./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-more-buffer-series2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 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-more-buffer-series2.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 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 09:42:09,523 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 09:42:09,617 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-20 09:42:09,622 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 09:42:09,623 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 09:42:09,655 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 09:42:09,655 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 09:42:09,656 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 09:42:09,657 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 09:42:09,658 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 09:42:09,659 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 09:42:09,659 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 09:42:09,659 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 09:42:09,661 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 09:42:09,662 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 09:42:09,662 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 09:42:09,662 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-20 09:42:09,662 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 09:42:09,663 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 09:42:09,663 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 09:42:09,663 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 09:42:09,664 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-20 09:42:09,667 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 09:42:09,667 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-20 09:42:09,667 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 09:42:09,668 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 09:42:09,668 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-20 09:42:09,668 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 09:42:09,668 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 09:42:09,668 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 09:42:09,669 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 09:42:09,669 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 09:42:09,669 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:42:09,669 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 09:42:09,669 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 09:42:09,670 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-20 09:42:09,670 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 09:42:09,670 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 09:42:09,671 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 09:42:09,671 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 09:42:09,671 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 09:42:09,672 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 09:42:09,672 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 [2024-11-20 09:42:09,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 09:42:09,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 09:42:09,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 09:42:10,000 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 09:42:10,001 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 09:42:10,003 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2024-11-20 09:42:11,551 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 09:42:11,756 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 09:42:11,757 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2024-11-20 09:42:11,769 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6b4fd51f/fa6725e06d514367960d8b62525ac73e/FLAG9def3258c [2024-11-20 09:42:11,783 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6b4fd51f/fa6725e06d514367960d8b62525ac73e [2024-11-20 09:42:11,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 09:42:11,787 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 09:42:11,788 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 09:42:11,788 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 09:42:11,792 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 09:42:11,793 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:42:11" (1/1) ... [2024-11-20 09:42:11,794 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@217137ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:42:11, skipping insertion in model container [2024-11-20 09:42:11,794 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:42:11" (1/1) ... [2024-11-20 09:42:11,820 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 09:42:12,077 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4284,4297] [2024-11-20 09:42:12,097 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:42:12,111 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 09:42:12,156 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c[4284,4297] [2024-11-20 09:42:12,162 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:42:12,194 INFO L204 MainTranslator]: Completed translation [2024-11-20 09:42:12,196 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:42:12 WrapperNode [2024-11-20 09:42:12,196 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 09:42:12,197 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 09:42:12,198 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 09:42:12,198 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 09:42:12,207 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:42:12" (1/1) ... [2024-11-20 09:42:12,217 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:42:12" (1/1) ... [2024-11-20 09:42:12,251 INFO L138 Inliner]: procedures = 26, calls = 63, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 336 [2024-11-20 09:42:12,251 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 09:42:12,252 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 09:42:12,252 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 09:42:12,253 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 09:42:12,270 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:42:12" (1/1) ... [2024-11-20 09:42:12,271 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:42:12" (1/1) ... [2024-11-20 09:42:12,276 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:42:12" (1/1) ... [2024-11-20 09:42:12,313 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-20 09:42:12,317 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:42:12" (1/1) ... [2024-11-20 09:42:12,318 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:42:12" (1/1) ... [2024-11-20 09:42:12,331 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:42:12" (1/1) ... [2024-11-20 09:42:12,342 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:42:12" (1/1) ... [2024-11-20 09:42:12,347 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:42:12" (1/1) ... [2024-11-20 09:42:12,349 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:42:12" (1/1) ... [2024-11-20 09:42:12,355 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 09:42:12,356 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 09:42:12,357 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 09:42:12,357 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 09:42:12,358 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:42:12" (1/1) ... [2024-11-20 09:42:12,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:42:12,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:42:12,395 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-20 09:42:12,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-20 09:42:12,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 09:42:12,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 09:42:12,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 09:42:12,460 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 09:42:12,460 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 09:42:12,460 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 09:42:12,460 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 09:42:12,461 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 09:42:12,461 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 09:42:12,461 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-20 09:42:12,461 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-20 09:42:12,461 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-20 09:42:12,461 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-20 