./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f 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 ../sv-benchmarks/c/weaver/unroll-cond-2.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 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 13:54:58,083 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 13:54:58,144 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 13:54:58,149 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 13:54:58,149 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 13:54:58,175 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 13:54:58,176 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 13:54:58,177 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 13:54:58,177 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 13:54:58,179 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 13:54:58,179 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 13:54:58,179 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 13:54:58,179 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 13:54:58,181 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 13:54:58,181 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 13:54:58,181 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 13:54:58,182 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 13:54:58,182 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 13:54:58,182 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 13:54:58,182 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 13:54:58,182 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 13:54:58,183 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 13:54:58,185 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 13:54:58,185 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 13:54:58,185 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 13:54:58,185 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 13:54:58,186 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 13:54:58,186 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 13:54:58,186 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 13:54:58,186 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 13:54:58,186 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 13:54:58,186 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 13:54:58,187 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:54:58,187 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 13:54:58,187 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 13:54:58,187 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 13:54:58,187 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 13:54:58,188 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 13:54:58,188 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 13:54:58,189 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 13:54:58,189 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 13:54:58,189 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 13:54:58,189 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b [2024-11-22 13:54:58,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 13:54:58,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 13:54:58,419 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 13:54:58,420 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 13:54:58,421 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 13:54:58,422 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2024-11-22 13:54:59,704 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 13:54:59,875 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 13:54:59,876 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2024-11-22 13:54:59,882 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f5f2078e/ef6bb4bb349a4ab4bf90c0cbe177fb03/FLAG03c6b06b3 [2024-11-22 13:54:59,892 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f5f2078e/ef6bb4bb349a4ab4bf90c0cbe177fb03 [2024-11-22 13:54:59,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 13:54:59,896 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 13:54:59,896 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 13:54:59,897 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 13:54:59,901 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 13:54:59,901 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:54:59" (1/1) ... [2024-11-22 13:54:59,902 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c66f8a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:59, skipping insertion in model container [2024-11-22 13:54:59,902 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:54:59" (1/1) ... [2024-11-22 13:54:59,918 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 13:55:00,099 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c[2500,2513] [2024-11-22 13:55:00,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:55:00,117 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 13:55:00,134 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c[2500,2513] [2024-11-22 13:55:00,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 13:55:00,156 INFO L204 MainTranslator]: Completed translation [2024-11-22 13:55:00,156 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:00 WrapperNode [2024-11-22 13:55:00,157 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 13:55:00,157 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 13:55:00,158 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 13:55:00,158 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 13:55:00,164 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:00" (1/1) ... [2024-11-22 13:55:00,176 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:00" (1/1) ... [2024-11-22 13:55:00,200 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 134 [2024-11-22 13:55:00,200 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 13:55:00,202 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 13:55:00,202 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 13:55:00,202 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 13:55:00,212 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:00" (1/1) ... [2024-11-22 13:55:00,212 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:00" (1/1) ... [2024-11-22 13:55:00,214 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:00" (1/1) ... [2024-11-22 13:55:00,236 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 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]. [2024-11-22 13:55:00,237 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:00" (1/1) ... [2024-11-22 13:55:00,237 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:00" (1/1) ... [2024-11-22 13:55:00,244 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:00" (1/1) ... [2024-11-22 13:55:00,248 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:00" (1/1) ... [2024-11-22 13:55:00,249 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:00" (1/1) ... [2024-11-22 13:55:00,254 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:00" (1/1) ... [2024-11-22 13:55:00,256 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 13:55:00,256 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 13:55:00,258 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 13:55:00,259 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 13:55:00,260 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:00" (1/1) ... [2024-11-22 13:55:00,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 13:55:00,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:00,292 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) [2024-11-22 13:55:00,294 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 [2024-11-22 13:55:00,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 13:55:00,332 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 13:55:00,332 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 13:55:00,332 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 13:55:00,332 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 13:55:00,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 13:55:00,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 13:55:00,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 13:55:00,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 13:55:00,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 13:55:00,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 13:55:00,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 13:55:00,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 13:55:00,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 13:55:00,335 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 13:55:00,423 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 13:55:00,425 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 13:55:00,719 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 13:55:00,720 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 13:55:00,892 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 13:55:00,893 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-22 13:55:00,893 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:55:00 BoogieIcfgContainer [2024-11-22 13:55:00,893 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 13:55:00,896 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 13:55:00,896 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 13:55:00,899 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 13:55:00,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:54:59" (1/3) ... [2024-11-22 13:55:00,900 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560a917f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:55:00, skipping insertion in model container [2024-11-22 13:55:00,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:00" (2/3) ... [2024-11-22 13:55:00,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560a917f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:55:00, skipping insertion in model container [2024-11-22 13:55:00,901 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:55:00" (3/3) ... [2024-11-22 13:55:00,902 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2024-11-22 13:55:00,915 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 13:55:00,915 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 13:55:00,915 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 13:55:00,945 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-22 13:55:00,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-11-22 13:55:01,007 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-11-22 13:55:01,008 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 13:55:01,011 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 2. Compared 10 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. [2024-11-22 13:55:01,011 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-11-22 13:55:01,014 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-11-22 13:55:01,025 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 13:55:01,033 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;@777703ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 13:55:01,033 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-22 13:55:01,044 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 13:55:01,044 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-11-22 13:55:01,044 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 13:55:01,045 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:01,045 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:01,046 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:01,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:01,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1382470306, now seen corresponding path program 1 times [2024-11-22 13:55:01,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:01,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691722517] [2024-11-22 13:55:01,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:55:01,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:55:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:55:01,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:01,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691722517] [2024-11-22 13:55:01,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691722517] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:55:01,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:55:01,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 13:55:01,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535898396] [2024-11-22 13:55:01,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:55:01,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 13:55:01,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:01,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 13:55:01,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 13:55:01,424 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:01,426 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) [2024-11-22 13:55:01,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:01,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:01,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:01,486 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2024-11-22 13:55:01,486 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-22 13:55:01,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 71 events. 38/71 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 118 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. [2024-11-22 13:55:01,489 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 15 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2024-11-22 13:55:01,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 82 flow [2024-11-22 13:55:01,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 13:55:01,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 13:55:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2024-11-22 13:55:01,498 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-11-22 13:55:01,500 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 27 transitions. [2024-11-22 13:55:01,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 82 flow [2024-11-22 13:55:01,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 13:55:01,504 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2024-11-22 13:55:01,505 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} [2024-11-22 13:55:01,509 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-11-22 13:55:01,509 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2024-11-22 13:55:01,509 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) [2024-11-22 13:55:01,509 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:01,510 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:01,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 13:55:01,510 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:01,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:01,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1898578683, now seen corresponding path program 1 times [2024-11-22 13:55:01,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:01,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340460639] [2024-11-22 13:55:01,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:55:01,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:55:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:55:01,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:01,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340460639] [2024-11-22 13:55:01,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340460639] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:55:01,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:55:01,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 13:55:01,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866888964] [2024-11-22 13:55:01,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:55:01,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 13:55:01,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:01,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 13:55:01,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-22 13:55:01,826 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:01,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 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) [2024-11-22 13:55:01,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:01,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:01,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:01,994 INFO L124 PetriNetUnfolderBase]: 67/123 cut-off events. [2024-11-22 13:55:01,994 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 13:55:01,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 123 events. 67/123 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 328 event pairs, 2 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 249. Up to 77 conditions per place. [2024-11-22 13:55:01,995 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 30 selfloop transitions, 11 changer transitions 2/44 dead transitions. [2024-11-22 13:55:01,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 44 transitions, 194 flow [2024-11-22 13:55:01,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 13:55:01,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 13:55:01,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2024-11-22 13:55:01,999 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-11-22 13:55:01,999 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 6 states and 62 transitions. [2024-11-22 13:55:02,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 44 transitions, 194 flow [2024-11-22 13:55:02,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 44 transitions, 190 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-22 13:55:02,001 INFO L231 Difference]: Finished difference. Result has 27 places, 28 transitions, 114 flow [2024-11-22 13:55:02,003 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=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=27, PETRI_TRANSITIONS=28} [2024-11-22 13:55:02,003 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2024-11-22 13:55:02,004 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 28 transitions, 114 flow [2024-11-22 13:55:02,004 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) [2024-11-22 13:55:02,004 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:02,004 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:02,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 13:55:02,004 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:02,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:02,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1602650249, now seen corresponding path program 2 times [2024-11-22 13:55:02,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:02,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230014965] [2024-11-22 13:55:02,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:55:02,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:02,032 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 13:55:02,033 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:55:02,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:02,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230014965] [2024-11-22 13:55:02,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230014965] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:55:02,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:55:02,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 13:55:02,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750765692] [2024-11-22 13:55:02,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:55:02,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 13:55:02,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:02,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 13:55:02,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-22 13:55:02,201 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:02,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 28 transitions, 114 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) [2024-11-22 13:55:02,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:02,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:02,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:02,321 INFO L124 PetriNetUnfolderBase]: 67/125 cut-off events. [2024-11-22 13:55:02,321 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-22 13:55:02,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 125 events. 67/125 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 328 event pairs, 0 based on Foata normal form. 1/104 useless extension candidates. Maximal degree in co-relation 362. Up to 77 conditions per place. [2024-11-22 13:55:02,323 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 29 selfloop transitions, 15 changer transitions 2/47 dead transitions. [2024-11-22 13:55:02,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 47 transitions, 268 flow [2024-11-22 13:55:02,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 13:55:02,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 13:55:02,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 64 transitions. [2024-11-22 13:55:02,326 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-11-22 13:55:02,326 INFO L175 Difference]: Start difference. First operand has 27 places, 28 transitions, 114 flow. Second operand 7 states and 64 transitions. [2024-11-22 13:55:02,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 47 transitions, 268 flow [2024-11-22 13:55:02,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 47 transitions, 260 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-22 13:55:02,328 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 173 flow [2024-11-22 13:55:02,328 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=173, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2024-11-22 13:55:02,329 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2024-11-22 13:55:02,329 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 173 flow [2024-11-22 13:55:02,329 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) [2024-11-22 13:55:02,330 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:02,330 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:02,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 13:55:02,331 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:02,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:02,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1602055603, now seen corresponding path program 3 times [2024-11-22 13:55:02,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:02,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831629905] [2024-11-22 13:55:02,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:55:02,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:02,347 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-22 13:55:02,349 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:55:02,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:02,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831629905] [2024-11-22 13:55:02,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831629905] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 13:55:02,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 13:55:02,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 13:55:02,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735572020] [2024-11-22 13:55:02,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 13:55:02,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 13:55:02,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:02,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 13:55:02,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-22 13:55:02,528 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:02,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 173 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) [2024-11-22 13:55:02,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:02,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:02,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:02,682 INFO L124 PetriNetUnfolderBase]: 83/158 cut-off events. [2024-11-22 13:55:02,683 INFO L125 PetriNetUnfolderBase]: For 107/107 co-relation queries the response was YES. [2024-11-22 13:55:02,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 158 events. 