./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/unroll-cond-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 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/unroll-cond-3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 14:45:10,904 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 14:45:11,002 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 14:45:11,006 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 14:45:11,006 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 14:45:11,039 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 14:45:11,039 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 14:45:11,040 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 14:45:11,040 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 14:45:11,042 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 14:45:11,042 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 14:45:11,042 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 14:45:11,043 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 14:45:11,045 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 14:45:11,045 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 14:45:11,045 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 14:45:11,046 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 14:45:11,046 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 14:45:11,046 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 14:45:11,046 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 14:45:11,047 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 14:45:11,047 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 14:45:11,051 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 14:45:11,051 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 14:45:11,051 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 14:45:11,052 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 14:45:11,052 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 14:45:11,052 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 14:45:11,052 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 14:45:11,053 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 14:45:11,053 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 14:45:11,053 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 14:45:11,053 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:45:11,054 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 14:45:11,054 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 14:45:11,054 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 14:45:11,054 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 14:45:11,054 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 14:45:11,055 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 14:45:11,055 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 14:45:11,055 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 14:45:11,056 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 14:45:11,056 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 [2024-10-14 14:45:11,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 14:45:11,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 14:45:11,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 14:45:11,349 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 14:45:11,349 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 14:45:11,350 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2024-10-14 14:45:12,798 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 14:45:12,994 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 14:45:12,995 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2024-10-14 14:45:13,006 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26d716b41/19656ba3b96d4ec2a18aeb620f70befe/FLAGa85cba86c [2024-10-14 14:45:13,021 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26d716b41/19656ba3b96d4ec2a18aeb620f70befe [2024-10-14 14:45:13,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 14:45:13,026 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 14:45:13,027 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 14:45:13,028 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 14:45:13,034 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 14:45:13,034 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:45:13" (1/1) ... [2024-10-14 14:45:13,037 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e60e3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:45:13, skipping insertion in model container [2024-10-14 14:45:13,037 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:45:13" (1/1) ... [2024-10-14 14:45:13,061 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 14:45:13,262 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/unroll-cond-3.wvr.c[2667,2680] [2024-10-14 14:45:13,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:45:13,282 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 14:45:13,312 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/unroll-cond-3.wvr.c[2667,2680] [2024-10-14 14:45:13,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:45:13,337 INFO L204 MainTranslator]: Completed translation [2024-10-14 14:45:13,338 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:45:13 WrapperNode [2024-10-14 14:45:13,338 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 14:45:13,339 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 14:45:13,339 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 14:45:13,339 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 14:45:13,346 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:45:13" (1/1) ... [2024-10-14 14:45:13,357 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:45:13" (1/1) ... [2024-10-14 14:45:13,389 INFO L138 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 155 [2024-10-14 14:45:13,389 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 14:45:13,392 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 14:45:13,392 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 14:45:13,393 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 14:45:13,403 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:45:13" (1/1) ... [2024-10-14 14:45:13,403 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:45:13" (1/1) ... [2024-10-14 14:45:13,406 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:45:13" (1/1) ... [2024-10-14 14:45:13,421 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-14 14:45:13,422 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:45:13" (1/1) ... [2024-10-14 14:45:13,422 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:45:13" (1/1) ... [2024-10-14 14:45:13,432 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:45:13" (1/1) ... [2024-10-14 14:45:13,435 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:45:13" (1/1) ... [2024-10-14 14:45:13,441 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:45:13" (1/1) ... [2024-10-14 14:45:13,442 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:45:13" (1/1) ... [2024-10-14 14:45:13,447 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 14:45:13,448 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 14:45:13,448 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 14:45:13,449 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 14:45:13,452 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:45:13" (1/1) ... [2024-10-14 14:45:13,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:45:13,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:45:13,489 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) [2024-10-14 14:45:13,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 14:45:13,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 14:45:13,533 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 14:45:13,533 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 14:45:13,533 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 14:45:13,534 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 14:45:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 14:45:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 14:45:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 14:45:13,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 14:45:13,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 14:45:13,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 14:45:13,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 14:45:13,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 14:45:13,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 14:45:13,538 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 14:45:13,647 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 14:45:13,649 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 14:45:13,945 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 14:45:13,945 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 14:45:14,197 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 14:45:14,198 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-14 14:45:14,198 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:45:14 BoogieIcfgContainer [2024-10-14 14:45:14,198 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 14:45:14,203 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 14:45:14,203 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 14:45:14,206 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 14:45:14,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:45:13" (1/3) ... [2024-10-14 14:45:14,207 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@681770fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:45:14, skipping insertion in model container [2024-10-14 14:45:14,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:45:13" (2/3) ... [2024-10-14 14:45:14,207 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@681770fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:45:14, skipping insertion in model container [2024-10-14 14:45:14,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:45:14" (3/3) ... [2024-10-14 14:45:14,209 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2024-10-14 14:45:14,231 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 14:45:14,232 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 14:45:14,232 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 14:45:14,284 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 14:45:14,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-10-14 14:45:14,354 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-10-14 14:45:14,354 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:45:14,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-10-14 14:45:14,359 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-10-14 14:45:14,363 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-10-14 14:45:14,377 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:45:14,388 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;@414a2f51, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:45:14,389 