,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:16:45,095 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:16:45,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 07:16:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:45,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 07:16:45,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:16:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:16:45,378 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:16:45,450 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 07:16:45,451 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 [2024-10-13 07:16:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:16:45,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623403703] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:16:45,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:16:45,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-10-13 07:16:45,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067229746] [2024-10-13 07:16:45,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:16:45,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 07:16:45,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:45,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 07:16:45,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-10-13 07:16:45,487 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:16:45,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 84 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-10-13 07:16:45,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:45,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:16:45,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:16:45,738 INFO L124 PetriNetUnfolderBase]: 331/583 cut-off events. [2024-10-13 07:16:45,738 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2024-10-13 07:16:45,740 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. 1/492 useless extension candidates. Maximal degree in co-relation 1281. Up to 157 conditions per place. [2024-10-13 07:16:45,742 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 44 selfloop transitions, 5 changer transitions 12/64 dead transitions. [2024-10-13 07:16:45,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 64 transitions, 295 flow [2024-10-13 07:16:45,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:16:45,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:16:45,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2024-10-13 07:16:45,746 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-10-13 07:16:45,746 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 84 flow. Second operand 6 states and 91 transitions. [2024-10-13 07:16:45,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 64 transitions, 295 flow [2024-10-13 07:16:45,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 64 transitions, 289 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-10-13 07:16:45,749 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 98 flow [2024-10-13 07:16:45,752 INFO L260 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} [2024-10-13 07:16:45,754 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2024-10-13 07:16:45,754 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 98 flow [2024-10-13 07:16:45,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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) [2024-10-13 07:16:45,754 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:45,754 INFO L204 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] [2024-10-13 07:16:45,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 07:16:45,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:45,956 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:45,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:45,957 INFO L85 PathProgramCache]: Analyzing trace with hash -921432716, now seen corresponding path program 2 times [2024-10-13 07:16:45,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:45,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771620361] [2024-10-13 07:16:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:45,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:16:46,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:46,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771620361] [2024-10-13 07:16:46,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771620361] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:16:46,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671266778] [2024-10-13 07:16:46,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:16:46,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:46,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:16:46,043 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:16:46,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 07:16:46,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:16:46,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:16:46,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 07:16:46,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:16:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:16:46,273 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:16:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:16:46,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671266778] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:16:46,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:16:46,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2024-10-13 07:16:46,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003461464] [2024-10-13 07:16:46,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:16:46,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 07:16:46,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:46,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 07:16:46,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-10-13 07:16:46,451 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:16:46,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 98 flow. Second operand has 13 states, 13 states have (on average 9.846153846153847) internal successors, (128), 13 states have internal predecessors, (128), 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) [2024-10-13 07:16:46,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:46,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:16:46,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:16:46,839 INFO L124 PetriNetUnfolderBase]: 948/1687 cut-off events. [2024-10-13 07:16:46,839 INFO L125 PetriNetUnfolderBase]: For 548/548 co-relation queries the response was YES. [2024-10-13 07:16:46,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3769 conditions, 1687 events. 948/1687 cut-off events. For 548/548 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 8087 event pairs, 348 based on Foata normal form. 43/1465 useless extension candidates. Maximal degree in co-relation 3761. Up to 462 conditions per place. [2024-10-13 07:16:46,847 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 49 selfloop transitions, 9 changer transitions 42/103 dead transitions. [2024-10-13 07:16:46,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 103 transitions, 512 flow [2024-10-13 07:16:46,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 07:16:46,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 07:16:46,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-10-13 07:16:46,849 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-10-13 07:16:46,849 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 98 flow. Second operand 9 states and 143 transitions. [2024-10-13 07:16:46,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 103 transitions, 512 flow [2024-10-13 07:16:46,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 103 transitions, 495 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-10-13 07:16:46,854 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 170 flow [2024-10-13 07:16:46,854 INFO L260 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=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=170, PETRI_PLACES=45, PETRI_TRANSITIONS=33} [2024-10-13 07:16:46,855 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 18 predicate places. [2024-10-13 07:16:46,855 