09:42:12,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 09:42:12,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 09:42:12,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-20 09:42:12,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-20 09:42:12,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 09:42:12,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 09:42:12,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 09:42:12,468 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 09:42:12,618 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 09:42:12,621 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 09:42:13,199 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 09:42:13,199 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 09:42:13,573 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 09:42:13,573 INFO L316 CfgBuilder]: Removed 7 assume(true) statements. [2024-11-20 09:42:13,574 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:42:13 BoogieIcfgContainer [2024-11-20 09:42:13,574 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 09:42:13,577 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 09:42:13,577 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 09:42:13,580 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 09:42:13,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:42:11" (1/3) ... [2024-11-20 09:42:13,582 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1568ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:42:13, skipping insertion in model container [2024-11-20 09:42:13,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:42:12" (2/3) ... [2024-11-20 09:42:13,582 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1568ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:42:13, skipping insertion in model container [2024-11-20 09:42:13,583 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:42:13" (3/3) ... [2024-11-20 09:42:13,584 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2024-11-20 09:42:13,604 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 09:42:13,604 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-20 09:42:13,604 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 09:42:13,679 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-20 09:42:13,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 50 transitions, 128 flow [2024-11-20 09:42:13,763 INFO L124 PetriNetUnfolderBase]: 7/46 cut-off events. [2024-11-20 09:42:13,763 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-20 09:42:13,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 46 events. 7/46 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 69 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2024-11-20 09:42:13,770 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 50 transitions, 128 flow [2024-11-20 09:42:13,774 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 45 transitions, 114 flow [2024-11-20 09:42:13,789 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:42:13,797 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;@2e52b62f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:42:13,798 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-20 09:42:13,816 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:42:13,817 INFO L124 PetriNetUnfolderBase]: 7/44 cut-off events. [2024-11-20 09:42:13,817 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-20 09:42:13,817 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:42:13,818 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] [2024-11-20 09:42:13,819 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 2 more)] === [2024-11-20 09:42:13,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:42:13,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2021043820, now seen corresponding path program 1 times [2024-11-20 09:42:13,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:42:13,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31916573] [2024-11-20 09:42:13,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:42:13,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:42:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:42:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:42:14,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:42:14,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31916573] [2024-11-20 09:42:14,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31916573] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:42:14,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:42:14,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 09:42:14,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953205528] [2024-11-20 09:42:14,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:42:14,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 09:42:14,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:42:14,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 09:42:14,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 09:42:14,278 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-11-20 09:42:14,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:14,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:42:14,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-11-20 09:42:14,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:42:14,773 INFO L124 PetriNetUnfolderBase]: 1030/1754 cut-off events. [2024-11-20 09:42:14,774 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2024-11-20 09:42:14,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3311 conditions, 1754 events. 1030/1754 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 10488 event pairs, 252 based on Foata normal form. 1/1665 useless extension candidates. Maximal degree in co-relation 2793. Up to 989 conditions per place. [2024-11-20 09:42:14,802 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 39 selfloop transitions, 3 changer transitions 1/60 dead transitions. [2024-11-20 09:42:14,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 60 transitions, 245 flow [2024-11-20 09:42:14,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 09:42:14,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 09:42:14,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-11-20 09:42:14,816 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7133333333333334 [2024-11-20 09:42:14,818 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 114 flow. Second operand 3 states and 107 transitions. [2024-11-20 09:42:14,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 60 transitions, 245 flow [2024-11-20 09:42:14,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 219 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-20 09:42:14,832 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 117 flow [2024-11-20 09:42:14,836 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2024-11-20 09:42:14,842 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2024-11-20 09:42:14,842 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 117 flow [2024-11-20 09:42:14,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:14,843 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:42:14,844 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, 1] [2024-11-20 09:42:14,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 09:42:14,844 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 2 more)] === [2024-11-20 09:42:14,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:42:14,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1903436439, now seen corresponding path program 1 times [2024-11-20 09:42:14,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:42:14,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826309566] [2024-11-20 09:42:14,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:42:14,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:42:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:42:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:42:15,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:42:15,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826309566] [2024-11-20 09:42:15,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826309566] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:42:15,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:42:15,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 09:42:15,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739868048] [2024-11-20 09:42:15,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:42:15,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 09:42:15,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:42:15,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 09:42:15,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 09:42:15,069 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-11-20 09:42:15,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:15,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:42:15,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-11-20 09:42:15,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:42:15,369 INFO L124 PetriNetUnfolderBase]: 1204/1956 cut-off events. [2024-11-20 09:42:15,369 INFO L125 PetriNetUnfolderBase]: For 376/376 co-relation queries the response was YES. [2024-11-20 09:42:15,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4088 conditions, 1956 events. 