83/158 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 452 event pairs, 6 based on Foata normal form. 1/130 useless extension candidates. Maximal degree in co-relation 520. Up to 58 conditions per place. [2024-11-22 13:55:02,685 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 35 selfloop transitions, 19 changer transitions 2/57 dead transitions. [2024-11-22 13:55:02,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 57 transitions, 368 flow [2024-11-22 13:55:02,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 13:55:02,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 13:55:02,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 76 transitions. [2024-11-22 13:55:02,687 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-11-22 13:55:02,687 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 173 flow. Second operand 8 states and 76 transitions. [2024-11-22 13:55:02,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 57 transitions, 368 flow [2024-11-22 13:55:02,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 57 transitions, 341 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-11-22 13:55:02,693 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 232 flow [2024-11-22 13:55:02,693 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=232, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2024-11-22 13:55:02,694 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2024-11-22 13:55:02,694 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 232 flow [2024-11-22 13:55:02,695 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) [2024-11-22 13:55:02,695 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:02,695 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:02,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 13:55:02,695 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:02,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:02,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1373918319, now seen corresponding path program 1 times [2024-11-22 13:55:02,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:02,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268298369] [2024-11-22 13:55:02,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:55:02,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:02,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:55:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:55:02,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:02,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268298369] [2024-11-22 13:55:02,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268298369] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:02,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601176785] [2024-11-22 13:55:02,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:55:02,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:02,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:02,873 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) [2024-11-22 13:55:02,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 13:55:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:55:02,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-22 13:55:02,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:03,078 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 [2024-11-22 13:55:03,357 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:55:03,357 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 23 treesize of output 17 [2024-11-22 13:55:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:55:03,373 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:03,910 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 72 treesize of output 64 [2024-11-22 13:55:03,931 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:55:03,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 129 [2024-11-22 13:55:04,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:55:04,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601176785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:04,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:04,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 22 [2024-11-22 13:55:04,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563407018] [2024-11-22 13:55:04,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:04,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 13:55:04,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:04,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 13:55:04,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2024-11-22 13:55:04,281 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:04,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 232 flow. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 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) [2024-11-22 13:55:04,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:04,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:04,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:05,187 INFO L124 PetriNetUnfolderBase]: 273/493 cut-off events. [2024-11-22 13:55:05,188 INFO L125 PetriNetUnfolderBase]: For 716/716 co-relation queries the response was YES. [2024-11-22 13:55:05,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1862 conditions, 493 events. 273/493 cut-off events. For 716/716 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1979 event pairs, 26 based on Foata normal form. 13/504 useless extension candidates. Maximal degree in co-relation 1213. Up to 171 conditions per place. [2024-11-22 13:55:05,191 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 71 selfloop transitions, 41 changer transitions 54/167 dead transitions. [2024-11-22 13:55:05,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 167 transitions, 1184 flow [2024-11-22 13:55:05,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-22 13:55:05,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-22 13:55:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 239 transitions. [2024-11-22 13:55:05,196 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4425925925925926 [2024-11-22 13:55:05,196 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 232 flow. Second operand 27 states and 239 transitions. [2024-11-22 13:55:05,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 167 transitions, 1184 flow [2024-11-22 13:55:05,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 167 transitions, 1129 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-22 13:55:05,209 INFO L231 Difference]: Finished difference. Result has 77 places, 59 transitions, 496 flow [2024-11-22 13:55:05,209 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=496, PETRI_PLACES=77, PETRI_TRANSITIONS=59} [2024-11-22 13:55:05,209 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2024-11-22 13:55:05,210 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 59 transitions, 496 flow [2024-11-22 13:55:05,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 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) [2024-11-22 13:55:05,210 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:05,210 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:05,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 13:55:05,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:05,415 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:05,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:05,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1621282384, now seen corresponding path program 1 times [2024-11-22 13:55:05,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:05,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051475531] [2024-11-22 13:55:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:55:05,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:55:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:55:05,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:05,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051475531] [2024-11-22 13:55:05,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051475531] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:05,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462063510] [2024-11-22 13:55:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:55:05,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:05,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:05,655 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) [2024-11-22 13:55:05,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 13:55:05,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:55:05,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-22 13:55:05,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:05,782 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 [2024-11-22 13:55:05,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:55:05,785 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:05,985 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:55:05,986 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 42 treesize of output 22 [2024-11-22 13:55:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:55:06,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462063510] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:06,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:06,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2024-11-22 13:55:06,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108943290] [2024-11-22 13:55:06,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:06,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 13:55:06,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:06,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 13:55:06,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2024-11-22 13:55:06,041 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:06,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 59 transitions, 496 flow. Second operand has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:55:06,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:06,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:06,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:06,265 INFO L124 PetriNetUnfolderBase]: 217/389 cut-off events. [2024-11-22 13:55:06,265 INFO L125 PetriNetUnfolderBase]: For 1487/1487 co-relation queries the response was YES. [2024-11-22 13:55:06,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1906 conditions, 389 events. 217/389 cut-off events. For 1487/1487 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1439 event pairs, 9 based on Foata normal form. 1/388 useless extension candidates. Maximal degree in co-relation 1848. Up to 236 conditions per place. [2024-11-22 13:55:06,269 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 59 selfloop transitions, 35 changer transitions 3/98 dead transitions. [2024-11-22 13:55:06,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 98 transitions, 916 flow [2024-11-22 13:55:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 13:55:06,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 13:55:06,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2024-11-22 13:55:06,270 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-11-22 13:55:06,270 INFO L175 Difference]: Start difference. First operand has 77 places, 59 transitions, 496 flow. Second operand 10 states and 94 transitions. [2024-11-22 13:55:06,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 98 transitions, 916 flow [2024-11-22 13:55:06,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 98 transitions, 795 flow, removed 47 selfloop flow, removed 12 redundant places. [2024-11-22 13:55:06,276 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 590 flow [2024-11-22 13:55:06,276 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=590, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2024-11-22 13:55:06,277 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 47 predicate places. [2024-11-22 13:55:06,277 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 590 flow [2024-11-22 13:55:06,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 16 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:55:06,277 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:06,277 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:06,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 13:55:06,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-22 13:55:06,482 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:06,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:06,482 INFO L85 PathProgramCache]: Analyzing trace with hash 948205454, now seen corresponding path program 2 times [2024-11-22 13:55:06,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:06,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571559808] [2024-11-22 13:55:06,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:55:06,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:06,505 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:55:06,505 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:55:06,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:06,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571559808] [2024-11-22 13:55:06,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571559808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:06,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545214320] [2024-11-22 13:55:06,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:55:06,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:06,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:06,659 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) [2024-11-22 13:55:06,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 13:55:06,711 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:55:06,711 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:06,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-22 13:55:06,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:06,802 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 [2024-11-22 13:55:06,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:55:06,805 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:06,912 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:55:06,912 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 48 treesize of output 33 [2024-11-22 13:55:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:55:06,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545214320] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:06,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:06,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2024-11-22 13:55:06,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33795030] [2024-11-22 13:55:06,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:06,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 13:55:06,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:06,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 13:55:06,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-22 13:55:06,982 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:06,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 590 flow. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 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) [2024-11-22 13:55:06,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:06,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:06,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:07,189 INFO L124 PetriNetUnfolderBase]: 221/402 cut-off events. [2024-11-22 13:55:07,189 INFO L125 PetriNetUnfolderBase]: For 1330/1330 co-relation queries the response was YES. [2024-11-22 13:55:07,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1947 conditions, 402 events. 221/402 cut-off events. For 1330/1330 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1524 event pairs, 25 based on Foata normal form. 1/403 useless extension candidates. Maximal degree in co-relation 1823. Up to 303 conditions per place. [2024-11-22 13:55:07,192 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 62 selfloop transitions, 33 changer transitions 3/99 dead transitions. [2024-11-22 13:55:07,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 99 transitions, 914 flow [2024-11-22 13:55:07,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-22 13:55:07,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-22 13:55:07,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 91 transitions. [2024-11-22 13:55:07,193 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2024-11-22 13:55:07,193 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 590 flow. Second operand 11 states and 91 transitions. [2024-11-22 13:55:07,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 99 transitions, 914 flow [2024-11-22 13:55:07,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 99 transitions, 856 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-11-22 13:55:07,199 INFO L231 Difference]: Finished difference. Result has 78 places, 77 transitions, 681 flow [2024-11-22 13:55:07,199 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=681, PETRI_PLACES=78, PETRI_TRANSITIONS=77} [2024-11-22 13:55:07,199 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 57 predicate places. [2024-11-22 13:55:07,200 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 681 flow [2024-11-22 13:55:07,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 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) [2024-11-22 13:55:07,200 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:07,200 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:07,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-22 13:55:07,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:07,405 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:07,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:07,406 INFO L85 PathProgramCache]: Analyzing trace with hash 167384518, now seen corresponding path program 3 times [2024-11-22 13:55:07,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:07,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778536443] [2024-11-22 13:55:07,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:55:07,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:07,423 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 13:55:07,423 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:55:07,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:07,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778536443] [2024-11-22 13:55:07,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778536443] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:07,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247337893] [2024-11-22 13:55:07,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:55:07,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:07,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:07,588 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) [2024-11-22 13:55:07,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 13:55:07,636 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 13:55:07,637 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:07,637 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-22 13:55:07,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:07,754 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 [2024-11-22 13:55:07,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:55:07,760 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:07,819 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:55:07,820 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 77 treesize of output 69 [2024-11-22 13:55:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:55:07,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247337893] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:07,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:07,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2024-11-22 13:55:07,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252616551] [2024-11-22 13:55:07,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:07,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 13:55:07,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:07,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 13:55:07,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-11-22 13:55:07,931 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:07,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 681 flow. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:55:07,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:07,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:07,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:08,240 INFO L124 PetriNetUnfolderBase]: 235/460 cut-off events. [2024-11-22 13:55:08,240 INFO L125 PetriNetUnfolderBase]: For 1418/1418 co-relation queries the response was YES. [2024-11-22 13:55:08,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2175 conditions, 460 events. 235/460 cut-off events. For 1418/1418 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2000 event pairs, 0 based on Foata normal form. 1/461 useless extension candidates. Maximal degree in co-relation 2017. Up to 241 conditions per place. [2024-11-22 13:55:08,243 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 70 selfloop transitions, 45 changer transitions 8/124 dead transitions. [2024-11-22 13:55:08,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 124 transitions, 1180 flow [2024-11-22 13:55:08,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 13:55:08,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-22 13:55:08,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 110 transitions. [2024-11-22 13:55:08,245 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-11-22 13:55:08,245 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 681 flow. Second operand 14 states and 110 transitions. [2024-11-22 13:55:08,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 124 transitions, 1180 flow [2024-11-22 13:55:08,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 124 transitions, 1109 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-22 13:55:08,252 INFO L231 Difference]: Finished difference. Result has 87 places, 91 transitions, 873 flow [2024-11-22 13:55:08,253 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=873, PETRI_PLACES=87, PETRI_TRANSITIONS=91} [2024-11-22 13:55:08,254 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 66 predicate places. [2024-11-22 13:55:08,255 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 91 transitions, 873 flow [2024-11-22 13:55:08,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:55:08,255 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:08,256 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:08,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 13:55:08,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:08,456 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:08,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:08,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1701616482, now seen corresponding path program 2 times [2024-11-22 13:55:08,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:08,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690049002] [2024-11-22 13:55:08,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:55:08,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:08,471 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:55:08,471 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:08,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:08,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690049002] [2024-11-22 13:55:08,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690049002] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:08,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775365712] [2024-11-22 13:55:08,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:55:08,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:08,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:08,596 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) [2024-11-22 13:55:08,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 13:55:08,659 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:55:08,660 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:08,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 13:55:08,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:08,707 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:08,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775365712] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:08,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:08,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-22 13:55:08,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353203714] [2024-11-22 13:55:08,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:08,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 13:55:08,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:08,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 13:55:08,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-22 13:55:08,872 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:08,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 91 transitions, 873 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 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) [2024-11-22 13:55:08,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:08,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:08,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:09,382 INFO L124 PetriNetUnfolderBase]: 385/773 cut-off events. [2024-11-22 13:55:09,382 INFO L125 PetriNetUnfolderBase]: For 3489/3489 co-relation queries the response was YES. [2024-11-22 13:55:09,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4039 conditions, 773 events. 385/773 cut-off events. For 3489/3489 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3965 event pairs, 52 based on Foata normal form. 21/794 useless extension candidates. Maximal degree in co-relation 3903. Up to 231 conditions per place. [2024-11-22 13:55:09,387 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 121 selfloop transitions, 93 changer transitions 0/215 dead transitions. [2024-11-22 13:55:09,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 215 transitions, 2307 flow [2024-11-22 13:55:09,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-22 13:55:09,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-22 13:55:09,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 176 transitions. [2024-11-22 13:55:09,389 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4631578947368421 [2024-11-22 13:55:09,389 INFO L175 Difference]: Start difference. First operand has 87 places, 91 transitions, 873 flow. Second operand 19 states and 176 transitions. [2024-11-22 13:55:09,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 215 transitions, 2307 flow [2024-11-22 13:55:09,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 215 transitions, 2118 flow, removed 61 selfloop flow, removed 10 redundant places. [2024-11-22 13:55:09,401 INFO L231 Difference]: Finished difference. Result has 106 places, 152 transitions, 1787 flow [2024-11-22 13:55:09,401 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1787, PETRI_PLACES=106, PETRI_TRANSITIONS=152} [2024-11-22 13:55:09,402 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 85 predicate places. [2024-11-22 13:55:09,402 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 152 transitions, 1787 flow [2024-11-22 13:55:09,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 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) [2024-11-22 13:55:09,402 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:09,402 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:09,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 13:55:09,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:09,603 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:09,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:09,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1496977885, now seen corresponding path program 4 times [2024-11-22 13:55:09,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:09,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147270372] [2024-11-22 13:55:09,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:55:09,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:09,615 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:55:09,615 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:55:09,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:09,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147270372] [2024-11-22 13:55:09,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147270372] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:09,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93711129] [2024-11-22 13:55:09,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:55:09,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:09,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:09,750 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) [2024-11-22 13:55:09,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 13:55:09,805 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:55:09,805 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:09,806 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-22 13:55:09,808 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:09,830 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 [2024-11-22 13:55:10,012 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 [2024-11-22 13:55:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:55:10,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:10,425 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 [2024-11-22 13:55:10,446 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 13:55:10,446 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 [2024-11-22 13:55:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:55:10,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93711129] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:10,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:10,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2024-11-22 13:55:10,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088584250] [2024-11-22 13:55:10,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:10,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 13:55:10,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:10,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 13:55:10,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-11-22 13:55:10,483 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:10,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 152 transitions, 1787 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 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) [2024-11-22 13:55:10,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:10,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:10,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:12,204 INFO L124 PetriNetUnfolderBase]: 579/1187 cut-off events. [2024-11-22 13:55:12,205 INFO L125 PetriNetUnfolderBase]: For 8138/8138 co-relation queries the response was YES. [2024-11-22 13:55:12,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6994 conditions, 1187 events. 579/1187 cut-off events. For 8138/8138 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 6991 event pairs, 23 based on Foata normal form. 39/1225 useless extension candidates. Maximal degree in co-relation 6856. Up to 285 conditions per place. [2024-11-22 13:55:12,211 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 143 selfloop transitions, 84 changer transitions 111/339 dead transitions. [2024-11-22 13:55:12,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 339 transitions, 4001 flow [2024-11-22 13:55:12,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-22 13:55:12,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-22 13:55:12,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 321 transitions. [2024-11-22 13:55:12,213 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47205882352941175 [2024-11-22 13:55:12,213 INFO L175 Difference]: Start difference. First operand has 106 places, 152 transitions, 1787 flow. Second operand 34 states and 321 transitions. [2024-11-22 13:55:12,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 339 transitions, 4001 flow [2024-11-22 13:55:12,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 339 transitions, 3837 flow, removed 82 selfloop flow, removed 0 redundant places. [2024-11-22 13:55:12,235 INFO L231 Difference]: Finished difference. Result has 149 places, 148 transitions, 1839 flow [2024-11-22 13:55:12,235 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1638, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1839, PETRI_PLACES=149, PETRI_TRANSITIONS=148} [2024-11-22 13:55:12,236 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 128 predicate places. [2024-11-22 13:55:12,236 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 148 transitions, 1839 flow [2024-11-22 13:55:12,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 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) [2024-11-22 13:55:12,236 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:12,236 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:12,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 13:55:12,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:12,441 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:12,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:12,441 INFO L85 PathProgramCache]: Analyzing trace with hash 857927311, now seen corresponding path program 5 times [2024-11-22 13:55:12,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:12,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367853222] [2024-11-22 13:55:12,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:55:12,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:12,453 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:55:12,453 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:55:12,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:12,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367853222] [2024-11-22 13:55:12,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367853222] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:12,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262715834] [2024-11-22 13:55:12,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:55:12,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:12,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:12,539 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) [2024-11-22 13:55:12,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 13:55:12,589 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:55:12,589 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:12,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-22 13:55:12,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:12,613 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 [2024-11-22 13:55:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:55:12,732 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:13,033 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 [2024-11-22 13:55:13,061 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:55:13,061 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 334 treesize of output 282 [2024-11-22 13:55:14,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:55:14,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262715834] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:14,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:14,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2024-11-22 13:55:14,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803437644] [2024-11-22 13:55:14,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:14,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 13:55:14,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:14,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 13:55:14,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-11-22 13:55:14,081 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:14,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 148 transitions, 1839 flow. Second operand has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 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) [2024-11-22 13:55:14,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:14,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:14,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:14,847 INFO L124 PetriNetUnfolderBase]: 465/940 cut-off events. [2024-11-22 13:55:14,847 INFO L125 PetriNetUnfolderBase]: For 8632/8632 co-relation queries the response was YES. [2024-11-22 13:55:14,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6197 conditions, 940 events. 465/940 cut-off events. For 8632/8632 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5150 event pairs, 14 based on Foata normal form. 6/945 useless extension candidates. Maximal degree in co-relation 6006. Up to 320 conditions per place. [2024-11-22 13:55:14,854 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 118 selfloop transitions, 84 changer transitions 45/248 dead transitions. [2024-11-22 13:55:14,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 248 transitions, 3184 flow [2024-11-22 13:55:14,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-22 13:55:14,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-22 13:55:14,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 241 transitions. [2024-11-22 13:55:14,856 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3765625 [2024-11-22 13:55:14,856 INFO L175 Difference]: Start difference. First operand has 149 places, 148 transitions, 1839 flow. Second operand 32 states and 241 transitions. [2024-11-22 13:55:14,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 248 transitions, 3184 flow [2024-11-22 13:55:14,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 248 transitions, 2940 flow, removed 85 selfloop flow, removed 19 redundant places. [2024-11-22 13:55:14,879 INFO L231 Difference]: Finished difference. Result has 156 places, 159 transitions, 2149 flow [2024-11-22 13:55:14,880 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2149, PETRI_PLACES=156, PETRI_TRANSITIONS=159} [2024-11-22 13:55:14,880 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 135 predicate places. [2024-11-22 13:55:14,880 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 159 transitions, 2149 flow [2024-11-22 13:55:14,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 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) [2024-11-22 13:55:14,880 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:14,881 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:14,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-22 13:55:15,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:15,082 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:15,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:15,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1622968242, now seen corresponding path program 3 times [2024-11-22 13:55:15,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:15,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636915541] [2024-11-22 13:55:15,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:55:15,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:15,094 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 13:55:15,094 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:15,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:15,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636915541] [2024-11-22 13:55:15,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636915541] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:15,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952646652] [2024-11-22 13:55:15,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:55:15,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:15,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:15,175 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) [2024-11-22 13:55:15,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 13:55:15,403 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 13:55:15,403 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:15,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 13:55:15,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:15,440 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:15,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:15,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952646652] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:15,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:15,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-22 13:55:15,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539555028] [2024-11-22 13:55:15,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:15,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 13:55:15,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:15,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 13:55:15,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-22 13:55:15,525 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:15,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 159 transitions, 2149 flow. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:55:15,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:15,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:15,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:15,919 INFO L124 PetriNetUnfolderBase]: 435/824 cut-off events. [2024-11-22 13:55:15,920 INFO L125 PetriNetUnfolderBase]: For 8325/8325 co-relation queries the response was YES. [2024-11-22 13:55:15,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5751 conditions, 824 events. 435/824 cut-off events. For 8325/8325 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4100 event pairs, 78 based on Foata normal form. 18/841 useless extension candidates. Maximal degree in co-relation 5680. Up to 383 conditions per place. [2024-11-22 13:55:15,925 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 135 selfloop transitions, 73 changer transitions 0/209 dead transitions. [2024-11-22 13:55:15,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 209 transitions, 2999 flow [2024-11-22 13:55:15,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 13:55:15,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-22 13:55:15,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 137 transitions. [2024-11-22 13:55:15,926 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48928571428571427 [2024-11-22 13:55:15,927 INFO L175 Difference]: Start difference. First operand has 156 places, 159 transitions, 2149 flow. Second operand 14 states and 137 transitions. [2024-11-22 13:55:15,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 209 transitions, 2999 flow [2024-11-22 13:55:15,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 209 transitions, 2485 flow, removed 224 selfloop flow, removed 14 redundant places. [2024-11-22 13:55:15,951 INFO L231 Difference]: Finished difference. Result has 136 places, 161 transitions, 1939 flow [2024-11-22 13:55:15,951 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1939, PETRI_PLACES=136, PETRI_TRANSITIONS=161} [2024-11-22 13:55:15,952 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 115 predicate places. [2024-11-22 13:55:15,952 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 161 transitions, 1939 flow [2024-11-22 13:55:15,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:55:15,952 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:15,952 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:15,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-22 13:55:16,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-22 13:55:16,157 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:16,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:16,158 INFO L85 PathProgramCache]: Analyzing trace with hash -263196074, now seen corresponding path program 4 times [2024-11-22 13:55:16,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:16,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038115909] [2024-11-22 13:55:16,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:55:16,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:16,168 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:55:16,169 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:16,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:16,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:16,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038115909] [2024-11-22 13:55:16,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038115909] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:16,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701419711] [2024-11-22 13:55:16,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:55:16,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:16,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:16,239 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) [2024-11-22 13:55:16,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 13:55:16,344 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:55:16,344 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:16,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 13:55:16,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:16,387 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:16,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701419711] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:16,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:16,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-22 13:55:16,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743727501] [2024-11-22 13:55:16,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:16,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 13:55:16,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:16,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 13:55:16,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-11-22 13:55:16,438 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:16,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 161 transitions, 1939 flow. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 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) [2024-11-22 13:55:16,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:16,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:16,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:16,988 INFO L124 PetriNetUnfolderBase]: 769/1479 cut-off events. [2024-11-22 13:55:16,988 INFO L125 PetriNetUnfolderBase]: For 15273/15273 co-relation queries the response was YES. [2024-11-22 13:55:16,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9965 conditions, 1479 events. 769/1479 cut-off events. For 15273/15273 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 8586 event pairs, 15 based on Foata normal form. 6/1484 useless extension candidates. Maximal degree in co-relation 9900. Up to 415 conditions per place. [2024-11-22 13:55:16,999 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 183 selfloop transitions, 143 changer transitions 0/327 dead transitions. [2024-11-22 13:55:16,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 327 transitions, 4658 flow [2024-11-22 13:55:16,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-22 13:55:16,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-22 13:55:17,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 160 transitions. [2024-11-22 13:55:17,001 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-11-22 13:55:17,001 INFO L175 Difference]: Start difference. First operand has 136 places, 161 transitions, 1939 flow. Second operand 17 states and 160 transitions. [2024-11-22 13:55:17,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 327 transitions, 4658 flow [2024-11-22 13:55:17,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 327 transitions, 4450 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-11-22 13:55:17,037 INFO L231 Difference]: Finished difference. Result has 149 places, 245 transitions, 3382 flow [2024-11-22 13:55:17,037 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1790, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3382, PETRI_PLACES=149, PETRI_TRANSITIONS=245} [2024-11-22 13:55:17,037 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 128 predicate places. [2024-11-22 13:55:17,037 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 245 transitions, 3382 flow [2024-11-22 13:55:17,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 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) [2024-11-22 13:55:17,038 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:17,038 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:17,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-22 13:55:17,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-22 13:55:17,238 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:17,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:17,239 INFO L85 PathProgramCache]: Analyzing trace with hash 532491012, now seen corresponding path program 5 times [2024-11-22 13:55:17,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:17,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544940587] [2024-11-22 13:55:17,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:55:17,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:17,261 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:55:17,261 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:17,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:17,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:17,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544940587] [2024-11-22 13:55:17,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544940587] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:17,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187567899] [2024-11-22 13:55:17,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:55:17,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:17,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:17,382 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) [2024-11-22 13:55:17,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 13:55:17,473 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:55:17,473 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:17,475 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 13:55:17,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:17,509 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:17,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187567899] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:17,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:17,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-22 13:55:17,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498267565] [2024-11-22 13:55:17,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:17,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 13:55:17,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:17,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 13:55:17,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-22 13:55:17,612 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:17,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 245 transitions, 3382 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 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) [2024-11-22 13:55:17,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:17,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:17,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:18,301 INFO L124 PetriNetUnfolderBase]: 884/1725 cut-off events. [2024-11-22 13:55:18,302 INFO L125 PetriNetUnfolderBase]: For 21586/21586 co-relation queries the response was YES. [2024-11-22 13:55:18,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12423 conditions, 1725 events. 884/1725 cut-off events. For 21586/21586 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10566 event pairs, 197 based on Foata normal form. 27/1751 useless extension candidates. Maximal degree in co-relation 12353. Up to 1142 conditions per place. [2024-11-22 13:55:18,317 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 226 selfloop transitions, 120 changer transitions 2/349 dead transitions. [2024-11-22 13:55:18,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 349 transitions, 5268 flow [2024-11-22 13:55:18,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-22 13:55:18,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-22 13:55:18,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 161 transitions. [2024-11-22 13:55:18,319 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4236842105263158 [2024-11-22 13:55:18,319 INFO L175 Difference]: Start difference. First operand has 149 places, 245 transitions, 3382 flow. Second operand 19 states and 161 transitions. [2024-11-22 13:55:18,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 349 transitions, 5268 flow [2024-11-22 13:55:18,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 349 transitions, 4729 flow, removed 241 selfloop flow, removed 5 redundant places. [2024-11-22 13:55:18,399 INFO L231 Difference]: Finished difference. Result has 171 places, 288 transitions, 4021 flow [2024-11-22 13:55:18,400 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2961, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4021, PETRI_PLACES=171, PETRI_TRANSITIONS=288} [2024-11-22 13:55:18,400 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 150 predicate places. [2024-11-22 13:55:18,400 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 288 transitions, 4021 flow [2024-11-22 13:55:18,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 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) [2024-11-22 13:55:18,401 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:18,401 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:18,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-22 13:55:18,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-22 13:55:18,605 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:18,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:18,605 INFO L85 PathProgramCache]: Analyzing trace with hash -345718318, now seen corresponding path program 6 times [2024-11-22 13:55:18,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:18,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820037342] [2024-11-22 13:55:18,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:55:18,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:18,618 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 13:55:18,618 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:18,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:18,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820037342] [2024-11-22 13:55:18,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820037342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:18,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944652927] [2024-11-22 13:55:18,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:55:18,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:18,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:18,731 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:55:18,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 13:55:18,796 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 13:55:18,797 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:18,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 13:55:18,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:18,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:18,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944652927] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:18,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:18,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-22 13:55:18,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648721051] [2024-11-22 13:55:18,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:18,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 13:55:18,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:18,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 13:55:18,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2024-11-22 13:55:18,902 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:18,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 288 transitions, 4021 flow. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 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) [2024-11-22 13:55:18,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:18,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:18,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:19,573 INFO L124 PetriNetUnfolderBase]: 985/1928 cut-off events. [2024-11-22 13:55:19,573 INFO L125 PetriNetUnfolderBase]: For 25185/25185 co-relation queries the response was YES. [2024-11-22 13:55:19,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13710 conditions, 1928 events. 985/1928 cut-off events. For 25185/25185 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 12040 event pairs, 49 based on Foata normal form. 15/1942 useless extension candidates. Maximal degree in co-relation 13633. Up to 699 conditions per place. [2024-11-22 13:55:19,590 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 206 selfloop transitions, 202 changer transitions 0/409 dead transitions. [2024-11-22 13:55:19,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 409 transitions, 6230 flow [2024-11-22 13:55:19,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-22 13:55:19,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-22 13:55:19,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 181 transitions. [2024-11-22 13:55:19,591 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-11-22 13:55:19,591 INFO L175 Difference]: Start difference. First operand has 171 places, 288 transitions, 4021 flow. Second operand 21 states and 181 transitions. [2024-11-22 13:55:19,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 409 transitions, 6230 flow [2024-11-22 13:55:19,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 409 transitions, 5993 flow, removed 92 selfloop flow, removed 9 redundant places. [2024-11-22 13:55:19,680 INFO L231 Difference]: Finished difference. Result has 190 places, 320 transitions, 4927 flow [2024-11-22 13:55:19,680 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3760, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4927, PETRI_PLACES=190, PETRI_TRANSITIONS=320} [2024-11-22 13:55:19,681 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 169 predicate places. [2024-11-22 13:55:19,681 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 320 transitions, 4927 flow [2024-11-22 13:55:19,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 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) [2024-11-22 13:55:19,681 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:19,681 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:19,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-22 13:55:19,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-22 13:55:19,885 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:19,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:19,886 INFO L85 PathProgramCache]: Analyzing trace with hash -262601428, now seen corresponding path program 7 times [2024-11-22 13:55:19,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:19,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543492990] [2024-11-22 13:55:19,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:55:19,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:55:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:19,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:19,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543492990] [2024-11-22 13:55:19,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543492990] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:19,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722078404] [2024-11-22 13:55:19,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:55:19,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:19,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:20,002 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:55:20,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 13:55:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:55:20,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 13:55:20,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:20,126 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:20,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722078404] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:20,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:20,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-22 13:55:20,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082605435] [2024-11-22 13:55:20,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:20,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 13:55:20,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:20,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 13:55:20,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-11-22 13:55:20,191 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:20,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 320 transitions, 4927 flow. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 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) [2024-11-22 13:55:20,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:20,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:20,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:20,839 INFO L124 PetriNetUnfolderBase]: 994/1920 cut-off events. [2024-11-22 13:55:20,839 INFO L125 PetriNetUnfolderBase]: For 31811/31811 co-relation queries the response was YES. [2024-11-22 13:55:20,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14707 conditions, 1920 events. 994/1920 cut-off events. For 31811/31811 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 11757 event pairs, 49 based on Foata normal form. 20/1939 useless extension candidates. Maximal degree in co-relation 14627. Up to 707 conditions per place. [2024-11-22 13:55:20,856 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 187 selfloop transitions, 197 changer transitions 0/385 dead transitions. [2024-11-22 13:55:20,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 385 transitions, 6443 flow [2024-11-22 13:55:20,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-22 13:55:20,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-22 13:55:20,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 140 transitions. [2024-11-22 13:55:20,857 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-22 13:55:20,857 INFO L175 Difference]: Start difference. First operand has 190 places, 320 transitions, 4927 flow. Second operand 15 states and 140 transitions. [2024-11-22 13:55:20,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 385 transitions, 6443 flow [2024-11-22 13:55:20,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 385 transitions, 6277 flow, removed 47 selfloop flow, removed 9 redundant places. [2024-11-22 13:55:20,963 INFO L231 Difference]: Finished difference. Result has 196 places, 321 transitions, 5305 flow [2024-11-22 13:55:20,963 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4644, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5305, PETRI_PLACES=196, PETRI_TRANSITIONS=321} [2024-11-22 13:55:20,964 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 175 predicate places. [2024-11-22 13:55:20,964 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 321 transitions, 5305 flow [2024-11-22 13:55:20,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 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) [2024-11-22 13:55:20,964 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:20,964 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:20,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-22 13:55:21,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-22 13:55:21,165 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:21,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:21,166 INFO L85 PathProgramCache]: Analyzing trace with hash 611139252, now seen corresponding path program 8 times [2024-11-22 13:55:21,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:21,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417496078] [2024-11-22 13:55:21,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:55:21,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:21,182 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:55:21,183 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:21,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:21,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417496078] [2024-11-22 13:55:21,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417496078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:21,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466188912] [2024-11-22 13:55:21,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:55:21,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:21,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:21,315 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:55:21,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 13:55:21,407 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:55:21,407 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:21,408 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 13:55:21,409 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:21,436 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:21,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466188912] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:21,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:21,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-22 13:55:21,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792620373] [2024-11-22 13:55:21,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:21,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 13:55:21,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:21,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 13:55:21,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-22 13:55:21,545 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:21,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 321 transitions, 5305 flow. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:55:21,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:21,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:21,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:22,107 INFO L124 PetriNetUnfolderBase]: 1002/1901 cut-off events. [2024-11-22 13:55:22,107 INFO L125 PetriNetUnfolderBase]: For 37633/37633 co-relation queries the response was YES. [2024-11-22 13:55:22,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15569 conditions, 1901 events. 1002/1901 cut-off events. For 37633/37633 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11347 event pairs, 230 based on Foata normal form. 24/1924 useless extension candidates. Maximal degree in co-relation 15489. Up to 1336 conditions per place. [2024-11-22 13:55:22,123 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 247 selfloop transitions, 120 changer transitions 2/370 dead transitions. [2024-11-22 13:55:22,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 370 transitions, 6621 flow [2024-11-22 13:55:22,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 13:55:22,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-22 13:55:22,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 129 transitions. [2024-11-22 13:55:22,127 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-11-22 13:55:22,127 INFO L175 Difference]: Start difference. First operand has 196 places, 321 transitions, 5305 flow. Second operand 14 states and 129 transitions. [2024-11-22 13:55:22,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 370 transitions, 6621 flow [2024-11-22 13:55:22,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 370 transitions, 6441 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-11-22 13:55:22,232 INFO L231 Difference]: Finished difference. Result has 201 places, 326 transitions, 5550 flow [2024-11-22 13:55:22,233 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5057, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5550, PETRI_PLACES=201, PETRI_TRANSITIONS=326} [2024-11-22 13:55:22,233 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 180 predicate places. [2024-11-22 13:55:22,233 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 326 transitions, 5550 flow [2024-11-22 13:55:22,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:55:22,233 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:22,233 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:22,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-22 13:55:22,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-22 13:55:22,438 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:22,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:22,438 INFO L85 PathProgramCache]: Analyzing trace with hash 774147057, now seen corresponding path program 1 times [2024-11-22 13:55:22,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:22,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35331259] [2024-11-22 13:55:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:55:22,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:55:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:22,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:22,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35331259] [2024-11-22 13:55:22,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35331259] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:22,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698082151] [2024-11-22 13:55:22,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 13:55:22,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:22,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:22,587 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:55:22,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 13:55:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:55:22,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 13:55:22,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:22,746 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:27,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698082151] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:27,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:27,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2024-11-22 13:55:27,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384740692] [2024-11-22 13:55:27,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:27,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 13:55:27,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:27,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 13:55:27,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2024-11-22 13:55:27,074 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:27,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 326 transitions, 5550 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 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) [2024-11-22 13:55:27,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:27,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:27,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:32,831 INFO L124 PetriNetUnfolderBase]: 928/1785 cut-off events. [2024-11-22 13:55:32,831 INFO L125 PetriNetUnfolderBase]: For 39794/39794 co-relation queries the response was YES. [2024-11-22 13:55:32,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14939 conditions, 1785 events. 928/1785 cut-off events. For 39794/39794 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10658 event pairs, 125 based on Foata normal form. 45/1829 useless extension candidates. Maximal degree in co-relation 14856. Up to 588 conditions per place. [2024-11-22 13:55:32,850 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 196 selfloop transitions, 162 changer transitions 9/368 dead transitions. [2024-11-22 13:55:32,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 368 transitions, 6905 flow [2024-11-22 13:55:32,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 13:55:32,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 13:55:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-11-22 13:55:32,856 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-11-22 13:55:32,856 INFO L175 Difference]: Start difference. First operand has 201 places, 326 transitions, 5550 flow. Second operand 9 states and 86 transitions. [2024-11-22 13:55:32,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 368 transitions, 6905 flow [2024-11-22 13:55:33,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 368 transitions, 6670 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-11-22 13:55:33,108 INFO L231 Difference]: Finished difference. Result has 205 places, 331 transitions, 6046 flow [2024-11-22 13:55:33,112 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5051, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6046, PETRI_PLACES=205, PETRI_TRANSITIONS=331} [2024-11-22 13:55:33,113 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 184 predicate places. [2024-11-22 13:55:33,113 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 331 transitions, 6046 flow [2024-11-22 13:55:33,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 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) [2024-11-22 13:55:33,113 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:33,113 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:33,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-22 13:55:33,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:33,316 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:33,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:33,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2101184528, now seen corresponding path program 6 times [2024-11-22 13:55:33,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:33,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268386306] [2024-11-22 13:55:33,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:55:33,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:33,351 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 13:55:33,353 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:33,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:33,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268386306] [2024-11-22 13:55:33,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268386306] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:33,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309136392] [2024-11-22 13:55:33,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:55:33,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:33,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:33,512 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:55:33,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 13:55:33,578 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 13:55:33,579 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:33,579 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 13:55:33,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:33,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:33,736 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:33,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309136392] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:33,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:33,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2024-11-22 13:55:33,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903723755] [2024-11-22 13:55:33,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:33,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 13:55:33,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:33,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 13:55:33,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-11-22 13:55:33,902 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:33,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 331 transitions, 6046 flow. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 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) [2024-11-22 13:55:33,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:33,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:33,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:34,500 INFO L124 PetriNetUnfolderBase]: 964/1857 cut-off events. [2024-11-22 13:55:34,500 INFO L125 PetriNetUnfolderBase]: For 46796/46796 co-relation queries the response was YES. [2024-11-22 13:55:34,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16440 conditions, 1857 events. 964/1857 cut-off events. For 46796/46796 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 11141 event pairs, 38 based on Foata normal form. 33/1889 useless extension candidates. Maximal degree in co-relation 16354. Up to 662 conditions per place. [2024-11-22 13:55:34,514 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 239 selfloop transitions, 167 changer transitions 6/413 dead transitions. [2024-11-22 13:55:34,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 413 transitions, 7962 flow [2024-11-22 13:55:34,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-22 13:55:34,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-22 13:55:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 172 transitions. [2024-11-22 13:55:34,518 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-11-22 13:55:34,518 INFO L175 Difference]: Start difference. First operand has 205 places, 331 transitions, 6046 flow. Second operand 18 states and 172 transitions. [2024-11-22 13:55:34,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 413 transitions, 7962 flow [2024-11-22 13:55:34,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 413 transitions, 7526 flow, removed 136 selfloop flow, removed 4 redundant places. [2024-11-22 13:55:34,661 INFO L231 Difference]: Finished difference. Result has 226 places, 358 transitions, 6880 flow [2024-11-22 13:55:34,661 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5574, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6880, PETRI_PLACES=226, PETRI_TRANSITIONS=358} [2024-11-22 13:55:34,661 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 205 predicate places. [2024-11-22 13:55:34,662 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 358 transitions, 6880 flow [2024-11-22 13:55:34,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 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) [2024-11-22 13:55:34,662 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:34,662 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:34,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-22 13:55:34,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:34,863 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:34,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:34,863 INFO L85 PathProgramCache]: Analyzing trace with hash 628067492, now seen corresponding path program 9 times [2024-11-22 13:55:34,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:34,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290306194] [2024-11-22 13:55:34,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:55:34,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:34,874 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 13:55:34,874 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:34,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:34,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290306194] [2024-11-22 13:55:34,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290306194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:34,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812072498] [2024-11-22 13:55:34,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:55:34,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:34,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:34,953 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:55:34,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-22 13:55:35,042 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 13:55:35,043 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:35,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 13:55:35,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:35,083 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:35,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812072498] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:35,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:35,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-22 13:55:35,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815500178] [2024-11-22 13:55:35,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:35,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 13:55:35,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:35,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 13:55:35,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-22 13:55:35,186 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:35,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 358 transitions, 6880 flow. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:55:35,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:35,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:35,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:35,924 INFO L124 PetriNetUnfolderBase]: 965/1857 cut-off events. [2024-11-22 13:55:35,924 INFO L125 PetriNetUnfolderBase]: For 48187/48187 co-relation queries the response was YES. [2024-11-22 13:55:35,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16709 conditions, 1857 events. 965/1857 cut-off events. For 48187/48187 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11141 event pairs, 124 based on Foata normal form. 12/1868 useless extension candidates. Maximal degree in co-relation 16613. Up to 662 conditions per place. [2024-11-22 13:55:35,939 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 222 selfloop transitions, 192 changer transitions 1/416 dead transitions. [2024-11-22 13:55:35,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 416 transitions, 8346 flow [2024-11-22 13:55:35,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-22 13:55:35,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-22 13:55:35,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 135 transitions. [2024-11-22 13:55:35,940 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39705882352941174 [2024-11-22 13:55:35,940 INFO L175 Difference]: Start difference. First operand has 226 places, 358 transitions, 6880 flow. Second operand 17 states and 135 transitions. [2024-11-22 13:55:35,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 416 transitions, 8346 flow [2024-11-22 13:55:36,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 416 transitions, 7749 flow, removed 214 selfloop flow, removed 12 redundant places. [2024-11-22 13:55:36,106 INFO L231 Difference]: Finished difference. Result has 234 places, 361 transitions, 6828 flow [2024-11-22 13:55:36,107 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6377, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6828, PETRI_PLACES=234, PETRI_TRANSITIONS=361} [2024-11-22 13:55:36,107 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 213 predicate places. [2024-11-22 13:55:36,107 INFO L471 AbstractCegarLoop]: Abstraction has has 234 places, 361 transitions, 6828 flow [2024-11-22 13:55:36,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:55:36,107 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:36,107 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:36,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-22 13:55:36,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:36,308 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:36,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:36,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1231302106, now seen corresponding path program 7 times [2024-11-22 13:55:36,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:36,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115939712] [2024-11-22 13:55:36,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:55:36,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:55:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:36,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:36,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115939712] [2024-11-22 13:55:36,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115939712] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:36,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640221315] [2024-11-22 13:55:36,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:55:36,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:36,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:36,432 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:55:36,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-22 13:55:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:55:36,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 13:55:36,493 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:36,535 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:36,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640221315] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:36,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:36,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-11-22 13:55:36,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338592521] [2024-11-22 13:55:36,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:36,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 13:55:36,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:36,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 13:55:36,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2024-11-22 13:55:36,663 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:36,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 361 transitions, 6828 flow. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:55:36,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:36,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:36,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:37,210 INFO L124 PetriNetUnfolderBase]: 962/1848 cut-off events. [2024-11-22 13:55:37,210 INFO L125 PetriNetUnfolderBase]: For 30958/30958 co-relation queries the response was YES. [2024-11-22 13:55:37,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15346 conditions, 1848 events. 962/1848 cut-off events. For 30958/30958 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 11057 event pairs, 62 based on Foata normal form. 4/1851 useless extension candidates. Maximal degree in co-relation 15252. Up to 662 conditions per place. [2024-11-22 13:55:37,224 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 262 selfloop transitions, 145 changer transitions 2/410 dead transitions. [2024-11-22 13:55:37,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 410 transitions, 8150 flow [2024-11-22 13:55:37,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 13:55:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-22 13:55:37,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 140 transitions. [2024-11-22 13:55:37,226 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-11-22 13:55:37,226 INFO L175 Difference]: Start difference. First operand has 234 places, 361 transitions, 6828 flow. Second operand 16 states and 140 transitions. [2024-11-22 13:55:37,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 410 transitions, 8150 flow [2024-11-22 13:55:37,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 410 transitions, 7682 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-11-22 13:55:37,343 INFO L231 Difference]: Finished difference. Result has 241 places, 364 transitions, 6814 flow [2024-11-22 13:55:37,343 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6350, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6814, PETRI_PLACES=241, PETRI_TRANSITIONS=364} [2024-11-22 13:55:37,343 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 220 predicate places. [2024-11-22 13:55:37,343 INFO L471 AbstractCegarLoop]: Abstraction has has 241 places, 364 transitions, 6814 flow [2024-11-22 13:55:37,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:55:37,344 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:37,344 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:37,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-22 13:55:37,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:37,544 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:37,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:37,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1117572066, now seen corresponding path program 8 times [2024-11-22 13:55:37,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:37,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284223006] [2024-11-22 13:55:37,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:55:37,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:37,554 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:55:37,554 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:37,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:37,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284223006] [2024-11-22 13:55:37,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284223006] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:37,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698407759] [2024-11-22 13:55:37,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:55:37,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:37,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:37,653 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:55:37,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-22 13:55:37,727 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:55:37,728 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:37,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 13:55:37,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:37,761 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:37,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698407759] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:37,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:37,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-22 13:55:37,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601457397] [2024-11-22 13:55:37,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:37,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 13:55:37,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:37,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 13:55:37,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-11-22 13:55:37,879 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:37,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 364 transitions, 6814 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 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) [2024-11-22 13:55:37,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:37,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:37,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:38,620 INFO L124 PetriNetUnfolderBase]: 1057/2061 cut-off events. [2024-11-22 13:55:38,620 INFO L125 PetriNetUnfolderBase]: For 37175/37175 co-relation queries the response was YES. [2024-11-22 13:55:38,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17032 conditions, 2061 events. 1057/2061 cut-off events. For 37175/37175 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 12953 event pairs, 147 based on Foata normal form. 20/2080 useless extension candidates. Maximal degree in co-relation 16936. Up to 857 conditions per place. [2024-11-22 13:55:38,637 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 272 selfloop transitions, 179 changer transitions 3/455 dead transitions. [2024-11-22 13:55:38,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 455 transitions, 9111 flow [2024-11-22 13:55:38,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 13:55:38,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-22 13:55:38,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 152 transitions. [2024-11-22 13:55:38,638 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-11-22 13:55:38,638 INFO L175 Difference]: Start difference. First operand has 241 places, 364 transitions, 6814 flow. Second operand 16 states and 152 transitions. [2024-11-22 13:55:38,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 455 transitions, 9111 flow [2024-11-22 13:55:38,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 455 transitions, 8832 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-11-22 13:55:38,779 INFO L231 Difference]: Finished difference. Result has 256 places, 394 transitions, 7914 flow [2024-11-22 13:55:38,780 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6544, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7914, PETRI_PLACES=256, PETRI_TRANSITIONS=394} [2024-11-22 13:55:38,780 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 235 predicate places. [2024-11-22 13:55:38,780 INFO L471 AbstractCegarLoop]: Abstraction has has 256 places, 394 transitions, 7914 flow [2024-11-22 13:55:38,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 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) [2024-11-22 13:55:38,780 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:38,780 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:38,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-22 13:55:38,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:38,981 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:38,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:38,982 INFO L85 PathProgramCache]: Analyzing trace with hash 258102890, now seen corresponding path program 9 times [2024-11-22 13:55:38,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:38,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927119847] [2024-11-22 13:55:38,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:55:38,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:38,992 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 13:55:38,992 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:39,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:39,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:39,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927119847] [2024-11-22 13:55:39,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927119847] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:39,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671002091] [2024-11-22 13:55:39,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:55:39,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:39,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:39,130 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:55:39,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-22 13:55:39,250 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 13:55:39,251 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:39,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 13:55:39,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:39,282 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:39,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671002091] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:39,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:39,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-22 13:55:39,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391180146] [2024-11-22 13:55:39,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:39,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 13:55:39,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:39,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 13:55:39,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-22 13:55:39,422 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:39,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 394 transitions, 7914 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 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) [2024-11-22 13:55:39,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:39,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:39,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:40,295 INFO L124 PetriNetUnfolderBase]: 1081/2129 cut-off events. [2024-11-22 13:55:40,296 INFO L125 PetriNetUnfolderBase]: For 41672/41672 co-relation queries the response was YES. [2024-11-22 13:55:40,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18377 conditions, 2129 events. 1081/2129 cut-off events. For 41672/41672 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13565 event pairs, 152 based on Foata normal form. 4/2132 useless extension candidates. Maximal degree in co-relation 18275. Up to 727 conditions per place. [2024-11-22 13:55:40,313 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 307 selfloop transitions, 147 changer transitions 2/457 dead transitions. [2024-11-22 13:55:40,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 457 transitions, 9635 flow [2024-11-22 13:55:40,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-22 13:55:40,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-22 13:55:40,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 144 transitions. [2024-11-22 13:55:40,314 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4235294117647059 [2024-11-22 13:55:40,314 INFO L175 Difference]: Start difference. First operand has 256 places, 394 transitions, 7914 flow. Second operand 17 states and 144 transitions. [2024-11-22 13:55:40,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 457 transitions, 9635 flow [2024-11-22 13:55:40,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 457 transitions, 9428 flow, removed 66 selfloop flow, removed 8 redundant places. [2024-11-22 13:55:40,481 INFO L231 Difference]: Finished difference. Result has 267 places, 398 transitions, 8159 flow [2024-11-22 13:55:40,481 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7691, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8159, PETRI_PLACES=267, PETRI_TRANSITIONS=398} [2024-11-22 13:55:40,481 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 246 predicate places. [2024-11-22 13:55:40,482 INFO L471 AbstractCegarLoop]: Abstraction has has 267 places, 398 transitions, 8159 flow [2024-11-22 13:55:40,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 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) [2024-11-22 13:55:40,482 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:40,482 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:40,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-22 13:55:40,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:40,686 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:40,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:40,687 INFO L85 PathProgramCache]: Analyzing trace with hash -649237018, now seen corresponding path program 10 times [2024-11-22 13:55:40,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:40,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942777126] [2024-11-22 13:55:40,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:55:40,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:40,698 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:55:40,698 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:40,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:40,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942777126] [2024-11-22 13:55:40,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942777126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:40,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116553131] [2024-11-22 13:55:40,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:55:40,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:40,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:40,779 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:55:40,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-22 13:55:40,850 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:55:40,850 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:40,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 13:55:40,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:40,873 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:40,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116553131] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:40,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:40,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-22 13:55:40,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299765688] [2024-11-22 13:55:40,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:40,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 13:55:40,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:40,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 13:55:40,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-22 13:55:40,918 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:40,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 398 transitions, 8159 flow. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:55:40,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:40,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:40,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:41,415 INFO L124 PetriNetUnfolderBase]: 1070/2124 cut-off events. [2024-11-22 13:55:41,415 INFO L125 PetriNetUnfolderBase]: For 43695/43695 co-relation queries the response was YES. [2024-11-22 13:55:41,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18602 conditions, 2124 events. 1070/2124 cut-off events. For 43695/43695 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13685 event pairs, 207 based on Foata normal form. 12/2135 useless extension candidates. Maximal degree in co-relation 18498. Up to 1007 conditions per place. [2024-11-22 13:55:41,432 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 324 selfloop transitions, 93 changer transitions 11/429 dead transitions. [2024-11-22 13:55:41,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 429 transitions, 9407 flow [2024-11-22 13:55:41,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 13:55:41,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 13:55:41,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 80 transitions. [2024-11-22 13:55:41,433 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-22 13:55:41,433 INFO L175 Difference]: Start difference. First operand has 267 places, 398 transitions, 8159 flow. Second operand 10 states and 80 transitions. [2024-11-22 13:55:41,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 429 transitions, 9407 flow [2024-11-22 13:55:41,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 429 transitions, 8993 flow, removed 42 selfloop flow, removed 12 redundant places. [2024-11-22 13:55:41,596 INFO L231 Difference]: Finished difference. Result has 265 places, 392 transitions, 7868 flow [2024-11-22 13:55:41,596 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7673, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7868, PETRI_PLACES=265, PETRI_TRANSITIONS=392} [2024-11-22 13:55:41,597 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 244 predicate places. [2024-11-22 13:55:41,597 INFO L471 AbstractCegarLoop]: Abstraction has has 265 places, 392 transitions, 7868 flow [2024-11-22 13:55:41,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 13:55:41,597 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:41,597 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:41,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-22 13:55:41,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-22 13:55:41,798 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:41,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:41,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1576779404, now seen corresponding path program 11 times [2024-11-22 13:55:41,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:41,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732693791] [2024-11-22 13:55:41,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:55:41,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:41,807 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:55:41,807 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:41,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:41,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732693791] [2024-11-22 13:55:41,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732693791] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:41,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379328522] [2024-11-22 13:55:41,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:55:41,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:41,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:41,914 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:55:41,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-22 13:55:41,987 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:55:41,987 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:41,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-22 13:55:41,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:42,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:42,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379328522] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:42,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:42,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2024-11-22 13:55:42,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321561024] [2024-11-22 13:55:42,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:42,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 13:55:42,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:42,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 13:55:42,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-22 13:55:42,123 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:42,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 392 transitions, 7868 flow. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 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) [2024-11-22 13:55:42,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:42,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:42,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:42,786 INFO L124 PetriNetUnfolderBase]: 1098/2130 cut-off events. [2024-11-22 13:55:42,786 INFO L125 PetriNetUnfolderBase]: For 45039/45039 co-relation queries the response was YES. [2024-11-22 13:55:42,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18864 conditions, 2130 events. 1098/2130 cut-off events. For 45039/45039 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 13382 event pairs, 349 based on Foata normal form. 20/2149 useless extension candidates. Maximal degree in co-relation 18761. Up to 1847 conditions per place. [2024-11-22 13:55:42,804 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 345 selfloop transitions, 100 changer transitions 0/446 dead transitions. [2024-11-22 13:55:42,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 446 transitions, 9540 flow [2024-11-22 13:55:42,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-22 13:55:42,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-22 13:55:42,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 144 transitions. [2024-11-22 13:55:42,805 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4235294117647059 [2024-11-22 13:55:42,805 INFO L175 Difference]: Start difference. First operand has 265 places, 392 transitions, 7868 flow. Second operand 17 states and 144 transitions. [2024-11-22 13:55:42,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 446 transitions, 9540 flow [2024-11-22 13:55:42,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 446 transitions, 9387 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-11-22 13:55:42,966 INFO L231 Difference]: Finished difference. Result has 273 places, 412 transitions, 8519 flow [2024-11-22 13:55:42,966 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7629, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8519, PETRI_PLACES=273, PETRI_TRANSITIONS=412} [2024-11-22 13:55:42,967 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 252 predicate places. [2024-11-22 13:55:42,967 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 412 transitions, 8519 flow [2024-11-22 13:55:42,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 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) [2024-11-22 13:55:42,967 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:42,967 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:42,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-22 13:55:43,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-22 13:55:43,168 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:43,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:43,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1744391788, now seen corresponding path program 10 times [2024-11-22 13:55:43,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:43,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359869384] [2024-11-22 13:55:43,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:55:43,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:43,191 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:55:43,191 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:43,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:43,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359869384] [2024-11-22 13:55:43,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359869384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:43,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258713830] [2024-11-22 13:55:43,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:55:43,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:43,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:43,313 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:55:43,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-22 13:55:43,378 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:55:43,378 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:43,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-22 13:55:43,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:43,466 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:43,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258713830] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:43,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:43,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-22 13:55:43,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598715054] [2024-11-22 13:55:43,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:43,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 13:55:43,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:43,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 13:55:43,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-11-22 13:55:43,594 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:43,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 412 transitions, 8519 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 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) [2024-11-22 13:55:43,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:43,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:43,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:44,364 INFO L124 PetriNetUnfolderBase]: 1105/2152 cut-off events. [2024-11-22 13:55:44,364 INFO L125 PetriNetUnfolderBase]: For 44256/44256 co-relation queries the response was YES. [2024-11-22 13:55:44,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19189 conditions, 2152 events. 1105/2152 cut-off events. For 44256/44256 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13653 event pairs, 157 based on Foata normal form. 18/2169 useless extension candidates. Maximal degree in co-relation 19085. Up to 860 conditions per place. [2024-11-22 13:55:44,380 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 272 selfloop transitions, 190 changer transitions 0/463 dead transitions. [2024-11-22 13:55:44,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 463 transitions, 10055 flow [2024-11-22 13:55:44,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-22 13:55:44,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-22 13:55:44,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 133 transitions. [2024-11-22 13:55:44,382 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3911764705882353 [2024-11-22 13:55:44,382 INFO L175 Difference]: Start difference. First operand has 273 places, 412 transitions, 8519 flow. Second operand 17 states and 133 transitions. [2024-11-22 13:55:44,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 463 transitions, 10055 flow [2024-11-22 13:55:44,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 463 transitions, 9643 flow, removed 165 selfloop flow, removed 9 redundant places. [2024-11-22 13:55:44,538 INFO L231 Difference]: Finished difference. Result has 282 places, 417 transitions, 8618 flow [2024-11-22 13:55:44,539 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=8123, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8618, PETRI_PLACES=282, PETRI_TRANSITIONS=417} [2024-11-22 13:55:44,539 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 261 predicate places. [2024-11-22 13:55:44,539 INFO L471 AbstractCegarLoop]: Abstraction has has 282 places, 417 transitions, 8618 flow [2024-11-22 13:55:44,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 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) [2024-11-22 13:55:44,539 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:44,539 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:44,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-22 13:55:44,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-22 13:55:44,740 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:44,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:44,741 INFO L85 PathProgramCache]: Analyzing trace with hash 795958468, now seen corresponding path program 12 times [2024-11-22 13:55:44,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:44,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029676900] [2024-11-22 13:55:44,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:55:44,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:44,749 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 13:55:44,750 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:44,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:44,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029676900] [2024-11-22 13:55:44,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029676900] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:44,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091442444] [2024-11-22 13:55:44,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:55:44,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:44,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:44,879 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:55:44,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-22 13:55:45,046 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 13:55:45,046 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:45,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 13:55:45,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:45,070 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:45,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091442444] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:45,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:45,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-22 13:55:45,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135984635] [2024-11-22 13:55:45,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:45,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 13:55:45,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:45,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 13:55:45,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-11-22 13:55:45,132 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:45,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 417 transitions, 8618 flow. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 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) [2024-11-22 13:55:45,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:45,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:45,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:45,829 INFO L124 PetriNetUnfolderBase]: 1132/2228 cut-off events. [2024-11-22 13:55:45,829 INFO L125 PetriNetUnfolderBase]: For 43875/43875 co-relation queries the response was YES. [2024-11-22 13:55:45,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19667 conditions, 2228 events. 1132/2228 cut-off events. For 43875/43875 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 14333 event pairs, 219 based on Foata normal form. 2/2229 useless extension candidates. Maximal degree in co-relation 19564. Up to 1088 conditions per place. [2024-11-22 13:55:45,847 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 352 selfloop transitions, 102 changer transitions 2/457 dead transitions. [2024-11-22 13:55:45,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 457 transitions, 9953 flow [2024-11-22 13:55:45,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 13:55:45,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-22 13:55:45,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 122 transitions. [2024-11-22 13:55:45,847 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-11-22 13:55:45,847 INFO L175 Difference]: Start difference. First operand has 282 places, 417 transitions, 8618 flow. Second operand 16 states and 122 transitions. [2024-11-22 13:55:45,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 457 transitions, 9953 flow [2024-11-22 13:55:45,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 457 transitions, 9819 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-11-22 13:55:46,009 INFO L231 Difference]: Finished difference. Result has 289 places, 414 transitions, 8625 flow [2024-11-22 13:55:46,010 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=8443, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8625, PETRI_PLACES=289, PETRI_TRANSITIONS=414} [2024-11-22 13:55:46,010 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 268 predicate places. [2024-11-22 13:55:46,011 INFO L471 AbstractCegarLoop]: Abstraction has has 289 places, 414 transitions, 8625 flow [2024-11-22 13:55:46,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 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) [2024-11-22 13:55:46,011 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:46,011 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:46,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-22 13:55:46,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:46,212 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:46,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:46,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2120813537, now seen corresponding path program 13 times [2024-11-22 13:55:46,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:46,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767078239] [2024-11-22 13:55:46,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:55:46,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:55:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:46,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:46,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767078239] [2024-11-22 13:55:46,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767078239] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:46,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932678927] [2024-11-22 13:55:46,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:55:46,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:46,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:46,437 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:55:46,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-22 13:55:46,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:55:46,506 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-22 13:55:46,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:46,893 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-22 13:55:46,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 40 [2024-11-22 13:55:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:55:46,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:47,284 INFO L349 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2024-11-22 13:55:47,285 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 119 [2024-11-22 13:55:47,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:55:47,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932678927] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:47,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:47,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2024-11-22 13:55:47,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279232873] [2024-11-22 13:55:47,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:47,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-22 13:55:47,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:47,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-22 13:55:47,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2024-11-22 13:55:47,747 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:47,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 414 transitions, 8625 flow. Second operand has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 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) [2024-11-22 13:55:47,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:47,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:47,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:51,010 INFO L124 PetriNetUnfolderBase]: 2478/4537 cut-off events. [2024-11-22 13:55:51,010 INFO L125 PetriNetUnfolderBase]: For 102355/102355 co-relation queries the response was YES. [2024-11-22 13:55:51,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43858 conditions, 4537 events. 2478/4537 cut-off events. For 102355/102355 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 31088 event pairs, 63 based on Foata normal form. 35/4570 useless extension candidates. Maximal degree in co-relation 43754. Up to 1301 conditions per place. [2024-11-22 13:55:51,052 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 578 selfloop transitions, 466 changer transitions 23/1068 dead transitions. [2024-11-22 13:55:51,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1068 transitions, 24083 flow [2024-11-22 13:55:51,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-22 13:55:51,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-11-22 13:55:51,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 488 transitions. [2024-11-22 13:55:51,054 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-11-22 13:55:51,054 INFO L175 Difference]: Start difference. First operand has 289 places, 414 transitions, 8625 flow. Second operand 56 states and 488 transitions. [2024-11-22 13:55:51,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1068 transitions, 24083 flow [2024-11-22 13:55:51,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 1068 transitions, 23399 flow, removed 56 selfloop flow, removed 11 redundant places. [2024-11-22 13:55:51,510 INFO L231 Difference]: Finished difference. Result has 363 places, 792 transitions, 19198 flow [2024-11-22 13:55:51,511 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=8402, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=19198, PETRI_PLACES=363, PETRI_TRANSITIONS=792} [2024-11-22 13:55:51,511 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 342 predicate places. [2024-11-22 13:55:51,511 INFO L471 AbstractCegarLoop]: Abstraction has has 363 places, 792 transitions, 19198 flow [2024-11-22 13:55:51,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.892857142857143) internal successors, (137), 28 states have internal predecessors, (137), 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) [2024-11-22 13:55:51,512 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:51,512 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:51,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-22 13:55:51,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-22 13:55:51,716 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:51,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:51,717 INFO L85 PathProgramCache]: Analyzing trace with hash 869160656, now seen corresponding path program 2 times [2024-11-22 13:55:51,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:51,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799816516] [2024-11-22 13:55:51,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:55:51,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:51,742 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:55:51,742 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:55:52,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:52,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799816516] [2024-11-22 13:55:52,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799816516] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:52,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010289342] [2024-11-22 13:55:52,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:55:52,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:52,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:52,476 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:55:52,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-22 13:55:52,539 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:55:52,540 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:52,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-22 13:55:52,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:52,767 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:55:52,767 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 27 treesize of output 20 [2024-11-22 13:55:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:55:52,771 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:53,036 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-22 13:55:53,037 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-22 13:55:53,085 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-11-22 13:55:53,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-11-22 13:55:53,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:53,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010289342] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:53,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:53,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-11-22 13:55:53,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613295587] [2024-11-22 13:55:53,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:53,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-22 13:55:53,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:53,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-22 13:55:53,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2024-11-22 13:55:53,124 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:53,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 792 transitions, 19198 flow. Second operand has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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) [2024-11-22 13:55:53,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:53,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:53,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:55,011 INFO L124 PetriNetUnfolderBase]: 2486/4535 cut-off events. [2024-11-22 13:55:55,012 INFO L125 PetriNetUnfolderBase]: For 129037/129037 co-relation queries the response was YES. [2024-11-22 13:55:55,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49028 conditions, 4535 events. 2486/4535 cut-off events. For 129037/129037 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 30975 event pairs, 141 based on Foata normal form. 8/4541 useless extension candidates. Maximal degree in co-relation 48839. Up to 3809 conditions per place. [2024-11-22 13:55:55,059 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 674 selfloop transitions, 187 changer transitions 15/877 dead transitions. [2024-11-22 13:55:55,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 877 transitions, 22118 flow [2024-11-22 13:55:55,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-22 13:55:55,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-22 13:55:55,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 190 transitions. [2024-11-22 13:55:55,060 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-11-22 13:55:55,060 INFO L175 Difference]: Start difference. First operand has 363 places, 792 transitions, 19198 flow. Second operand 22 states and 190 transitions. [2024-11-22 13:55:55,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 877 transitions, 22118 flow [2024-11-22 13:55:55,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 877 transitions, 20310 flow, removed 809 selfloop flow, removed 10 redundant places. [2024-11-22 13:55:55,794 INFO L231 Difference]: Finished difference. Result has 378 places, 809 transitions, 18455 flow [2024-11-22 13:55:55,795 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=17456, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=18455, PETRI_PLACES=378, PETRI_TRANSITIONS=809} [2024-11-22 13:55:55,795 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 357 predicate places. [2024-11-22 13:55:55,795 INFO L471 AbstractCegarLoop]: Abstraction has has 378 places, 809 transitions, 18455 flow [2024-11-22 13:55:55,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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) [2024-11-22 13:55:55,795 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:55:55,795 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:55:55,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-22 13:55:55,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-22 13:55:55,996 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:55:55,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:55:55,996 INFO L85 PathProgramCache]: Analyzing trace with hash -940336466, now seen corresponding path program 3 times [2024-11-22 13:55:55,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:55:55,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083977469] [2024-11-22 13:55:55,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:55:55,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:55:56,019 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 13:55:56,019 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:56,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:55:56,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:55:56,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083977469] [2024-11-22 13:55:56,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083977469] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:55:56,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942516293] [2024-11-22 13:55:56,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:55:56,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:55:56,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:55:56,781 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:55:56,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-22 13:55:56,853 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 13:55:56,853 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:55:56,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-22 13:55:56,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:55:57,061 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:55:57,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 71 [2024-11-22 13:55:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:55:57,176 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:55:57,455 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-22 13:55:57,455 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-22 13:55:57,514 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-11-22 13:55:57,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-11-22 13:55:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:55:57,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942516293] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:55:57,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:55:57,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-11-22 13:55:57,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418760962] [2024-11-22 13:55:57,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:55:57,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-22 13:55:57,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:55:57,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-22 13:55:57,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2024-11-22 13:55:57,558 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:55:57,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 809 transitions, 18455 flow. Second operand has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 states have internal predecessors, (131), 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) [2024-11-22 13:55:57,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:55:57,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:55:57,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:55:59,510 INFO L124 PetriNetUnfolderBase]: 2482/4525 cut-off events. [2024-11-22 13:55:59,511 INFO L125 PetriNetUnfolderBase]: For 122846/122846 co-relation queries the response was YES. [2024-11-22 13:55:59,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46782 conditions, 4525 events. 2482/4525 cut-off events. For 122846/122846 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 30801 event pairs, 153 based on Foata normal form. 1/4526 useless extension candidates. Maximal degree in co-relation 46589. Up to 4020 conditions per place. [2024-11-22 13:55:59,561 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 728 selfloop transitions, 137 changer transitions 8/874 dead transitions. [2024-11-22 13:55:59,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 874 transitions, 20954 flow [2024-11-22 13:55:59,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-22 13:55:59,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-22 13:55:59,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 177 transitions. [2024-11-22 13:55:59,563 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-11-22 13:55:59,563 INFO L175 Difference]: Start difference. First operand has 378 places, 809 transitions, 18455 flow. Second operand 21 states and 177 transitions. [2024-11-22 13:55:59,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 874 transitions, 20954 flow [2024-11-22 13:56:00,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 874 transitions, 20591 flow, removed 150 selfloop flow, removed 8 redundant places. [2024-11-22 13:56:00,337 INFO L231 Difference]: Finished difference. Result has 393 places, 823 transitions, 18816 flow [2024-11-22 13:56:00,338 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=18128, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=18816, PETRI_PLACES=393, PETRI_TRANSITIONS=823} [2024-11-22 13:56:00,338 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 372 predicate places. [2024-11-22 13:56:00,338 INFO L471 AbstractCegarLoop]: Abstraction has has 393 places, 823 transitions, 18816 flow [2024-11-22 13:56:00,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 states have internal predecessors, (131), 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) [2024-11-22 13:56:00,339 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:00,339 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:56:00,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-22 13:56:00,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:56:00,544 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:00,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:00,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1018984706, now seen corresponding path program 4 times [2024-11-22 13:56:00,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:00,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552352902] [2024-11-22 13:56:00,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:56:00,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:00,561 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:56:00,561 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:56:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:56:01,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:56:01,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552352902] [2024-11-22 13:56:01,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552352902] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:56:01,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405165915] [2024-11-22 13:56:01,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:56:01,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:56:01,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:56:01,298 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:56:01,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-22 13:56:01,358 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:56:01,358 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:56:01,359 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-22 13:56:01,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:56:01,528 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:56:01,528 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 31 treesize of output 22 [2024-11-22 13:56:01,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:56:01,532 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:56:01,827 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-22 13:56:01,827 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-22 13:56:01,888 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-11-22 13:56:01,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-11-22 13:56:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:56:01,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405165915] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:56:01,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:56:01,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 25 [2024-11-22 13:56:01,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345508441] [2024-11-22 13:56:01,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:56:01,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-22 13:56:01,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:56:01,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-22 13:56:01,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2024-11-22 13:56:01,931 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:56:01,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 823 transitions, 18816 flow. Second operand has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 states have internal predecessors, (126), 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) [2024-11-22 13:56:01,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:56:01,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:56:01,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:56:04,060 INFO L124 PetriNetUnfolderBase]: 2505/4566 cut-off events. [2024-11-22 13:56:04,060 INFO L125 PetriNetUnfolderBase]: For 126711/126711 co-relation queries the response was YES. [2024-11-22 13:56:04,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47250 conditions, 4566 events. 2505/4566 cut-off events. For 126711/126711 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 31041 event pairs, 160 based on Foata normal form. 4/4570 useless extension candidates. Maximal degree in co-relation 47054. Up to 4037 conditions per place. [2024-11-22 13:56:04,111 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 747 selfloop transitions, 152 changer transitions 13/913 dead transitions. [2024-11-22 13:56:04,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 913 transitions, 21643 flow [2024-11-22 13:56:04,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-22 13:56:04,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-22 13:56:04,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 231 transitions. [2024-11-22 13:56:04,112 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4442307692307692 [2024-11-22 13:56:04,112 INFO L175 Difference]: Start difference. First operand has 393 places, 823 transitions, 18816 flow. Second operand 26 states and 231 transitions. [2024-11-22 13:56:04,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 913 transitions, 21643 flow [2024-11-22 13:56:04,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 913 transitions, 21362 flow, removed 73 selfloop flow, removed 11 redundant places. [2024-11-22 13:56:04,873 INFO L231 Difference]: Finished difference. Result has 410 places, 834 transitions, 19227 flow [2024-11-22 13:56:04,874 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=18564, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=823, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=19227, PETRI_PLACES=410, PETRI_TRANSITIONS=834} [2024-11-22 13:56:04,874 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 389 predicate places. [2024-11-22 13:56:04,874 INFO L471 AbstractCegarLoop]: Abstraction has has 410 places, 834 transitions, 19227 flow [2024-11-22 13:56:04,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.846153846153846) internal successors, (126), 26 states have internal predecessors, (126), 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) [2024-11-22 13:56:04,875 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:04,875 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:56:04,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-22 13:56:05,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:56:05,076 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:05,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:05,076 INFO L85 PathProgramCache]: Analyzing trace with hash 549068530, now seen corresponding path program 5 times [2024-11-22 13:56:05,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:05,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688037495] [2024-11-22 13:56:05,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:56:05,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:05,093 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-22 13:56:05,093 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:56:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:56:05,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:56:05,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688037495] [2024-11-22 13:56:05,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688037495] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:56:05,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919221746] [2024-11-22 13:56:05,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 13:56:05,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:56:05,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:56:05,311 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:56:05,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-22 13:56:05,379 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-22 13:56:05,380 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:56:05,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-22 13:56:05,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:56:05,539 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:56:05,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 75 [2024-11-22 13:56:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:56:05,666 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:56:05,946 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:56:05,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 152 [2024-11-22 13:56:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:56:06,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919221746] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:56:06,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:56:06,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 22 [2024-11-22 13:56:06,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011448439] [2024-11-22 13:56:06,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:56:06,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-22 13:56:06,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:56:06,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-22 13:56:06,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2024-11-22 13:56:06,236 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:56:06,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 834 transitions, 19227 flow. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 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) [2024-11-22 13:56:06,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:56:06,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:56:06,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:56:08,075 INFO L124 PetriNetUnfolderBase]: 2550/4650 cut-off events. [2024-11-22 13:56:08,076 INFO L125 PetriNetUnfolderBase]: For 133703/133703 co-relation queries the response was YES. [2024-11-22 13:56:08,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48594 conditions, 4650 events. 2550/4650 cut-off events. For 133703/133703 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 31719 event pairs, 148 based on Foata normal form. 3/4653 useless extension candidates. Maximal degree in co-relation 48395. Up to 4038 conditions per place. [2024-11-22 13:56:08,128 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 745 selfloop transitions, 163 changer transitions 10/919 dead transitions. [2024-11-22 13:56:08,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 919 transitions, 22443 flow [2024-11-22 13:56:08,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-22 13:56:08,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-22 13:56:08,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 183 transitions. [2024-11-22 13:56:08,129 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-11-22 13:56:08,129 INFO L175 Difference]: Start difference. First operand has 410 places, 834 transitions, 19227 flow. Second operand 21 states and 183 transitions. [2024-11-22 13:56:08,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 919 transitions, 22443 flow [2024-11-22 13:56:08,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 919 transitions, 22028 flow, removed 71 selfloop flow, removed 22 redundant places. [2024-11-22 13:56:08,948 INFO L231 Difference]: Finished difference. Result has 416 places, 863 transitions, 20150 flow [2024-11-22 13:56:08,948 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=18822, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=677, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=20150, PETRI_PLACES=416, PETRI_TRANSITIONS=863} [2024-11-22 13:56:08,949 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 395 predicate places. [2024-11-22 13:56:08,949 INFO L471 AbstractCegarLoop]: Abstraction has has 416 places, 863 transitions, 20150 flow [2024-11-22 13:56:08,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 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) [2024-11-22 13:56:08,949 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:08,949 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:56:08,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-22 13:56:09,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:56:09,154 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:09,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:09,154 INFO L85 PathProgramCache]: Analyzing trace with hash -2039447980, now seen corresponding path program 6 times [2024-11-22 13:56:09,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:09,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4881247] [2024-11-22 13:56:09,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:56:09,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:09,166 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 13:56:09,166 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:56:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:56:09,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:56:09,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4881247] [2024-11-22 13:56:09,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4881247] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:56:09,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464685489] [2024-11-22 13:56:09,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 13:56:09,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:56:09,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:56:09,422 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:56:09,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-22 13:56:09,488 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 13:56:09,488 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:56:09,489 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-22 13:56:09,490 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:56:09,702 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:56:09,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 60 [2024-11-22 13:56:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:56:09,811 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:56:10,095 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-22 13:56:10,096 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-22 13:56:10,162 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-11-22 13:56:10,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-11-22 13:56:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:56:10,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464685489] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:56:10,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:56:10,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 8] total 22 [2024-11-22 13:56:10,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897398827] [2024-11-22 13:56:10,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:56:10,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-22 13:56:10,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:56:10,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-22 13:56:10,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2024-11-22 13:56:10,202 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:56:10,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 863 transitions, 20150 flow. Second operand has 23 states, 23 states have (on average 4.695652173913044) internal successors, (108), 23 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) [2024-11-22 13:56:10,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:56:10,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:56:10,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:56:12,735 INFO L124 PetriNetUnfolderBase]: 2575/4688 cut-off events. [2024-11-22 13:56:12,735 INFO L125 PetriNetUnfolderBase]: For 146642/146642 co-relation queries the response was YES. [2024-11-22 13:56:12,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49793 conditions, 4688 events. 2575/4688 cut-off events. For 146642/146642 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32105 event pairs, 184 based on Foata normal form. 2/4690 useless extension candidates. Maximal degree in co-relation 49588. Up to 4309 conditions per place. [2024-11-22 13:56:12,784 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 803 selfloop transitions, 106 changer transitions 7/917 dead transitions. [2024-11-22 13:56:12,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 917 transitions, 22858 flow [2024-11-22 13:56:12,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 13:56:12,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-22 13:56:12,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 124 transitions. [2024-11-22 13:56:12,785 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-11-22 13:56:12,786 INFO L175 Difference]: Start difference. First operand has 416 places, 863 transitions, 20150 flow. Second operand 16 states and 124 transitions. [2024-11-22 13:56:12,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 917 transitions, 22858 flow [2024-11-22 13:56:13,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 917 transitions, 22254 flow, removed 198 selfloop flow, removed 13 redundant places. [2024-11-22 13:56:13,617 INFO L231 Difference]: Finished difference. Result has 421 places, 891 transitions, 20546 flow [2024-11-22 13:56:13,617 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=19546, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=767, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=20546, PETRI_PLACES=421, PETRI_TRANSITIONS=891} [2024-11-22 13:56:13,618 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 400 predicate places. [2024-11-22 13:56:13,618 INFO L471 AbstractCegarLoop]: Abstraction has has 421 places, 891 transitions, 20546 flow [2024-11-22 13:56:13,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.695652173913044) internal successors, (108), 23 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) [2024-11-22 13:56:13,618 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:13,618 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:56:13,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-22 13:56:13,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:56:13,819 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:13,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:13,819 INFO L85 PathProgramCache]: Analyzing trace with hash 470420290, now seen corresponding path program 7 times [2024-11-22 13:56:13,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:13,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16745423] [2024-11-22 13:56:13,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:56:13,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:56:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:56:14,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:56:14,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16745423] [2024-11-22 13:56:14,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16745423] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:56:14,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117914000] [2024-11-22 13:56:14,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 13:56:14,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:56:14,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:56:14,393 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:56:14,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-22 13:56:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 13:56:14,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-22 13:56:14,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:56:14,645 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:56:14,646 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 31 treesize of output 22 [2024-11-22 13:56:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:56:14,649 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:56:14,905 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-22 13:56:14,905 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-22 13:56:14,952 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-11-22 13:56:14,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-11-22 13:56:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:56:14,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117914000] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:56:14,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:56:14,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 26 [2024-11-22 13:56:14,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247798239] [2024-11-22 13:56:14,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:56:14,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-22 13:56:14,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:56:14,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-22 13:56:14,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2024-11-22 13:56:14,990 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:56:14,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 891 transitions, 20546 flow. Second operand has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 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) [2024-11-22 13:56:14,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:56:14,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:56:14,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:56:16,961 INFO L124 PetriNetUnfolderBase]: 2571/4690 cut-off events. [2024-11-22 13:56:16,961 INFO L125 PetriNetUnfolderBase]: For 148721/148721 co-relation queries the response was YES. [2024-11-22 13:56:16,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49719 conditions, 4690 events. 2571/4690 cut-off events. For 148721/148721 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 32233 event pairs, 181 based on Foata normal form. 8/4698 useless extension candidates. Maximal degree in co-relation 49512. Up to 4332 conditions per place. [2024-11-22 13:56:17,017 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 842 selfloop transitions, 96 changer transitions 20/959 dead transitions. [2024-11-22 13:56:17,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 959 transitions, 22942 flow [2024-11-22 13:56:17,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-22 13:56:17,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-22 13:56:17,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 230 transitions. [2024-11-22 13:56:17,018 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-11-22 13:56:17,018 INFO L175 Difference]: Start difference. First operand has 421 places, 891 transitions, 20546 flow. Second operand 27 states and 230 transitions. [2024-11-22 13:56:17,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 959 transitions, 22942 flow [2024-11-22 13:56:17,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 959 transitions, 22690 flow, removed 88 selfloop flow, removed 8 redundant places. [2024-11-22 13:56:17,890 INFO L231 Difference]: Finished difference. Result has 443 places, 887 transitions, 20440 flow [2024-11-22 13:56:17,891 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=20264, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=794, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=20440, PETRI_PLACES=443, PETRI_TRANSITIONS=887} [2024-11-22 13:56:17,891 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 422 predicate places. [2024-11-22 13:56:17,891 INFO L471 AbstractCegarLoop]: Abstraction has has 443 places, 887 transitions, 20440 flow [2024-11-22 13:56:17,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 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) [2024-11-22 13:56:17,891 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:17,892 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:56:17,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-22 13:56:18,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-22 13:56:18,092 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:18,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:18,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1179978804, now seen corresponding path program 8 times [2024-11-22 13:56:18,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:18,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276931589] [2024-11-22 13:56:18,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:56:18,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:18,108 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:56:18,108 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:56:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:56:18,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:56:18,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276931589] [2024-11-22 13:56:18,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276931589] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:56:18,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696121384] [2024-11-22 13:56:18,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 13:56:18,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:56:18,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:56:18,662 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:56:18,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-22 13:56:18,722 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 13:56:18,723 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:56:18,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-22 13:56:18,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:56:18,915 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:56:18,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 71 [2024-11-22 13:56:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:56:18,994 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:56:19,227 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-22 13:56:19,228 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-22 13:56:19,276 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-11-22 13:56:19,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-11-22 13:56:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:56:19,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696121384] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:56:19,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:56:19,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-11-22 13:56:19,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330588729] [2024-11-22 13:56:19,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:56:19,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-22 13:56:19,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:56:19,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-22 13:56:19,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2024-11-22 13:56:19,314 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:56:19,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 887 transitions, 20440 flow. Second operand has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 states have internal predecessors, (131), 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) [2024-11-22 13:56:19,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:56:19,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:56:19,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:56:21,294 INFO L124 PetriNetUnfolderBase]: 2615/4774 cut-off events. [2024-11-22 13:56:21,294 INFO L125 PetriNetUnfolderBase]: For 156793/156793 co-relation queries the response was YES. [2024-11-22 13:56:21,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50938 conditions, 4774 events. 2615/4774 cut-off events. For 156793/156793 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 32805 event pairs, 183 based on Foata normal form. 3/4777 useless extension candidates. Maximal degree in co-relation 50727. Up to 4389 conditions per place. [2024-11-22 13:56:21,346 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 848 selfloop transitions, 112 changer transitions 11/972 dead transitions. [2024-11-22 13:56:21,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 972 transitions, 23552 flow [2024-11-22 13:56:21,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-22 13:56:21,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-22 13:56:21,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 204 transitions. [2024-11-22 13:56:21,347 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.408 [2024-11-22 13:56:21,347 INFO L175 Difference]: Start difference. First operand has 443 places, 887 transitions, 20440 flow. Second operand 25 states and 204 transitions. [2024-11-22 13:56:21,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 972 transitions, 23552 flow [2024-11-22 13:56:22,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 972 transitions, 23263 flow, removed 54 selfloop flow, removed 22 redundant places. [2024-11-22 13:56:22,317 INFO L231 Difference]: Finished difference. Result has 452 places, 913 transitions, 21090 flow [2024-11-22 13:56:22,318 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=20169, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=887, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=781, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=21090, PETRI_PLACES=452, PETRI_TRANSITIONS=913} [2024-11-22 13:56:22,319 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 431 predicate places. [2024-11-22 13:56:22,319 INFO L471 AbstractCegarLoop]: Abstraction has has 452 places, 913 transitions, 21090 flow [2024-11-22 13:56:22,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 states have internal predecessors, (131), 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) [2024-11-22 13:56:22,319 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:22,319 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:56:22,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-22 13:56:22,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:56:22,520 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:22,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:22,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1258627044, now seen corresponding path program 9 times [2024-11-22 13:56:22,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:22,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219637075] [2024-11-22 13:56:22,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:56:22,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:22,538 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 13:56:22,538 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:56:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:56:23,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:56:23,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219637075] [2024-11-22 13:56:23,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219637075] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:56:23,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412719907] [2024-11-22 13:56:23,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 13:56:23,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:56:23,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:56:23,227 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:56:23,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-22 13:56:23,289 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 13:56:23,289 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:56:23,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-22 13:56:23,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:56:23,526 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:56:23,526 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 27 treesize of output 20 [2024-11-22 13:56:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:56:23,530 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:56:23,789 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-22 13:56:23,789 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-22 13:56:23,836 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-11-22 13:56:23,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-11-22 13:56:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:56:23,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412719907] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:56:23,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:56:23,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-11-22 13:56:23,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551738367] [2024-11-22 13:56:23,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:56:23,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-22 13:56:23,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:56:23,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-22 13:56:23,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2024-11-22 13:56:23,875 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:56:23,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 913 transitions, 21090 flow. Second operand has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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) [2024-11-22 13:56:23,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:56:23,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:56:23,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:56:26,318 INFO L124 PetriNetUnfolderBase]: 2624/4786 cut-off events. [2024-11-22 13:56:26,319 INFO L125 PetriNetUnfolderBase]: For 171704/171704 co-relation queries the response was YES. [2024-11-22 13:56:26,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51719 conditions, 4786 events. 2624/4786 cut-off events. For 171704/171704 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 33086 event pairs, 184 based on Foata normal form. 5/4791 useless extension candidates. Maximal degree in co-relation 51502. Up to 4459 conditions per place. [2024-11-22 13:56:26,382 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 867 selfloop transitions, 100 changer transitions 15/983 dead transitions. [2024-11-22 13:56:26,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 983 transitions, 23605 flow [2024-11-22 13:56:26,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-22 13:56:26,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-22 13:56:26,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 239 transitions. [2024-11-22 13:56:26,384 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3983333333333333 [2024-11-22 13:56:26,384 INFO L175 Difference]: Start difference. First operand has 452 places, 913 transitions, 21090 flow. Second operand 30 states and 239 transitions. [2024-11-22 13:56:26,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 983 transitions, 23605 flow [2024-11-22 13:56:27,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 983 transitions, 23392 flow, removed 61 selfloop flow, removed 14 redundant places. [2024-11-22 13:56:27,560 INFO L231 Difference]: Finished difference. Result has 470 places, 916 transitions, 21241 flow [2024-11-22 13:56:27,561 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=20877, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=913, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=813, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=21241, PETRI_PLACES=470, PETRI_TRANSITIONS=916} [2024-11-22 13:56:27,562 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 449 predicate places. [2024-11-22 13:56:27,562 INFO L471 AbstractCegarLoop]: Abstraction has has 470 places, 916 transitions, 21241 flow [2024-11-22 13:56:27,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 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) [2024-11-22 13:56:27,562 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 13:56:27,562 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 13:56:27,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-22 13:56:27,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:56:27,763 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-22 13:56:27,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 13:56:27,763 INFO L85 PathProgramCache]: Analyzing trace with hash -602665090, now seen corresponding path program 10 times [2024-11-22 13:56:27,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 13:56:27,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098650112] [2024-11-22 13:56:27,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:56:27,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 13:56:27,774 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:56:27,774 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:56:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 13:56:28,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 13:56:28,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098650112] [2024-11-22 13:56:28,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098650112] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 13:56:28,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120028060] [2024-11-22 13:56:28,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 13:56:28,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 13:56:28,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 13:56:28,431 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 13:56:28,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-22 13:56:28,491 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 13:56:28,492 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 13:56:28,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-22 13:56:28,493 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 13:56:28,691 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 13:56:28,691 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 31 treesize of output 22 [2024-11-22 13:56:28,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 13:56:28,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 13:56:28,961 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2024-11-22 13:56:28,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2024-11-22 13:56:29,062 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-22 13:56:29,063 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-22 13:56:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 13:56:29,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120028060] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 13:56:29,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 13:56:29,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 26 [2024-11-22 13:56:29,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908345234] [2024-11-22 13:56:29,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 13:56:29,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-22 13:56:29,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 13:56:29,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-22 13:56:29,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2024-11-22 13:56:29,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-22 13:56:29,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 916 transitions, 21241 flow. Second operand has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 27 states have internal predecessors, (130), 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) [2024-11-22 13:56:29,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 13:56:29,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-22 13:56:29,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 13:56:31,426 INFO L124 PetriNetUnfolderBase]: 2638/4799 cut-off events. [2024-11-22 13:56:31,426 INFO L125 PetriNetUnfolderBase]: For 177715/177715 co-relation queries the response was YES. [2024-11-22 13:56:31,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52341 conditions, 4799 events. 2638/4799 cut-off events. For 177715/177715 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 32965 event pairs, 182 based on Foata normal form. 5/4804 useless extension candidates. Maximal degree in co-relation 52120. Up to 4497 conditions per place. [2024-11-22 13:56:31,492 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 899 selfloop transitions, 82 changer transitions 11/993 dead transitions. [2024-11-22 13:56:31,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 993 transitions, 24005 flow [2024-11-22 13:56:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-22 13:56:31,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-22 13:56:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 230 transitions. [2024-11-22 13:56:31,496 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-11-22 13:56:31,496 INFO L175 Difference]: Start difference. First operand has 470 places, 916 transitions, 21241 flow. Second operand 28 states and 230 transitions. [2024-11-22 13:56:31,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 993 transitions, 24005 flow