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 170 flow [2024-10-13 07:16:46,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 9.846153846153847) internal successors, (128), 13 states have internal predecessors, (128), 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) [2024-10-13 07:16:46,856 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:46,856 INFO L204 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] [2024-10-13 07:16:46,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-13 07:16:47,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-13 07:16:47,057 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:47,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:47,058 INFO L85 PathProgramCache]: Analyzing trace with hash 312778938, now seen corresponding path program 3 times [2024-10-13 07:16:47,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:47,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877184044] [2024-10-13 07:16:47,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:47,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:47,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:47,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:47,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877184044] [2024-10-13 07:16:47,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877184044] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:16:47,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243675404] [2024-10-13 07:16:47,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:16:47,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:47,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:16:47,588 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:16:47,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 07:16:47,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-13 07:16:47,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:16:47,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:16:47,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:16:47,969 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 07:16:47,969 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 [2024-10-13 07:16:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:47,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:16:48,050 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 07:16:48,051 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 [2024-10-13 07:16:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:48,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243675404] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:16:48,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:16:48,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-10-13 07:16:48,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637003091] [2024-10-13 07:16:48,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:16:48,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 07:16:48,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:48,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 07:16:48,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2024-10-13 07:16:48,315 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:16:48,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 33 transitions, 170 flow. Second operand has 22 states, 22 states have (on average 8.136363636363637) internal successors, (179), 22 states have internal predecessors, (179), 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) [2024-10-13 07:16:48,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:48,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:16:48,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:16:49,669 INFO L124 PetriNetUnfolderBase]: 2375/4137 cut-off events. [2024-10-13 07:16:49,669 INFO L125 PetriNetUnfolderBase]: For 2950/2950 co-relation queries the response was YES. [2024-10-13 07:16:49,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10120 conditions, 4137 events. 2375/4137 cut-off events. For 2950/2950 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 22913 event pairs, 448 based on Foata normal form. 21/3511 useless extension candidates. Maximal degree in co-relation 10107. Up to 750 conditions per place. [2024-10-13 07:16:49,687 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 138 selfloop transitions, 28 changer transitions 79/248 dead transitions. [2024-10-13 07:16:49,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 248 transitions, 1363 flow [2024-10-13 07:16:49,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-13 07:16:49,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-13 07:16:49,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 340 transitions. [2024-10-13 07:16:49,692 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-10-13 07:16:49,693 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 170 flow. Second operand 21 states and 340 transitions. [2024-10-13 07:16:49,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 248 transitions, 1363 flow [2024-10-13 07:16:49,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 248 transitions, 1327 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-10-13 07:16:49,708 INFO L231 Difference]: Finished difference. Result has 70 places, 53 transitions, 445 flow [2024-10-13 07:16:49,709 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=445, PETRI_PLACES=70, PETRI_TRANSITIONS=53} [2024-10-13 07:16:49,709 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 43 predicate places. [2024-10-13 07:16:49,710 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 53 transitions, 445 flow [2024-10-13 07:16:49,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.136363636363637) internal successors, (179), 22 states have internal predecessors, (179), 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) [2024-10-13 07:16:49,714 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:49,714 INFO L204 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] [2024-10-13 07:16:49,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 07:16:49,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:49,915 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:49,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:49,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1078660162, now seen corresponding path program 4 times [2024-10-13 07:16:49,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:49,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561024729] [2024-10-13 07:16:49,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:49,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:50,411 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:50,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:50,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561024729] [2024-10-13 07:16:50,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561024729] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:16:50,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198861527] [2024-10-13 07:16:50,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:16:50,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:50,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:16:50,418 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:16:50,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 07:16:50,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:16:50,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:16:50,504 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-13 07:16:50,505 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:16:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:16:50,753 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:16:50,836 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 07:16:50,836 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 [2024-10-13 07:16:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:16:50,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198861527] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:16:50,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:16:50,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 19 [2024-10-13 07:16:50,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168431155] [2024-10-13 07:16:50,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:16:50,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 07:16:50,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:50,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 07:16:50,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-10-13 07:16:50,934 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:16:50,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 53 transitions, 445 flow. Second operand has 20 states, 20 states have (on average 8.8) internal successors, (176), 20 states have internal predecessors, (176), 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) [2024-10-13 07:16:50,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:50,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:16:50,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:16:51,968 INFO L124 PetriNetUnfolderBase]: 2477/4299 cut-off events. [2024-10-13 07:16:51,969 INFO L125 PetriNetUnfolderBase]: For 8127/8127 co-relation queries the response was YES. [2024-10-13 07:16:51,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11831 conditions, 4299 events. 