./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-prod-cons.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7225a3dc80a635bdf8bc0a0aebf3fff6c385d87e3635c30eb2fdc2ad9b10efb0 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 07:15:05,292 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 07:15:05,347 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 07:15:05,350 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 07:15:05,351 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 07:15:05,372 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 07:15:05,373 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 07:15:05,373 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 07:15:05,374 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 07:15:05,374 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 07:15:05,374 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 07:15:05,375 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 07:15:05,375 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 07:15:05,375 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 07:15:05,376 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 07:15:05,376 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 07:15:05,376 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 07:15:05,376 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 07:15:05,377 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 07:15:05,377 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 07:15:05,377 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 07:15:05,378 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 07:15:05,378 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 07:15:05,382 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 07:15:05,382 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 07:15:05,382 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 07:15:05,382 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 07:15:05,383 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 07:15:05,383 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 07:15:05,383 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 07:15:05,383 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 07:15:05,383 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 07:15:05,383 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:15:05,383 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 07:15:05,384 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 07:15:05,384 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 07:15:05,384 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 07:15:05,384 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 07:15:05,384 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 07:15:05,390 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 07:15:05,391 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 07:15:05,392 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 07:15:05,393 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7225a3dc80a635bdf8bc0a0aebf3fff6c385d87e3635c30eb2fdc2ad9b10efb0 [2024-10-13 07:15:05,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 07:15:05,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 07:15:05,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 07:15:05,640 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 07:15:05,640 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 07:15:05,641 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2024-10-13 07:15:06,902 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 07:15:07,089 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 07:15:07,090 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons.wvr.c [2024-10-13 07:15:07,097 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f6f58584/8df95f7aba634700bad7c004c1023578/FLAG12dbf7635 [2024-10-13 07:15:07,481 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f6f58584/8df95f7aba634700bad7c004c1023578 [2024-10-13 07:15:07,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 07:15:07,484 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 07:15:07,485 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 07:15:07,485 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 07:15:07,493 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 07:15:07,494 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:07" (1/1) ... [2024-10-13 07:15:07,495 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16b7a711 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:07, skipping insertion in model container [2024-10-13 07:15:07,495 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:07" (1/1) ... [2024-10-13 07:15:07,516 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 07:15:07,689 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-prod-cons.wvr.c[3095,3108] [2024-10-13 07:15:07,696 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:15:07,704 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 07:15:07,724 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-prod-cons.wvr.c[3095,3108] [2024-10-13 07:15:07,726 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:15:07,740 INFO L204 MainTranslator]: Completed translation [2024-10-13 07:15:07,741 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:07 WrapperNode [2024-10-13 07:15:07,741 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 07:15:07,742 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 07:15:07,742 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 07:15:07,742 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 07:15:07,748 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:07" (1/1) ... [2024-10-13 07:15:07,753 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:07" (1/1) ... [2024-10-13 07:15:07,774 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 156 [2024-10-13 07:15:07,774 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 07:15:07,775 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 07:15:07,775 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 07:15:07,775 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 07:15:07,784 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:07" (1/1) ... [2024-10-13 07:15:07,784 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:07" (1/1) ... [2024-10-13 07:15:07,791 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:07" (1/1) ... [2024-10-13 07:15:07,818 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-13 07:15:07,818 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:07" (1/1) ... [2024-10-13 07:15:07,818 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:07" (1/1) ... [2024-10-13 07:15:07,825 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:07" (1/1) ... [2024-10-13 07:15:07,831 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:07" (1/1) ... [2024-10-13 07:15:07,833 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:07" (1/1) ... [2024-10-13 07:15:07,834 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:07" (1/1) ... [2024-10-13 07:15:07,836 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 07:15:07,836 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 07:15:07,836 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 07:15:07,837 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 07:15:07,837 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:07" (1/1) ... [2024-10-13 07:15:07,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:15:07,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:07,868 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 07:15:07,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 07:15:07,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 07:15:07,904 