1204/1956 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 11296 event pairs, 362 based on Foata normal form. 64/1928 useless extension candidates. Maximal degree in co-relation 1456. Up to 1131 conditions per place. [2024-11-20 09:42:15,390 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 48 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2024-11-20 09:42:15,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 271 flow [2024-11-20 09:42:15,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 09:42:15,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 09:42:15,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2024-11-20 09:42:15,395 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.74 [2024-11-20 09:42:15,396 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 117 flow. Second operand 3 states and 111 transitions. [2024-11-20 09:42:15,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 271 flow [2024-11-20 09:42:15,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 267 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:42:15,399 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 128 flow [2024-11-20 09:42:15,399 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2024-11-20 09:42:15,399 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2024-11-20 09:42:15,400 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 128 flow [2024-11-20 09:42:15,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:15,400 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:42:15,400 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, 1] [2024-11-20 09:42:15,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 09:42:15,400 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 2 more)] === [2024-11-20 09:42:15,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:42:15,403 INFO L85 PathProgramCache]: Analyzing trace with hash 764626461, now seen corresponding path program 1 times [2024-11-20 09:42:15,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:42:15,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082921154] [2024-11-20 09:42:15,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:42:15,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:42:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:42:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:42:15,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:42:15,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082921154] [2024-11-20 09:42:15,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082921154] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:42:15,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:42:15,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 09:42:15,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764763072] [2024-11-20 09:42:15,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:42:15,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 09:42:15,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:42:15,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 09:42:15,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 09:42:15,568 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-11-20 09:42:15,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:15,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:42:15,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-11-20 09:42:15,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:42:15,893 INFO L124 PetriNetUnfolderBase]: 1425/2334 cut-off events. [2024-11-20 09:42:15,893 INFO L125 PetriNetUnfolderBase]: For 866/866 co-relation queries the response was YES. [2024-11-20 09:42:15,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5057 conditions, 2334 events. 1425/2334 cut-off events. For 866/866 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13350 event pairs, 399 based on Foata normal form. 33/2273 useless extension candidates. Maximal degree in co-relation 3352. Up to 1290 conditions per place. [2024-11-20 09:42:15,909 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 48 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2024-11-20 09:42:15,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 67 transitions, 287 flow [2024-11-20 09:42:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 09:42:15,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 09:42:15,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2024-11-20 09:42:15,913 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7266666666666667 [2024-11-20 09:42:15,913 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 128 flow. Second operand 3 states and 109 transitions. [2024-11-20 09:42:15,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 67 transitions, 287 flow [2024-11-20 09:42:15,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 67 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:42:15,917 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 140 flow [2024-11-20 09:42:15,918 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-11-20 09:42:15,919 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2024-11-20 09:42:15,919 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 140 flow [2024-11-20 09:42:15,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:15,920 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:42:15,920 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, 1, 1, 1, 1] [2024-11-20 09:42:15,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 09:42:15,921 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 2 more)] === [2024-11-20 09:42:15,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:42:15,922 INFO L85 PathProgramCache]: Analyzing trace with hash -673420964, now seen corresponding path program 1 times [2024-11-20 09:42:15,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:42:15,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548040954] [2024-11-20 09:42:15,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:42:15,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:42:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:42:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:42:16,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:42:16,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548040954] [2024-11-20 09:42:16,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548040954] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:42:16,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:42:16,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 09:42:16,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606555650] [2024-11-20 09:42:16,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:42:16,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:42:16,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:42:16,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:42:16,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:42:16,119 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-11-20 09:42:16,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:16,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:42:16,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-11-20 09:42:16,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:42:16,523 INFO L124 PetriNetUnfolderBase]: 1783/2862 cut-off events. [2024-11-20 09:42:16,523 INFO L125 PetriNetUnfolderBase]: For 1450/1450 co-relation queries the response was YES. [2024-11-20 09:42:16,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6695 conditions, 2862 events. 