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-14 14:45:14,401 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:45:14,401 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-10-14 14:45:14,401 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:45:14,401 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:45:14,402 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:45:14,403 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:45:14,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:45:14,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1958557296, now seen corresponding path program 1 times [2024-10-14 14:45:14,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:45:14,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592744890] [2024-10-14 14:45:14,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:45:14,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:45:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:45:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:45:14,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:45:14,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592744890] [2024-10-14 14:45:14,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592744890] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:45:14,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:45:14,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:45:14,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195368225] [2024-10-14 14:45:14,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:45:14,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:45:14,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:45:14,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:45:14,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:45:14,875 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-14 14:45:14,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2024-10-14 14:45:14,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:45:14,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-14 14:45:14,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:45:14,958 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2024-10-14 14:45:14,958 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-14 14:45:14,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 71 events. 38/71 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 121 event pairs, 22 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 120. Up to 70 conditions per place. [2024-10-14 14:45:14,961 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 15 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2024-10-14 14:45:14,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 82 flow [2024-10-14 14:45:14,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:45:14,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:45:14,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2024-10-14 14:45:14,974 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-10-14 14:45:14,976 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 27 transitions. [2024-10-14 14:45:14,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 82 flow [2024-10-14 14:45:14,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 14:45:14,981 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2024-10-14 14:45:14,983 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2024-10-14 14:45:14,988 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-10-14 14:45:14,988 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2024-10-14 14:45:14,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2024-10-14 14:45:14,989 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:45:14,989 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:45:14,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 14:45:14,990 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:45:14,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:45:14,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1419692673, now seen corresponding path program 1 times [2024-10-14 14:45:14,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:45:14,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231170805] [2024-10-14 14:45:14,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:45:14,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:45:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:45:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:45:15,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:45:15,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231170805] [2024-10-14 14:45:15,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231170805] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:45:15,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:45:15,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 14:45:15,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780844036] [2024-10-14 14:45:15,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:45:15,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 14:45:15,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:45:15,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 14:45:15,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 14:45:15,384 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-14 14:45:15,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2024-10-14 14:45:15,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:45:15,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-14 14:45:15,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:45:15,564 INFO L124 PetriNetUnfolderBase]: 65/123 cut-off events. [2024-10-14 14:45:15,564 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:45:15,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 123 events. 65/123 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 323 event pairs, 22 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 248. Up to 71 conditions per place. [2024-10-14 14:45:15,566 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 32 selfloop transitions, 5 changer transitions 0/38 dead transitions. [2024-10-14 14:45:15,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 38 transitions, 169 flow [2024-10-14 14:45:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:45:15,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:45:15,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2024-10-14 14:45:15,568 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-10-14 14:45:15,568 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 52 transitions. [2024-10-14 14:45:15,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 38 transitions, 169 flow [2024-10-14 14:45:15,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 38 transitions, 165 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 14:45:15,570 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2024-10-14 14:45:15,570 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2024-10-14 14:45:15,571 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2024-10-14 14:45:15,571 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2024-10-14 14:45:15,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2024-10-14 14:45:15,572 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:45:15,572 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:45:15,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 14:45:15,572 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:45:15,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:45:15,573 INFO L85 PathProgramCache]: Analyzing trace with hash 838542481, now seen corresponding path program 2 times [2024-10-14 14:45:15,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:45:15,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134811353] [2024-10-14 14:45:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:45:15,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:45:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:45:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:45:15,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:45:15,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134811353] [2024-10-14 14:45:15,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134811353] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:45:15,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:45:15,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 14:45:15,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986246269] [2024-10-14 14:45:15,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:45:15,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 14:45:15,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:45:15,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 14:45:15,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-14 14:45:15,955 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-14 14:45:15,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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) [2024-10-14 14:45:15,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:45:15,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-14 14:45:15,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:45:16,177 INFO L124 PetriNetUnfolderBase]: 98/190 cut-off events. [2024-10-14 14:45:16,178 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2024-10-14 14:45:16,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 190 events. 