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 07:15:07,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 07:15:07,904 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 07:15:07,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 07:15:07,904 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-13 07:15:07,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-13 07:15:07,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 07:15:07,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 07:15:07,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 07:15:07,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 07:15:07,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-13 07:15:07,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-13 07:15:07,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 07:15:07,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 07:15:07,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 07:15:07,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 07:15:07,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 07:15:07,908 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 07:15:07,988 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 07:15:07,991 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 07:15:08,194 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 07:15:08,195 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 07:15:08,348 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 07:15:08,349 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-13 07:15:08,350 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:08 BoogieIcfgContainer [2024-10-13 07:15:08,350 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 07:15:08,351 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 07:15:08,352 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 07:15:08,355 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 07:15:08,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:15:07" (1/3) ... [2024-10-13 07:15:08,356 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fe26b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:08, skipping insertion in model container [2024-10-13 07:15:08,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:07" (2/3) ... [2024-10-13 07:15:08,357 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fe26b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:08, skipping insertion in model container [2024-10-13 07:15:08,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:08" (3/3) ... [2024-10-13 07:15:08,358 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2024-10-13 07:15:08,372 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 07:15:08,372 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 07:15:08,373 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 07:15:08,443 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-13 07:15:08,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 37 transitions, 95 flow [2024-10-13 07:15:08,516 INFO L124 PetriNetUnfolderBase]: 4/34 cut-off events. [2024-10-13 07:15:08,516 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-13 07:15:08,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 34 events. 4/34 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 60 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 28. Up to 2 conditions per place. [2024-10-13 07:15:08,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 37 transitions, 95 flow [2024-10-13 07:15:08,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 33 transitions, 84 flow [2024-10-13 07:15:08,535 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 07:15:08,544 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;@92cee14, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 07:15:08,544 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-13 07:15:08,562 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 07:15:08,562 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2024-10-13 07:15:08,562 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-13 07:15:08,563 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:08,563 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:08,564 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-13 07:15:08,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:08,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1998691310, now seen corresponding path program 1 times [2024-10-13 07:15:08,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:08,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841011969] [2024-10-13 07:15:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:08,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:09,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:09,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841011969] [2024-10-13 07:15:09,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841011969] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:15:09,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:15:09,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 07:15:09,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492802812] [2024-10-13 07:15:09,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:15:09,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 07:15:09,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:09,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 07:15:09,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 07:15:09,179 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-10-13 07:15:09,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:09,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:09,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-10-13 07:15:09,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:09,497 INFO L124 PetriNetUnfolderBase]: 778/1290 cut-off events. [2024-10-13 07:15:09,497 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2024-10-13 07:15:09,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2582 conditions, 1290 events. 778/1290 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6682 event pairs, 296 based on Foata normal form. 2/1249 useless extension candidates. Maximal degree in co-relation 2346. Up to 517 conditions per place. [2024-10-13 07:15:09,509 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 46 selfloop transitions, 4 changer transitions 3/62 dead transitions. [2024-10-13 07:15:09,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 62 transitions, 269 flow [2024-10-13 07:15:09,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:15:09,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:15:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-10-13 07:15:09,522 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-10-13 07:15:09,523 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 84 flow. Second operand 5 states and 115 transitions. [2024-10-13 07:15:09,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 62 transitions, 269 flow [2024-10-13 07:15:09,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 62 transitions, 243 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-13 07:15:09,530 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 96 flow [2024-10-13 07:15:09,531 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-10-13 07:15:09,534 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2024-10-13 07:15:09,534 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 96 flow [2024-10-13 07:15:09,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:09,534 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:09,535 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:09,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 07:15:09,535 