1783/2862 cut-off events. For 1450/1450 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17778 event pairs, 1276 based on Foata normal form. 72/2653 useless extension candidates. Maximal degree in co-relation 3442. Up to 1897 conditions per place. [2024-11-20 09:42:16,546 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 56 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2024-11-20 09:42:16,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 351 flow [2024-11-20 09:42:16,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:42:16,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:42:16,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-11-20 09:42:16,548 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.652 [2024-11-20 09:42:16,548 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 140 flow. Second operand 5 states and 163 transitions. [2024-11-20 09:42:16,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 351 flow [2024-11-20 09:42:16,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:42:16,553 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 190 flow [2024-11-20 09:42:16,554 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2024-11-20 09:42:16,554 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2024-11-20 09:42:16,555 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 190 flow [2024-11-20 09:42:16,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:16,556 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:42:16,556 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, 1, 1, 1, 1] [2024-11-20 09:42:16,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 09:42:16,557 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 2 more)] === [2024-11-20 09:42:16,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:42:16,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1409691762, now seen corresponding path program 1 times [2024-11-20 09:42:16,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:42:16,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016713486] [2024-11-20 09:42:16,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:42:16,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:42:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:42:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:42:16,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:42:16,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016713486] [2024-11-20 09:42:16,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016713486] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:42:16,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:42:16,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:42:16,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476368071] [2024-11-20 09:42:16,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:42:16,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:42:16,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:42:16,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:42:16,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:42:16,744 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 50 [2024-11-20 09:42:16,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:16,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:42:16,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 50 [2024-11-20 09:42:16,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:42:17,217 INFO L124 PetriNetUnfolderBase]: 2317/3858 cut-off events. [2024-11-20 09:42:17,219 INFO L125 PetriNetUnfolderBase]: For 1970/1970 co-relation queries the response was YES. [2024-11-20 09:42:17,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8793 conditions, 3858 events. 2317/3858 cut-off events. For 1970/1970 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 26147 event pairs, 1724 based on Foata normal form. 106/3605 useless extension candidates. Maximal degree in co-relation 6840. Up to 2491 conditions per place. [2024-11-20 09:42:17,252 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 58 selfloop transitions, 5 changer transitions 2/82 dead transitions. [2024-11-20 09:42:17,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 82 transitions, 414 flow [2024-11-20 09:42:17,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:42:17,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:42:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-11-20 09:42:17,254 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-11-20 09:42:17,254 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 190 flow. Second operand 4 states and 136 transitions. [2024-11-20 09:42:17,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 82 transitions, 414 flow [2024-11-20 09:42:17,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 82 transitions, 410 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-20 09:42:17,260 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 216 flow [2024-11-20 09:42:17,261 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-11-20 09:42:17,261 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2024-11-20 09:42:17,262 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 216 flow [2024-11-20 09:42:17,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:17,262 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:42:17,262 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, 1, 1, 1, 1, 1] [2024-11-20 09:42:17,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 09:42:17,262 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 2 more)] === [2024-11-20 09:42:17,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:42:17,263 INFO L85 PathProgramCache]: Analyzing trace with hash 354292929, now seen corresponding path program 1 times [2024-11-20 09:42:17,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:42:17,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338513147] [2024-11-20 09:42:17,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:42:17,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:42:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:42:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:42:17,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:42:17,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338513147] [2024-11-20 09:42:17,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338513147] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:42:17,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:42:17,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:42:17,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965685218] [2024-11-20 09:42:17,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:42:17,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 09:42:17,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:42:17,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 09:42:17,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-20 09:42:17,633 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-11-20 09:42:17,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 216 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:17,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:42:17,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-11-20 09:42:17,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:42:18,793 INFO L124 PetriNetUnfolderBase]: 6369/9864 cut-off events. [2024-11-20 09:42:18,793 INFO L125 PetriNetUnfolderBase]: For 4584/4712 co-relation queries the response was YES. [2024-11-20 09:42:18,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22780 conditions, 9864 events. 6369/9864 cut-off events. For 4584/4712 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 69801 event pairs, 2485 based on Foata normal form. 16/8921 useless extension candidates. Maximal degree in co-relation 18038. Up to 3399 conditions per place. [2024-11-20 09:42:18,847 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 89 selfloop transitions, 9 changer transitions 1/113 dead transitions. [2024-11-20 09:42:18,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 113 transitions, 593 flow [2024-11-20 09:42:18,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:42:18,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:42:18,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-11-20 09:42:18,848 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6366666666666667 [2024-11-20 09:42:18,849 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 216 flow. Second operand 6 states and 191 transitions. [2024-11-20 09:42:18,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 113 transitions, 593 flow [2024-11-20 09:42:18,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 113 transitions, 583 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-20 09:42:18,852 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 245 flow [2024-11-20 09:42:18,852 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=245, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2024-11-20 09:42:18,853 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2024-11-20 09:42:18,853 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 245 flow [2024-11-20 09:42:18,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:18,854 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:42:18,854 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, 1, 1, 1, 1, 1] [2024-11-20 09:42:18,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 09:42:18,854 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 2 more)] === [2024-11-20 09:42:18,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:42:18,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1470062564, now seen corresponding path program 1 times [2024-11-20 09:42:18,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:42:18,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811845525] [2024-11-20 09:42:18,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:42:18,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:42:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:42:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:42:19,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:42:19,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811845525] [2024-11-20 09:42:19,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811845525] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:42:19,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:42:19,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:42:19,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854861249] [2024-11-20 09:42:19,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:42:19,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 09:42:19,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:42:19,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 09:42:19,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-20 09:42:19,140 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-11-20 09:42:19,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 245 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:19,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:42:19,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-11-20 09:42:19,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:42:20,133 INFO L124 PetriNetUnfolderBase]: 4709/7536 cut-off events. [2024-11-20 09:42:20,133 INFO L125 PetriNetUnfolderBase]: For 3991/4129 co-relation queries the response was YES. [2024-11-20 09:42:20,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17450 conditions, 7536 events. 4709/7536 cut-off events. For 3991/4129 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 52438 event pairs, 2035 based on Foata normal form. 6/6666 useless extension candidates. Maximal degree in co-relation 13639. Up to 3217 conditions per place. [2024-11-20 09:42:20,186 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 57 selfloop transitions, 7 changer transitions 29/107 dead transitions. [2024-11-20 09:42:20,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 107 transitions, 561 flow [2024-11-20 09:42:20,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:42:20,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:42:20,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-11-20 09:42:20,189 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-11-20 09:42:20,189 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 245 flow. Second operand 6 states and 189 transitions. [2024-11-20 09:42:20,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 107 transitions, 561 flow [2024-11-20 09:42:20,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 107 transitions, 551 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-20 09:42:20,194 INFO L231 Difference]: Finished difference. Result has 72 places, 57 transitions, 241 flow [2024-11-20 09:42:20,194 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2024-11-20 09:42:20,195 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 21 predicate places. [2024-11-20 09:42:20,195 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 241 flow [2024-11-20 09:42:20,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:20,196 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:42:20,196 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, 1, 1, 1, 1, 1, 1] [2024-11-20 09:42:20,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 09:42:20,197 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 2 more)] === [2024-11-20 09:42:20,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:42:20,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1298718439, now seen corresponding path program 1 times [2024-11-20 09:42:20,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:42:20,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592953931] [2024-11-20 09:42:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:42:20,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:42:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:42:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:42:20,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:42:20,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592953931] [2024-11-20 09:42:20,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592953931] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:42:20,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:42:20,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:42:20,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098366286] [2024-11-20 09:42:20,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:42:20,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 09:42:20,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:42:20,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 09:42:20,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-20 09:42:20,617 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-11-20 09:42:20,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 57 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:20,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:42:20,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-11-20 09:42:20,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:42:21,215 INFO L124 PetriNetUnfolderBase]: 2851/4744 cut-off events. [2024-11-20 09:42:21,215 INFO L125 PetriNetUnfolderBase]: For 3236/3236 co-relation queries the response was YES. [2024-11-20 09:42:21,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11628 conditions, 4744 events. 2851/4744 cut-off events. For 3236/3236 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 31184 event pairs, 449 based on Foata normal form. 248/4887 useless extension candidates. Maximal degree in co-relation 9057. Up to 2431 conditions per place. [2024-11-20 09:42:21,259 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 60 selfloop transitions, 7 changer transitions 1/83 dead transitions. [2024-11-20 09:42:21,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 83 transitions, 467 flow [2024-11-20 09:42:21,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:42:21,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:42:21,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-11-20 09:42:21,263 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5633333333333334 [2024-11-20 09:42:21,263 INFO L175 Difference]: Start difference. First operand has 72 places, 57 transitions, 241 flow. Second operand 6 states and 169 transitions. [2024-11-20 09:42:21,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 83 transitions, 467 flow [2024-11-20 09:42:21,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 446 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-20 09:42:21,288 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 232 flow [2024-11-20 09:42:21,289 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2024-11-20 09:42:21,289 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2024-11-20 09:42:21,290 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 232 flow [2024-11-20 09:42:21,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:21,290 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:42:21,290 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, 1, 1, 1, 1, 1, 1] [2024-11-20 09:42:21,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 09:42:21,292 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 2 more)] === [2024-11-20 09:42:21,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:42:21,294 INFO L85 PathProgramCache]: Analyzing trace with hash -2091064566, now seen corresponding path program 1 times [2024-11-20 09:42:21,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:42:21,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894618648] [2024-11-20 09:42:21,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:42:21,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:42:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:42:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:42:21,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:42:21,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894618648] [2024-11-20 09:42:21,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894618648] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:42:21,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:42:21,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:42:21,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324733991] [2024-11-20 09:42:21,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:42:21,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 09:42:21,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:42:21,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 09:42:21,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-20 09:42:21,609 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-11-20 09:42:21,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 232 flow. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:21,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:42:21,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-11-20 09:42:21,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:42:21,945 INFO L124 PetriNetUnfolderBase]: 1675/2662 cut-off events. [2024-11-20 09:42:21,946 INFO L125 PetriNetUnfolderBase]: For 2466/2600 co-relation queries the response was YES. [2024-11-20 09:42:21,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6948 conditions, 2662 events. 1675/2662 cut-off events. For 2466/2600 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15036 event pairs, 241 based on Foata normal form. 254/2843 useless extension candidates. Maximal degree in co-relation 5736. Up to 1489 conditions per place. [2024-11-20 09:42:21,968 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 60 selfloop transitions, 5 changer transitions 4/84 dead transitions. [2024-11-20 09:42:21,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 84 transitions, 470 flow [2024-11-20 09:42:21,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:42:21,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:42:21,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-11-20 09:42:21,970 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-11-20 09:42:21,970 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 232 flow. Second operand 6 states and 171 transitions. [2024-11-20 09:42:21,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 84 transitions, 470 flow [2024-11-20 09:42:21,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 84 transitions, 442 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-20 09:42:21,974 INFO L231 Difference]: Finished difference. Result has 66 places, 52 transitions, 196 flow [2024-11-20 09:42:21,975 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=66, PETRI_TRANSITIONS=52} [2024-11-20 09:42:21,977 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2024-11-20 09:42:21,978 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 52 transitions, 196 flow [2024-11-20 09:42:21,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:21,978 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:42:21,978 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:42:21,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 09:42:21,979 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 2 more)] === [2024-11-20 09:42:21,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:42:21,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1454480985, now seen corresponding path program 1 times [2024-11-20 09:42:21,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:42:21,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519832809] [2024-11-20 09:42:21,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:42:21,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:42:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:42:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 09:42:22,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:42:22,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519832809] [2024-11-20 09:42:22,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519832809] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:42:22,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351458578] [2024-11-20 09:42:22,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:42:22,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:42:22,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:42:22,198 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:42:22,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 09:42:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:42:22,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 09:42:22,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:42:22,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 09:42:22,488 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 09:42:22,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351458578] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:42:22,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 09:42:22,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-20 09:42:22,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13789329] [2024-11-20 09:42:22,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:42:22,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:42:22,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:42:22,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:42:22,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-20 09:42:22,503 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-11-20 09:42:22,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 52 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:22,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:42:22,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-11-20 09:42:22,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:42:23,015 INFO L124 PetriNetUnfolderBase]: 2193/3358 cut-off events. [2024-11-20 09:42:23,015 INFO L125 PetriNetUnfolderBase]: For 3279/3502 co-relation queries the response was YES. [2024-11-20 09:42:23,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8991 conditions, 3358 events. 2193/3358 cut-off events. For 3279/3502 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 18601 event pairs, 311 based on Foata normal form. 296/3626 useless extension candidates. Maximal degree in co-relation 8963. Up to 1219 conditions per place. [2024-11-20 09:42:23,040 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 75 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2024-11-20 09:42:23,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 101 transitions, 557 flow [2024-11-20 09:42:23,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:42:23,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:42:23,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-11-20 09:42:23,042 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-11-20 09:42:23,042 INFO L175 Difference]: Start difference. First operand has 66 places, 52 transitions, 196 flow. Second operand 6 states and 188 transitions. [2024-11-20 09:42:23,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 101 transitions, 557 flow [2024-11-20 09:42:23,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 101 transitions, 525 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-11-20 09:42:23,046 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 265 flow [2024-11-20 09:42:23,047 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2024-11-20 09:42:23,048 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2024-11-20 09:42:23,048 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 265 flow [2024-11-20 09:42:23,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:23,050 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:42:23,050 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:42:23,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-20 09:42:23,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-20 09:42:23,252 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 2 more)] === [2024-11-20 09:42:23,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:42:23,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1440231369, now seen corresponding path program 2 times [2024-11-20 09:42:23,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:42:23,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988893205] [2024-11-20 09:42:23,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:42:23,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:42:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:42:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 09:42:23,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:42:23,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988893205] [2024-11-20 09:42:23,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988893205] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:42:23,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:42:23,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:42:23,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456898891] [2024-11-20 09:42:23,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:42:23,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 09:42:23,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:42:23,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 09:42:23,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-20 09:42:23,622 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-11-20 09:42:23,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 265 flow. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:23,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:42:23,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-11-20 09:42:23,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:42:24,155 INFO L124 PetriNetUnfolderBase]: 2377/3588 cut-off events. [2024-11-20 09:42:24,155 INFO L125 PetriNetUnfolderBase]: For 5801/6022 co-relation queries the response was YES. [2024-11-20 09:42:24,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11196 conditions, 3588 events. 2377/3588 cut-off events. For 5801/6022 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 19516 event pairs, 251 based on Foata normal form. 281/3813 useless extension candidates. Maximal degree in co-relation 11166. Up to 2357 conditions per place. [2024-11-20 09:42:24,186 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 74 selfloop transitions, 8 changer transitions 0/97 dead transitions. [2024-11-20 09:42:24,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 97 transitions, 592 flow [2024-11-20 09:42:24,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:42:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:42:24,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-11-20 09:42:24,188 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5628571428571428 [2024-11-20 09:42:24,188 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 265 flow. Second operand 7 states and 197 transitions. [2024-11-20 09:42:24,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 97 transitions, 592 flow [2024-11-20 09:42:24,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 97 transitions, 581 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-20 09:42:24,195 INFO L231 Difference]: Finished difference. Result has 73 places, 63 transitions, 304 flow [2024-11-20 09:42:24,195 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=304, PETRI_PLACES=73, PETRI_TRANSITIONS=63} [2024-11-20 09:42:24,196 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 22 predicate places. [2024-11-20 09:42:24,196 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 63 transitions, 304 flow [2024-11-20 09:42:24,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:24,197 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:42:24,197 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:42:24,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-20 09:42:24,197 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-20 09:42:24,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:42:24,198 INFO L85 PathProgramCache]: Analyzing trace with hash -948544537, now seen corresponding path program 1 times [2024-11-20 09:42:24,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:42:24,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212880343] [2024-11-20 09:42:24,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:42:24,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:42:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:42:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 09:42:24,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:42:24,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212880343] [2024-11-20 09:42:24,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212880343] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:42:24,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388123953] [2024-11-20 09:42:24,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:42:24,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:42:24,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:42:24,440 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:42:24,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 09:42:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:42:24,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 09:42:24,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:42:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 09:42:24,632 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 09:42:24,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388123953] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:42:24,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 09:42:24,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-20 09:42:24,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113581874] [2024-11-20 09:42:24,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:42:24,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:42:24,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:42:24,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:42:24,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-20 09:42:24,646 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-11-20 09:42:24,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 63 transitions, 304 flow. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:24,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:42:24,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-11-20 09:42:24,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:42:25,985 INFO L124 PetriNetUnfolderBase]: 5568/8698 cut-off events. [2024-11-20 09:42:25,985 INFO L125 PetriNetUnfolderBase]: For 21496/22317 co-relation queries the response was YES. [2024-11-20 09:42:26,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27925 conditions, 8698 events. 5568/8698 cut-off events. For 21496/22317 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 55908 event pairs, 835 based on Foata normal form. 826/9297 useless extension candidates. Maximal degree in co-relation 27893. Up to 2697 conditions per place. [2024-11-20 09:42:26,063 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 102 selfloop transitions, 11 changer transitions 0/133 dead transitions. [2024-11-20 09:42:26,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 133 transitions, 937 flow [2024-11-20 09:42:26,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:42:26,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:42:26,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-11-20 09:42:26,065 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-11-20 09:42:26,065 INFO L175 Difference]: Start difference. First operand has 73 places, 63 transitions, 304 flow. Second operand 6 states and 192 transitions. [2024-11-20 09:42:26,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 133 transitions, 937 flow [2024-11-20 09:42:26,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 133 transitions, 924 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-20 09:42:26,089 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 383 flow [2024-11-20 09:42:26,090 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=383, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2024-11-20 09:42:26,095 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 28 predicate places. [2024-11-20 09:42:26,096 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 383 flow [2024-11-20 09:42:26,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:26,097 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:42:26,097 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:42:26,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 09:42:26,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-20 09:42:26,298 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-20 09:42:26,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:42:26,299 INFO L85 PathProgramCache]: Analyzing trace with hash 394025865, now seen corresponding path program 2 times [2024-11-20 09:42:26,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:42:26,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782883214] [2024-11-20 09:42:26,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:42:26,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:42:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:42:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 09:42:26,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:42:26,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782883214] [2024-11-20 09:42:26,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782883214] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:42:26,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:42:26,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:42:26,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013124198] [2024-11-20 09:42:26,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:42:26,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 09:42:26,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:42:26,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 09:42:26,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-20 09:42:26,659 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-11-20 09:42:26,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 383 flow. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:26,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:42:26,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-11-20 09:42:26,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:42:28,067 INFO L124 PetriNetUnfolderBase]: 6511/10158 cut-off events. [2024-11-20 09:42:28,067 INFO L125 PetriNetUnfolderBase]: For 33285/34067 co-relation queries the response was YES. [2024-11-20 09:42:28,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37339 conditions, 10158 events. 6511/10158 cut-off events. For 33285/34067 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 65698 event pairs, 1378 based on Foata normal form. 858/10829 useless extension candidates. Maximal degree in co-relation 37303. Up to 6443 conditions per place. [2024-11-20 09:42:28,152 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 101 selfloop transitions, 8 changer transitions 0/129 dead transitions. [2024-11-20 09:42:28,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 129 transitions, 1004 flow [2024-11-20 09:42:28,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:42:28,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:42:28,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-11-20 09:42:28,155 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-20 09:42:28,155 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 383 flow. Second operand 7 states and 200 transitions. [2024-11-20 09:42:28,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 129 transitions, 1004 flow [2024-11-20 09:42:28,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 129 transitions, 1001 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-20 09:42:28,200 INFO L231 Difference]: Finished difference. Result has 86 places, 74 transitions, 430 flow [2024-11-20 09:42:28,200 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=430, PETRI_PLACES=86, PETRI_TRANSITIONS=74} [2024-11-20 09:42:28,201 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 35 predicate places. [2024-11-20 09:42:28,202 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 74 transitions, 430 flow [2024-11-20 09:42:28,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:28,202 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:42:28,202 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:42:28,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-20 09:42:28,203 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-20 09:42:28,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:42:28,204 INFO L85 PathProgramCache]: Analyzing trace with hash -73587180, now seen corresponding path program 1 times [2024-11-20 09:42:28,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:42:28,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031341401] [2024-11-20 09:42:28,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:42:28,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:42:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:42:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:42:30,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:42:30,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031341401] [2024-11-20 09:42:30,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031341401] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:42:30,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419991676] [2024-11-20 09:42:30,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:42:30,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:42:30,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:42:30,477 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:42:30,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 09:42:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:42:30,615 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-20 09:42:30,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:42:31,589 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-11-20 09:42:31,590 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 46 treesize of output 42 [2024-11-20 09:42:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 09:42:31,604 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:42:35,725 WARN L851 $PredicateComparison]: unable to prove that (forall ((~q1~0.offset Int) (~q1~0.base Int)) (let ((.cse0 (select |c_#memory_int#1| ~q1~0.base))) (or (not (= (select (select |c_#memory_int#1| c_~f~0.base) (+ c_~f~0.offset (* c_~i~0 4))) (select .cse0 (+ (* c_~q1_back~0 4) ~q1~0.offset)))) (= (+ (select (select |c_#memory_int#1| c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4))) c_~total~0 (select .cse0 (+ (* c_~q1_front~0 4) ~q1~0.offset))) 0)))) is different from false [2024-11-20 09:42:36,082 INFO L349 Elim1Store]: treesize reduction 19, result has 92.5 percent of original size [2024-11-20 09:42:36,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 250 [2024-11-20 09:42:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2024-11-20 09:42:43,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419991676] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:42:43,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:42:43,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 26 [2024-11-20 09:42:43,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535483999] [2024-11-20 09:42:43,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:42:43,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-20 09:42:43,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:42:43,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-20 09:42:43,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=564, Unknown=1, NotChecked=48, Total=702 [2024-11-20 09:42:43,354 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-11-20 09:42:43,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 74 transitions, 430 flow. Second operand has 27 states, 27 states have (on average 16.555555555555557) internal successors, (447), 27 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:42:43,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:42:43,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-11-20 09:42:43,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:42:48,280 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (= c_~total~0 0))) (and (forall ((~q1~0.offset Int) (~q1~0.base Int)) (let ((.cse0 (select |c_#memory_int#1| ~q1~0.base))) (or (not (= (select (select |c_#memory_int#1| c_~f~0.base) (+ c_~f~0.offset (* c_~i~0 4))) (select .cse0 (+ (* c_~q1_back~0 4) ~q1~0.offset)))) (= (+ (select (select |c_#memory_int#1| c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4))) c_~total~0 (select .cse0 (+ (* c_~q1_front~0 4) ~q1~0.offset))) 0)))) (or (and (= c_~j~0 c_~i~0) (= c_~q2_front~0 0) (= c_~q1_back~0 c_~q1_front~0) .cse1) (not (= c_~q2_back~0 0))) .cse1)) is different from false [2024-11-20 09:43:13,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-20 09:43:17,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-20 09:43:21,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-20 09:43:25,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-20 09:43:29,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-20 09:43:33,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1]