98/190 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 602 event pairs, 3 based on Foata normal form. 1/154 useless extension candidates. Maximal degree in co-relation 527. Up to 75 conditions per place. [2024-10-14 14:45:16,182 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 38 selfloop transitions, 19 changer transitions 2/60 dead transitions. [2024-10-14 14:45:16,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 60 transitions, 335 flow [2024-10-14 14:45:16,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 14:45:16,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-14 14:45:16,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 79 transitions. [2024-10-14 14:45:16,185 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49375 [2024-10-14 14:45:16,185 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 8 states and 79 transitions. [2024-10-14 14:45:16,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 60 transitions, 335 flow [2024-10-14 14:45:16,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 60 transitions, 317 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-10-14 14:45:16,189 INFO L231 Difference]: Finished difference. Result has 35 places, 37 transitions, 197 flow [2024-10-14 14:45:16,192 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=197, PETRI_PLACES=35, PETRI_TRANSITIONS=37} [2024-10-14 14:45:16,192 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2024-10-14 14:45:16,192 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 37 transitions, 197 flow [2024-10-14 14:45:16,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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) [2024-10-14 14:45:16,193 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:45:16,193 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:45:16,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 14:45:16,193 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:45:16,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:45:16,194 INFO L85 PathProgramCache]: Analyzing trace with hash -835769155, now seen corresponding path program 3 times [2024-10-14 14:45:16,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:45:16,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274420920] [2024-10-14 14:45:16,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:45:16,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:45:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:45:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:45:16,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:45:16,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274420920] [2024-10-14 14:45:16,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274420920] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:45:16,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:45:16,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 14:45:16,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934226356] [2024-10-14 14:45:16,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:45:16,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 14:45:16,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:45:16,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 14:45:16,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-14 14:45:16,469 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-14 14:45:16,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 37 transitions, 197 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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) [2024-10-14 14:45:16,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:45:16,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-14 14:45:16,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:45:16,610 INFO L124 PetriNetUnfolderBase]: 106/199 cut-off events. [2024-10-14 14:45:16,610 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2024-10-14 14:45:16,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 199 events. 106/199 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 616 event pairs, 10 based on Foata normal form. 3/184 useless extension candidates. Maximal degree in co-relation 668. Up to 151 conditions per place. [2024-10-14 14:45:16,613 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 36 selfloop transitions, 17 changer transitions 0/54 dead transitions. [2024-10-14 14:45:16,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 54 transitions, 371 flow [2024-10-14 14:45:16,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 14:45:16,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 14:45:16,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2024-10-14 14:45:16,624 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-14 14:45:16,624 INFO L175 Difference]: Start difference. First operand has 35 places, 37 transitions, 197 flow. Second operand 6 states and 60 transitions. [2024-10-14 14:45:16,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 54 transitions, 371 flow [2024-10-14 14:45:16,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 54 transitions, 341 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-10-14 14:45:16,631 INFO L231 Difference]: Finished difference. Result has 40 places, 42 transitions, 243 flow [2024-10-14 14:45:16,632 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=40, PETRI_TRANSITIONS=42} [2024-10-14 14:45:16,633 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2024-10-14 14:45:16,633 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 42 transitions, 243 flow [2024-10-14 14:45:16,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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) [2024-10-14 14:45:16,634 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:45:16,634 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:45:16,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 14:45:16,635 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:45:16,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:45:16,635 INFO L85 PathProgramCache]: Analyzing trace with hash 760488887, now seen corresponding path program 4 times [2024-10-14 14:45:16,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:45:16,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227325415] [2024-10-14 14:45:16,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:45:16,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:45:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:45:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:45:16,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:45:16,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227325415] [2024-10-14 14:45:16,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227325415] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:45:16,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:45:16,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 14:45:16,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506077135] [2024-10-14 14:45:16,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:45:16,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 14:45:16,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:45:16,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 14:45:16,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-14 14:45:16,841 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-14 14:45:16,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 42 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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) [2024-10-14 14:45:16,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:45:16,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-14 14:45:16,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:45:16,972 INFO L124 PetriNetUnfolderBase]: 104/191 cut-off events. [2024-10-14 14:45:16,972 INFO L125 PetriNetUnfolderBase]: For 267/267 co-relation queries the response was YES. [2024-10-14 14:45:16,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 191 events. 104/191 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 557 event pairs, 15 based on Foata normal form. 3/176 useless extension candidates. Maximal degree in co-relation 640. Up to 144 conditions per place. [2024-10-14 14:45:16,977 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 35 selfloop transitions, 18 changer transitions 0/54 dead transitions. [2024-10-14 14:45:16,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 54 transitions, 398 flow [2024-10-14 14:45:16,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 14:45:16,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 14:45:16,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 58 transitions. [2024-10-14 14:45:16,978 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-10-14 14:45:16,979 INFO L175 Difference]: Start difference. First operand has 40 places, 42 transitions, 243 flow. Second operand 6 states and 58 transitions. [2024-10-14 14:45:16,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 54 transitions, 398 flow [2024-10-14 14:45:16,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 54 transitions, 370 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-10-14 14:45:16,984 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 275 flow [2024-10-14 14:45:16,984 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=275, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2024-10-14 14:45:16,987 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2024-10-14 14:45:16,987 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 275 flow [2024-10-14 14:45:16,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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) [2024-10-14 14:45:16,988 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:45:16,988 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:45:16,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 14:45:16,988 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:45:16,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:45:16,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1456327302, now seen corresponding path program 1 times [2024-10-14 14:45:16,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:45:16,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694383925] [2024-10-14 14:45:16,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:45:16,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:45:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:45:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:45:17,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:45:17,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694383925] [2024-10-14 14:45:17,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694383925] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:45:17,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866498284] [2024-10-14 14:45:17,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:45:17,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:45:17,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:45:17,217 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) [2024-10-14 14:45:17,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 14:45:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:45:17,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-14 14:45:17,322 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:45:17,401 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 [2024-10-14 14:45:17,714 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 15 treesize of output 7 [2024-10-14 14:45:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:45:17,730 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:45:18,574 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 33 treesize of output 29 [2024-10-14 14:45:18,589 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:45:18,590 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 62 treesize of output 41 [2024-10-14 14:45:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:45:18,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866498284] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:45:18,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:45:18,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-10-14 14:45:18,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111089317] [2024-10-14 14:45:18,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:45:18,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 14:45:18,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:45:18,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 14:45:18,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:45:18,625 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-14 14:45:18,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 275 flow. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 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) [2024-10-14 14:45:18,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:45:18,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-14 14:45:18,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:45:21,474 INFO L124 PetriNetUnfolderBase]: 199/384 cut-off events. [2024-10-14 14:45:21,474 INFO L125 PetriNetUnfolderBase]: For 333/333 co-relation queries the response was YES. [2024-10-14 14:45:21,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1225 conditions, 384 events. 199/384 cut-off events. For 333/333 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1532 event pairs, 3 based on Foata normal form. 1/342 useless extension candidates. Maximal degree in co-relation 1200. Up to 119 conditions per place. [2024-10-14 14:45:21,479 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 84 selfloop transitions, 44 changer transitions 3/132 dead transitions. [2024-10-14 14:45:21,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 132 transitions, 857 flow [2024-10-14 14:45:21,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-14 14:45:21,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-14 14:45:21,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 169 transitions. [2024-10-14 14:45:21,482 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44473684210526315 [2024-10-14 14:45:21,482 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 275 flow. Second operand 19 states and 169 transitions. [2024-10-14 14:45:21,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 132 transitions, 857 flow [2024-10-14 14:45:21,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 132 transitions, 803 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-10-14 14:45:21,491 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 508 flow [2024-10-14 14:45:21,491 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=508, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2024-10-14 14:45:21,492 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 45 predicate places. [2024-10-14 14:45:21,492 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 508 flow [2024-10-14 14:45:21,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 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) [2024-10-14 14:45:21,492 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:45:21,492 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:45:21,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 14:45:21,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-14 14:45:21,698 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:45:21,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:45:21,699 INFO L85 PathProgramCache]: Analyzing trace with hash -995429169, now seen corresponding path program 1 times [2024-10-14 14:45:21,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:45:21,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067856161] [2024-10-14 14:45:21,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:45:21,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:45:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:45:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:45:21,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:45:21,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067856161] [2024-10-14 14:45:21,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067856161] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:45:21,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717866939] [2024-10-14 14:45:21,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:45:21,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:45:21,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:45:21,869 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) [2024-10-14 14:45:21,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 14:45:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:45:21,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-14 14:45:21,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:45:21,988 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 [2024-10-14 14:45:22,315 INFO L349 Elim1Store]: treesize reduction 39, result has 20.4 percent of original size [2024-10-14 14:45:22,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 86 [2024-10-14 14:45:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:45:22,357 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:45:23,596 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 318 treesize of output 280 [2024-10-14 14:45:23,810 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:45:23,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 1130 treesize of output 862 [2024-10-14 14:46:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:46:04,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717866939] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:46:04,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:46:04,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 21 [2024-10-14 14:46:04,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509685331] [2024-10-14 14:46:04,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:46:04,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 14:46:04,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:46:04,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 14:46:04,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:46:04,864 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-14 14:46:04,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 508 flow. Second operand has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 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) [2024-10-14 14:46:04,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:46:04,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-14 14:46:04,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:46:06,069 INFO L124 PetriNetUnfolderBase]: 398/738 cut-off events. [2024-10-14 14:46:06,070 INFO L125 PetriNetUnfolderBase]: For 1636/1636 co-relation queries the response was YES. [2024-10-14 14:46:06,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3047 conditions, 738 events. 398/738 cut-off events. For 1636/1636 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3464 event pairs, 19 based on Foata normal form. 4/695 useless extension candidates. Maximal degree in co-relation 2835. Up to 231 conditions per place. [2024-10-14 14:46:06,080 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 106 selfloop transitions, 75 changer transitions 31/213 dead transitions. [2024-10-14 14:46:06,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 213 transitions, 1713 flow [2024-10-14 14:46:06,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-14 14:46:06,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-14 14:46:06,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 231 transitions. [2024-10-14 14:46:06,083 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-10-14 14:46:06,083 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 508 flow. Second operand 28 states and 231 transitions. [2024-10-14 14:46:06,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 213 transitions, 1713 flow [2024-10-14 14:46:06,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 213 transitions, 1601 flow, removed 43 selfloop flow, removed 2 redundant places. [2024-10-14 14:46:06,096 INFO L231 Difference]: Finished difference. Result has 99 places, 115 transitions, 1006 flow [2024-10-14 14:46:06,097 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1006, PETRI_PLACES=99, PETRI_TRANSITIONS=115} [2024-10-14 14:46:06,098 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 78 predicate places. [2024-10-14 14:46:06,098 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 115 transitions, 1006 flow [2024-10-14 14:46:06,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 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) [2024-10-14 14:46:06,099 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:46:06,099 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:46:06,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 14:46:06,303 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,SelfDestructingSolverStorable6 [2024-10-14 14:46:06,304 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:46:06,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:46:06,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1333235710, now seen corresponding path program 2 times [2024-10-14 14:46:06,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:46:06,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132568581] [2024-10-14 14:46:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:46:06,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:46:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:46:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:46:06,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:46:06,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132568581] [2024-10-14 14:46:06,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132568581] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:46:06,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364246024] [2024-10-14 14:46:06,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:46:06,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:46:06,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:46:06,581 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) [2024-10-14 14:46:06,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 14:46:06,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:46:06,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:46:06,684 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-14 14:46:06,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:46:06,721 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 [2024-10-14 14:46:06,927 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:46:06,927 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 115 treesize of output 104 [2024-10-14 14:46:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:46:06,990 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:46:07,739 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 33 treesize of output 29 [2024-10-14 14:46:07,747 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:46:07,748 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 62 treesize of output 41 [2024-10-14 14:46:07,760 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 87 treesize of output 77 [2024-10-14 14:46:07,802 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2024-10-14 14:46:07,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 164 [2024-10-14 14:46:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:46:08,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364246024] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:46:08,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:46:08,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-10-14 14:46:08,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459549444] [2024-10-14 14:46:08,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:46:08,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 14:46:08,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:46:08,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 14:46:08,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-10-14 14:46:08,042 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-14 14:46:08,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 115 transitions, 1006 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:46:08,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:46:08,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-14 14:46:08,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:46:10,889 INFO L124 PetriNetUnfolderBase]: 487/944 cut-off events. [2024-10-14 14:46:10,889 INFO L125 PetriNetUnfolderBase]: For 3583/3583 co-relation queries the response was YES. [2024-10-14 14:46:10,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4351 conditions, 944 events. 