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-13 07:15:09,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:09,535 INFO L85 PathProgramCache]: Analyzing trace with hash 832852343, now seen corresponding path program 1 times [2024-10-13 07:15:09,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:09,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583111078] [2024-10-13 07:15:09,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:09,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:09,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:09,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:09,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583111078] [2024-10-13 07:15:09,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583111078] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:15:09,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:15:09,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:15:09,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889764442] [2024-10-13 07:15:09,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:15:09,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:15:09,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:09,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:15:09,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:15:09,595 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-10-13 07:15:09,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:09,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:09,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-10-13 07:15:09,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:09,711 INFO L124 PetriNetUnfolderBase]: 566/1077 cut-off events. [2024-10-13 07:15:09,712 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-10-13 07:15:09,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2077 conditions, 1077 events. 566/1077 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5616 event pairs, 231 based on Foata normal form. 18/1034 useless extension candidates. Maximal degree in co-relation 1223. Up to 614 conditions per place. [2024-10-13 07:15:09,718 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 27 selfloop transitions, 2 changer transitions 7/49 dead transitions. [2024-10-13 07:15:09,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 49 transitions, 201 flow [2024-10-13 07:15:09,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:15:09,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:15:09,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-10-13 07:15:09,721 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7117117117117117 [2024-10-13 07:15:09,721 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 96 flow. Second operand 3 states and 79 transitions. [2024-10-13 07:15:09,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 49 transitions, 201 flow [2024-10-13 07:15:09,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 49 transitions, 197 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 07:15:09,725 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 104 flow [2024-10-13 07:15:09,725 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-10-13 07:15:09,725 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2024-10-13 07:15:09,726 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 104 flow [2024-10-13 07:15:09,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:09,726 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:09,726 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:09,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 07:15:09,726 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-13 07:15:09,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:09,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1617767189, now seen corresponding path program 1 times [2024-10-13 07:15:09,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:09,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953380636] [2024-10-13 07:15:09,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:09,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:09,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:09,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953380636] [2024-10-13 07:15:09,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953380636] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:15:09,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:15:09,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:15:09,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84327103] [2024-10-13 07:15:09,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:15:09,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:15:09,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:09,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:15:09,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:15:09,836 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-10-13 07:15:09,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:09,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:09,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-10-13 07:15:09,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:10,001 INFO L124 PetriNetUnfolderBase]: 679/1306 cut-off events. [2024-10-13 07:15:10,001 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2024-10-13 07:15:10,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2604 conditions, 1306 events. 679/1306 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7777 event pairs, 580 based on Foata normal form. 15/1162 useless extension candidates. Maximal degree in co-relation 1526. Up to 823 conditions per place. [2024-10-13 07:15:10,010 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 22 selfloop transitions, 2 changer transitions 16/53 dead transitions. [2024-10-13 07:15:10,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 53 transitions, 226 flow [2024-10-13 07:15:10,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:15:10,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:15:10,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-10-13 07:15:10,012 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2024-10-13 07:15:10,012 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 104 flow. Second operand 4 states and 96 transitions. [2024-10-13 07:15:10,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 53 transitions, 226 flow [2024-10-13 07:15:10,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 53 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 07:15:10,018 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 116 flow [2024-10-13 07:15:10,019 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-10-13 07:15:10,019 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2024-10-13 07:15:10,019 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 116 flow [2024-10-13 07:15:10,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:10,020 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:10,020 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:10,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 07:15:10,021 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-13 07:15:10,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:10,021 INFO L85 PathProgramCache]: Analyzing trace with hash -450042783, now seen corresponding path program 1 times [2024-10-13 07:15:10,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:10,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902578031] [2024-10-13 07:15:10,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:10,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:10,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:10,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902578031] [2024-10-13 