2477/4299 cut-off events. For 8127/8127 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 23264 event pairs, 428 based on Foata normal form. 3/3632 useless extension candidates. Maximal degree in co-relation 11808. Up to 875 conditions per place. [2024-10-13 07:16:51,999 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 140 selfloop transitions, 32 changer transitions 36/211 dead transitions. [2024-10-13 07:16:52,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 211 transitions, 1455 flow [2024-10-13 07:16:52,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-13 07:16:52,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-13 07:16:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 269 transitions. [2024-10-13 07:16:52,001 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5651260504201681 [2024-10-13 07:16:52,001 INFO L175 Difference]: Start difference. First operand has 70 places, 53 transitions, 445 flow. Second operand 17 states and 269 transitions. [2024-10-13 07:16:52,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 211 transitions, 1455 flow [2024-10-13 07:16:52,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 211 transitions, 1305 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-10-13 07:16:52,032 INFO L231 Difference]: Finished difference. Result has 80 places, 62 transitions, 532 flow [2024-10-13 07:16:52,032 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=532, PETRI_PLACES=80, PETRI_TRANSITIONS=62} [2024-10-13 07:16:52,035 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 53 predicate places. [2024-10-13 07:16:52,035 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 62 transitions, 532 flow [2024-10-13 07:16:52,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.8) internal successors, (176), 20 states have internal predecessors, (176), 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) [2024-10-13 07:16:52,039 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:52,039 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:16:52,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 07:16:52,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:52,244 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:52,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:52,244 INFO L85 PathProgramCache]: Analyzing trace with hash 427032896, now seen corresponding path program 5 times [2024-10-13 07:16:52,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:52,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792090946] [2024-10-13 07:16:52,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:52,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:16:52,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:52,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792090946] [2024-10-13 07:16:52,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792090946] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:16:52,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373709108] [2024-10-13 07:16:52,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:16:52,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:52,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:16:52,369 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:16:52,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 07:16:52,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-13 07:16:52,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:16:52,453 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 07:16:52,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:16:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 07:16:52,499 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:16:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 07:16:52,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373709108] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:16:52,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:16:52,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2024-10-13 07:16:52,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008842501] [2024-10-13 07:16:52,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:16:52,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 07:16:52,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:52,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 07:16:52,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-13 07:16:52,549 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:16:52,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 62 transitions, 532 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:16:52,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:52,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:16:52,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:16:53,366 INFO L124 PetriNetUnfolderBase]: 4762/8240 cut-off events. [2024-10-13 07:16:53,367 INFO L125 PetriNetUnfolderBase]: For 14345/14345 co-relation queries the response was YES. [2024-10-13 07:16:53,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22173 conditions, 8240 events. 4762/8240 cut-off events. For 14345/14345 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 51105 event pairs, 1467 based on Foata normal form. 55/7013 useless extension candidates. Maximal degree in co-relation 22150. Up to 3046 conditions per place. [2024-10-13 07:16:53,420 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 88 selfloop transitions, 45 changer transitions 0/136 dead transitions. [2024-10-13 07:16:53,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 136 transitions, 1302 flow [2024-10-13 07:16:53,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:16:53,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:16:53,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-10-13 07:16:53,422 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6642857142857143 [2024-10-13 07:16:53,422 INFO L175 Difference]: Start difference. First operand has 80 places, 62 transitions, 532 flow. Second operand 5 states and 93 transitions. [2024-10-13 07:16:53,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 136 transitions, 1302 flow [2024-10-13 07:16:53,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 136 transitions, 1085 flow, removed 64 selfloop flow, removed 15 redundant places. [2024-10-13 07:16:53,443 INFO L231 Difference]: Finished difference. Result has 72 places, 94 transitions, 910 flow [2024-10-13 07:16:53,444 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=910, PETRI_PLACES=72, PETRI_TRANSITIONS=94} [2024-10-13 07:16:53,445 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 45 predicate places. [2024-10-13 07:16:53,446 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 94 transitions, 910 flow [2024-10-13 07:16:53,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:16:53,446 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:53,446 INFO L204 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] [2024-10-13 07:16:53,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 07:16:53,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:53,652 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:53,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:53,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1120363923, now seen corresponding path program 6 times [2024-10-13 07:16:53,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:53,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815579938] [2024-10-13 07:16:53,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:53,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:53,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-13 07:16:53,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:53,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815579938] [2024-10-13 07:16:53,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815579938] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:16:53,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008758073] [2024-10-13 07:16:53,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:16:53,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:53,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:16:53,969 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:16:53,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 07:16:54,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-13 07:16:54,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:16:54,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 07:16:54,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:16:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-13 07:16:54,282 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:16:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-13 07:16:54,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008758073] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:16:54,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:16:54,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-10-13 07:16:54,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897924881] [2024-10-13 07:16:54,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:16:54,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 07:16:54,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:54,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 07:16:54,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2024-10-13 07:16:54,514 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:16:54,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 94 transitions, 910 flow. Second operand has 20 states, 20 states have (on average 8.4) internal successors, (168), 20 states have internal predecessors, (168), 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) [2024-10-13 07:16:54,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:54,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:16:54,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:16:55,407 INFO L124 PetriNetUnfolderBase]: 2982/5214 cut-off events. [2024-10-13 07:16:55,407 INFO L125 PetriNetUnfolderBase]: For 10328/10328 co-relation queries the response was YES. [2024-10-13 07:16:55,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14409 conditions, 5214 events. 2982/5214 cut-off events. For 10328/10328 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 30396 event pairs, 2389 based on Foata normal form. 32/4431 useless extension candidates. Maximal degree in co-relation 14387. Up to 4518 conditions per place. [2024-10-13 07:16:55,439 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 54 selfloop transitions, 4 changer transitions 67/128 dead transitions. [2024-10-13 07:16:55,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 128 transitions, 989 flow [2024-10-13 07:16:55,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 07:16:55,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-13 07:16:55,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 143 transitions. [2024-10-13 07:16:55,440 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5107142857142857 [2024-10-13 07:16:55,441 INFO L175 Difference]: Start difference. First operand has 72 places, 94 transitions, 910 flow. Second operand 10 states and 143 transitions. [2024-10-13 07:16:55,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 128 transitions, 989 flow [2024-10-13 07:16:55,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 128 transitions, 907 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-10-13 07:16:55,473 INFO L231 Difference]: Finished difference. Result has 75 places, 61 transitions, 484 flow [2024-10-13 07:16:55,473 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=484, PETRI_PLACES=75, PETRI_TRANSITIONS=61} [2024-10-13 07:16:55,474 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 48 predicate places. [2024-10-13 07:16:55,474 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 61 transitions, 484 flow [2024-10-13 07:16:55,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.4) internal successors, (168), 20 states have internal predecessors, (168), 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) [2024-10-13 07:16:55,474 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:55,474 INFO L204 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] [2024-10-13 07:16:55,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-13 07:16:55,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:55,679 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:55,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:55,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1883401274, now seen corresponding path program 7 times [2024-10-13 07:16:55,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:55,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912713530] [2024-10-13 07:16:55,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:55,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:56,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:56,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912713530] [2024-10-13 07:16:56,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912713530] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:16:56,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666256727] [2024-10-13 07:16:56,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:16:56,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:56,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:16:56,203 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:16:56,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 07:16:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:56,287 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-13 07:16:56,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:16:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:16:56,501 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:16:56,591 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 07:16:56,592 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 [2024-10-13 07:16:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:16:56,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666256727] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:16:56,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:16:56,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 24 [2024-10-13 07:16:56,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977365540] [2024-10-13 07:16:56,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:16:56,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-13 07:16:56,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:56,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-13 07:16:56,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2024-10-13 07:16:56,674 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:16:56,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 61 transitions, 484 flow. Second operand has 25 states, 25 states have (on average 8.76) internal successors, (219), 25 states have internal predecessors, (219), 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) [2024-10-13 07:16:56,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:56,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:16:56,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:16:58,269 INFO L124 PetriNetUnfolderBase]: 4136/7098 cut-off events. [2024-10-13 07:16:58,269 INFO L125 PetriNetUnfolderBase]: For 7306/7306 co-relation queries the response was YES. [2024-10-13 07:16:58,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18324 conditions, 7098 events. 4136/7098 cut-off events. For 7306/7306 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 41842 event pairs, 320 based on Foata normal form. 20/6015 useless extension candidates. Maximal degree in co-relation 18304. Up to 1300 conditions per place. [2024-10-13 07:16:58,302 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 154 selfloop transitions, 62 changer transitions 78/297 dead transitions. [2024-10-13 07:16:58,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 297 transitions, 1817 flow [2024-10-13 07:16:58,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-13 07:16:58,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-13 07:16:58,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 393 transitions. [2024-10-13 07:16:58,308 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5848214285714286 [2024-10-13 07:16:58,308 INFO L175 Difference]: Start difference. First operand has 75 places, 61 transitions, 484 flow. Second operand 24 states and 393 transitions. [2024-10-13 07:16:58,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 297 transitions, 1817 flow [2024-10-13 07:16:58,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 297 transitions, 1696 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-10-13 07:16:58,339 INFO L231 Difference]: Finished difference. Result has 92 places, 83 transitions, 851 flow [2024-10-13 07:16:58,340 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=851, PETRI_PLACES=92, PETRI_TRANSITIONS=83} [2024-10-13 07:16:58,340 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 65 predicate places. [2024-10-13 07:16:58,340 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 83 transitions, 851 flow [2024-10-13 07:16:58,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.76) internal successors, (219), 25 states have internal predecessors, (219), 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) [2024-10-13 07:16:58,342 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:58,343 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:16:58,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-13 07:16:58,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:58,547 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:16:58,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:58,548 INFO L85 PathProgramCache]: Analyzing trace with hash -384876044, now seen corresponding path program 8 times [2024-10-13 07:16:58,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:58,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257808963] [2024-10-13 07:16:58,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:58,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 07:16:58,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:58,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257808963] [2024-10-13 07:16:58,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257808963] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:16:58,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214411818] [2024-10-13 07:16:58,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:16:58,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:58,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:16:58,844 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:16:58,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 07:16:58,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:16:58,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:16:58,939 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 07:16:58,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:16:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 07:16:59,175 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:16:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 07:16:59,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214411818] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:16:59,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:16:59,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-10-13 07:16:59,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449924287] [2024-10-13 07:16:59,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:16:59,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-13 07:16:59,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:59,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-13 07:16:59,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2024-10-13 07:16:59,474 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:16:59,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 83 transitions, 851 flow. Second operand has 26 states, 26 states have (on average 8.307692307692308) internal successors, (216), 26 states have internal predecessors, (216), 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) [2024-10-13 07:16:59,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:59,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:16:59,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:17:00,866 INFO L124 PetriNetUnfolderBase]: 8178/14209 cut-off events. [2024-10-13 07:17:00,866 INFO L125 PetriNetUnfolderBase]: For 19326/19326 co-relation queries the response was YES. [2024-10-13 07:17:00,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36539 conditions, 14209 events. 8178/14209 cut-off events. For 19326/19326 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 100798 event pairs, 5133 based on Foata normal form. 242/12206 useless extension candidates. Maximal degree in co-relation 36510. Up to 7092 conditions per place. [2024-10-13 07:17:00,968 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 76 selfloop transitions, 5 changer transitions 99/183 dead transitions. [2024-10-13 07:17:00,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 183 transitions, 1906 flow [2024-10-13 07:17:00,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 07:17:00,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-13 07:17:00,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-10-13 07:17:00,970 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-10-13 07:17:00,970 INFO L175 Difference]: Start difference. First operand has 92 places, 83 transitions, 851 flow. Second operand 10 states and 130 transitions. [2024-10-13 07:17:00,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 183 transitions, 1906 flow [2024-10-13 07:17:01,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 183 transitions, 1642 flow, removed 33 selfloop flow, removed 11 redundant places. [2024-10-13 07:17:01,083 INFO L231 Difference]: Finished difference. Result has 95 places, 84 transitions, 818 flow [2024-10-13 07:17:01,084 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=818, PETRI_PLACES=95, PETRI_TRANSITIONS=84} [2024-10-13 07:17:01,084 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 68 predicate places. [2024-10-13 07:17:01,084 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 84 transitions, 818 flow [2024-10-13 07:17:01,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.307692307692308) internal successors, (216), 26 states have internal predecessors, (216), 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) [2024-10-13 07:17:01,085 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:17:01,085 INFO L204 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] [2024-10-13 07:17:01,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-13 07:17:01,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-13 07:17:01,286 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:17:01,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:17:01,287 INFO L85 PathProgramCache]: Analyzing trace with hash -774948251, now seen corresponding path program 9 times [2024-10-13 07:17:01,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:17:01,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907484958] [2024-10-13 07:17:01,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:17:01,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:17:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:17:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-13 07:17:01,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:17:01,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907484958] [2024-10-13 07:17:01,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907484958] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:17:01,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260102372] [2024-10-13 07:17:01,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:17:01,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:17:01,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:17:01,448 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:17:01,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 07:17:01,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-13 07:17:01,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:17:01,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 07:17:01,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:17:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-13 07:17:01,621 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:17:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-13 07:17:01,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260102372] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:17:01,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:17:01,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2024-10-13 07:17:01,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526713287] [2024-10-13 07:17:01,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:17:01,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 07:17:01,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:17:01,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 07:17:01,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-13 07:17:01,694 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:17:01,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 84 transitions, 818 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 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) [2024-10-13 07:17:01,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:17:01,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:17:01,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:17:03,176 INFO L124 PetriNetUnfolderBase]: 7724/13225 cut-off events. [2024-10-13 07:17:03,176 INFO L125 PetriNetUnfolderBase]: For 16461/16461 co-relation queries the response was YES. [2024-10-13 07:17:03,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34236 conditions, 13225 events. 7724/13225 cut-off events. For 16461/16461 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 87515 event pairs, 1656 based on Foata normal form. 22/11197 useless extension candidates. Maximal degree in co-relation 34202. Up to 3528 conditions per place. [2024-10-13 07:17:03,239 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 102 selfloop transitions, 82 changer transitions 0/187 dead transitions. [2024-10-13 07:17:03,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 187 transitions, 2001 flow [2024-10-13 07:17:03,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:17:03,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:17:03,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-10-13 07:17:03,241 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-10-13 07:17:03,241 INFO L175 Difference]: Start difference. First operand has 95 places, 84 transitions, 818 flow. Second operand 6 states and 114 transitions. [2024-10-13 07:17:03,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 187 transitions, 2001 flow [2024-10-13 07:17:03,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 187 transitions, 1815 flow, removed 89 selfloop flow, removed 8 redundant places. [2024-10-13 07:17:03,365 INFO L231 Difference]: Finished difference. Result has 89 places, 131 transitions, 1438 flow [2024-10-13 07:17:03,366 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1438, PETRI_PLACES=89, PETRI_TRANSITIONS=131} [2024-10-13 07:17:03,367 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 62 predicate places. [2024-10-13 07:17:03,367 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 131 transitions, 1438 flow [2024-10-13 07:17:03,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 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) [2024-10-13 07:17:03,368 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:17:03,368 INFO L204 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] [2024-10-13 07:17:03,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-13 07:17:03,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-13 07:17:03,573 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:17:03,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:17:03,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1980071336, now seen corresponding path program 10 times [2024-10-13 07:17:03,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:17:03,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107699795] [2024-10-13 07:17:03,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:17:03,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:17:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:17:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:17:04,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:17:04,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107699795] [2024-10-13 07:17:04,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107699795] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:17:04,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079734627] [2024-10-13 07:17:04,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:17:04,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:17:04,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:17:04,432 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:17:04,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 07:17:04,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:17:04,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:17:04,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-13 07:17:04,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:17:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:17:04,921 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:17:04,959 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 07:17:04,959 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 [2024-10-13 07:17:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 47 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-13 07:17:05,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079734627] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:17:05,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:17:05,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 35 [2024-10-13 07:17:05,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243780269] [2024-10-13 07:17:05,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:17:05,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-13 07:17:05,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:17:05,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-13 07:17:05,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2024-10-13 07:17:05,178 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:17:05,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 131 transitions, 1438 flow. Second operand has 36 states, 36 states have (on average 8.0) internal successors, (288), 36 states have internal predecessors, (288), 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) [2024-10-13 07:17:05,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:17:05,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:17:05,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:17:08,975 INFO L124 PetriNetUnfolderBase]: 13018/22293 cut-off events. [2024-10-13 07:17:08,975 INFO L125 PetriNetUnfolderBase]: For 33013/33013 co-relation queries the response was YES. [2024-10-13 07:17:09,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59730 conditions, 22293 events. 13018/22293 cut-off events. For 33013/33013 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 157567 event pairs, 893 based on Foata normal form. 16/18852 useless extension candidates. Maximal degree in co-relation 59699. Up to 4100 conditions per place. [2024-10-13 07:17:09,098 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 405 selfloop transitions, 196 changer transitions 117/721 dead transitions. [2024-10-13 07:17:09,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 721 transitions, 5512 flow [2024-10-13 07:17:09,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-10-13 07:17:09,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-10-13 07:17:09,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 848 transitions. [2024-10-13 07:17:09,102 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6180758017492711 [2024-10-13 07:17:09,102 INFO L175 Difference]: Start difference. First operand has 89 places, 131 transitions, 1438 flow. Second operand 49 states and 848 transitions. [2024-10-13 07:17:09,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 721 transitions, 5512 flow [2024-10-13 07:17:09,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 721 transitions, 5372 flow, removed 70 selfloop flow, removed 0 redundant places. [2024-10-13 07:17:09,229 INFO L231 Difference]: Finished difference. Result has 154 places, 230 transitions, 2952 flow [2024-10-13 07:17:09,229 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=2952, PETRI_PLACES=154, PETRI_TRANSITIONS=230} [2024-10-13 07:17:09,230 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 127 predicate places. [2024-10-13 07:17:09,230 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 230 transitions, 2952 flow [2024-10-13 07:17:09,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 8.0) internal successors, (288), 36 states have internal predecessors, (288), 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) [2024-10-13 07:17:09,230 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:17:09,231 INFO L204 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] [2024-10-13 07:17:09,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-13 07:17:09,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-13 07:17:09,432 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:17:09,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:17:09,432 INFO L85 PathProgramCache]: Analyzing trace with hash 2127821118, now seen corresponding path program 11 times [2024-10-13 07:17:09,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:17:09,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937606171] [2024-10-13 07:17:09,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:17:09,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:17:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:17:10,246 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:17:10,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:17:10,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937606171] [2024-10-13 07:17:10,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937606171] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:17:10,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433232845] [2024-10-13 07:17:10,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:17:10,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:17:10,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:17:10,251 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:17:10,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 07:17:10,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-13 07:17:10,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:17:10,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-13 07:17:10,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:17:10,495 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 [2024-10-13 07:17:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:17:10,865 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:17:11,350 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 43 treesize of output 39 [2024-10-13 07:17:11,400 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 07:17:11,401 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 61 treesize of output 47 [2024-10-13 07:17:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:17:11,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433232845] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:17:11,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:17:11,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 12] total 38 [2024-10-13 07:17:11,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601649645] [2024-10-13 07:17:11,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:17:11,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-13 07:17:11,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:17:11,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-13 07:17:11,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2024-10-13 07:17:11,468 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:17:11,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 230 transitions, 2952 flow. Second operand has 39 states, 39 states have (on average 8.0) internal successors, (312), 39 states have internal predecessors, (312), 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) [2024-10-13 07:17:11,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:17:11,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:17:11,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:17:16,309 INFO L124 PetriNetUnfolderBase]: 14927/25548 cut-off events. [2024-10-13 07:17:16,309 INFO L125 PetriNetUnfolderBase]: For 54721/54721 co-relation queries the response was YES. [2024-10-13 07:17:16,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71207 conditions, 25548 events. 14927/25548 cut-off events. For 54721/54721 co-relation queries the response was YES. Maximal size of possible extension queue 743. Compared 191721 event pairs, 5624 based on Foata normal form. 1/21588 useless extension candidates. Maximal degree in co-relation 71158. Up to 17851 conditions per place. [2024-10-13 07:17:16,544 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 428 selfloop transitions, 73 changer transitions 123/627 dead transitions. [2024-10-13 07:17:16,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 627 transitions, 5609 flow [2024-10-13 07:17:16,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-13 07:17:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-10-13 07:17:16,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 607 transitions. [2024-10-13 07:17:16,547 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5859073359073359 [2024-10-13 07:17:16,547 INFO L175 Difference]: Start difference. First operand has 154 places, 230 transitions, 2952 flow. Second operand 37 states and 607 transitions. [2024-10-13 07:17:16,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 627 transitions, 5609 flow [2024-10-13 07:17:16,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 627 transitions, 5028 flow, removed 95 selfloop flow, removed 12 redundant places. [2024-10-13 07:17:16,914 INFO L231 Difference]: Finished difference. Result has 184 places, 257 transitions, 2969 flow [2024-10-13 07:17:16,914 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2433, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2969, PETRI_PLACES=184, PETRI_TRANSITIONS=257} [2024-10-13 07:17:16,915 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 157 predicate places. [2024-10-13 07:17:16,915 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 257 transitions, 2969 flow [2024-10-13 07:17:16,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 8.0) internal successors, (312), 39 states have internal predecessors, (312), 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) [2024-10-13 07:17:16,915 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:17:16,915 INFO L204 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] [2024-10-13 07:17:16,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-13 07:17:17,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-13 07:17:17,117 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:17:17,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:17:17,117 INFO L85 PathProgramCache]: Analyzing trace with hash 665143316, now seen corresponding path program 12 times [2024-10-13 07:17:17,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:17:17,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174703310] [2024-10-13 07:17:17,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:17:17,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:17:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:17:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:17:18,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:17:18,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174703310] [2024-10-13 07:17:18,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174703310] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:17:18,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661403387] [2024-10-13 07:17:18,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:17:18,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:17:18,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:17:18,019 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:17:18,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-13 07:17:18,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-10-13 07:17:18,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:17:18,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-13 07:17:18,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:17:18,239 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 19 treesize of output 1 [2024-10-13 07:17:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 07:17:18,588 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:17:19,251 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 43 treesize of output 39 [2024-10-13 07:17:19,259 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 07:17:19,260 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 61 treesize of output 47 [2024-10-13 07:17:19,401 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 07:17:19,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661403387] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:17:19,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:17:19,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 35 [2024-10-13 07:17:19,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584669704] [2024-10-13 07:17:19,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:17:19,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-13 07:17:19,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:17:19,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-13 07:17:19,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2024-10-13 07:17:19,404 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:17:19,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 257 transitions, 2969 flow. Second operand has 36 states, 36 states have (on average 7.861111111111111) internal successors, (283), 36 states have internal predecessors, (283), 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) [2024-10-13 07:17:19,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:17:19,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:17:19,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:17:43,979 INFO L124 PetriNetUnfolderBase]: 84812/144912 cut-off events. [2024-10-13 07:17:43,979 INFO L125 PetriNetUnfolderBase]: For 257751/257751 co-relation queries the response was YES. [2024-10-13 07:17:45,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385163 conditions, 144912 events. 84812/144912 cut-off events. For 257751/257751 co-relation queries the response was YES. Maximal size of possible extension queue 2778. Compared 1330770 event pairs, 26031 based on Foata normal form. 88/122507 useless extension candidates. Maximal degree in co-relation 385107. Up to 26750 conditions per place. [2024-10-13 07:17:45,424 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 1110 selfloop transitions, 831 changer transitions 237/2181 dead transitions. [2024-10-13 07:17:45,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 2181 transitions, 22544 flow [2024-10-13 07:17:45,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-10-13 07:17:45,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2024-10-13 07:17:45,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 1224 transitions. [2024-10-13 07:17:45,428 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6156941649899397 [2024-10-13 07:17:45,428 INFO L175 Difference]: Start difference. First operand has 184 places, 257 transitions, 2969 flow. Second operand 71 states and 1224 transitions. [2024-10-13 07:17:45,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 2181 transitions, 22544 flow [2024-10-13 07:17:49,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 2181 transitions, 22304 flow, removed 53 selfloop flow, removed 17 redundant places. [2024-10-13 07:17:49,973 INFO L231 Difference]: Finished difference. Result has 264 places, 1120 transitions, 16836 flow [2024-10-13 07:17:49,974 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2887, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=16836, PETRI_PLACES=264, PETRI_TRANSITIONS=1120} [2024-10-13 07:17:49,974 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 237 predicate places. [2024-10-13 07:17:49,974 INFO L471 AbstractCegarLoop]: Abstraction has has 264 places, 1120 transitions, 16836 flow [2024-10-13 07:17:49,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 7.861111111111111) internal successors, (283), 36 states have internal predecessors, (283), 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) [2024-10-13 07:17:49,975 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:17:49,975 INFO L204 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] [2024-10-13 07:17:49,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-13 07:17:50,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-13 07:17:50,176 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:17:50,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:17:50,176 INFO L85 PathProgramCache]: Analyzing trace with hash 343215040, now seen corresponding path program 13 times [2024-10-13 07:17:50,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:17:50,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117697903] [2024-10-13 07:17:50,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:17:50,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:17:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:17:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-13 07:17:50,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:17:50,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117697903] [2024-10-13 07:17:50,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117697903] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:17:50,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721884439] [2024-10-13 07:17:50,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:17:50,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:17:50,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:17:50,472 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:17:50,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-13 07:17:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:17:50,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:17:50,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:17:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-13 07:17:50,688 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:17:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-13 07:17:50,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721884439] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:17:50,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:17:50,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 16 [2024-10-13 07:17:50,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213809756] [2024-10-13 07:17:50,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:17:50,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-13 07:17:50,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:17:50,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-13 07:17:50,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-10-13 07:17:50,793 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:17:50,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 1120 transitions, 16836 flow. Second operand has 17 states, 17 states have (on average 9.235294117647058) internal successors, (157), 17 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) [2024-10-13 07:17:50,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:17:50,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:17:50,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand