./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 608e0c2870f111f9f6921442a1f1a544ee956a8de04c7629c0edf3e54cde4da3 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:35:38,000 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:35:38,055 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:35:38,066 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:35:38,068 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:35:38,095 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:35:38,096 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:35:38,096 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:35:38,097 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:35:38,098 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:35:38,100 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:35:38,100 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:35:38,101 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:35:38,101 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:35:38,101 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:35:38,101 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:35:38,101 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:35:38,102 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:35:38,102 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:35:38,102 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:35:38,102 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:35:38,104 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:35:38,104 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:35:38,104 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:35:38,104 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:35:38,105 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:35:38,105 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:35:38,105 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:35:38,105 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:35:38,106 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:35:38,106 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:35:38,106 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:35:38,106 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:35:38,107 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:35:38,107 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:35:38,107 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:35:38,107 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:35:38,107 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:35:38,108 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:35:38,108 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:35:38,108 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:35:38,108 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:35:38,109 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 608e0c2870f111f9f6921442a1f1a544ee956a8de04c7629c0edf3e54cde4da3 [2024-10-11 14:35:38,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:35:38,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:35:38,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:35:38,314 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:35:38,315 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:35:38,316 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2024-10-11 14:35:39,573 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:35:39,736 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:35:39,737 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2024-10-11 14:35:39,744 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/a3363d4e9/4c8da38d9ba54a50ac962ffff93f7f1e/FLAG29ae6276b [2024-10-11 14:35:40,133 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/a3363d4e9/4c8da38d9ba54a50ac962ffff93f7f1e [2024-10-11 14:35:40,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:35:40,137 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:35:40,139 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:35:40,140 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:35:40,144 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:35:40,144 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:35:40" (1/1) ... [2024-10-11 14:35:40,145 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cf57509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:40, skipping insertion in model container [2024-10-11 14:35:40,146 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:35:40" (1/1) ... [2024-10-11 14:35:40,161 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:35:40,334 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2464,2477] [2024-10-11 14:35:40,352 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:35:40,360 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:35:40,389 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2464,2477] [2024-10-11 14:35:40,395 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:35:40,422 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:35:40,423 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:40 WrapperNode [2024-10-11 14:35:40,423 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:35:40,424 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:35:40,424 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:35:40,424 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:35:40,429 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:40" (1/1) ... [2024-10-11 14:35:40,434 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:40" (1/1) ... [2024-10-11 14:35:40,449 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 125 [2024-10-11 14:35:40,450 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:35:40,450 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:35:40,450 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:35:40,451 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:35:40,458 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:40" (1/1) ... [2024-10-11 14:35:40,458 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:40" (1/1) ... [2024-10-11 14:35:40,460 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:40" (1/1) ... [2024-10-11 14:35:40,470 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-11 14:35:40,471 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:40" (1/1) ... [2024-10-11 14:35:40,471 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:40" (1/1) ... [2024-10-11 14:35:40,474 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:40" (1/1) ... [2024-10-11 14:35:40,477 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:40" (1/1) ... [2024-10-11 14:35:40,478 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:40" (1/1) ... [2024-10-11 14:35:40,478 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:40" (1/1) ... [2024-10-11 14:35:40,480 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:35:40,481 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:35:40,481 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:35:40,481 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:35:40,482 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:40" (1/1) ... [2024-10-11 14:35:40,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:35:40,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:40,506 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:35:40,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:35:40,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:35:40,550 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:35:40,550 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:35:40,550 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:35:40,550 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:35:40,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:35:40,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:35:40,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:35:40,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:35:40,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 14:35:40,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 14:35:40,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 14:35:40,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:35:40,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:35:40,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:35:40,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:35:40,552 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:35:40,634 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:35:40,640 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:35:40,863 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:35:40,863 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:35:41,053 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:35:41,054 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 14:35:41,054 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:35:41 BoogieIcfgContainer [2024-10-11 14:35:41,054 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:35:41,058 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:35:41,058 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:35:41,060 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:35:41,060 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:35:40" (1/3) ... [2024-10-11 14:35:41,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b604697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:35:41, skipping insertion in model container [2024-10-11 14:35:41,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:35:40" (2/3) ... [2024-10-11 14:35:41,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b604697 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:35:41, skipping insertion in model container [2024-10-11 14:35:41,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:35:41" (3/3) ... [2024-10-11 14:35:41,063 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2024-10-11 14:35:41,076 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:35:41,076 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:35:41,077 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:35:41,110 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 14:35:41,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 28 transitions, 70 flow [2024-10-11 14:35:41,160 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2024-10-11 14:35:41,162 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:35:41,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 5/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2024-10-11 14:35:41,165 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 28 transitions, 70 flow [2024-10-11 14:35:41,167 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 25 transitions, 62 flow [2024-10-11 14:35:41,174 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:35:41,179 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;@65196da0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:35:41,179 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-11 14:35:41,186 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:35:41,186 INFO L124 PetriNetUnfolderBase]: 5/24 cut-off events. [2024-10-11 14:35:41,186 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:35:41,186 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:41,187 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:41,187 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:41,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:41,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1302421153, now seen corresponding path program 1 times [2024-10-11 14:35:41,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:41,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234416163] [2024-10-11 14:35:41,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:41,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:41,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:41,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:41,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234416163] [2024-10-11 14:35:41,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234416163] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:35:41,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:35:41,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:35:41,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212722901] [2024-10-11 14:35:41,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:35:41,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 14:35:41,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:41,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 14:35:41,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 14:35:41,379 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:35:41,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 62 flow. Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:41,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:41,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:35:41,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:41,470 INFO L124 PetriNetUnfolderBase]: 122/217 cut-off events. [2024-10-11 14:35:41,471 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-11 14:35:41,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 217 events. 122/217 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 711 event pairs, 94 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 405. Up to 214 conditions per place. [2024-10-11 14:35:41,476 INFO L140 encePairwiseOnDemand]: 26/28 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2024-10-11 14:35:41,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 23 transitions, 98 flow [2024-10-11 14:35:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 14:35:41,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-11 14:35:41,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 32 transitions. [2024-10-11 14:35:41,486 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-10-11 14:35:41,488 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 62 flow. Second operand 2 states and 32 transitions. [2024-10-11 14:35:41,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 23 transitions, 98 flow [2024-10-11 14:35:41,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 23 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 14:35:41,494 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 50 flow [2024-10-11 14:35:41,495 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2024-10-11 14:35:41,498 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2024-10-11 14:35:41,498 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 50 flow [2024-10-11 14:35:41,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:41,498 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:41,498 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:41,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:35:41,499 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:41,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:41,500 INFO L85 PathProgramCache]: Analyzing trace with hash -406957548, now seen corresponding path program 1 times [2024-10-11 14:35:41,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:41,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113267361] [2024-10-11 14:35:41,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:41,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:41,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:41,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113267361] [2024-10-11 14:35:41,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113267361] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:35:41,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:35:41,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:35:41,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815877770] [2024-10-11 14:35:41,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:35:41,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:35:41,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:41,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:35:41,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:35:41,663 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:35:41,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:41,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:41,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:35:41,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:41,817 INFO L124 PetriNetUnfolderBase]: 203/353 cut-off events. [2024-10-11 14:35:41,817 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-11 14:35:41,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 353 events. 203/353 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1259 event pairs, 82 based on Foata normal form. 1/301 useless extension candidates. Maximal degree in co-relation 709. Up to 176 conditions per place. [2024-10-11 14:35:41,822 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 28 selfloop transitions, 2 changer transitions 3/36 dead transitions. [2024-10-11 14:35:41,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 36 transitions, 144 flow [2024-10-11 14:35:41,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:35:41,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:35:41,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-10-11 14:35:41,824 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-10-11 14:35:41,824 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 50 flow. Second operand 3 states and 49 transitions. [2024-10-11 14:35:41,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 36 transitions, 144 flow [2024-10-11 14:35:41,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 14:35:41,826 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 62 flow [2024-10-11 14:35:41,826 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2024-10-11 14:35:41,826 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2024-10-11 14:35:41,827 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 62 flow [2024-10-11 14:35:41,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:41,827 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:41,827 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:41,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:35:41,829 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:41,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:41,830 INFO L85 PathProgramCache]: Analyzing trace with hash -132930614, now seen corresponding path program 1 times [2024-10-11 14:35:41,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:41,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839939892] [2024-10-11 14:35:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:41,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:41,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:41,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839939892] [2024-10-11 14:35:41,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839939892] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:35:41,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:35:41,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:35:41,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215530275] [2024-10-11 14:35:41,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:35:41,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:35:41,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:41,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:35:41,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:35:41,911 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:35:41,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:41,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:41,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:35:41,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:41,989 INFO L124 PetriNetUnfolderBase]: 251/446 cut-off events. [2024-10-11 14:35:41,989 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-10-11 14:35:41,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 446 events. 251/446 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1673 event pairs, 113 based on Foata normal form. 11/385 useless extension candidates. Maximal degree in co-relation 934. Up to 306 conditions per place. [2024-10-11 14:35:41,991 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 27 selfloop transitions, 2 changer transitions 6/38 dead transitions. [2024-10-11 14:35:41,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 38 transitions, 163 flow [2024-10-11 14:35:41,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:35:41,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:35:41,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-10-11 14:35:41,995 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-10-11 14:35:41,995 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 62 flow. Second operand 3 states and 50 transitions. [2024-10-11 14:35:41,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 38 transitions, 163 flow [2024-10-11 14:35:41,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 38 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:35:41,997 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 72 flow [2024-10-11 14:35:41,997 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2024-10-11 14:35:41,997 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2024-10-11 14:35:41,998 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 72 flow [2024-10-11 14:35:41,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:41,998 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:41,998 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:41,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:35:41,999 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:41,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:41,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1274929099, now seen corresponding path program 1 times [2024-10-11 14:35:41,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:41,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448345275] [2024-10-11 14:35:41,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:42,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:42,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:42,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448345275] [2024-10-11 14:35:42,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448345275] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:35:42,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:35:42,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:35:42,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106938284] [2024-10-11 14:35:42,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:35:42,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:35:42,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:42,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:35:42,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:35:42,136 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:35:42,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:42,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:42,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:35:42,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:42,246 INFO L124 PetriNetUnfolderBase]: 319/585 cut-off events. [2024-10-11 14:35:42,246 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-10-11 14:35:42,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1268 conditions, 585 events. 319/585 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2454 event pairs, 285 based on Foata normal form. 12/501 useless extension candidates. Maximal degree in co-relation 1262. Up to 443 conditions per place. [2024-10-11 14:35:42,264 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 21 selfloop transitions, 2 changer transitions 15/41 dead transitions. [2024-10-11 14:35:42,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 184 flow [2024-10-11 14:35:42,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:35:42,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:35:42,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 57 transitions. [2024-10-11 14:35:42,266 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-10-11 14:35:42,266 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 72 flow. Second operand 4 states and 57 transitions. [2024-10-11 14:35:42,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 184 flow [2024-10-11 14:35:42,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:35:42,267 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 84 flow [2024-10-11 14:35:42,267 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2024-10-11 14:35:42,268 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2024-10-11 14:35:42,268 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 84 flow [2024-10-11 14:35:42,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:42,269 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:42,269 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:42,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:35:42,269 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:42,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:42,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2016933381, now seen corresponding path program 1 times [2024-10-11 14:35:42,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:42,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078240958] [2024-10-11 14:35:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:42,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:42,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:42,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078240958] [2024-10-11 14:35:42,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078240958] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:42,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052146552] [2024-10-11 14:35:42,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:42,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:42,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:42,716 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:42,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:35:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:42,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 14:35:42,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:42,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:43,014 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:35:43,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-10-11 14:35:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:43,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052146552] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:43,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:43,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-10-11 14:35:43,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11478756] [2024-10-11 14:35:43,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:43,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:35:43,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:43,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:35:43,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:35:43,152 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:35:43,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 84 flow. Second operand has 15 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 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) [2024-10-11 14:35:43,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:43,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:35:43,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:43,608 INFO L124 PetriNetUnfolderBase]: 911/1594 cut-off events. [2024-10-11 14:35:43,608 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2024-10-11 14:35:43,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3502 conditions, 1594 events. 911/1594 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7631 event pairs, 172 based on Foata normal form. 3/1350 useless extension candidates. Maximal degree in co-relation 3494. Up to 292 conditions per place. [2024-10-11 14:35:43,616 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 107 selfloop transitions, 16 changer transitions 27/153 dead transitions. [2024-10-11 14:35:43,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 153 transitions, 705 flow [2024-10-11 14:35:43,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 14:35:43,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-11 14:35:43,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 217 transitions. [2024-10-11 14:35:43,620 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-10-11 14:35:43,621 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 84 flow. Second operand 13 states and 217 transitions. [2024-10-11 14:35:43,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 153 transitions, 705 flow [2024-10-11 14:35:43,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 153 transitions, 697 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-10-11 14:35:43,625 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 206 flow [2024-10-11 14:35:43,627 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=206, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2024-10-11 14:35:43,627 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 21 predicate places. [2024-10-11 14:35:43,627 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 206 flow [2024-10-11 14:35:43,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 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) [2024-10-11 14:35:43,628 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:43,628 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:43,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 14:35:43,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:43,829 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:43,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:43,830 INFO L85 PathProgramCache]: Analyzing trace with hash -2052628911, now seen corresponding path program 2 times [2024-10-11 14:35:43,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:43,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597136551] [2024-10-11 14:35:43,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:43,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:35:43,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:43,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597136551] [2024-10-11 14:35:43,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597136551] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:43,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078112021] [2024-10-11 14:35:43,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:35:43,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:43,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:43,901 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:43,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:35:43,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:35:43,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:43,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 14:35:43,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:35:44,020 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:35:44,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078112021] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:44,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:44,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 10 [2024-10-11 14:35:44,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876974946] [2024-10-11 14:35:44,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:44,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 14:35:44,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:44,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 14:35:44,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-10-11 14:35:44,103 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:35:44,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 206 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:44,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:44,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:35:44,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:44,347 INFO L124 PetriNetUnfolderBase]: 1097/1958 cut-off events. [2024-10-11 14:35:44,347 INFO L125 PetriNetUnfolderBase]: For 1580/1580 co-relation queries the response was YES. [2024-10-11 14:35:44,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4711 conditions, 1958 events. 1097/1958 cut-off events. For 1580/1580 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9870 event pairs, 348 based on Foata normal form. 64/1710 useless extension candidates. Maximal degree in co-relation 4698. Up to 462 conditions per place. [2024-10-11 14:35:44,354 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 49 selfloop transitions, 9 changer transitions 68/129 dead transitions. [2024-10-11 14:35:44,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 129 transitions, 682 flow [2024-10-11 14:35:44,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 14:35:44,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-11 14:35:44,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-10-11 14:35:44,356 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-10-11 14:35:44,356 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 206 flow. Second operand 11 states and 181 transitions. [2024-10-11 14:35:44,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 129 transitions, 682 flow [2024-10-11 14:35:44,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 129 transitions, 642 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-10-11 14:35:44,362 INFO L231 Difference]: Finished difference. Result has 54 places, 33 transitions, 183 flow [2024-10-11 14:35:44,362 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=183, PETRI_PLACES=54, PETRI_TRANSITIONS=33} [2024-10-11 14:35:44,362 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 27 predicate places. [2024-10-11 14:35:44,363 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 33 transitions, 183 flow [2024-10-11 14:35:44,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:44,363 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:44,363 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:44,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 14:35:44,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:44,568 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:44,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:44,569 INFO L85 PathProgramCache]: Analyzing trace with hash 178691706, now seen corresponding path program 3 times [2024-10-11 14:35:44,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:44,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413247673] [2024-10-11 14:35:44,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:44,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:44,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:44,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413247673] [2024-10-11 14:35:44,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413247673] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:44,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200701338] [2024-10-11 14:35:44,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:35:44,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:44,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:44,982 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:44,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:35:45,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-11 14:35:45,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:45,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-11 14:35:45,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:45,201 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:45,251 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:35:45,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-10-11 14:35:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:45,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200701338] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:45,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:45,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-10-11 14:35:45,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844731995] [2024-10-11 14:35:45,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:45,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 14:35:45,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:45,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 14:35:45,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-10-11 14:35:45,404 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:35:45,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 33 transitions, 183 flow. Second operand has 21 states, 21 states have (on average 7.857142857142857) internal successors, (165), 21 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:45,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:45,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:35:45,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:46,382 INFO L124 PetriNetUnfolderBase]: 1387/2475 cut-off events. [2024-10-11 14:35:46,382 INFO L125 PetriNetUnfolderBase]: For 2671/2671 co-relation queries the response was YES. [2024-10-11 14:35:46,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6227 conditions, 2475 events. 1387/2475 cut-off events. For 2671/2671 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 13075 event pairs, 224 based on Foata normal form. 52/2131 useless extension candidates. Maximal degree in co-relation 6212. Up to 450 conditions per place. [2024-10-11 14:35:46,392 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 92 selfloop transitions, 15 changer transitions 82/192 dead transitions. [2024-10-11 14:35:46,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 192 transitions, 1050 flow [2024-10-11 14:35:46,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 14:35:46,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-11 14:35:46,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 278 transitions. [2024-10-11 14:35:46,394 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5515873015873016 [2024-10-11 14:35:46,396 INFO L175 Difference]: Start difference. First operand has 54 places, 33 transitions, 183 flow. Second operand 18 states and 278 transitions. [2024-10-11 14:35:46,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 192 transitions, 1050 flow [2024-10-11 14:35:46,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 192 transitions, 982 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-10-11 14:35:46,404 INFO L231 Difference]: Finished difference. Result has 65 places, 39 transitions, 264 flow [2024-10-11 14:35:46,404 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=264, PETRI_PLACES=65, PETRI_TRANSITIONS=39} [2024-10-11 14:35:46,405 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 38 predicate places. [2024-10-11 14:35:46,405 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 39 transitions, 264 flow [2024-10-11 14:35:46,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.857142857142857) internal successors, (165), 21 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:46,406 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:46,406 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:46,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 14:35:46,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:46,608 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:46,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:46,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1647887852, now seen corresponding path program 4 times [2024-10-11 14:35:46,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:46,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352921453] [2024-10-11 14:35:46,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:46,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:47,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:47,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352921453] [2024-10-11 14:35:47,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352921453] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:47,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547226615] [2024-10-11 14:35:47,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:35:47,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:47,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:47,023 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:47,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:35:47,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:35:47,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:47,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-11 14:35:47,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:47,160 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 23 treesize of output 1 [2024-10-11 14:35:47,530 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:35:47,530 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 23 treesize of output 10 [2024-10-11 14:35:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:47,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:47,963 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 39 treesize of output 35 [2024-10-11 14:35:47,974 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-11 14:35:47,975 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 51 treesize of output 43 [2024-10-11 14:35:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:48,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547226615] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:48,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:48,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-11 14:35:48,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546521358] [2024-10-11 14:35:48,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:48,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 14:35:48,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:48,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 14:35:48,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-10-11 14:35:48,083 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:35:48,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 39 transitions, 264 flow. Second operand has 24 states, 24 states have (on average 8.208333333333334) internal successors, (197), 24 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:48,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:48,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:35:48,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:48,777 INFO L124 PetriNetUnfolderBase]: 1097/1959 cut-off events. [2024-10-11 14:35:48,777 INFO L125 PetriNetUnfolderBase]: For 2220/2220 co-relation queries the response was YES. [2024-10-11 14:35:48,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5051 conditions, 1959 events. 1097/1959 cut-off events. For 2220/2220 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 9925 event pairs, 427 based on Foata normal form. 1/1649 useless extension candidates. Maximal degree in co-relation 5030. Up to 820 conditions per place. [2024-10-11 14:35:48,783 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 35 selfloop transitions, 6 changer transitions 71/115 dead transitions. [2024-10-11 14:35:48,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 115 transitions, 683 flow [2024-10-11 14:35:48,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 14:35:48,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-11 14:35:48,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 160 transitions. [2024-10-11 14:35:48,784 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5194805194805194 [2024-10-11 14:35:48,784 INFO L175 Difference]: Start difference. First operand has 65 places, 39 transitions, 264 flow. Second operand 11 states and 160 transitions. [2024-10-11 14:35:48,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 115 transitions, 683 flow [2024-10-11 14:35:48,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 115 transitions, 628 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-10-11 14:35:48,790 INFO L231 Difference]: Finished difference. Result has 62 places, 34 transitions, 189 flow [2024-10-11 14:35:48,790 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=189, PETRI_PLACES=62, PETRI_TRANSITIONS=34} [2024-10-11 14:35:48,791 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 35 predicate places. [2024-10-11 14:35:48,791 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 34 transitions, 189 flow [2024-10-11 14:35:48,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.208333333333334) internal successors, (197), 24 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:48,791 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:48,791 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:48,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 14:35:48,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-11 14:35:48,993 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:48,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:48,994 INFO L85 PathProgramCache]: Analyzing trace with hash 2122792042, now seen corresponding path program 5 times [2024-10-11 14:35:48,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:48,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737319439] [2024-10-11 14:35:48,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:48,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:49,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:49,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:49,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737319439] [2024-10-11 14:35:49,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737319439] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:49,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680545512] [2024-10-11 14:35:49,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:35:49,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:49,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:49,572 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:49,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 14:35:49,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-11 14:35:49,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:49,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-11 14:35:49,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:49,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:35:49,747 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:49,770 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-11 14:35:49,770 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 25 treesize of output 13 [2024-10-11 14:35:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:35:49,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680545512] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:49,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:49,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 16 [2024-10-11 14:35:49,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861935202] [2024-10-11 14:35:49,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:49,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 14:35:49,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:49,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 14:35:49,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:35:49,795 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:35:49,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 34 transitions, 189 flow. Second operand has 17 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:49,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:49,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:35:49,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:50,366 INFO L124 PetriNetUnfolderBase]: 1379/2406 cut-off events. [2024-10-11 14:35:50,366 INFO L125 PetriNetUnfolderBase]: For 2431/2431 co-relation queries the response was YES. [2024-10-11 14:35:50,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6203 conditions, 2406 events. 1379/2406 cut-off events. For 2431/2431 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 11961 event pairs, 208 based on Foata normal form. 5/2038 useless extension candidates. Maximal degree in co-relation 6185. Up to 427 conditions per place. [2024-10-11 14:35:50,372 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 95 selfloop transitions, 23 changer transitions 39/160 dead transitions. [2024-10-11 14:35:50,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 160 transitions, 907 flow [2024-10-11 14:35:50,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 14:35:50,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-11 14:35:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 231 transitions. [2024-10-11 14:35:50,373 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-10-11 14:35:50,373 INFO L175 Difference]: Start difference. First operand has 62 places, 34 transitions, 189 flow. Second operand 15 states and 231 transitions. [2024-10-11 14:35:50,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 160 transitions, 907 flow [2024-10-11 14:35:50,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 160 transitions, 873 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-10-11 14:35:50,379 INFO L231 Difference]: Finished difference. Result has 64 places, 45 transitions, 366 flow [2024-10-11 14:35:50,379 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=366, PETRI_PLACES=64, PETRI_TRANSITIONS=45} [2024-10-11 14:35:50,380 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 37 predicate places. [2024-10-11 14:35:50,380 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 45 transitions, 366 flow [2024-10-11 14:35:50,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:50,380 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:50,380 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:50,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 14:35:50,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:50,581 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:50,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:50,582 INFO L85 PathProgramCache]: Analyzing trace with hash 898550012, now seen corresponding path program 6 times [2024-10-11 14:35:50,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:50,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613347146] [2024-10-11 14:35:50,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:50,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:50,641 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 14:35:50,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:50,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613347146] [2024-10-11 14:35:50,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613347146] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:50,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721663373] [2024-10-11 14:35:50,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:35:50,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:50,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:50,644 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:50,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 14:35:50,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-11 14:35:50,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:50,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:35:50,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 14:35:50,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:35:50,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721663373] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:50,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:50,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2024-10-11 14:35:50,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716836754] [2024-10-11 14:35:50,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:50,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 14:35:50,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:50,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 14:35:50,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-10-11 14:35:50,834 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:35:50,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 45 transitions, 366 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:50,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:50,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:35:50,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:51,154 INFO L124 PetriNetUnfolderBase]: 2657/4606 cut-off events. [2024-10-11 14:35:51,154 INFO L125 PetriNetUnfolderBase]: For 7265/7265 co-relation queries the response was YES. [2024-10-11 14:35:51,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12294 conditions, 4606 events. 2657/4606 cut-off events. For 7265/7265 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25707 event pairs, 713 based on Foata normal form. 22/3911 useless extension candidates. Maximal degree in co-relation 12273. Up to 1360 conditions per place. [2024-10-11 14:35:51,169 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 74 selfloop transitions, 27 changer transitions 0/104 dead transitions. [2024-10-11 14:35:51,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 104 transitions, 922 flow [2024-10-11 14:35:51,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:35:51,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:35:51,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-10-11 14:35:51,170 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6642857142857143 [2024-10-11 14:35:51,170 INFO L175 Difference]: Start difference. First operand has 64 places, 45 transitions, 366 flow. Second operand 5 states and 93 transitions. [2024-10-11 14:35:51,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 104 transitions, 922 flow [2024-10-11 14:35:51,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 104 transitions, 762 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-10-11 14:35:51,178 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 512 flow [2024-10-11 14:35:51,178 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=512, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2024-10-11 14:35:51,178 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 35 predicate places. [2024-10-11 14:35:51,178 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 512 flow [2024-10-11 14:35:51,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:51,179 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:51,179 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:51,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 14:35:51,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 14:35:51,380 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:51,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:51,380 INFO L85 PathProgramCache]: Analyzing trace with hash -846417175, now seen corresponding path program 7 times [2024-10-11 14:35:51,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:51,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039414304] [2024-10-11 14:35:51,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:51,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:51,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:51,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039414304] [2024-10-11 14:35:51,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039414304] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:51,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310327526] [2024-10-11 14:35:51,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:35:51,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:51,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:51,764 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:51,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 14:35:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:51,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-11 14:35:51,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:52,076 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:35:52,076 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 23 treesize of output 10 [2024-10-11 14:35:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:52,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:52,118 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:35:52,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-10-11 14:35:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:52,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310327526] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:52,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:52,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-10-11 14:35:52,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554028756] [2024-10-11 14:35:52,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:52,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-11 14:35:52,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:52,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-11 14:35:52,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2024-10-11 14:35:52,550 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:35:52,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 512 flow. Second operand has 33 states, 33 states have (on average 7.7272727272727275) internal successors, (255), 33 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:52,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:52,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:35:52,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:54,334 INFO L124 PetriNetUnfolderBase]: 5351/9326 cut-off events. [2024-10-11 14:35:54,334 INFO L125 PetriNetUnfolderBase]: For 11944/11944 co-relation queries the response was YES. [2024-10-11 14:35:54,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24316 conditions, 9326 events. 