07:15:10,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902578031] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:10,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99244249] [2024-10-13 07:15:10,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:10,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:10,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:10,174 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:10,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 07:15:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:10,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 07:15:10,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:10,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:10,320 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:10,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99244249] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:10,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:10,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 5] total 9 [2024-10-13 07:15:10,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237243514] [2024-10-13 07:15:10,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:10,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 07:15:10,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:10,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 07:15:10,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-10-13 07:15:10,441 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-10-13 07:15:10,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 116 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:10,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:10,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-10-13 07:15:10,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:10,763 INFO L124 PetriNetUnfolderBase]: 1618/2611 cut-off events. [2024-10-13 07:15:10,763 INFO L125 PetriNetUnfolderBase]: For 526/526 co-relation queries the response was YES. [2024-10-13 07:15:10,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5792 conditions, 2611 events. 1618/2611 cut-off events. For 526/526 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 12405 event pairs, 89 based on Foata normal form. 0/2499 useless extension candidates. Maximal degree in co-relation 5776. Up to 486 conditions per place. [2024-10-13 07:15:10,777 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 76 selfloop transitions, 9 changer transitions 8/101 dead transitions. [2024-10-13 07:15:10,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 101 transitions, 477 flow [2024-10-13 07:15:10,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 07:15:10,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 07:15:10,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-10-13 07:15:10,779 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2024-10-13 07:15:10,780 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 116 flow. Second operand 8 states and 168 transitions. [2024-10-13 07:15:10,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 101 transitions, 477 flow [2024-10-13 07:15:10,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 101 transitions, 461 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-10-13 07:15:10,784 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 164 flow [2024-10-13 07:15:10,785 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=164, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2024-10-13 07:15:10,786 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 14 predicate places. [2024-10-13 07:15:10,786 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 164 flow [2024-10-13 07:15:10,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:10,786 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:10,786 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:10,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-13 07:15:10,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:10,991 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-13 07:15:10,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:10,992 INFO L85 PathProgramCache]: Analyzing trace with hash -701652849, now seen corresponding path program 2 times [2024-10-13 07:15:10,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:10,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147938192] [2024-10-13 07:15:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:10,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:11,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:11,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147938192] [2024-10-13 07:15:11,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147938192] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:11,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657656221] [2024-10-13 07:15:11,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:15:11,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:11,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:11,605 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:11,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 07:15:11,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:15:11,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:11,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-13 07:15:11,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:11,740 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 [2024-10-13 07:15:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:12,312 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:12,888 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 40 treesize of output 36 [2024-10-13 07:15:12,902 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:15:12,902 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 50 treesize of output 46 [2024-10-13 07:15:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:13,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657656221] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:13,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:13,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 31 [2024-10-13 07:15:13,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670476245] [2024-10-13 07:15:13,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:13,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-13 07:15:13,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:13,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-13 07:15:13,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2024-10-13 07:15:13,250 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-10-13 07:15:13,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 164 flow. Second operand has 32 states, 32 states have (on average 10.5625) internal successors, (338), 32 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:13,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:13,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-10-13 07:15:13,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:15,551 INFO L124 PetriNetUnfolderBase]: 5468/9059 cut-off events. [2024-10-13 07:15:15,551 INFO L125 PetriNetUnfolderBase]: For 6798/6983 co-relation queries the response was YES. [2024-10-13 07:15:15,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23311 conditions, 9059 events. 