487/944 cut-off events. For 3583/3583 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4938 event pairs, 19 based on Foata normal form. 14/958 useless extension candidates. Maximal degree in co-relation 4196. Up to 275 conditions per place. [2024-10-14 14:46:10,902 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 113 selfloop transitions, 76 changer transitions 78/268 dead transitions. [2024-10-14 14:46:10,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 268 transitions, 2468 flow [2024-10-14 14:46:10,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-14 14:46:10,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-10-14 14:46:10,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 271 transitions. [2024-10-14 14:46:10,905 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4672413793103448 [2024-10-14 14:46:10,906 INFO L175 Difference]: Start difference. First operand has 99 places, 115 transitions, 1006 flow. Second operand 29 states and 271 transitions. [2024-10-14 14:46:10,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 268 transitions, 2468 flow [2024-10-14 14:46:10,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 268 transitions, 2307 flow, removed 51 selfloop flow, removed 9 redundant places. [2024-10-14 14:46:10,934 INFO L231 Difference]: Finished difference. Result has 123 places, 114 transitions, 1090 flow [2024-10-14 14:46:10,935 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1090, PETRI_PLACES=123, PETRI_TRANSITIONS=114} [2024-10-14 14:46:10,936 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 102 predicate places. [2024-10-14 14:46:10,936 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 114 transitions, 1090 flow [2024-10-14 14:46:10,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:46:10,937 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:46:10,937 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:46:10,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 14:46:11,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:46:11,139 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:46:11,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:46:11,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1251118278, now seen corresponding path program 3 times [2024-10-14 14:46:11,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:46:11,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341706954] [2024-10-14 14:46:11,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:46:11,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:46:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:46:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:46:11,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:46:11,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341706954] [2024-10-14 14:46:11,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341706954] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:46:11,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095437575] [2024-10-14 14:46:11,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:46:11,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:46:11,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:46:11,294 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) [2024-10-14 14:46:11,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 14:46:11,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-14 14:46:11,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:46:11,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-14 14:46:11,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:46:11,404 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 [2024-10-14 14:46:11,590 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:46:11,591 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 115 treesize of output 104 [2024-10-14 14:46:11,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:46:11,650 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:46:12,626 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 87 treesize of output 77 [2024-10-14 14:46:12,658 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:46:12,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 188 [2024-10-14 14:46:13,543 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 33 treesize of output 29 [2024-10-14 14:46:13,547 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-14 14:46:13,548 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 62 treesize of output 1 [2024-10-14 14:46:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:46:13,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095437575] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:46:13,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:46:13,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-10-14 14:46:13,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134145423] [2024-10-14 14:46:13,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:46:13,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 14:46:13,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:46:13,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 14:46:13,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2024-10-14 14:46:13,572 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-14 14:46:13,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 114 transitions, 1090 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:46:13,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:46:13,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-14 14:46:13,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:46:17,391 INFO L124 PetriNetUnfolderBase]: 336/748 cut-off events. [2024-10-14 14:46:17,391 INFO L125 PetriNetUnfolderBase]: For 3327/3327 co-relation queries the response was YES. [2024-10-14 14:46:17,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3635 conditions, 748 events. 336/748 cut-off events. For 3327/3327 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4204 event pairs, 17 based on Foata normal form. 9/757 useless extension candidates. Maximal degree in co-relation 3484. Up to 353 conditions per place. [2024-10-14 14:46:17,398 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 113 selfloop transitions, 82 changer transitions 10/206 dead transitions. [2024-10-14 14:46:17,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 206 transitions, 2043 flow [2024-10-14 14:46:17,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-14 14:46:17,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-10-14 14:46:17,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 229 transitions. [2024-10-14 14:46:17,400 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42407407407407405 [2024-10-14 14:46:17,400 INFO L175 Difference]: Start difference. First operand has 123 places, 114 transitions, 1090 flow. Second operand 27 states and 229 transitions. [2024-10-14 14:46:17,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 206 transitions, 2043 flow [2024-10-14 14:46:17,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 206 transitions, 1845 flow, removed 58 selfloop flow, removed 19 redundant places. [2024-10-14 14:46:17,420 INFO L231 Difference]: Finished difference. Result has 130 places, 136 transitions, 1400 flow [2024-10-14 14:46:17,420 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1400, PETRI_PLACES=130, PETRI_TRANSITIONS=136} [2024-10-14 14:46:17,421 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 109 predicate places. [2024-10-14 14:46:17,421 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 136 transitions, 1400 flow [2024-10-14 14:46:17,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:46:17,421 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:46:17,421 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:46:17,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 14:46:17,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:46:17,626 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:46:17,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:46:17,626 INFO L85 PathProgramCache]: Analyzing trace with hash -2031939214, now seen corresponding path program 4 times [2024-10-14 14:46:17,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:46:17,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354642261] [2024-10-14 14:46:17,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:46:17,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:46:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:46:17,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:46:17,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:46:17,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354642261] [2024-10-14 14:46:17,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354642261] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:46:17,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527342749] [2024-10-14 14:46:17,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:46:17,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:46:17,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:46:17,866 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) [2024-10-14 14:46:17,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 14:46:17,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:46:17,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:46:17,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-14 14:46:17,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:46:17,966 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 [2024-10-14 14:46:18,159 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:46:18,161 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2024-10-14 14:46:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:46:18,228 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:46:19,096 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 33 treesize of output 29 [2024-10-14 14:46:19,102 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:46:19,102 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 62 treesize of output 41 [2024-10-14 14:46:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:46:19,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527342749] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:46:19,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:46:19,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 20 [2024-10-14 14:46:19,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045960220] [2024-10-14 14:46:19,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:46:19,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-14 14:46:19,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:46:19,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-14 14:46:19,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2024-10-14 14:46:19,127 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-14 14:46:19,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 136 transitions, 1400 flow. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:46:19,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:46:19,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-14 14:46:19,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:46:19,817 INFO L124 PetriNetUnfolderBase]: 344/795 cut-off events. [2024-10-14 14:46:19,817 INFO L125 PetriNetUnfolderBase]: For 2914/2914 co-relation queries the response was YES. [2024-10-14 14:46:19,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3852 conditions, 795 events. 344/795 cut-off events. For 2914/2914 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4650 event pairs, 3 based on Foata normal form. 7/802 useless extension candidates. Maximal degree in co-relation 3678. Up to 330 conditions per place. [2024-10-14 14:46:19,825 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 102 selfloop transitions, 91 changer transitions 8/202 dead transitions. [2024-10-14 14:46:19,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 202 transitions, 2208 flow [2024-10-14 14:46:19,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-14 14:46:19,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-14 14:46:19,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 160 transitions. [2024-10-14 14:46:19,828 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-10-14 14:46:19,828 INFO L175 Difference]: Start difference. First operand has 130 places, 136 transitions, 1400 flow. Second operand 19 states and 160 transitions. [2024-10-14 14:46:19,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 202 transitions, 2208 flow [2024-10-14 14:46:19,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 202 transitions, 2118 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-10-14 14:46:19,853 INFO L231 Difference]: Finished difference. Result has 144 places, 153 transitions, 1801 flow [2024-10-14 14:46:19,854 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1321, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1801, PETRI_PLACES=144, PETRI_TRANSITIONS=153} [2024-10-14 14:46:19,854 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 123 predicate places. [2024-10-14 14:46:19,855 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 153 transitions, 1801 flow [2024-10-14 14:46:19,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:46:19,855 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:46:19,855 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:46:19,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 14:46:20,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-14 14:46:20,060 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:46:20,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:46:20,060 INFO L85 PathProgramCache]: Analyzing trace with hash 982989216, now seen corresponding path program 5 times [2024-10-14 14:46:20,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:46:20,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930450570] [2024-10-14 14:46:20,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:46:20,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:46:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:46:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:46:20,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:46:20,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930450570] [2024-10-14 14:46:20,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930450570] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:46:20,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742859264] [2024-10-14 14:46:20,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:46:20,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:46:20,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:46:20,190 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) [2024-10-14 14:46:20,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 14:46:20,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:46:20,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:46:20,277 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-14 14:46:20,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:46:20,303 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 [2024-10-14 14:46:20,510 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 15 treesize of output 7 [2024-10-14 14:46:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:46:20,524 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:46:21,460 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 33 treesize of output 29 [2024-10-14 14:46:21,468 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:46:21,469 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 62 treesize of output 41 [2024-10-14 14:46:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:46:21,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742859264] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:46:21,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:46:21,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-10-14 14:46:21,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171418918] [2024-10-14 14:46:21,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:46:21,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 14:46:21,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:46:21,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 14:46:21,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:46:21,498 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-14 14:46:21,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 153 transitions, 1801 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 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) [2024-10-14 14:46:21,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:46:21,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-14 14:46:21,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:46:22,816 INFO L124 PetriNetUnfolderBase]: 347/799 cut-off events. [2024-10-14 14:46:22,817 INFO L125 PetriNetUnfolderBase]: For 4141/4141 co-relation queries the response was YES. [2024-10-14 14:46:22,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4389 conditions, 799 events. 347/799 cut-off events. For 4141/4141 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4662 event pairs, 15 based on Foata normal form. 8/807 useless extension candidates. Maximal degree in co-relation 4192. Up to 556 conditions per place. [2024-10-14 14:46:22,825 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 116 selfloop transitions, 79 changer transitions 4/200 dead transitions. [2024-10-14 14:46:22,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 200 transitions, 2521 flow [2024-10-14 14:46:22,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-14 14:46:22,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-14 14:46:22,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 149 transitions. [2024-10-14 14:46:22,826 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39210526315789473 [2024-10-14 14:46:22,826 INFO L175 Difference]: Start difference. First operand has 144 places, 153 transitions, 1801 flow. Second operand 19 states and 149 transitions. [2024-10-14 14:46:22,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 200 transitions, 2521 flow [2024-10-14 14:46:22,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 200 transitions, 2354 flow, removed 34 selfloop flow, removed 14 redundant places. [2024-10-14 14:46:22,855 INFO L231 Difference]: Finished difference. Result has 153 places, 163 transitions, 2020 flow [2024-10-14 14:46:22,856 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1620, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2020, PETRI_PLACES=153, PETRI_TRANSITIONS=163} [2024-10-14 14:46:22,856 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 132 predicate places. [2024-10-14 14:46:22,857 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 163 transitions, 2020 flow [2024-10-14 14:46:22,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 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) [2024-10-14 14:46:22,857 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:46:22,857 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:46:22,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 14:46:23,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:46:23,058 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:46:23,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:46:23,058 INFO L85 PathProgramCache]: Analyzing trace with hash 183734254, now seen corresponding path program 6 times [2024-10-14 14:46:23,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:46:23,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384981483] [2024-10-14 14:46:23,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:46:23,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:46:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:46:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:46:23,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:46:23,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384981483] [2024-10-14 14:46:23,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384981483] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:46:23,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711995194] [2024-10-14 14:46:23,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 14:46:23,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:46:23,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:46:23,225 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) [2024-10-14 14:46:23,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 14:46:23,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-14 14:46:23,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:46:23,302 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-14 14:46:23,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:46:23,335 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 [2024-10-14 14:46:23,571 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 33 treesize of output 21 [2024-10-14 14:46:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:46:23,594 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:46:24,116 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 33 treesize of output 29 [2024-10-14 14:46:24,123 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:46:24,123 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 62 treesize of output 41 [2024-10-14 14:46:24,134 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 87 treesize of output 77 [2024-10-14 14:46:24,165 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2024-10-14 14:46:24,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 164 [2024-10-14 14:46:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:46:24,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711995194] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:46:24,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:46:24,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-10-14 14:46:24,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365195162] [2024-10-14 14:46:24,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:46:24,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 14:46:24,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:46:24,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 14:46:24,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-10-14 14:46:24,420 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-14 14:46:24,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 163 transitions, 2020 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 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) [2024-10-14 14:46:24,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:46:24,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-14 14:46:24,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:46:25,226 INFO L124 PetriNetUnfolderBase]: 364/851 cut-off events. [2024-10-14 14:46:25,226 INFO L125 PetriNetUnfolderBase]: For 4955/4955 co-relation queries the response was YES. [2024-10-14 14:46:25,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4863 conditions, 851 events. 364/851 cut-off events. For 4955/4955 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5165 event pairs, 7 based on Foata normal form. 12/863 useless extension candidates. Maximal degree in co-relation 4647. Up to 204 conditions per place. [2024-10-14 14:46:25,236 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 97 selfloop transitions, 87 changer transitions 45/230 dead transitions. [2024-10-14 14:46:25,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 230 transitions, 2918 flow [2024-10-14 14:46:25,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 14:46:25,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-14 14:46:25,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 176 transitions. [2024-10-14 14:46:25,239 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-10-14 14:46:25,239 INFO L175 Difference]: Start difference. First operand has 153 places, 163 transitions, 2020 flow. Second operand 22 states and 176 transitions. [2024-10-14 14:46:25,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 230 transitions, 2918 flow [2024-10-14 14:46:25,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 230 transitions, 2800 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-10-14 14:46:25,273 INFO L231 Difference]: Finished difference. Result has 172 places, 147 transitions, 1926 flow [2024-10-14 14:46:25,274 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1902, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1926, PETRI_PLACES=172, PETRI_TRANSITIONS=147} [2024-10-14 14:46:25,275 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 151 predicate places. [2024-10-14 14:46:25,276 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 147 transitions, 1926 flow [2024-10-14 14:46:25,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 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) [2024-10-14 14:46:25,276 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:46:25,276 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:46:25,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-14 14:46:25,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:46:25,477 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:46:25,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:46:25,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1061637456, now seen corresponding path program 7 times [2024-10-14 14:46:25,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:46:25,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047283590] [2024-10-14 14:46:25,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:46:25,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:46:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:46:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:46:25,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:46:25,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047283590] [2024-10-14 14:46:25,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047283590] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:46:25,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598561561] [2024-10-14 14:46:25,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 14:46:25,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:46:25,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:46:25,720 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) [2024-10-14 14:46:25,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 14:46:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:46:25,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-14 14:46:25,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:46:25,815 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 [2024-10-14 14:46:25,960 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:46:25,960 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 117 treesize of output 104 [2024-10-14 14:46:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:46:26,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:46:26,825 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 33 treesize of output 29 [2024-10-14 14:46:26,831 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:46:26,831 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 62 treesize of output 41 [2024-10-14 14:46:26,844 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 87 treesize of output 77 [2024-10-14 14:46:26,877 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2024-10-14 14:46:26,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 239 treesize of output 193 [2024-10-14 14:46:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:46:27,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598561561] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:46:27,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:46:27,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-10-14 14:46:27,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231752569] [2024-10-14 14:46:27,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:46:27,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 14:46:27,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:46:27,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 14:46:27,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-10-14 14:46:27,222 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-14 14:46:27,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 147 transitions, 1926 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 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) [2024-10-14 14:46:27,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:46:27,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-14 14:46:27,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:46:28,185 INFO L124 PetriNetUnfolderBase]: 303/694 cut-off events. [2024-10-14 14:46:28,185 INFO L125 PetriNetUnfolderBase]: For 5153/5153 co-relation queries the response was YES. [2024-10-14 14:46:28,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4300 conditions, 694 events. 303/694 cut-off events. For 5153/5153 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3815 event pairs, 14 based on Foata normal form. 4/698 useless extension candidates. Maximal degree in co-relation 4118. Up to 455 conditions per place. [2024-10-14 14:46:28,191 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 114 selfloop transitions, 73 changer transitions 9/197 dead transitions. [2024-10-14 14:46:28,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 197 transitions, 2589 flow [2024-10-14 14:46:28,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 14:46:28,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-14 14:46:28,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 175 transitions. [2024-10-14 14:46:28,193 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-10-14 14:46:28,193 INFO L175 Difference]: Start difference. First operand has 172 places, 147 transitions, 1926 flow. Second operand 22 states and 175 transitions. [2024-10-14 14:46:28,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 197 transitions, 2589 flow [2024-10-14 14:46:28,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 197 transitions, 2405 flow, removed 50 selfloop flow, removed 14 redundant places. [2024-10-14 14:46:28,218 INFO L231 Difference]: Finished difference. Result has 168 places, 148 transitions, 1938 flow [2024-10-14 14:46:28,218 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1752, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1938, PETRI_PLACES=168, PETRI_TRANSITIONS=148} [2024-10-14 14:46:28,219 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 147 predicate places. [2024-10-14 14:46:28,219 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 148 transitions, 1938 flow [2024-10-14 14:46:28,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 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) [2024-10-14 14:46:28,219 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:46:28,219 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:46:28,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-14 14:46:28,420 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,SelfDestructingSolverStorable12 [2024-10-14 14:46:28,420 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:46:28,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:46:28,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1485004561, now seen corresponding path program 8 times [2024-10-14 14:46:28,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:46:28,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635345490] [2024-10-14 14:46:28,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:46:28,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:46:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:46:28,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:46:28,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:46:28,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635345490] [2024-10-14 14:46:28,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635345490] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:46:28,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68553264] [2024-10-14 14:46:28,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:46:28,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:46:28,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:46:28,815 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) [2024-10-14 14:46:28,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 14:46:28,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:46:28,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:46:28,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-14 14:46:28,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:46:28,922 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 [2024-10-14 14:46:29,156 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:46:29,157 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2024-10-14 14:46:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:46:29,180 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:46:29,512 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 130 treesize of output 116 [2024-10-14 14:46:29,538 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:46:29,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 297 treesize of output 257 [2024-10-14 14:46:30,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:46:30,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68553264] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:46:30,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:46:30,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-10-14 14:46:30,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042965739] [2024-10-14 14:46:30,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:46:30,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-14 14:46:30,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:46:30,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-14 14:46:30,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2024-10-14 14:46:30,542 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-14 14:46:30,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 148 transitions, 1938 flow. Second operand has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 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) [2024-10-14 14:46:30,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:46:30,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-14 14:46:30,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:46:30,749 INFO L124 PetriNetUnfolderBase]: 303/686 cut-off events. [2024-10-14 14:46:30,749 INFO L125 PetriNetUnfolderBase]: For 4065/4065 co-relation queries the response was YES. [2024-10-14 14:46:30,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4048 conditions, 686 events. 303/686 cut-off events. For 4065/4065 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3763 event pairs, 28 based on Foata normal form. 4/690 useless extension candidates. Maximal degree in co-relation 3915. Up to 541 conditions per place. [2024-10-14 14:46:30,755 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 121 selfloop transitions, 15 changer transitions 32/169 dead transitions. [2024-10-14 14:46:30,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 169 transitions, 2386 flow [2024-10-14 14:46:30,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 14:46:30,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 14:46:30,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 78 transitions. [2024-10-14 14:46:30,757 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-10-14 14:46:30,757 INFO L175 Difference]: Start difference. First operand has 168 places, 148 transitions, 1938 flow. Second operand 9 states and 78 transitions. [2024-10-14 14:46:30,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 169 transitions, 2386 flow [2024-10-14 14:46:30,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 169 transitions, 2257 flow, removed 7 selfloop flow, removed 14 redundant places. [2024-10-14 14:46:30,780 INFO L231 Difference]: Finished difference. Result has 163 places, 133 transitions, 1666 flow [2024-10-14 14:46:30,780 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1809, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1666, PETRI_PLACES=163, PETRI_TRANSITIONS=133} [2024-10-14 14:46:30,781 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2024-10-14 14:46:30,781 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 133 transitions, 1666 flow [2024-10-14 14:46:30,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 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) [2024-10-14 14:46:30,782 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:46:30,782 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:46:30,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-14 14:46:30,985 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,SelfDestructingSolverStorable13 [2024-10-14 14:46:30,986 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:46:30,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:46:30,986 INFO L85 PathProgramCache]: Analyzing trace with hash 735477053, now seen corresponding path program 9 times [2024-10-14 14:46:30,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:46:30,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123317678] [2024-10-14 14:46:30,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:46:30,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:46:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:46:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:46:31,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:46:31,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123317678] [2024-10-14 14:46:31,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123317678] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:46:31,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198726724] [2024-10-14 14:46:31,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:46:31,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:46:31,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:46:31,149 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) [2024-10-14 14:46:31,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 14:46:31,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-14 14:46:31,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:46:31,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-14 14:46:31,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:46:31,266 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 [2024-10-14 14:46:31,292 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 [2024-10-14 14:46:31,478 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:46:31,479 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 115 treesize of output 109 [2024-10-14 14:46:31,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:46:31,641 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:46:32,177 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 47 treesize of output 43 [2024-10-14 14:46:32,188 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:46:32,188 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 462 treesize of output 369 [2024-10-14 14:46:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:46:32,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198726724] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:46:32,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:46:32,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 23 [2024-10-14 14:46:32,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839338228] [2024-10-14 14:46:32,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:46:32,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-14 14:46:32,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:46:32,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-14 14:46:32,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2024-10-14 14:46:32,298 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-14 14:46:32,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 133 transitions, 1666 flow. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 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) [2024-10-14 14:46:32,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:46:32,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-14 14:46:32,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:46:33,271 INFO L124 PetriNetUnfolderBase]: 279/608 cut-off events. [2024-10-14 14:46:33,272 INFO L125 PetriNetUnfolderBase]: For 3504/3504 co-relation queries the response was YES. [2024-10-14 14:46:33,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3554 conditions, 608 events. 279/608 cut-off events. For 3504/3504 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3160 event pairs, 4 based on Foata normal form. 2/610 useless extension candidates. Maximal degree in co-relation 3498. Up to 268 conditions per place. [2024-10-14 14:46:33,278 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 106 selfloop transitions, 71 changer transitions 4/182 dead transitions. [2024-10-14 14:46:33,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 182 transitions, 2313 flow [2024-10-14 14:46:33,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-14 14:46:33,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-14 14:46:33,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 146 transitions. [2024-10-14 14:46:33,279 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4294117647058823 [2024-10-14 14:46:33,279 INFO L175 Difference]: Start difference. First operand has 163 places, 133 transitions, 1666 flow. Second operand 17 states and 146 transitions. [2024-10-14 14:46:33,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 182 transitions, 2313 flow [2024-10-14 14:46:33,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 182 transitions, 2158 flow, removed 11 selfloop flow, removed 18 redundant places. [2024-10-14 14:46:33,299 INFO L231 Difference]: Finished difference. Result has 143 places, 134 transitions, 1685 flow [2024-10-14 14:46:33,299 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1685, PETRI_PLACES=143, PETRI_TRANSITIONS=134} [2024-10-14 14:46:33,300 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 122 predicate places. [2024-10-14 14:46:33,300 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 134 transitions, 1685 flow [2024-10-14 14:46:33,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 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) [2024-10-14 14:46:33,300 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:46:33,300 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]