5351/9326 cut-off events. For 11944/11944 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 59374 event pairs, 561 based on Foata normal form. 129/7986 useless extension candidates. Maximal degree in co-relation 24295. Up to 1725 conditions per place. [2024-10-11 14:35:54,366 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 233 selfloop transitions, 78 changer transitions 69/383 dead transitions. [2024-10-11 14:35:54,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 383 transitions, 2477 flow [2024-10-11 14:35:54,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-11 14:35:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-10-11 14:35:54,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 499 transitions. [2024-10-11 14:35:54,371 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.594047619047619 [2024-10-11 14:35:54,371 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 512 flow. Second operand 30 states and 499 transitions. [2024-10-11 14:35:54,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 383 transitions, 2477 flow [2024-10-11 14:35:54,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 383 transitions, 2363 flow, removed 57 selfloop flow, removed 0 redundant places. [2024-10-11 14:35:54,396 INFO L231 Difference]: Finished difference. Result has 105 places, 102 transitions, 1123 flow [2024-10-11 14:35:54,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1123, PETRI_PLACES=105, PETRI_TRANSITIONS=102} [2024-10-11 14:35:54,396 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 78 predicate places. [2024-10-11 14:35:54,397 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 102 transitions, 1123 flow [2024-10-11 14:35:54,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.7272727272727275) internal successors, (255), 33 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:54,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:54,397 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:54,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-11 14:35:54,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:54,602 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:54,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:54,603 INFO L85 PathProgramCache]: Analyzing trace with hash -591025093, now seen corresponding path program 8 times [2024-10-11 14:35:54,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:54,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068609447] [2024-10-11 14:35:54,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:54,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:55,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:55,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068609447] [2024-10-11 14:35:55,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068609447] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:55,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329926547] [2024-10-11 14:35:55,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:35:55,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:55,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:55,067 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:55,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 14:35:55,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:35:55,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:35:55,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-11 14:35:55,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:35:55,228 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 23 treesize of output 1 [2024-10-11 14:35:55,642 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-10-11 14:35:55,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2024-10-11 14:35:55,647 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:55,648 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:35:56,266 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 39 treesize of output 35 [2024-10-11 14:35:56,274 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-11 14:35:56,274 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 51 treesize of output 43 [2024-10-11 14:35:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:56,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329926547] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:35:56,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:35:56,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-10-11 14:35:56,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255429010] [2024-10-11 14:35:56,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:35:56,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-11 14:35:56,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:35:56,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-11 14:35:56,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2024-10-11 14:35:56,421 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:35:56,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 102 transitions, 1123 flow. Second operand has 33 states, 33 states have (on average 7.96969696969697) internal successors, (263), 33 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:56,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:35:56,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:35:56,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:35:58,684 INFO L124 PetriNetUnfolderBase]: 5132/8936 cut-off events. [2024-10-11 14:35:58,684 INFO L125 PetriNetUnfolderBase]: For 20993/20993 co-relation queries the response was YES. [2024-10-11 14:35:58,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24994 conditions, 8936 events. 5132/8936 cut-off events. For 20993/20993 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 57632 event pairs, 1814 based on Foata normal form. 2/7532 useless extension candidates. Maximal degree in co-relation 24958. Up to 4746 conditions per place. [2024-10-11 14:35:58,715 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 72 selfloop transitions, 10 changer transitions 198/283 dead transitions. [2024-10-11 14:35:58,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 283 transitions, 2163 flow [2024-10-11 14:35:58,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 14:35:58,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-11 14:35:58,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 337 transitions. [2024-10-11 14:35:58,716 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.547077922077922 [2024-10-11 14:35:58,717 INFO L175 Difference]: Start difference. First operand has 105 places, 102 transitions, 1123 flow. Second operand 22 states and 337 transitions. [2024-10-11 14:35:58,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 283 transitions, 2163 flow [2024-10-11 14:35:58,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 283 transitions, 2066 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-10-11 14:35:58,810 INFO L231 Difference]: Finished difference. Result has 123 places, 74 transitions, 735 flow [2024-10-11 14:35:58,810 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1027, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=735, PETRI_PLACES=123, PETRI_TRANSITIONS=74} [2024-10-11 14:35:58,810 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 96 predicate places. [2024-10-11 14:35:58,810 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 74 transitions, 735 flow [2024-10-11 14:35:58,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.96969696969697) internal successors, (263), 33 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:35:58,811 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:35:58,811 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:35:58,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-11 14:35:59,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-11 14:35:59,011 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:35:59,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:35:59,012 INFO L85 PathProgramCache]: Analyzing trace with hash -275602663, now seen corresponding path program 9 times [2024-10-11 14:35:59,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:35:59,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448168312] [2024-10-11 14:35:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:35:59,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:35:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:35:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:35:59,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:35:59,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448168312] [2024-10-11 14:35:59,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448168312] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:35:59,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647719600] [2024-10-11 14:35:59,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:35:59,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:35:59,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:35:59,884 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:35:59,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 14:36:00,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 14:36:00,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:36:00,012 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-11 14:36:00,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:36:00,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-11 14:36:00,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-11 14:36:00,330 INFO L349 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2024-10-11 14:36:00,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 13 [2024-10-11 14:36:00,336 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:36:00,336 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:36:00,972 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 83 treesize of output 77 [2024-10-11 14:36:00,987 INFO L349 Elim1Store]: treesize reduction 10, result has 47.4 percent of original size [2024-10-11 14:36:00,988 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 170 treesize of output 158 [2024-10-11 14:36:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:36:01,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647719600] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:36:01,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:36:01,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2024-10-11 14:36:01,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639004017] [2024-10-11 14:36:01,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:36:01,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-11 14:36:01,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:36:01,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-11 14:36:01,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2024-10-11 14:36:01,130 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:36:01,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 74 transitions, 735 flow. Second operand has 34 states, 34 states have (on average 7.852941176470588) internal successors, (267), 34 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:36:01,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:36:01,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:36:01,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:36:05,183 INFO L124 PetriNetUnfolderBase]: 8936/15438 cut-off events. [2024-10-11 14:36:05,184 INFO L125 PetriNetUnfolderBase]: For 43119/43119 co-relation queries the response was YES. [2024-10-11 14:36:05,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43596 conditions, 15438 events. 8936/15438 cut-off events. For 43119/43119 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 107599 event pairs, 2674 based on Foata normal form. 105/13127 useless extension candidates. Maximal degree in co-relation 43556. Up to 4746 conditions per place. [2024-10-11 14:36:05,242 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 72 selfloop transitions, 9 changer transitions 424/508 dead transitions. [2024-10-11 14:36:05,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 508 transitions, 3980 flow [2024-10-11 14:36:05,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-11 14:36:05,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-10-11 14:36:05,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 579 transitions. [2024-10-11 14:36:05,245 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5908163265306122 [2024-10-11 14:36:05,245 INFO L175 Difference]: Start difference. First operand has 123 places, 74 transitions, 735 flow. Second operand 35 states and 579 transitions. [2024-10-11 14:36:05,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 508 transitions, 3980 flow [2024-10-11 14:36:05,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 508 transitions, 3430 flow, removed 152 selfloop flow, removed 19 redundant places. [2024-10-11 14:36:05,660 INFO L231 Difference]: Finished difference. Result has 137 places, 73 transitions, 737 flow [2024-10-11 14:36:05,660 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=737, PETRI_PLACES=137, PETRI_TRANSITIONS=73} [2024-10-11 14:36:05,661 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 110 predicate places. [2024-10-11 14:36:05,661 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 73 transitions, 737 flow [2024-10-11 14:36:05,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 7.852941176470588) internal successors, (267), 34 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:36:05,661 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:36:05,661 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:36:05,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-11 14:36:05,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:36:05,866 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:36:05,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:36:05,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1457377621, now seen corresponding path program 10 times [2024-10-11 14:36:05,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:36:05,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136279247] [2024-10-11 14:36:05,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:36:05,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:36:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:36:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:36:06,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:36:06,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136279247] [2024-10-11 14:36:06,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136279247] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:36:06,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426465749] [2024-10-11 14:36:06,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:36:06,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:36:06,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:36:06,988 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:36:06,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 14:36:07,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:36:07,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:36:07,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-11 14:36:07,057 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:36:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:36:07,221 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:36:07,244 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-11 14:36:07,244 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 25 treesize of output 13 [2024-10-11 14:36:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 14:36:07,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426465749] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:36:07,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:36:07,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 23 [2024-10-11 14:36:07,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866673689] [2024-10-11 14:36:07,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:36:07,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 14:36:07,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:36:07,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 14:36:07,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2024-10-11 14:36:07,267 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:36:07,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 73 transitions, 737 flow. Second operand has 24 states, 24 states have (on average 7.958333333333333) internal successors, (191), 24 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:36:07,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:36:07,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:36:07,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:36:08,732 INFO L124 PetriNetUnfolderBase]: 5286/9079 cut-off events. [2024-10-11 14:36:08,733 INFO L125 PetriNetUnfolderBase]: For 51419/51419 co-relation queries the response was YES. [2024-10-11 14:36:08,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28636 conditions, 9079 events. 5286/9079 cut-off events. For 51419/51419 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 56008 event pairs, 604 based on Foata normal form. 15/7688 useless extension candidates. Maximal degree in co-relation 28580. Up to 1650 conditions per place. [2024-10-11 14:36:08,773 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 127 selfloop transitions, 86 changer transitions 57/273 dead transitions. [2024-10-11 14:36:08,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 273 transitions, 2398 flow [2024-10-11 14:36:08,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-11 14:36:08,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-11 14:36:08,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 326 transitions. [2024-10-11 14:36:08,776 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-10-11 14:36:08,776 INFO L175 Difference]: Start difference. First operand has 137 places, 73 transitions, 737 flow. Second operand 21 states and 326 transitions. [2024-10-11 14:36:08,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 273 transitions, 2398 flow [2024-10-11 14:36:08,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 273 transitions, 1952 flow, removed 211 selfloop flow, removed 33 redundant places. [2024-10-11 14:36:08,961 INFO L231 Difference]: Finished difference. Result has 110 places, 108 transitions, 1352 flow [2024-10-11 14:36:08,961 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1352, PETRI_PLACES=110, PETRI_TRANSITIONS=108} [2024-10-11 14:36:08,961 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 83 predicate places. [2024-10-11 14:36:08,961 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 108 transitions, 1352 flow [2024-10-11 14:36:08,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.958333333333333) internal successors, (191), 24 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:36:08,962 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:36:08,962 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:36:08,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-11 14:36:09,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-11 14:36:09,162 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:36:09,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:36:09,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1652630351, now seen corresponding path program 11 times [2024-10-11 14:36:09,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:36:09,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211797881] [2024-10-11 14:36:09,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:36:09,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:36:09,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:36:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 14:36:09,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:36:09,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211797881] [2024-10-11 14:36:09,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211797881] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:36:09,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493063057] [2024-10-11 14:36:09,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:36:09,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:36:09,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:36:09,244 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:36:09,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 14:36:09,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-11 14:36:09,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:36:09,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 14:36:09,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:36:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 14:36:09,373 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:36:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 14:36:09,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493063057] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:36:09,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:36:09,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 12 [2024-10-11 14:36:09,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082380596] [2024-10-11 14:36:09,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:36:09,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 14:36:09,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:36:09,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 14:36:09,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2024-10-11 14:36:09,509 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:36:09,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 108 transitions, 1352 flow. Second operand has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:36:09,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:36:09,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:36:09,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:36:10,734 INFO L124 PetriNetUnfolderBase]: 9364/16041 cut-off events. [2024-10-11 14:36:10,735 INFO L125 PetriNetUnfolderBase]: For 39881/39881 co-relation queries the response was YES. [2024-10-11 14:36:10,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46300 conditions, 16041 events. 9364/16041 cut-off events. For 39881/39881 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 109522 event pairs, 1913 based on Foata normal form. 22/13578 useless extension candidates. Maximal degree in co-relation 46257. Up to 4280 conditions per place. [2024-10-11 14:36:10,875 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 110 selfloop transitions, 104 changer transitions 0/217 dead transitions. [2024-10-11 14:36:10,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 217 transitions, 2999 flow [2024-10-11 14:36:10,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:36:10,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:36:10,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-10-11 14:36:10,876 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-10-11 14:36:10,876 INFO L175 Difference]: Start difference. First operand has 110 places, 108 transitions, 1352 flow. Second operand 6 states and 114 transitions. [2024-10-11 14:36:10,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 217 transitions, 2999 flow [2024-10-11 14:36:10,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 217 transitions, 2771 flow, removed 109 selfloop flow, removed 6 redundant places. [2024-10-11 14:36:10,980 INFO L231 Difference]: Finished difference. Result has 110 places, 161 transitions, 2325 flow [2024-10-11 14:36:10,980 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2325, PETRI_PLACES=110, PETRI_TRANSITIONS=161} [2024-10-11 14:36:10,981 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 83 predicate places. [2024-10-11 14:36:10,981 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 161 transitions, 2325 flow [2024-10-11 14:36:10,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:36:10,981 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:36:10,981 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:36:10,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-11 14:36:11,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-11 14:36:11,186 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:36:11,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:36:11,186 INFO L85 PathProgramCache]: Analyzing trace with hash -31066858, now seen corresponding path program 12 times [2024-10-11 14:36:11,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:36:11,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595051993] [2024-10-11 14:36:11,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:36:11,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:36:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:36:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:36:11,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:36:11,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595051993] [2024-10-11 14:36:11,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595051993] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:36:11,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691428728] [2024-10-11 14:36:11,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:36:11,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:36:11,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:36:11,977 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:36:11,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 14:36:12,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-11 14:36:12,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:36:12,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 14:36:12,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:36:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-11 14:36:12,248 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:36:12,296 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:36:12,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-10-11 14:36:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 5 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 14:36:12,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691428728] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:36:12,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:36:12,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 10] total 29 [2024-10-11 14:36:12,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903543122] [2024-10-11 14:36:12,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:36:12,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-11 14:36:12,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:36:12,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-11 14:36:12,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2024-10-11 14:36:12,547 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:36:12,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 161 transitions, 2325 flow. Second operand has 30 states, 30 states have (on average 8.4) internal successors, (252), 30 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:36:12,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:36:12,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:36:12,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:36:16,434 INFO L124 PetriNetUnfolderBase]: 15025/25756 cut-off events. [2024-10-11 14:36:16,434 INFO L125 PetriNetUnfolderBase]: For 70741/70741 co-relation queries the response was YES. [2024-10-11 14:36:16,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74825 conditions, 25756 events. 15025/25756 cut-off events. For 70741/70741 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 187125 event pairs, 1258 based on Foata normal form. 16/21779 useless extension candidates. Maximal degree in co-relation 74781. Up to 4725 conditions per place. [2024-10-11 14:36:16,541 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 376 selfloop transitions, 225 changer transitions 90/694 dead transitions. [2024-10-11 14:36:16,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 694 transitions, 6738 flow [2024-10-11 14:36:16,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-10-11 14:36:16,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-10-11 14:36:16,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 764 transitions. [2024-10-11 14:36:16,544 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6063492063492063 [2024-10-11 14:36:16,545 INFO L175 Difference]: Start difference. First operand has 110 places, 161 transitions, 2325 flow. Second operand 45 states and 764 transitions. [2024-10-11 14:36:16,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 694 transitions, 6738 flow [2024-10-11 14:36:16,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 694 transitions, 6406 flow, removed 166 selfloop flow, removed 0 redundant places. [2024-10-11 14:36:16,807 INFO L231 Difference]: Finished difference. Result has 170 places, 259 transitions, 3975 flow [2024-10-11 14:36:16,812 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2175, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=3975, PETRI_PLACES=170, PETRI_TRANSITIONS=259} [2024-10-11 14:36:16,812 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 143 predicate places. [2024-10-11 14:36:16,812 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 259 transitions, 3975 flow [2024-10-11 14:36:16,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 8.4) internal successors, (252), 30 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:36:16,813 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:36:16,813 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:36:16,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-11 14:36:17,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-11 14:36:17,013 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:36:17,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:36:17,014 INFO L85 PathProgramCache]: Analyzing trace with hash 618730928, now seen corresponding path program 13 times [2024-10-11 14:36:17,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:36:17,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463440276] [2024-10-11 14:36:17,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:36:17,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:36:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:36:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:36:18,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:36:18,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463440276] [2024-10-11 14:36:18,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463440276] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:36:18,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415642733] [2024-10-11 14:36:18,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:36:18,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:36:18,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:36:18,193 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:36:18,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 14:36:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:36:18,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-11 14:36:18,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:36:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:36:18,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:36:18,598 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-11 14:36:18,598 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 25 treesize of output 13 [2024-10-11 14:36:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 14:36:18,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415642733] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:36:18,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:36:18,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 10] total 28 [2024-10-11 14:36:18,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226580809] [2024-10-11 14:36:18,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:36:18,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-11 14:36:18,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:36:18,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-11 14:36:18,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2024-10-11 14:36:18,639 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:36:18,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 259 transitions, 3975 flow. Second operand has 29 states, 29 states have (on average 7.896551724137931) internal successors, (229), 29 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:36:18,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:36:18,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:36:18,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:36:23,718 INFO L124 PetriNetUnfolderBase]: 18305/31302 cut-off events. [2024-10-11 14:36:23,718 INFO L125 PetriNetUnfolderBase]: For 110605/110605 co-relation queries the response was YES. [2024-10-11 14:36:23,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91535 conditions, 31302 events. 18305/31302 cut-off events. For 110605/110605 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 235131 event pairs, 2147 based on Foata normal form. 29/26477 useless extension candidates. Maximal degree in co-relation 91474. Up to 5750 conditions per place. [2024-10-11 14:36:23,910 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 174 selfloop transitions, 285 changer transitions 93/555 dead transitions. [2024-10-11 14:36:23,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 555 transitions, 6353 flow [2024-10-11 14:36:23,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-11 14:36:23,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-11 14:36:23,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 460 transitions. [2024-10-11 14:36:23,912 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5867346938775511 [2024-10-11 14:36:23,912 INFO L175 Difference]: Start difference. First operand has 170 places, 259 transitions, 3975 flow. Second operand 28 states and 460 transitions. [2024-10-11 14:36:23,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 555 transitions, 6353 flow [2024-10-11 14:36:24,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 555 transitions, 5795 flow, removed 68 selfloop flow, removed 13 redundant places. [2024-10-11 14:36:24,478 INFO L231 Difference]: Finished difference. Result has 200 places, 307 transitions, 5221 flow [2024-10-11 14:36:24,479 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3457, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5221, PETRI_PLACES=200, PETRI_TRANSITIONS=307} [2024-10-11 14:36:24,479 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 173 predicate places. [2024-10-11 14:36:24,480 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 307 transitions, 5221 flow [2024-10-11 14:36:24,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.896551724137931) internal successors, (229), 29 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:36:24,480 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:36:24,480 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:36:24,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-11 14:36:24,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-11 14:36:24,681 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:36:24,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:36:24,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1537074276, now seen corresponding path program 14 times [2024-10-11 14:36:24,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:36:24,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118601400] [2024-10-11 14:36:24,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:36:24,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:36:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:36:24,791 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 14:36:24,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:36:24,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118601400] [2024-10-11 14:36:24,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118601400] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:36:24,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985145059] [2024-10-11 14:36:24,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:36:24,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:36:24,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:36:24,794 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:36:24,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 14:36:24,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:36:24,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:36:24,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:36:24,878 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:36:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 14:36:24,935 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:36:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 44 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 14:36:25,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985145059] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:36:25,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:36:25,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 10] total 15 [2024-10-11 14:36:25,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211827167] [2024-10-11 14:36:25,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:36:25,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 14:36:25,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:36:25,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 14:36:25,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2024-10-11 14:36:25,099 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:36:25,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 307 transitions, 5221 flow. Second operand has 16 states, 16 states have (on average 9.9375) internal successors, (159), 16 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:36:25,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:36:25,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:36:25,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:36:32,544 INFO L124 PetriNetUnfolderBase]: 28463/48602 cut-off events. [2024-10-11 14:36:32,545 INFO L125 PetriNetUnfolderBase]: For 181774/181774 co-relation queries the response was YES. [2024-10-11 14:36:33,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148595 conditions, 48602 events. 28463/48602 cut-off events. For 181774/181774 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 387818 event pairs, 4951 based on Foata normal form. 22/41095 useless extension candidates. Maximal degree in co-relation 148517. Up to 10850 conditions per place. [2024-10-11 14:36:33,143 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 169 selfloop transitions, 335 changer transitions 0/507 dead transitions. [2024-10-11 14:36:33,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 507 transitions, 9493 flow [2024-10-11 14:36:33,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:36:33,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:36:33,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-10-11 14:36:33,145 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6887755102040817 [2024-10-11 14:36:33,145 INFO L175 Difference]: Start difference. First operand has 200 places, 307 transitions, 5221 flow. Second operand 7 states and 135 transitions. [2024-10-11 14:36:33,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 507 transitions, 9493 flow [2024-10-11 14:36:34,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 507 transitions, 8728 flow, removed 177 selfloop flow, removed 25 redundant places. [2024-10-11 14:36:34,531 INFO L231 Difference]: Finished difference. Result has 182 places, 437 transitions, 8040 flow [2024-10-11 14:36:34,535 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4741, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8040, PETRI_PLACES=182, PETRI_TRANSITIONS=437} [2024-10-11 14:36:34,536 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 155 predicate places. [2024-10-11 14:36:34,536 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 437 transitions, 8040 flow [2024-10-11 14:36:34,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.9375) internal successors, (159), 16 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:36:34,536 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:36:34,536 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:36:34,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-11 14:36:34,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-11 14:36:34,737 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:36:34,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:36:34,738 INFO L85 PathProgramCache]: Analyzing trace with hash -826604279, now seen corresponding path program 15 times [2024-10-11 14:36:34,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:36:34,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615448952] [2024-10-11 14:36:34,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:36:34,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:36:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:36:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:36:35,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:36:35,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615448952] [2024-10-11 14:36:35,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615448952] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:36:35,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467500880] [2024-10-11 14:36:35,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:36:35,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:36:35,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:36:35,656 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:36:35,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-11 14:36:35,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-10-11 14:36:35,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:36:35,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-11 14:36:35,924 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:36:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 31 proven. 55 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 14:36:36,414 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:36:36,467 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:36:36,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-10-11 14:36:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 27 proven. 59 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 14:36:36,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467500880] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:36:36,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:36:36,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 44 [2024-10-11 14:36:36,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566332509] [2024-10-11 14:36:36,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:36:36,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-10-11 14:36:36,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:36:36,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-10-11 14:36:36,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1658, Unknown=0, NotChecked=0, Total=1980 [2024-10-11 14:36:36,965 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:36:36,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 437 transitions, 8040 flow. Second operand has 45 states, 45 states have (on average 7.666666666666667) internal successors, (345), 45 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:36:36,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:36:36,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:36:36,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:36:46,088 INFO L124 PetriNetUnfolderBase]: 25421/44165 cut-off events. [2024-10-11 14:36:46,088 INFO L125 PetriNetUnfolderBase]: For 180286/180286 co-relation queries the response was YES. [2024-10-11 14:36:46,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133579 conditions, 44165 events. 25421/44165 cut-off events. For 180286/180286 co-relation queries the response was YES. Maximal size of possible extension queue 1172. Compared 363463 event pairs, 8115 based on Foata normal form. 814/37979 useless extension candidates. Maximal degree in co-relation 133514. Up to 25248 conditions per place. [2024-10-11 14:36:46,451 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 336 selfloop transitions, 36 changer transitions 357/732 dead transitions. [2024-10-11 14:36:46,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 732 transitions, 9624 flow [2024-10-11 14:36:46,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-11 14:36:46,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-10-11 14:36:46,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 593 transitions. [2024-10-11 14:36:46,453 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5573308270676691 [2024-10-11 14:36:46,453 INFO L175 Difference]: Start difference. First operand has 182 places, 437 transitions, 8040 flow. Second operand 38 states and 593 transitions. [2024-10-11 14:36:46,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 732 transitions, 9624 flow [2024-10-11 14:36:48,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 732 transitions, 9194 flow, removed 211 selfloop flow, removed 2 redundant places. [2024-10-11 14:36:48,031 INFO L231 Difference]: Finished difference. Result has 233 places, 264 transitions, 4607 flow [2024-10-11 14:36:48,031 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5864, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=4607, PETRI_PLACES=233, PETRI_TRANSITIONS=264} [2024-10-11 14:36:48,032 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 206 predicate places. [2024-10-11 14:36:48,032 INFO L471 AbstractCegarLoop]: Abstraction has has 233 places, 264 transitions, 4607 flow [2024-10-11 14:36:48,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 7.666666666666667) internal successors, (345), 45 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:36:48,032 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:36:48,032 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:36:48,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-11 14:36:48,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:36:48,237 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:36:48,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:36:48,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1467000485, now seen corresponding path program 16 times [2024-10-11 14:36:48,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:36:48,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547297403] [2024-10-11 14:36:48,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:36:48,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:36:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:36:48,998 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 30 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:36:48,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:36:48,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547297403] [2024-10-11 14:36:48,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547297403] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:36:48,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753980816] [2024-10-11 14:36:48,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:36:48,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:36:48,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:36:49,000 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:36:49,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-11 14:36:49,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:36:49,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:36:49,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-11 14:36:49,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:36:49,189 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 23 treesize of output 1 [2024-10-11 14:36:49,771 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:36:49,771 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 23 treesize of output 10 [2024-10-11 14:36:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 18 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:36:49,783 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:36:50,573 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 39 treesize of output 35 [2024-10-11 14:36:50,582 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-11 14:36:50,583 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 51 treesize of output 43 [2024-10-11 14:36:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:36:50,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753980816] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:36:50,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:36:50,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 50 [2024-10-11 14:36:50,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482559157] [2024-10-11 14:36:50,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:36:50,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-11 14:36:50,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:36:50,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-11 14:36:50,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=2284, Unknown=0, NotChecked=0, Total=2550 [2024-10-11 14:36:50,864 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:36:50,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 264 transitions, 4607 flow. Second operand has 51 states, 51 states have (on average 7.745098039215686) internal successors, (395), 51 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:36:50,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:36:50,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:36:50,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:36:56,858 INFO L124 PetriNetUnfolderBase]: 16694/28660 cut-off events. [2024-10-11 14:36:56,858 INFO L125 PetriNetUnfolderBase]: For 136310/136310 co-relation queries the response was YES. [2024-10-11 14:36:57,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90890 conditions, 28660 events. 16694/28660 cut-off events. For 136310/136310 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 217721 event pairs, 8115 based on Foata normal form. 1/24202 useless extension candidates. Maximal degree in co-relation 90808. Up to 25248 conditions per place. [2024-10-11 14:36:57,075 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 322 selfloop transitions, 27 changer transitions 129/481 dead transitions. [2024-10-11 14:36:57,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 481 transitions, 6203 flow [2024-10-11 14:36:57,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-11 14:36:57,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-11 14:36:57,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 391 transitions. [2024-10-11 14:36:57,078 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5370879120879121 [2024-10-11 14:36:57,078 INFO L175 Difference]: Start difference. First operand has 233 places, 264 transitions, 4607 flow. Second operand 26 states and 391 transitions. [2024-10-11 14:36:57,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 481 transitions, 6203 flow [2024-10-11 14:36:58,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 481 transitions, 5697 flow, removed 105 selfloop flow, removed 48 redundant places. [2024-10-11 14:36:58,076 INFO L231 Difference]: Finished difference. Result has 183 places, 258 transitions, 4115 flow [2024-10-11 14:36:58,076 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4146, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4115, PETRI_PLACES=183, PETRI_TRANSITIONS=258} [2024-10-11 14:36:58,076 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 156 predicate places. [2024-10-11 14:36:58,076 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 258 transitions, 4115 flow [2024-10-11 14:36:58,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 7.745098039215686) internal successors, (395), 51 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:36:58,077 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:36:58,077 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:36:58,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-11 14:36:58,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:36:58,277 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:36:58,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:36:58,278 INFO L85 PathProgramCache]: Analyzing trace with hash -2124203703, now seen corresponding path program 17 times [2024-10-11 14:36:58,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:36:58,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808803454] [2024-10-11 14:36:58,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:36:58,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:36:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:36:59,240 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 26 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:36:59,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:36:59,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808803454] [2024-10-11 14:36:59,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808803454] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:36:59,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594226581] [2024-10-11 14:36:59,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:36:59,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:36:59,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:36:59,242 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:36:59,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-11 14:36:59,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-11 14:36:59,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:36:59,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-11 14:36:59,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:36:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-11 14:36:59,565 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:36:59,597 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-11 14:36:59,597 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 25 treesize of output 13 [2024-10-11 14:36:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 14:36:59,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594226581] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:36:59,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:36:59,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 11] total 28 [2024-10-11 14:36:59,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57248247] [2024-10-11 14:36:59,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:36:59,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-11 14:36:59,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:36:59,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-11 14:36:59,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2024-10-11 14:36:59,634 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:36:59,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 258 transitions, 4115 flow. Second operand has 29 states, 29 states have (on average 8.206896551724139) internal successors, (238), 29 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:36:59,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:36:59,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:36:59,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:37:04,626 INFO L124 PetriNetUnfolderBase]: 18975/32487 cut-off events. [2024-10-11 14:37:04,626 INFO L125 PetriNetUnfolderBase]: For 140653/140653 co-relation queries the response was YES. [2024-10-11 14:37:04,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101686 conditions, 32487 events. 18975/32487 cut-off events. For 140653/140653 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 241247 event pairs, 2067 based on Foata normal form. 11/27453 useless extension candidates. Maximal degree in co-relation 101626. Up to 5975 conditions per place. [2024-10-11 14:37:04,865 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 101 selfloop transitions, 252 changer transitions 149/505 dead transitions. [2024-10-11 14:37:04,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 505 transitions, 6329 flow [2024-10-11 14:37:04,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-11 14:37:04,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-10-11 14:37:04,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 401 transitions. [2024-10-11 14:37:04,871 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5728571428571428 [2024-10-11 14:37:04,871 INFO L175 Difference]: Start difference. First operand has 183 places, 258 transitions, 4115 flow. Second operand 25 states and 401 transitions. [2024-10-11 14:37:04,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 505 transitions, 6329 flow [2024-10-11 14:37:06,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 505 transitions, 6178 flow, removed 48 selfloop flow, removed 20 redundant places. [2024-10-11 14:37:06,293 INFO L231 Difference]: Finished difference. Result has 191 places, 276 transitions, 5459 flow [2024-10-11 14:37:06,293 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4044, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5459, PETRI_PLACES=191, PETRI_TRANSITIONS=276} [2024-10-11 14:37:06,294 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 164 predicate places. [2024-10-11 14:37:06,294 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 276 transitions, 5459 flow [2024-10-11 14:37:06,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 8.206896551724139) internal successors, (238), 29 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:37:06,294 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:37:06,294 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:37:06,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-11 14:37:06,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:37:06,495 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:37:06,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:37:06,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2103061663, now seen corresponding path program 18 times [2024-10-11 14:37:06,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:37:06,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408189968] [2024-10-11 14:37:06,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:37:06,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:37:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:37:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:37:07,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:37:07,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408189968] [2024-10-11 14:37:07,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408189968] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:37:07,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964089493] [2024-10-11 14:37:07,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:37:07,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:37:07,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:37:07,378 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:37:07,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-11 14:37:07,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-10-11 14:37:07,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:37:07,893 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 14:37:07,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:37:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 58 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-11 14:37:08,256 INFO L311 TraceCheckSpWp]: Computing backward predicates...