5468/9059 cut-off events. For 6798/6983 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 59361 event pairs, 717 based on Foata normal form. 189/8570 useless extension candidates. Maximal degree in co-relation 16017. Up to 2279 conditions per place. [2024-10-13 07:15:15,581 INFO L140 encePairwiseOnDemand]: 22/37 looper letters, 154 selfloop transitions, 56 changer transitions 86/303 dead transitions. [2024-10-13 07:15:15,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 303 transitions, 1677 flow [2024-10-13 07:15:15,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-13 07:15:15,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-10-13 07:15:15,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 497 transitions. [2024-10-13 07:15:15,586 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4974974974974975 [2024-10-13 07:15:15,586 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 164 flow. Second operand 27 states and 497 transitions. [2024-10-13 07:15:15,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 303 transitions, 1677 flow [2024-10-13 07:15:15,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 303 transitions, 1657 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-10-13 07:15:15,613 INFO L231 Difference]: Finished difference. Result has 95 places, 94 transitions, 601 flow [2024-10-13 07:15:15,614 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=601, PETRI_PLACES=95, PETRI_TRANSITIONS=94} [2024-10-13 07:15:15,614 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 56 predicate places. [2024-10-13 07:15:15,615 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 94 transitions, 601 flow [2024-10-13 07:15:15,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 10.5625) internal successors, (338), 32 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:15,615 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:15,615 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:15,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-13 07:15:15,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:15,817 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-13 07:15:15,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:15,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1869356829, now seen corresponding path program 3 times [2024-10-13 07:15:15,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:15,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231681078] [2024-10-13 07:15:15,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:15,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:16,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:16,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231681078] [2024-10-13 07:15:16,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231681078] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:16,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002088982] [2024-10-13 07:15:16,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:15:16,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:16,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:16,560 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:16,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 07:15:16,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 07:15:16,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:16,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-13 07:15:16,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:16,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:17,008 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:15:17,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-10-13 07:15:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:15:17,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002088982] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:17,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:17,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2024-10-13 07:15:17,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763792925] [2024-10-13 07:15:17,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:17,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-13 07:15:17,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:17,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-13 07:15:17,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-10-13 07:15:17,362 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-10-13 07:15:17,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 94 transitions, 601 flow. Second operand has 30 states, 30 states have (on average 10.8) internal successors, (324), 30 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:17,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:17,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-10-13 07:15:17,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:19,190 INFO L124 PetriNetUnfolderBase]: 2877/4873 cut-off events. [2024-10-13 07:15:19,190 INFO L125 PetriNetUnfolderBase]: For 14272/14526 co-relation queries the response was YES. [2024-10-13 07:15:19,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17732 conditions, 4873 events. 2877/4873 cut-off events. For 14272/14526 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 28380 event pairs, 165 based on Foata normal form. 272/5095 useless extension candidates. Maximal degree in co-relation 16143. Up to 868 conditions per place. [2024-10-13 07:15:19,220 INFO L140 encePairwiseOnDemand]: 23/37 looper letters, 219 selfloop transitions, 106 changer transitions 56/388 dead transitions. [2024-10-13 07:15:19,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 388 transitions, 2781 flow [2024-10-13 07:15:19,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-13 07:15:19,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-10-13 07:15:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 591 transitions. [2024-10-13 07:15:19,222 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4436936936936937 [2024-10-13 07:15:19,222 INFO L175 Difference]: Start difference. First operand has 95 places, 94 transitions, 601 flow. Second operand 36 states and 591 transitions. [2024-10-13 07:15:19,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 388 transitions, 2781 flow [2024-10-13 07:15:19,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 388 transitions, 2633 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-10-13 07:15:19,277 INFO L231 Difference]: Finished difference. Result has 139 places, 152 transitions, 1281 flow [2024-10-13 07:15:19,277 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1281, PETRI_PLACES=139, PETRI_TRANSITIONS=152} [2024-10-13 07:15:19,278 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 100 predicate places. [2024-10-13 07:15:19,278 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 152 transitions, 1281 flow [2024-10-13 07:15:19,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 10.8) internal successors, (324), 30 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:19,279 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:19,279 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:19,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 07:15:19,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:19,480 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-13 07:15:19,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:19,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1011252776, now seen corresponding path program 4 times [2024-10-13 07:15:19,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:19,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769742565] [2024-10-13 07:15:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:19,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:19,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:19,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769742565] [2024-10-13 07:15:19,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769742565] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:19,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201582647] [2024-10-13 07:15:19,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:15:19,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:19,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:19,575 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:19,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 07:15:19,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:15:19,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:19,648 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 07:15:19,649 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:19,686 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:19,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201582647] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:19,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:19,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2024-10-13 07:15:19,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251544862] [2024-10-13 07:15:19,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:19,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 07:15:19,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:19,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 07:15:19,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-13 07:15:19,803 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-10-13 07:15:19,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 152 transitions, 1281 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:19,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:19,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-10-13 07:15:19,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:20,360 INFO L124 PetriNetUnfolderBase]: 2641/5321 cut-off events. [2024-10-13 07:15:20,361 INFO L125 PetriNetUnfolderBase]: For 42282/42642 co-relation queries the response was YES. [2024-10-13 07:15:20,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23737 conditions, 5321 events. 2641/5321 cut-off events. For 42282/42642 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 37495 event pairs, 558 based on Foata normal form. 293/5403 useless extension candidates. Maximal degree in co-relation 22511. Up to 1469 conditions per place. [2024-10-13 07:15:20,404 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 134 selfloop transitions, 20 changer transitions 20/246 dead transitions. [2024-10-13 07:15:20,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 246 transitions, 2391 flow [2024-10-13 07:15:20,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:15:20,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:15:20,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-10-13 07:15:20,471 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7567567567567568 [2024-10-13 07:15:20,471 INFO L175 Difference]: Start difference. First operand has 139 places, 152 transitions, 1281 flow. Second operand 4 states and 112 transitions. [2024-10-13 07:15:20,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 246 transitions, 2391 flow [2024-10-13 07:15:20,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 246 transitions, 2091 flow, removed 92 selfloop flow, removed 8 redundant places. [2024-10-13 07:15:20,666 INFO L231 Difference]: Finished difference. Result has 136 places, 168 transitions, 1324 flow [2024-10-13 07:15:20,667 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1324, PETRI_PLACES=136, PETRI_TRANSITIONS=168} [2024-10-13 07:15:20,667 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 97 predicate places. [2024-10-13 07:15:20,667 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 168 transitions, 1324 flow [2024-10-13 07:15:20,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:20,667 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:20,668 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:20,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 07:15:20,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:20,868 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-13 07:15:20,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:20,869 INFO L85 PathProgramCache]: Analyzing trace with hash 2026861978, now seen corresponding path program 5 times [2024-10-13 07:15:20,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:20,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949938759] [2024-10-13 07:15:20,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:20,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:15:20,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:20,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949938759] [2024-10-13 07:15:20,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949938759] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:20,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159212559] [2024-10-13 07:15:20,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:15:20,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:20,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:20,969 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:20,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 07:15:21,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-13 07:15:21,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:21,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-13 07:15:21,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:15:21,087 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:15:21,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159212559] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:21,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:21,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-13 07:15:21,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071729121] [2024-10-13 07:15:21,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:21,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-13 07:15:21,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:21,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-13 07:15:21,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-10-13 07:15:21,140 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-10-13 07:15:21,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 168 transitions, 1324 flow. Second operand has 12 states, 12 states have (on average 17.083333333333332) internal successors, (205), 12 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:21,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:21,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-10-13 07:15:21,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:21,625 INFO L124 PetriNetUnfolderBase]: 2106/4367 cut-off events. [2024-10-13 07:15:21,625 INFO L125 PetriNetUnfolderBase]: For 31106/31506 co-relation queries the response was YES. [2024-10-13 07:15:21,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19101 conditions, 4367 events. 2106/4367 cut-off events. For 31106/31506 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 29660 event pairs, 1223 based on Foata normal form. 169/4329 useless extension candidates. Maximal degree in co-relation 18090. Up to 2797 conditions per place. [2024-10-13 07:15:21,657 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 66 selfloop transitions, 3 changer transitions 39/160 dead transitions. [2024-10-13 07:15:21,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 160 transitions, 1383 flow [2024-10-13 07:15:21,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:15:21,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:15:21,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-10-13 07:15:21,658 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5855855855855856 [2024-10-13 07:15:21,659 INFO L175 Difference]: Start difference. First operand has 136 places, 168 transitions, 1324 flow. Second operand 6 states and 130 transitions. [2024-10-13 07:15:21,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 160 transitions, 1383 flow [2024-10-13 07:15:21,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 160 transitions, 1351 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-10-13 07:15:21,854 INFO L231 Difference]: Finished difference. Result has 137 places, 121 transitions, 924 flow [2024-10-13 07:15:21,854 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=924, PETRI_PLACES=137, PETRI_TRANSITIONS=121} [2024-10-13 07:15:21,855 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 98 predicate places. [2024-10-13 07:15:21,855 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 121 transitions, 924 flow [2024-10-13 07:15:21,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.083333333333332) internal successors, (205), 12 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:21,856 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:21,856 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:21,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 07:15:22,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:22,060 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-13 07:15:22,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:22,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1765952700, now seen corresponding path program 6 times [2024-10-13 07:15:22,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:22,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871840749] [2024-10-13 07:15:22,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:22,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:23,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:23,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871840749] [2024-10-13 07:15:23,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871840749] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:23,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165276171] [2024-10-13 07:15:23,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:15:23,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:23,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:23,158 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:23,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 07:15:23,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-13 07:15:23,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:23,228 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-13 07:15:23,231 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:23,284 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 [2024-10-13 07:15:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:23,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:24,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 69 [2024-10-13 07:15:24,599 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:15:24,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 142 treesize of output 139 [2024-10-13 07:15:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:25,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165276171] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:25,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:25,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2024-10-13 07:15:25,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921236343] [2024-10-13 07:15:25,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:25,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-13 07:15:25,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:25,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-13 07:15:25,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2024-10-13 07:15:25,358 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-10-13 07:15:25,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 121 transitions, 924 flow. Second operand has 43 states, 43 states have (on average 13.162790697674419) internal successors, (566), 43 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:25,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:25,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-10-13 07:15:25,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:31,777 INFO L124 PetriNetUnfolderBase]: 9412/16637 cut-off events. [2024-10-13 07:15:31,777 INFO L125 PetriNetUnfolderBase]: For 76990/77454 co-relation queries the response was YES. [2024-10-13 07:15:31,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69890 conditions, 16637 events. 9412/16637 cut-off events. For 76990/77454 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 123346 event pairs, 1334 based on Foata normal form. 368/16619 useless extension candidates. Maximal degree in co-relation 69833. Up to 3665 conditions per place. [2024-10-13 07:15:31,917 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 448 selfloop transitions, 234 changer transitions 169/870 dead transitions. [2024-10-13 07:15:31,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 870 transitions, 7332 flow [2024-10-13 07:15:31,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-10-13 07:15:31,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2024-10-13 07:15:31,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 1475 transitions. [2024-10-13 07:15:31,922 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.511088011088011 [2024-10-13 07:15:31,923 INFO L175 Difference]: Start difference. First operand has 137 places, 121 transitions, 924 flow. Second operand 78 states and 1475 transitions. [2024-10-13 07:15:31,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 870 transitions, 7332 flow [2024-10-13 07:15:32,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 870 transitions, 6751 flow, removed 200 selfloop flow, removed 13 redundant places. [2024-10-13 07:15:32,802 INFO L231 Difference]: Finished difference. Result has 221 places, 327 transitions, 3513 flow [2024-10-13 07:15:32,803 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=3513, PETRI_PLACES=221, PETRI_TRANSITIONS=327} [2024-10-13 07:15:32,803 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 182 predicate places. [2024-10-13 07:15:32,803 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 327 transitions, 3513 flow [2024-10-13 07:15:32,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 13.162790697674419) internal successors, (566), 43 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:32,805 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:32,806 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:32,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-13 07:15:33,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:33,007 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-13 07:15:33,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:33,008 INFO L85 PathProgramCache]: Analyzing trace with hash -2067970736, now seen corresponding path program 7 times [2024-10-13 07:15:33,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:33,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120291121] [2024-10-13 07:15:33,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:33,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:33,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:33,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120291121] [2024-10-13 07:15:33,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120291121] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:33,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301719902] [2024-10-13 07:15:33,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:15:33,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:33,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:33,913 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:33,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 07:15:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:33,984 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-13 07:15:33,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:34,467 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-10-13 07:15:34,467 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 35 treesize of output 13 [2024-10-13 07:15:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:34,544 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:34,939 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-10-13 07:15:34,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 45 [2024-10-13 07:15:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:35,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301719902] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:35,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:35,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2024-10-13 07:15:35,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811674892] [2024-10-13 07:15:35,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:35,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-13 07:15:35,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:35,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-13 07:15:35,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1577, Unknown=0, NotChecked=0, Total=1806 [2024-10-13 07:15:35,697 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-10-13 07:15:35,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 327 transitions, 3513 flow. Second operand has 43 states, 43 states have (on average 13.116279069767442) internal successors, (564), 43 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:35,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:35,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-10-13 07:15:35,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:56,283 INFO L124 PetriNetUnfolderBase]: 30914/53711 cut-off events. [2024-10-13 07:15:56,283 INFO L125 PetriNetUnfolderBase]: For 758306/759727 co-relation queries the response was YES. [2024-10-13 07:15:57,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303603 conditions, 53711 events. 30914/53711 cut-off events. For 758306/759727 co-relation queries the response was YES. Maximal size of possible extension queue 1827. Compared 468251 event pairs, 3112 based on Foata normal form. 990/53732 useless extension candidates. Maximal degree in co-relation 291667. Up to 10322 conditions per place. [2024-10-13 07:15:57,162 INFO L140 encePairwiseOnDemand]: 22/37 looper letters, 915 selfloop transitions, 1059 changer transitions 532/2525 dead transitions. [2024-10-13 07:15:57,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 2525 transitions, 30450 flow [2024-10-13 07:15:57,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2024-10-13 07:15:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2024-10-13 07:15:57,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 3156 transitions. [2024-10-13 07:15:57,169 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5232963024374068 [2024-10-13 07:15:57,169 INFO L175 Difference]: Start difference. First operand has 221 places, 327 transitions, 3513 flow. Second operand 163 states and 3156 transitions. [2024-10-13 07:15:57,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 2525 transitions, 30450 flow [2024-10-13 07:16:11,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 2525 transitions, 28282 flow, removed 727 selfloop flow, removed 15 redundant places. [2024-10-13 07:16:11,769 INFO L231 Difference]: Finished difference. Result has 420 places, 1306 transitions, 19615 flow [2024-10-13 07:16:11,769 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2892, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=163, PETRI_FLOW=19615, PETRI_PLACES=420, PETRI_TRANSITIONS=1306} [2024-10-13 07:16:11,770 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 381 predicate places. [2024-10-13 07:16:11,770 INFO L471 AbstractCegarLoop]: Abstraction has has 420 places, 1306 transitions, 19615 flow [2024-10-13 07:16:11,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 13.116279069767442) internal successors, (564), 43 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:16:11,771 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:16:11,771 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:16:11,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-13 07:16:11,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:11,972 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-13 07:16:11,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:16:11,972 INFO L85 PathProgramCache]: Analyzing trace with hash 238034150, now seen corresponding path program 8 times [2024-10-13 07:16:11,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:16:11,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624831562] [2024-10-13 07:16:11,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:16:11,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:16:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:16:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:12,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:16:12,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624831562] [2024-10-13 07:16:12,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624831562] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:16:12,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209479999] [2024-10-13 07:16:12,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:16:12,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:16:12,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:16:12,711 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:16:12,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 07:16:12,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:16:12,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:16:12,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-13 07:16:12,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:16:13,211 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-10-13 07:16:13,212 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 35 treesize of output 13 [2024-10-13 07:16:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:13,287 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:16:13,653 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-10-13 07:16:13,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 45 [2024-10-13 07:16:14,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:16:14,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209479999] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:16:14,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:16:14,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2024-10-13 07:16:14,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075952719] [2024-10-13 07:16:14,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:16:14,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-13 07:16:14,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:16:14,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-13 07:16:14,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2024-10-13 07:16:14,320 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-10-13 07:16:14,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 1306 transitions, 19615 flow. Second operand has 43 states, 43 states have (on average 13.069767441860465) internal successors, (562), 43 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:16:14,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:16:14,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-10-13 07:16:14,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand